diff --git a/README.md b/README.md
index c0577e1..f6357eb 100644
--- a/README.md
+++ b/README.md
@@ -85,11 +85,39 @@ Where columns are:
 4. Record Type (A, AAAA, MX, CNAME, TXT, etc.)
 5. Record Data (IP address, hostname, or other data depending on record type)
 
+## Domain Base Name Detection
+
+The application includes functionality to identify base domains from fully qualified domain names, including handling of multi-part TLDs like ".co.uk" or ".com.au".
+
+### Multi-Part TLD List
+
+The application uses a hardcoded list of common multi-part TLDs to correctly extract base domains (e.g., "example.co.uk" from "mail.example.co.uk").
+
+This list can be found in `main.py` as `MULTI_PART_TLDS`.
+
+### Updating the TLD List
+
+To ensure accurate domain parsing, you should periodically update the multi-part TLD list. The best sources for this information are:
+
+1. **Public Suffix List (PSL)**: The most comprehensive and authoritative source
+   - Website: https://publicsuffix.org/list/
+   - GitHub: https://github.com/publicsuffix/list
+   - This list is maintained by Mozilla and used by browsers and DNS applications
+
+2. **IANA's TLD Database**: The official registry of top-level domains
+   - Website: https://www.iana.org/domains/root/db
+
+3. **Commercial Domain Registrars**: Often provide lists of available TLDs
+   - Examples: GoDaddy, Namecheap, etc.
+
+For the most accurate and comprehensive implementation, consider implementing a parser for the Public Suffix List or using a library that maintains this list (e.g., `publicsuffix2` for Python).
+
 ## API Endpoints
 
 - `/api/uploads` - Get all uploads
-- `/api/slds` - Get all SLDs (Second Level Domains)
-- `/api/slds/{sld}` - Get domains by SLD
+- `/api/domains` - Get all domains
+- `/api/base-domains` - Get only unique base domains (e.g., example.com, example.co.uk) with simplified response format
+- `/api/domains/{domain}` - Get domains by name
 - `/api/dns` - Get all DNS records 
 - `/api/dns/types` - Get unique values for filters
 
@@ -100,8 +128,27 @@ You can filter the API results using the following query parameters:
 - `upload_id` - Filter by specific upload
 - `record_type` - Filter by DNS record type
 - `record_class` - Filter by DNS record class
-- `tld` - Filter by Top Level Domain
-- `sld` - Filter by Second Level Domain
 - `domain` - Search by domain name
+- `base_domains_only` - Only show base domains (e.g., example.com not mail.example.com)
+- `deduplicate` - For DNS records, control whether to show all records or deduplicate
 
-Example: `/api/dns?record_type=A&tld=com&upload_id=upload_20250408120000`
+Examples:
+- `/api/domains?base_domains_only=true` - Show only base domains
+- `/api/base-domains` - Get a simplified list of unique base domains
+- `/api/dns?record_type=A&domain=example.com&deduplicate=false` - Show all A records for example.com without deduplication
+
+### Response Format Examples
+
+1. Base Domains Endpoint (`/api/base-domains`):
+```json
+[
+  {
+    "domain": "example.com",
+    "timestamp": "2025-04-08T12:00:00"
+  },
+  {
+    "domain": "example.co.uk",
+    "timestamp": "2025-04-08T12:00:00"
+  }
+]
+```
diff --git a/main.py b/main.py
index 4baf1cb..ba34536 100644
--- a/main.py
+++ b/main.py
@@ -3,7 +3,7 @@ import re
 import io
 import datetime
 from fastapi import FastAPI, Request, HTTPException, Query, UploadFile, File, Form
-from fastapi.responses import HTMLResponse, RedirectResponse
+from fastapi.responses import HTMLResponse, RedirectResponse, Response
 from fastapi.staticfiles import StaticFiles
 from fastapi.templating import Jinja2Templates
 import uvicorn
@@ -32,29 +32,11 @@ def process_domain_entry(domain_entry):
     if domain_entry.endswith('.'):
         domain_entry = domain_entry[:-1]
     
-    # Parse domain components
-    parts = domain_entry.split('.')
-    if len(parts) > 1:
-        # For domain.tld format
-        if len(parts) == 2:
-            sld = parts[0]  # Second Level Domain
-            tld = parts[1]  # Top Level Domain
-            domain_info = {
-                "sld": sld,
-                "tld": tld,
-                "full_domain": domain_entry
-            }
-        # For subdomain.domain.tld format
-        else:
-            sld = parts[-2]  # Second Level Domain
-            tld = parts[-1]  # Top Level Domain
-            subdomain = '.'.join(parts[:-2])  # Subdomains
-            domain_info = {
-                "sld": sld,
-                "tld": tld,
-                "full_domain": domain_entry,
-                "subdomain": subdomain
-            }
+    if domain_entry:
+        # Store only the full domain name without splitting
+        domain_info = {
+            "full_domain": domain_entry
+        }
         return domain_info
     return None
 
