Reverse DNS Lookup

Perform reverse DNS lookups (PTR records) to find hostnames associated with IP addresses. Automatically handles both IPv4 and IPv6 addresses with proper .in-addr.arpa and .ip6.arpa zone formatting.

Common IP Examples

Reverse Lookup Configuration

About Reverse DNS Lookups

How it Works

Reverse DNS converts IP addresses to hostnames using PTR records. IPv4 addresses use .in-addr.arpa zones, while IPv6 addresses use .ip6.arpa zones with each nibble reversed.

Common Use Cases

  • Email server verification
  • Security analysis and logging
  • Network troubleshooting
  • Identifying server ownership

Zone Format Examples

IPv4: 8.8.8.8 → 8.8.8.8.in-addr.arpa
IPv6: 2001:db8::1 → 1.0.0.0...b.d.0.1.0.0.2.ip6.arpa