What tools check PTR records?
PTR/reverse DNS checking:
MXToolbox Reverse Lookup: mxtoolbox.com/ReverseLookup.aspx - PTR lookup and FCrDNS verification.
DNS Checker PTR: dnschecker.org/ptr-lookup.php - global PTR checking.
Command line:
- dig -x 192.0.2.1
- Then verify: dig A [returned hostname]
What to verify:
- PTR record exists for your sending IP
- Hostname is meaningful (not generic/residential)
- Forward lookup matches (FCrDNS passes)
- Check for all sending IPs, including IPv6 addresses.
Verify your reverse registry entry exists and matches your forward registration.
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