@@ -90,7 +72,7 @@ async def process_csv_upload(file_content, upload_id, description=None):
             domain_info = process_domain_entry(domain_entry)
             if domain_info:
                 # Create a unique key to avoid duplicates within this upload
-                unique_key = f"{domain_info['sld']}.{domain_info['tld']}"
+                unique_key = domain_info['full_domain']
                 
                 if unique_key not in unique_domains:
                     unique_domains.add(unique_key)
@@ -127,22 +109,9 @@ async def process_csv_upload(file_content, upload_id, description=None):
                     "timestamp": timestamp
                 }
                 
-                # Add domain components
-                if len(domain_parts) > 1:
-                    if domain_parts[0].startswith('_'):  # Service records like _dmarc
-                        entry["service"] = domain_parts[0]
-                        # Adjust domain parts
-                        domain_parts = domain_parts[1:]
-                    
-                    # For domain.tld format
-                    if len(domain_parts) == 2:
-                        entry["sld"] = domain_parts[0]  # Second Level Domain
-                        entry["tld"] = domain_parts[1]  # Top Level Domain
-                    # For subdomain.domain.tld format
-                    elif len(domain_parts) > 2:
-                        entry["sld"] = domain_parts[-2]  # Second Level Domain
-                        entry["tld"] = domain_parts[-1]  # Top Level Domain
-                        entry["subdomain"] = '.'.join(domain_parts[:-2])  # Subdomains
+                # Add special handling for service records
+                if len(domain_parts) > 0 and domain_parts[0].startswith('_'):  # Service records like _dmarc
+                    entry["service"] = domain_parts[0]
                 
                 dns_records_to_insert.append(entry)
         
@@ -170,23 +139,42 @@ async def process_csv_upload(file_content, upload_id, description=None):
         print(traceback.format_exc())
         return 0, 0
 
-# Load domains from database - deduplicated by full domain name
-def load_domains(specific_upload_id: str = None) -> List[Dict]:
+# Load domains from database - deduplicated by full domain name, with optional base domain filtering
+def load_domains(specific_upload_id: str = None, base_domains_only: bool = False) -> List[Dict]:
     try:
         domains = domains_table.all()
         
         # If a specific upload ID is provided, only show domains from that upload
         if specific_upload_id:
             domains = [d for d in domains if d.get('upload_id') == specific_upload_id]
-            return domains
+            if not base_domains_only:
+                return domains
+        
+        # Add the base_domain field to each domain
+        for domain in domains:
+            domain['base_domain'] = extract_base_domain(domain.get('full_domain', ''))
         
         # Sort by timestamp in descending order (newest first)
         domains.sort(key=lambda x: x.get('timestamp', ''), reverse=True)
         
-        # Create a dictionary to track unique domains by full domain name
+        # Create a dictionary to track unique domains
         unique_domains = {}
+        base_domains_set = set()
+        
+        # First pass: collect all base domains
+        if base_domains_only:
+            for domain in domains:
+                base_domains_set.add(domain.get('base_domain', ''))
         
         for domain in domains:
+            # If base_domains_only is True, only keep domains that are base domains themselves
+            if base_domains_only:
+                full_domain = domain.get('full_domain', '')
+                base_domain = domain.get('base_domain', '')
+                
+                if full_domain != base_domain:
+                    continue
+            
             # Create a unique key based on the full domain name
             unique_key = domain.get('full_domain', '')
             
@@ -201,45 +189,131 @@ def load_domains(specific_upload_id: str = None) -> List[Dict]:
         print(f"Error loading domains from database: {e}")
         return []
 
-# Load DNS entries from database - deduplicated by domain, class, and type (no history)
-def load_dns_entries(specific_upload_id: str = None) -> List[Dict]:
+# Load DNS entries from database - with optional deduplication
+def load_dns_entries(specific_upload_id: str = None, deduplicate: bool = False) -> List[Dict]:
     try:
         entries = dns_records_table.all()
         
         # If a specific upload ID is provided, only show records from that upload
         if specific_upload_id:
             entries = [e for e in entries if e.get('upload_id') == specific_upload_id]
-            return entries
         
         # Sort by timestamp in descending order (newest first)
         entries.sort(key=lambda x: x.get('timestamp', ''), reverse=True)
         
-        # Create a dictionary to track unique entries (most recent only)
-        unique_entries = {}
-        
-        for entry in entries:
-            # Create a unique key based on domain, class, and type
-            unique_key = f"{entry.get('domain')}:{entry.get('record_class')}:{entry.get('record_type')}"
+        # If deduplication is requested, only keep the most recent entry for each unique combination
+        if deduplicate:
+            # Create a dictionary to track unique entries (most recent only)
+            unique_entries = {}
             
