MyWebDNS

Independent DNS observations

Check PTR records across available probe locations.

PTR records map an IP address back to a hostname in the reverse DNS tree.

14 probes configured
  • EvidenceAnswer, TTL, probe status and latency
  • Record typesA through CAA, including PTR
  • LocationProbe-reported coordinates, never random markers

QUERY / DNS

Run a DNS check

DNS

Use a hostname for most records. PTR also accepts an IPv4 or IPv6 address.

Native browser record menu.

Lookup requests are protected against cross-site submission and rate limited.

Observation desk

DNS results

Every row is one sampled probe observation. Agreement describes matching answers among probes that returned data; it is not an uptime or country-wide propagation score.

Ready for a lookup

Enter a domain and choose a record type to populate the observation map and result table.

DNS record field guide

How to read a PTR record check

PTR records map an IP address back to a hostname in the reverse DNS tree.

When to use this lookup

Enter an IP address; MyWebDNS constructs the correct in-addr.arpa or ip6.arpa query name on the server.

Example

8.8.8.8 PTR dns.google
Answer shape
A hostname returned from the reverse IPv4 or IPv6 namespace for the submitted public address.
Common failure
The address provider has not delegated or published reverse DNS, or the returned hostname does not resolve forward to the same address.
Related checks
A record, AAAA record

Troubleshooting checklist

  • Reverse DNS is normally controlled by the IP address provider, not the domain registrar.
  • For mail, make sure the PTR hostname resolves forward to the same sending IP.
  • A missing PTR does not prove the IP itself is unreachable.