How to use the ip lookup
- Paste an address such as 1.1.1.1 or 2606:4700:4700::1111 and press Look up.
- Read the header: address version, a warning if it is private or reserved, and the reverse DNS name when one exists.
- Check the ASN and prefix to learn which network operator routes the address, and the RDAP section to see who the block is registered to.
- Copy the report if you need to attach it to a support ticket or abuse complaint.
Features
- IPv4 and IPv6, with IPv6 shown both compressed and fully expanded
- Special-range detection: private, loopback, link-local, carrier-grade NAT, documentation, multicast and more
- Reverse DNS (PTR) names from the address's own reverse zone
- Origin AS number, announced prefix, registry country and RIR from Team Cymru's IP-to-ASN service, plus the AS name
- Registry record via RDAP: organisation, network name, full range, assignment type and dates
What each part tells you
The AS number identifies the network operator announcing the address on the internet's routing system: an ISP, a cloud provider, a CDN or a large company. The prefix is the block of addresses announced together. If you are chasing the source of traffic, the ASN is usually the most useful single fact, because abuse contacts are organised per network.
The RDAP record comes from the regional registry (ARIN, RIPE NCC, APNIC, LACNIC or AFRINIC) and shows who the block is assigned to on paper, which can differ from who announces it; a hosting company may announce space assigned to its customer, for example.
Reverse DNS is set by whoever controls the block. A name like mail.example.com is a hint about purpose, but it is not verified and can be missing or misleading.
Location is not part of this tool
The country shown is the registry's country for the block, which is where the organisation registered it, not where the machine is. City-level geolocation databases are commercial estimates and are deliberately not used here, so nothing about the address is sent to a third-party service. For your own connection's approximate location, the What Is My IP tool reads what the hosting platform attaches to your request.