-            # Only keep the most recent entry for each unique combination
-            if unique_key not in unique_entries:
-                # Mark as most recent entry
-                entry['is_latest'] = True
-                unique_entries[unique_key] = entry
-        
-        # Return the deduplicated list with only the most recent entries
-        return list(unique_entries.values())
+            for entry in entries:
+                # Create a unique key based on domain, class, type, TTL, and data
+                unique_key = f"{entry.get('domain')}:{entry.get('record_class')}:{entry.get('record_type')}:{entry.get('ttl')}:{entry.get('record_data')}"
+                
+                # Only keep the most recent entry for each unique combination
+                if unique_key not in unique_entries:
+                    # Mark as most recent entry
+                    entry['is_latest'] = True
+                    unique_entries[unique_key] = entry
+            
+            # Return the deduplicated list with only the most recent entries
+            return list(unique_entries.values())
+        else:
+            # No deduplication - return all entries
+            return entries
     except Exception as e:
         print(f"Error loading DNS records from database: {e}")
         return []
 
+# List of known multi-part TLDs
+MULTI_PART_TLDS = [
+    'co.uk', 'org.uk', 'me.uk', 'ac.uk', 'gov.uk', 'net.uk', 'sch.uk',
+    'com.au', 'net.au', 'org.au', 'edu.au', 'gov.au', 'asn.au', 'id.au',
+    'co.nz', 'net.nz', 'org.nz', 'govt.nz', 'ac.nz', 'school.nz', 'geek.nz',
+    'com.sg', 'edu.sg', 'gov.sg', 'net.sg', 'org.sg', 'per.sg',
+    'co.za', 'org.za', 'web.za', 'net.za', 'gov.za', 'ac.za',
+    'com.br', 'net.br', 'org.br', 'gov.br', 'edu.br',
+    'co.jp', 'ac.jp', 'go.jp', 'or.jp', 'ne.jp', 'gr.jp',
+    'co.in', 'firm.in', 'net.in', 'org.in', 'gen.in', 'ind.in',
+    'edu.cn', 'gov.cn', 'net.cn', 'org.cn', 'com.cn', 'ac.cn',
+    'com.mx', 'net.mx', 'org.mx', 'edu.mx', 'gob.mx'
+]
+
+# Extract the base domain (SLD+TLD) from a full domain name
+def extract_base_domain(domain: str) -> str:
+    if not domain:
+        return domain
+        
+    # Remove trailing dot if present
+    if domain.endswith('.'):
+        domain = domain[:-1]
+        
+    parts = domain.split('.')
+    
+    # Check if the domain has enough parts
+    if len(parts) <= 1:
+        return domain
+        
+    # Check for known multi-part TLDs first
+    for tld in MULTI_PART_TLDS:
+        tld_parts = tld.split('.')
+        if len(parts) > len(tld_parts) and '.'.join(parts[-len(tld_parts):]) == tld:
+            # The domain has a multi-part TLD, extract SLD + multi-part TLD
+            return parts[-len(tld_parts)-1] + '.' + tld
+    
+    # Default case: extract last two parts
+    if len(parts) > 1:
+        return '.'.join(parts[-2:])
+        
+    return domain
+
+# Get all unique base domains from the database
+def get_unique_base_domains(specific_upload_id: str = None) -> List[Dict]:
+    try:
+        domains = domains_table.all()
+        
+        # If a specific upload ID is provided, only show domains from that upload
+        if specific_upload_id:
+            domains = [d for d in domains if d.get('upload_id') == specific_upload_id]
+        
+        # Add the base_domain field to each domain
+        for domain in domains:
+            domain['base_domain'] = extract_base_domain(domain.get('full_domain', ''))
+        
+        # Sort by timestamp in descending order (newest first)
+        domains.sort(key=lambda x: x.get('timestamp', ''), reverse=True)
+        
+        # Create dictionaries to track unique base domains
+        unique_base_domains = {}
+        
+        # Process each domain and keep only unique base domains
+        for domain in domains:
+            base_domain = domain.get('base_domain', '')
+            
+            # Skip if no base domain
+            if not base_domain:
+                continue
+                
+            # Check if this base domain has been seen before
+            if base_domain not in unique_base_domains:
+                # Create a new entry for this base domain - with simplified fields
+                base_domain_entry = {
+                    'domain': base_domain,
+                    'timestamp': domain.get('timestamp')
+                }
+                unique_base_domains[base_domain] = base_domain_entry
+        
+        # Return the list of unique base domains
+        return list(unique_base_domains.values())
+    except Exception as e:
+        print(f"Error getting unique base domains: {e}")
+        return []
+
 # Get unique values for filter dropdowns
 def get_unique_values(entries: List[Dict]) -> Dict[str, Set]:
     unique_values = {
         "record_type": set(),
-        "record_class": set(),
-        "tld": set(),
-        "sld": set()
+        "record_class": set()
     }
     
     for entry in entries:
@@ -276,18 +350,77 @@ def delete_upload(upload_id):
         print(f"Error deleting upload {upload_id}: {e}")
         return False
 
