DNS Checker

What is DNS Checker?

DNS Checker is a Python-based application that performs DNS operations and provides comprehensive domain information. It features checks for MX, SPF, DKIM, DMARC records, website status, SSL certificates, and WHOIS data.

How to use DNS Checker?

Clone the repository, install required dependencies with pip install -r requirements.txt, then start the application with python app.py. Access the web interface at http://localhost:5000. Use endpoints like /check and /get-domain-info to interact programmatically.

Key features of DNS Checker

• DNS record checks (MX, A, CNAME, NS, SPF, DKIM, DMARC)
• Website status monitoring with response time
• SSL certificate details (issuer and expiry)
• WHOIS domain registration retrieval
• Domain grouping by nameserver or migration complexity
• Session management for saving and loading domain lists

Use cases of DNS Checker

• Categorize domains by their MX record type
• Group domains by nameserver for migration planning
• Retrieve SSL certificate information for security audits
• Check website status and redirects
• Save and reload domain lists for recurring analyses

FAQ from DNS Checker

What are the runtime requirements?

Python 3.8 or higher, Flask, and the libraries listed in requirements.txt.

How do I install and run DNS Checker?

Clone the repository, install dependencies with pip install -r requirements.txt, and start with python app.py. Then open http://localhost:5000 in a browser.

Where does DNS Checker store cached domain information?

Cached data is stored in a temporary directory configured in the application.

Can I save and load domain lists?

Yes, via the /save-domain-list, /get-saved-lists, and /load-domain-list API endpoints.

Does DNS Checker provide API endpoints?

Yes, it includes endpoints such as /check, /get-mx-records, /get-domain-info, and /group-by-nameserver.