Python WHOIS Domain Checker

A collection of Python scripts for checking domain name availability using both traditional WHOIS and modern RDAP protocols.

Features

• Bulk TLD Checker (lookup.py) - Check domain availability across all 1,500+ TLDs
• RDAP Lookup (rdap_bootstrap.py) - Modern RDAP protocol for detailed domain information
• SQLite Database - Store all lookups with full history tracking
• Query Tool (query_history.py) - Interactive tool to view historical data
• Automatic rate limiting to prevent server blocks
• Results saved to organized output files
• Real-time progress tracking

Installation

1. Clone or navigate to the repository

cd /path/to/python-whois

2. Create a virtual environment

python3 -m venv venv
source venv/bin/activate

3. Install dependencies

pip install -r requirements.txt

Usage

Bulk TLD Checker (lookup.py)

Checks a single domain name across all available TLDs (e.g., checks "mysite" against .com, .net, .org, etc.).

python3 lookup.py

Prompts:

• Enter domain name (without TLD extension)

Output Files:

• {domain_name}_available.txt - List of available domains
• {domain_name}_registered.txt - List of registered domains

Features:

• Checks 1,500+ TLDs automatically
• 1-second rate limiting between queries
• Real-time progress with ✓/✗ indicators
• Can be interrupted with Ctrl+C (progress saved)
• Estimated time: 25-30 minutes for full scan

Example:

Enter domain name (without TLD extension): mysite

Loading TLD list...
Found 1503 TLDs to check.

Checking availability (this may take a while)...

✓ mysite.com - AVAILABLE
✗ mysite.net - registered
✓ mysite.org - AVAILABLE
...

Results saved to:
  - mysite_available.txt
  - mysite_registered.txt

RDAP Lookup (rdap_bootstrap.py)

Uses modern RDAP protocol to check individual domains with detailed registration information. All lookups are automatically saved to SQLite database for historical tracking.

python3 rdap_bootstrap.py

Prompts:

• Enter full domain name (e.g., example.com)

Output:

• SQLite Database (domain_lookups.db) - All lookups stored with full history
• {domain_name}_rdap_available.txt - Available domains (appended)
• {domain_name}_rdap_registered.txt - Registered domains with details (appended)

Features:

• SQLite database storage - Full historical tracking
• Detailed registration information
• Registrar name
• Registration and expiration dates
• Domain status codes
• Historical lookup tracking (shows previous checks)
• No rate limiting needed (single query)

Example:

Database initialized: domain_lookups.db

Enter domain to check (e.g., example.com): google.com

Checking: google.com
✓ Saved to database

Result:
{
  "available": false,
  "registered": "1997-09-15T04:00:00Z",
  "expires": "2028-09-14T04:00:00Z",
  "last_changed": "2025-12-31T18:15:21Z",
  "statuses": [
    "client delete prohibited",
    "client transfer prohibited"
  ],
  "registrar": "MarkMonitor Inc."
}

Domain saved to google_com_rdap_registered.txt

📊 Historical lookups for google.com: 3 total
  Most recent checks:
  1. 2025-12-31T18:15:21Z - Registered
  2. 2025-12-30T10:20:15Z - Registered
  3. 2025-12-29T14:05:32Z - Registered

Query Historical Data (query_history.py)

Interactive tool to query the SQLite database and view historical lookup data.

python3 query_history.py

Features:

• View all domains in database
• Show complete history for any domain
• List available domains
• Find domains expiring soon
• View recent lookups
• Database statistics

Example Menu:

============================================================
Domain Lookup History Query Tool
============================================================
1. List all domains
2. View domain history
3. Show available domains
4. Show domains expiring soon
5. Show recent lookups
6. Database statistics
0. Exit
============================================================

📊 Database Statistics
============================================================
Total lookups: 47
Unique domains: 23
Available: 12
Registered: 35
First lookup: 2025-12-30T10:15:32Z
Last lookup: 2025-12-31T18:15:21Z

Files

• lookup.py - Bulk domain checker using WHOIS
• rdap_bootstrap.py - RDAP protocol checker with SQLite storage
• query_history.py - Interactive tool to query lookup history
• tlds.txt - Official IANA TLD list (auto-downloaded)
• requirements.txt - Python dependencies
• domain_lookups.db - SQLite database (auto-created)
• Output text files created during execution

Requirements

• Python 3.7+
• Dependencies:
  • python-whois - WHOIS protocol client
  • requests - HTTP requests for RDAP
  • python-dateutil - Date parsing

Rate Limiting

• WHOIS servers enforce rate limits (1-10 queries/second)
• lookup.py includes 1-second delays to prevent blocks
• Adjust time.sleep(1) if needed, but be cautious
• RDAP queries are typically less restrictive

Notes

• WHOIS lookups may fail for some TLDs (server issues, restrictions)
• Some registries return different response formats
• Available status should be verified before registration
• Results are appended to files, allowing multiple runs
• SQLite database stores complete history for trend analysis
• Database queries show how domain status changes over time
• Useful for monitoring domains you're tracking

License

MIT License - Free to use and modify