Reverse DNS Lookup
A PTR record maps an IP address back to a host name. Mail servers in particular need a correct one. The tool looks up the PTR record of an address.
Checked by our server, free and without an account
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What the tool looks at
- The host names stored in the PTR record.
- Whether a PTR record exists at all.
How it works
- Enter the address. Only public web addresses on the standard ports are accepted.
- Our server fetches what the check needs once, with its own honest bot name, and evaluates it.
- You get the evaluated values with a short explanation. Nothing from the page is stored.
More DNS and network tools
All tools- DNS LookupLook up the DNS records of a domain – A, AAAA, CNAME, MX, NS, TXT and more in one list.
- SPF CheckerCheck the SPF record of a domain – present, unique and which servers may send mail for it.
- Domain WHOIS LookupLook up the registration data of a domain – registrar, creation and expiry date, status and name servers.
- IP Address LookupLook up an IP address – the network it belongs to, the owner, the country and its reverse DNS name.
- Website Hosting CheckerFind out who hosts a website – the IP addresses of the domain and the networks they belong to.
The whole page in one audit
One audit runs more than 50 tests, rates them by severity and turns them into a score. Websites are re-checked on a schedule.