+# CSV Export Functions
+def domains_to_csv(domains: List[Dict]) -> str:
+    """Convert domains data to CSV format"""
+    csv_output = io.StringIO()
+    
+    if not domains:
+        return ""
+        
+    # Determine fields based on data
+    # Always include the full_domain field
+    fields = ["full_domain", "timestamp"]
+    if "base_domain" in domains[0]:
+        fields.insert(1, "base_domain")
+    
+    # Add headers
+    writer = csv.DictWriter(csv_output, fieldnames=fields, extrasaction='ignore')
+    writer.writeheader()
+    
+    # Add data
+    for domain in domains:
+        # Create a row dict with formatted timestamp
+        row = {k: domain.get(k) for k in fields}
+        if "timestamp" in row and row["timestamp"]:
+            # Format timestamp nicely for CSV
+            row["timestamp"] = row["timestamp"].replace('T', ' ').split('.')[0]
+        writer.writerow(row)
+    
+    return csv_output.getvalue()
+
+def dns_records_to_csv(records: List[Dict]) -> str:
+    """Convert DNS records data to CSV format"""
+    csv_output = io.StringIO()
+    
+    if not records:
+        return ""
+    
+    # Define the fields to include in the CSV
+    fields = ["domain", "ttl", "record_class", "record_type", "record_data", "timestamp"]
+    
+    # Add headers
+    writer = csv.DictWriter(csv_output, fieldnames=fields, extrasaction='ignore')
+    writer.writeheader()
+    
+    # Add data
+    for record in records:
+        # Create a row dict with formatted timestamp
+        row = {k: record.get(k) for k in fields}
+        if "timestamp" in row and row["timestamp"]:
+            # Format timestamp nicely for CSV
+            row["timestamp"] = row["timestamp"].replace('T', ' ').split('.')[0]
+        writer.writerow(row)
+    
+    return csv_output.getvalue()
+
 # Routes
 @app.get("/", response_class=HTMLResponse)
-async def home(request: Request, upload_id: Optional[str] = None):
-    """Home page with upload form and SLD listing"""
-    domains = load_domains(upload_id)
+async def home(
+    request: Request, 
+    upload_id: Optional[str] = None,
+    base_domains_only: Optional[bool] = False
+):
+    """Home page with upload form and domain listing"""
+    domains = load_domains(upload_id, base_domains_only)
     uploads = get_uploads()
     return templates.TemplateResponse(
         "index.html", 
         {
             "request": request, 
             "domains": domains,
-            "uploads": uploads
+            "uploads": uploads,
+            "base_domains_only": base_domains_only
         }
     )
 
@@ -361,28 +494,23 @@ async def dns_records(
     upload_id: Optional[str] = None,
     record_type: Optional[str] = None,
     record_class: Optional[str] = None,
-    tld: Optional[str] = None,
-    sld: Optional[str] = None,
-    domain: Optional[str] = None
+    domain: Optional[str] = None,
+    deduplicate: Optional[bool] = True  # Default to showing only unique latest entries
 ):
     """DNS Records page with filtering"""
-    # Get all entries first, based on upload_id if provided
-    entries = load_dns_entries(upload_id)
+    # Get all entries first, based on upload_id if provided, with deduplication option
+    entries = load_dns_entries(upload_id, deduplicate)
     
     # Apply additional filters if provided
     if record_type:
         entries = [e for e in entries if e.get("record_type") == record_type]
     if record_class:
         entries = [e for e in entries if e.get("record_class") == record_class]
-    if tld:
-        entries = [e for e in entries if e.get("tld") == tld]
-    if sld:
-        entries = [e for e in entries if e.get("sld") == sld]
     if domain:
         entries = [e for e in entries if domain.lower() in e.get("domain", "").lower()]
     
     # Get unique values for filter dropdowns from all entries (not filtered)
-    all_entries = load_dns_entries(upload_id)
+    all_entries = load_dns_entries(upload_id, deduplicate=False)
     unique_values = get_unique_values(all_entries)
     uploads = get_uploads()
     
@@ -392,34 +520,96 @@ async def dns_records(
             "request": request, 
             "entries": entries,
             "unique_values": unique_values,
-            "uploads": uploads
+            "uploads": uploads,
+            "deduplicate": deduplicate
         }
     )
 
