IP & Hostname Lookup
Resolve a hostname to its IP (or an IP to its hostname) and geolocate it.
Resolves a hostname to its IP (or an IP back to its hostname) and geolocates it. Browsers cannot query DNS or IP geolocation databases directly, so this is sent to our server to run the lookup — see the FAQ below.
Enter an IP address or hostname to look it up.
About the IP & Hostname Lookup
Resolve a hostname to its IP address, or an IP address back to its hostname, and see where that IP is geolocated — country, region, city, ISP, and ASN. Useful for confirming which server a domain actually points at, or getting context on an IP address from a server log.
How to use it
- 1 Enter an IP address (e.g. 8.8.8.8) or a hostname (e.g. example.com).
- 2 Click Lookup.
- 3 A hostname resolves to its IP(s); an IP resolves to its reverse-DNS hostname, if it has one.
- 4 The geolocation panel shows where that IP is registered as being located.
What it does
- Bidirectional: hostname → IP or IP → hostname in the same box
- IPv4 and IPv6 support, including full reverse-DNS (PTR) lookups for both
- Geolocation: country, region, city, timezone, ISP, organization, and ASN
- Each half (resolution vs. geolocation) fails independently with its own message
Frequently asked questions
Is my lookup sent anywhere?
Partly. Browsers have no API for this, so the value you enter is sent to our server, which queries Cloudflare's public DNS resolver and a third-party IP geolocation service on your behalf and returns the result — nothing is logged or stored beyond that single request. Avoid looking up anything you would not want to leave your browser at all.
How accurate is IP geolocation?
It is generally accurate down to the city or ISP level, sourced from how IP address blocks are registered and routed — not from GPS or anything device-level, since an IP address carries no such data. A mobile carrier or VPN can show a location far from the actual device; treat this as "where this IP is administratively located," not a precise pin.
Why does an IP have no reverse DNS hostname?
A PTR (reverse DNS) record is optional — many IPs, especially residential and dynamically-assigned ones, are never given one. No PTR record is a normal, common result, not a failure.
What is an ASN?
An Autonomous System Number identifies the network operator that routes traffic for that IP block on the internet — effectively "which ISP or organization owns this chunk of address space." It is a routing concept, unrelated to who happens to be using a specific IP at a given moment.