Open Terminal

IP Lookup

Available

Look up any IPv4 or IPv6 address: regional registry, network owner, ASN, CIDR range, registration country, abuse contact and reverse DNS.

Look up an IP address

Try:

Enter an IPv4 or IPv6 address — or use your own — to see who owns, routes and approximately locates it.

How it works

The NetTools server combines three public sources: the responsible regional internet registry’s RDAP record (found via the IANA bootstrap registry) for owner, range and abuse contact; Team Cymru’s IP-to-ASN mapping service for the network that announces the address in BGP; and reverse DNS. Each part is shown separately, so one unavailable source does not hide the others.

Safeguards & responsible use

  • Only public IP addresses are looked up; private and reserved ranges are explained instead.
  • Queries go only to IANA-listed RDAP servers and public DNS resolvers.
  • Only organizations and role mailboxes are shown — names of individual contacts are not displayed.

Frequently asked questions

Why do the network owner and the AS organization differ?

The registry records who holds the address block; BGP shows which network actually announces (routes) it. A company can hold addresses that its provider routes, or lease space from another holder — e.g. 1.1.1.0/24 is held by APNIC Research and Development and routed by Cloudflare.

Is the country where the IP is located?

No. Registries record the country the block is registered to, which is often not where the device is — large networks use their addresses worldwide. Physical location needs a geolocation database (see IP Geolocation), and even then it is approximate.

How do I report abuse from an IP?

Use the abuse contact from the registry record, include timestamps (with time zone), the destination and log excerpts. Avoid contacting individuals listed elsewhere in the record.

Which RIR manages my IP?

Five regional internet registries share the address space: ARIN (North America), RIPE NCC (Europe, Middle East, Central Asia), APNIC (Asia-Pacific), LACNIC (Latin America & Caribbean) and AFRINIC (Africa). The lookup finds the right one automatically.