+@app.get("/export-domains-csv")
+async def export_domains_csv(
+    upload_id: Optional[str] = None,
+    base_domains_only: Optional[bool] = False
+):
+    """Export domains as CSV"""
+    domains = load_domains(upload_id, base_domains_only)
+    csv_content = domains_to_csv(domains)
+    
+    # Generate a filename with timestamp
+    filename = f"domains_export_{datetime.datetime.now().strftime('%Y%m%d_%H%M%S')}.csv"
+    
+    # Return the CSV as a downloadable file
+    return Response(
+        content=csv_content,
+        media_type="text/csv",
+        headers={"Content-Disposition": f"attachment; filename={filename}"}
+    )
+
+@app.get("/export-dns-csv")
+async def export_dns_csv(
+    upload_id: Optional[str] = None,
+    record_type: Optional[str] = None,
+    record_class: Optional[str] = None,
+    domain: Optional[str] = None,
+    deduplicate: Optional[bool] = True
+):
+    """Export DNS records as CSV"""
+    # Get entries with applied filters
+    entries = load_dns_entries(upload_id, deduplicate)
+    
+    # Apply additional filters if provided
+    if record_type:
+        entries = [e for e in entries if e.get("record_type") == record_type]
+    if record_class:
+        entries = [e for e in entries if e.get("record_class") == record_class]
+    if domain:
+        entries = [e for e in entries if domain.lower() in e.get("domain", "").lower()]
+    
+    csv_content = dns_records_to_csv(entries)
+    
+    # Generate a filename with timestamp
+    filename = f"dns_records_export_{datetime.datetime.now().strftime('%Y%m%d_%H%M%S')}.csv"
+    
+    # Return the CSV as a downloadable file
+    return Response(
+        content=csv_content,
+        media_type="text/csv",
+        headers={"Content-Disposition": f"attachment; filename={filename}"}
+    )
+
 # API Routes
 @app.get("/api/uploads", response_model=List[Dict])
 async def get_all_uploads():
     """API endpoint that returns all uploads"""
     return get_uploads()
 
-@app.get("/api/slds", response_model=List[Dict])
-async def get_slds(upload_id: Optional[str] = None):
-    """API endpoint that returns all SLDs with optional filter by upload_id"""
-    # The load_domains function now handles deduplication and upload_id filtering
-    domains = load_domains(upload_id)
+@app.get("/api/domains", response_model=List[Dict])
+async def get_domains(
+    upload_id: Optional[str] = None,
+    base_domains_only: Optional[bool] = False
+):
+    """API endpoint that returns all domains with optional filtering"""
+    # The load_domains function handles deduplication and filtering
+    domains = load_domains(upload_id, base_domains_only)
     return domains
 
-@app.get("/api/slds/{sld}", response_model=List[Dict])
-async def get_domains_by_sld(sld: str, upload_id: Optional[str] = None):
-    """API endpoint that returns domains for a specific SLD with optional filter by upload_id"""
+@app.get("/api/base-domains", response_model=List[Dict])
+async def get_base_domains(upload_id: Optional[str] = None):
+    """API endpoint that returns only unique base domains"""
+    # Get only the unique base domains
+    base_domains = get_unique_base_domains(upload_id)
+    return base_domains
+
+@app.get("/api/domains/{domain}", response_model=List[Dict])
+async def get_domains_by_name(domain: str, upload_id: Optional[str] = None):
+    """API endpoint that returns domains matching a specific domain name with optional filter by upload_id"""
     # Get domains, already deduplicated and optionally filtered by upload_id
     all_domains = load_domains(upload_id)
     
-    # Filter by SLD
-    filtered = [item for item in all_domains if item["sld"].lower() == sld.lower()]
+    # Filter by domain name
+    filtered = [item for item in all_domains if domain.lower() in item["full_domain"].lower()]
     
     if not filtered:
-        raise HTTPException(status_code=404, detail=f"No domains found with SLD: {sld}")
+        raise HTTPException(status_code=404, detail=f"No domains found matching: {domain}")
     
     return filtered
 
@@ -427,24 +617,19 @@ async def get_domains_by_sld(sld: str, upload_id: Optional[str] = None):
 async def get_dns_entries(
     record_type: Optional[str] = None,
     record_class: Optional[str] = None,
-    tld: Optional[str] = None,
-    sld: Optional[str] = None,
     domain: Optional[str] = None,
-    upload_id: Optional[str] = None
+    upload_id: Optional[str] = None,
+    deduplicate: Optional[bool] = True
 ):
-    """API endpoint that returns filtered DNS entries"""
+    """API endpoint that returns filtered DNS entries with optional deduplication"""
     # Get entries - if upload_id is specified, only those entries are returned
-    entries = load_dns_entries(upload_id)
+    entries = load_dns_entries(upload_id, deduplicate)
     
     # Apply additional filters if provided
     if record_type:
         entries = [e for e in entries if e.get("record_type") == record_type]
     if record_class:
         entries = [e for e in entries if e.get("record_class") == record_class]
-    if tld:
-        entries = [e for e in entries if e.get("tld") == tld]
-    if sld:
-        entries = [e for e in entries if e.get("sld") == sld]
     if domain:
         entries = [e for e in entries if domain.lower() in e.get("domain", "").lower()]
     
