Free Tool
Reverse DNS Lookup
The PTR record behind any IP address — forward-confirmed, the way mail servers actually check it.
Embed this tool on your website
Free to use on your own site — copy one snippet and it just works.
FAQ
About reverse DNS
What PTR records do and when they matter.
Email landing in spam?
rDNS, SPF, DKIM, DMARC — deliverability is a stack, and we set up the whole thing for business email that actually arrives.