IP Lookup

Run an IP lookup on any IPv4 or IPv6 address to see who owns it: network operator, ASN, BGP route, address range, registered country, reverse DNS and abuse contact.

Enter any IPv4 or IPv6 address, or a domain name to look up the address it points to. Want your own? See what is my IP.

What this IP lookup shows

Enter any IPv4 or IPv6 address and this IP lookup tells you who it belongs to and how it is connected to the internet. Every detail comes from authoritative sources rather than guesswork:

  • Network operator and ASN: the Autonomous System that announces the address on the internet (for example AS15169, Google), from Team Cymru's free IP-to-ASN service built on live routing data.
  • Announced route (BGP prefix): the block of addresses the operator advertises to the rest of the internet.
  • Registered organisation, network name and address range, read from the regional internet registry that allocated the block (ARIN, RIPE NCC, APNIC, LACNIC or AFRINIC) using RDAP.
  • Registered country and allocation type.
  • Abuse contact: the right address to report spam, attacks or other abuse coming from that IP.
  • Reverse DNS: the PTR hostname, and whether it resolves back to the same address.
  • Address type: public, private, carrier-grade NAT, loopback, documentation or another special range.

You can also enter a domain name. The tool looks up the address it points to and lists any other addresses the domain uses.

ASN vs registered owner: why there are two names

The registered organisation is who the address block was allocated to. The network operator (AS name) is who actually routes it today. Usually they're the same company, but not always. A hosting company might route addresses registered to its customer, or a business might lease its address block to another provider. When the two differ, the AS name tells you whose network the traffic really comes from, which is usually what matters for blocking or reporting abuse.

Why we don't show a city or map

Many IP lookup sites show a precise city and a map pin. That location comes from commercial databases that guess based on where an address block has been seen, and for mobile networks, VPNs, cloud servers and many home connections it is often wrong by tens or hundreds of miles. We only show the registered country of the address block, from the registry records, because it's the location we can report reliably.

Common reasons to look up an IP address

  • Investigating suspicious traffic in server logs, firewall alerts or failed logins. The ASN and abuse contact tell you who to report it to.
  • Checking an email's origin: look up the IP in a message's Received headers to see which network really sent it.
  • Allow-listing or blocking a service: the announced route shows the whole range an organisation uses.
  • Diagnosing connectivity: confirm which provider and route an address belongs to before contacting support.

Frequently asked questions

Can an IP lookup find someone's home address?

No. Registry records show the internet provider or organisation that holds the address block, not individual customers. Only the provider can link an address to a subscriber, and normally only for legal requests.

What is an ASN?

An Autonomous System Number identifies a network that controls its own routing on the internet, such as an internet provider, cloud platform or large company. Every public IP address is announced by at least one ASN.

Why does a private IP show no owner?

Addresses like 192.168.x.x, 10.x.x.x and 172.16–31.x.x are reused inside millions of private networks and are never routed on the internet, so no registry or network owns them.

How do I report abuse from an IP address?

Send details (time, logs, what happened) to the abuse contact shown in the results. That's the network operator's official channel for handling spam, attacks and other misuse.