Ambiakshi ToolsNetwork Check — contacts target hostNetworkingIPLookupReverseDNSLook up an IP address
Client IP, reverse PTR, ASN, and geo coordinates for any public address.
This tool sends your input (e.g. domain or URL) to retrieve live headers or DNS records. We do not store the response or track your target. How this works →
Run a lookup.
IP geolocation & reverse PTR lookup
IP geolocation data and reverse PTR records are retrieved from public registries. Geolocation represents ISP routing estimates, not physical GPS coordinates. PTR record updates are subject to recursive DNS caching.
Standard: Reverse PTR lookup uses RFC 3596 compliant 32-nibble IPv6 expansion and standard IPv4 in-addr.arpa delegation.
Frequently asked
Direct answers for search, answer engines, and generative crawlers.
A PTR (Pointer) record maps an IP address back to its associated domain name (the opposite of an A record). PTR records are critical for email deliverability; receiving mail servers reject incoming messages from mail servers whose IP addresses lack valid reverse DNS.
Feedback, bugs & custom requests
Found a bug, a math anomaly, or a missing feature on Look up an IP address? Send it to engineering — reports land in our Discord channel. Optional email if you want a follow-up.
Related tools
Canonical: /developer/reverse-dns-ip. Estimates and conversions are educational. See the full disclaimer.