diff --git a/templates/dns_records.html b/templates/dns_records.html
index f28ec83..d7bbb49 100644
--- a/templates/dns_records.html
+++ b/templates/dns_records.html
@@ -115,14 +115,10 @@
             background-color: #e0e0e0;
             color: #333;
         }
-        .sld-badge {
+        .domain-badge {
             background-color: #d1e7dd;
             color: #0f5132;
         }
-        .tld-badge {
-            background-color: #cfe2ff;
-            color: #0a58ca;
-        }
         .service-badge {
             background-color: #fff3cd;
             color: #664d03;
@@ -149,6 +145,13 @@
             margin-left: 10px;
             font-weight: normal;
         }
+        .dedup-note {
+            display: block;
+            font-size: 0.7em;
+            color: #666;
+            font-weight: normal;
+            margin-top: 5px;
+        }
         .tooltip {
             position: relative;
             display: inline-block;
@@ -181,14 +184,43 @@
                 width: 100%;
             }
         }
+        .table-header {
+            display: flex;
+            justify-content: space-between;
+            align-items: flex-start;
+            margin-bottom: 15px;
+        }
+        .table-actions {
+            display: flex;
+            gap: 10px;
+            margin-top: 10px;
+        }
+        .btn-export {
+            display: inline-flex;
+            align-items: center;
+            gap: 5px;
+            padding: 8px 15px;
+            background-color: #4CAF50;
+            color: white;
+            border-radius: 4px;
+            text-decoration: none;
+            font-weight: bold;
+            font-size: 0.9em;
+        }
+        .btn-export:hover {
+            background-color: #45a049;
+        }
+        .icon {
+            font-size: 1.2em;
+        }
     </style>
 </head>
 <body>
     <div class="container">
-        <h1>DNS Entry Viewer</h1>
+        <h1>DNS Records Viewer {% if deduplicate %}(Deduplicated){% else %}(All Records){% endif %}</h1>
         
         <div class="nav">
-            <a href="/" class="nav-link">SLD View</a>
+            <a href="/" class="nav-link">Domains</a>
             <a href="/dns-records" class="nav-link">DNS Records</a>
         </div>
         
@@ -222,35 +254,46 @@
                     {% endfor %}
                 </select>
             </div>
-            <div class="filter-group">
-                <label for="tld">TLD:</label>
-                <select id="tld" name="tld">
-                    <option value="">All TLDs</option>
-                    {% for tld in unique_values.tld %}
-                    <option value="{{ tld }}" {% if request.query_params.get('tld') == tld %}selected{% endif %}>{{ tld }}</option>
-                    {% endfor %}
-                </select>
-            </div>
-            <div class="filter-group">
-                <label for="sld">SLD:</label>
-                <select id="sld" name="sld">
-                    <option value="">All SLDs</option>
-                    {% for sld in unique_values.sld %}
-                    <option value="{{ sld }}" {% if request.query_params.get('sld') == sld %}selected{% endif %}>{{ sld }}</option>
-                    {% endfor %}
-                </select>
-            </div>
             <div class="filter-group">
                 <label for="domain-search">Domain Search:</label>
                 <input type="text" id="domain-search" name="domain" placeholder="Enter domain name..." value="{{ request.query_params.get('domain', '') }}">
             </div>
+            <div class="filter-group">
+                <label for="deduplicate">Deduplicate Records:</label>
+                <select id="deduplicate" name="deduplicate" class="filter-select">
+                    <option value="true" {% if request.query_params.get('deduplicate', 'true') == 'true' %}selected{% endif %}>Yes (Deduplicate Identical Records)</option>
+                    <option value="false" {% if request.query_params.get('deduplicate') == 'false' %}selected{% endif %}>No (Show All)</option>
+                </select>
+            </div>
             <div class="filter-buttons">
                 <button type="submit">Apply Filters</button>
                 <a href="/dns-records" class="reset-button" style="padding: 8px 16px; background-color: #f44336; color: white; text-decoration: none; border-radius: 4px; font-weight: bold; display: inline-block;">Reset</a>
             </div>
         </form>
+
+        <div class="api-section">
+            <h3>API Endpoints</h3>
+            <p>Get all DNS entries: <code>/api/dns</code></p>
+            <p>Get filtered DNS entries: <code>/api/dns?record_type=A&domain=example.com</code></p>
+            <p>Filter by upload: <code>/api/dns?upload_id={upload_id}</code></p>
+            <p>Show all records (no deduplication): <code>/api/dns?deduplicate=false</code></p>
+            <p>Get unique filter values: <code>/api/dns/types</code></p>
+        </div>
         
-        <h2>DNS Records <span class="count-badge">{{ entries|length }}</span></h2>
+        <div class="table-header">
+            <h2>DNS Records <span class="count-badge">{{ entries|length }}</span>
+                {% if deduplicate %}
+                <small class="dedup-note">(Showing most recent entries for each Domain+Class+Type+TTL+Data combination)</small>
+                {% endif %}
+            </h2>
+            {% if entries %}
+            <div class="table-actions">
+                <a href="/export-dns-csv?{% if request.query_params.get('upload_id') %}upload_id={{ request.query_params.get('upload_id') }}{% endif %}{% if request.query_params.get('record_type') %}&record_type={{ request.query_params.get('record_type') }}{% endif %}{% if request.query_params.get('record_class') %}&record_class={{ request.query_params.get('record_class') }}{% endif %}{% if request.query_params.get('domain') %}&domain={{ request.query_params.get('domain') }}{% endif %}{% if request.query_params.get('deduplicate') == 'false' %}&deduplicate=false{% endif %}" class="btn-export" title="Export to CSV">
+                    <span class="icon">📥</span> Export CSV
+                </a>
+            </div>
+            {% endif %}
+        </div>
         
