Reverse DNS Lookup
Find the hostname associated with any IP address
Bulk Lookup
Frequently Asked Questions
What is reverse DNS lookup?
Reverse DNS lookup (rDNS) resolves an IP address back to a hostname using PTR records. It is the opposite of a standard DNS lookup which resolves hostnames to IPs.
Why is reverse DNS important?
Reverse DNS is used for email server verification, security logging, network troubleshooting, and identifying who owns an IP address. Many mail servers reject emails from IPs without proper rDNS.
What is a PTR record?
A PTR (Pointer) record maps an IP address to a domain name. It is stored in a special reverse DNS zone and is the foundation of reverse DNS lookups.
How to Use
- Click Lookup or press Enter
- Use troubleshooting tips
- Check status indicators
- Review detailed results
FAQ
Is my query logged?
No. Queries processed in real time and not stored.
How often should I check?
After DNS changes, wait 24-48h for propagation then verify. Monitor weekly for changes.
How accurate are results?
Queries authoritative sources in real time. Results reflect current network state.
Why differ from other tools?
Different tools query different servers or use different methods. We show raw responses.
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