Reverse DNS Lookup

Look up the PTR record for an IP address and check it forward-confirms (FCrDNS), a key mail deliverability test.

Free tools from Total Group, IT support, cyber security and compliance for regulated businesses. Lookups run on our own servers; nothing you enter is stored or shared. Need help fixing what a check found? Talk to us.

Frequently asked questions

What is reverse DNS?

Reverse DNS maps an IP address back to a hostname using a PTR record. Mail servers check it, and a missing or mismatched PTR record is a common reason business email is rejected.