         {% if entries %}
             <table id="dns-table">
@@ -271,11 +314,7 @@
                             {% if entry.get('service') %}
                             <span class="badge service-badge">{{ entry.service }}</span>
                             {% endif %}
-                            {% if entry.get('subdomain') %}
-                            {{ entry.subdomain }}.
-                            {% endif %}
-                            <span class="badge sld-badge">{{ entry.sld }}</span>.
-                            <span class="badge tld-badge">{{ entry.tld }}</span>
+                            <span class="badge domain-badge">{{ entry.domain }}</span>
                         </td>
                         <td>{{ entry.ttl }}</td>
                         <td>{{ entry.record_class }}</td>
@@ -298,14 +337,6 @@
         {% else %}
             <p>No DNS entries found. Please upload a CSV file to get started.</p>
         {% endif %}
-        
-        <div class="api-section">
-            <h2>API Endpoints</h2>
-            <p>Get all DNS entries: <code>/api/dns</code></p>
-            <p>Get filtered DNS entries: <code>/api/dns?record_type=A&tld=de</code></p>
-            <p>Filter by upload: <code>/api/dns?upload_id={upload_id}</code></p>
-            <p>Get unique filter values: <code>/api/dns/types</code></p>
-        </div>
     </div>
     
     <!-- All JavaScript removed, using server-side FastAPI for filtering -->
diff --git a/templates/index.html b/templates/index.html
index 6b4f35f..95a4581 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -53,7 +53,7 @@
         tr:hover {
             background-color: #f5f5f5;
         }
-        .sld-badge {
+        .domain-badge {
             display: inline-block;
             padding: 3px 7px;
             background-color: #d1e7dd;
@@ -61,7 +61,7 @@
             font-size: 0.9em;
             color: #0f5132;
         }
-        .tld-badge {
+        .base-domain-badge {
             display: inline-block;
             padding: 3px 7px;
             background-color: #cfe2ff;
@@ -69,6 +69,15 @@
             font-size: 0.9em;
             color: #0a58ca;
         }
+        .same-domain-badge {
+            display: inline-block;
+            padding: 3px 7px;
+            background-color: #e9ecef;
+            border-radius: 4px;
+            font-size: 0.9em;
+            color: #6c757d;
+            font-style: italic;
+        }
         .api-section {
             margin-top: 30px;
             padding: 15px;
@@ -135,12 +144,76 @@
         }
         .filter-form {
             margin-bottom: 20px;
+            background-color: #f9f9f9;
+            padding: 15px;
+            border-radius: 5px;
+        }
+        .filter-row {
+            display: flex;
+            flex-wrap: wrap;
+            gap: 15px;
+            align-items: flex-end;
+        }
+        .filter-group {
+            display: flex;
+            flex-direction: column;
+        }
+        .filter-group label {
+            font-weight: bold;
+            margin-bottom: 5px;
+            font-size: 0.9em;
         }
         .filter-select {
             padding: 8px 12px;
             border: 1px solid #ddd;
             border-radius: 4px;
-            margin-right: 10px;
+            min-width: 150px;
+        }
+        .btn-sm {
+            padding: 8px 16px;
+            font-size: 0.9em;
+        }
+        .reset-button {
+            display: inline-block;
+            padding: 8px 16px;
+            background-color: #f44336;
+            color: white;
+            text-decoration: none;
+            border-radius: 4px;
+            font-weight: bold;
+            font-size: 0.9em;
+        }
+        .reset-button:hover {
+            background-color: #e53935;
+            color: white;
+        }
+        .table-header {
+            display: flex;
+            justify-content: space-between;
+            align-items: center;
+            margin-bottom: 15px;
+        }
+        .table-actions {
+            display: flex;
+            gap: 10px;
+        }
+        .btn-export {
+            display: inline-flex;
+            align-items: center;
+            gap: 5px;
+            padding: 8px 15px;
+            background-color: #4CAF50;
+            color: white;
+            border-radius: 4px;
+            text-decoration: none;
+            font-weight: bold;
+            font-size: 0.9em;
+        }
+        .btn-export:hover {
+            background-color: #45a049;
+        }
+        .icon {
+            font-size: 1.2em;
         }
     </style>
 </head>
@@ -149,7 +222,7 @@
         <h1>Domain Management System</h1>
         
         <div class="nav">
-            <a href="/" class="nav-link">SLD View</a>
+            <a href="/" class="nav-link">Domains</a>
             <a href="/dns-records" class="nav-link">DNS Records</a>
         </div>
         
