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Playground demo key · api.reefapi.com
post/domain-intel/v1/reverse_dns1 credit

Reverse DNS (PTR): the hostname each of the domain's A/AAAA IPs resolves back to, or pass an explicit IPv4/IPv6 to PTR that single address. Missing PTR is a common mail-rejection cause.

Working example
Parameters
request preview
curl -X POST https://api.reefapi.com/domain-intel/v1/reverse_dns \
  -H "x-api-key: $REEF_KEY" \
  -H "content-type: application/json" \
  -d '{"domain":"github.com"}'

Hit Send to run this endpoint live.

Playground · ReefAPI