@@ -207,45 +280,71 @@
         <div class="filter-form">
             <h2>Domain List</h2>
             <form id="filterForm" method="get">
-                <label for="upload_filter">Filter by upload:</label>
-                <select id="upload_filter" name="upload_id" class="filter-select" onchange="this.form.submit()">
-                    <option value="">All uploads</option>
-                    {% for upload in uploads %}
-                    <option value="{{ upload.id }}" {% if request.query_params.get('upload_id') == upload.id %}selected{% endif %}>
-                        {{ upload.filename }} - {{ upload.timestamp.replace('T', ' ').split('.')[0] }}
-                    </option>
-                    {% endfor %}
-                </select>
+                <div class="filter-row">
+                    <div class="filter-group">
+                        <label for="upload_filter">Filter by upload:</label>
+                        <select id="upload_filter" name="upload_id" class="filter-select">
+                            <option value="">All uploads</option>
+                            {% for upload in uploads %}
+                            <option value="{{ upload.id }}" {% if request.query_params.get('upload_id') == upload.id %}selected{% endif %}>
+                                {{ upload.filename }} - {{ upload.timestamp.replace('T', ' ').split('.')[0] }}
+                            </option>
+                            {% endfor %}
+                        </select>
+                    </div>
+                    
+                    <div class="filter-group">
+                        <label for="base_domains_only">Show base domains only:</label>
+                        <select id="base_domains_only" name="base_domains_only" class="filter-select">
+                            <option value="false" {% if request.query_params.get('base_domains_only', 'false') == 'false' %}selected{% endif %}>No (Show All)</option>
+                            <option value="true" {% if request.query_params.get('base_domains_only') == 'true' %}selected{% endif %}>Yes (example.com only)</option>
+                        </select>
+                    </div>
+                    
+                    <div class="filter-buttons">
+                        <button type="submit" class="btn btn-sm">Apply Filters</button>
+                        <a href="/" class="reset-button">Reset</a>
+                    </div>
+                </div>
             </form>
         </div>
         
         <div class="api-section">
             <h3>API Endpoints</h3>
             <p>Get all uploads: <code>/api/uploads</code></p>
-            <p>Get all domains: <code>/api/slds</code></p>
-            <p>Get domains by SLD: <code>/api/slds/{sld}</code></p>
-            <p>Filter by upload: <code>/api/slds?upload_id={upload_id}</code></p>
+            <p>Get all domains: <code>/api/domains</code></p>
+            <p>Get only base domains: <code>/api/base-domains</code> (simplified format: <code>{"domain": "example.com", "timestamp": "..."}</code>)</p>
+            <p>Get domains by name: <code>/api/domains/{domain}</code></p>
+            <p>Filter by upload: <code>/api/domains?upload_id={upload_id}</code></p>
+            <p>Show base domains only: <code>/api/domains?base_domains_only=true</code></p>
         </div>
         
         {% if domains %}
-            <p>Found {{ domains|length }} domains{% if request.query_params.get('upload_id') %} in this upload{% endif %}.</p>
+            <div class="table-header">
+                <p>Found {{ domains|length }} domains{% if request.query_params.get('upload_id') %} in this upload{% endif %}.</p>
+                <div class="table-actions">
+                    <a href="/export-domains-csv?{% if request.query_params.get('upload_id') %}upload_id={{ request.query_params.get('upload_id') }}{% endif %}{% if request.query_params.get('base_domains_only') == 'true' %}&base_domains_only=true{% endif %}" class="btn-export" title="Export to CSV">
+                        <span class="icon">📥</span> Export CSV
+                    </a>
+                </div>
+            </div>
             <table>
                 <thead>
                     <tr>
-                        <th>SLD</th>
-                        <th>TLD</th>
-                        <th>Subdomain</th>
-                        <th>Full Domain</th>
+                        <th>Domain</th>
+                        {% if not base_domains_only %}
+                        <th>Base Domain</th>
+                        {% endif %}
                         <th>Upload Date</th>
                     </tr>
                 </thead>
                 <tbody>
                     {% for item in domains %}
                     <tr>
-                        <td><span class="sld-badge">{{ item.sld }}</span></td>
-                        <td><span class="tld-badge">{{ item.tld }}</span></td>
-                        <td>{{ item.get('subdomain', 'N/A') }}</td>
-                        <td>{{ item.full_domain }}</td>
+                        <td><span class="domain-badge">{{ item.full_domain }}</span></td>
+                        {% if not base_domains_only %}
+                        <td>{% if item.base_domain != item.full_domain %}<span class="base-domain-badge">{{ item.base_domain }}</span>{% else %}<span class="same-domain-badge">Same as domain</span>{% endif %}</td>
+                        {% endif %}
                         <td>{{ item.timestamp.replace('T', ' ').split('.')[0] if item.get('timestamp') else 'N/A' }}</td>
                     </tr>
                     {% endfor %}