IP Address Lookup
Find out who an IP address belongs to. Enter an IPv4 or IPv6 address — or a domain — to see its network owner, ASN, routing prefix, registry details and reverse DNS.
Checked live from our server — no signup Free, no limits
How to use the IP Lookup
- Enter an IP address (IPv4 or IPv6) or a domain name.
- Click Look up. For a domain, pick which of its addresses to inspect if it has several.
- Review the owner, ASN and BGP prefix, the registered network range and the abuse contact.
- Use Copy summary to paste the key facts into a ticket or abuse report.
Frequently asked questions
Can an IP lookup show someone's exact location?
No. This tool shows the country where the network is registered with its regional internet registry, plus the ISP or organisation that holds it. That's often not where the device is — cloud, mobile and VPN networks use one registration for addresses worldwide — and no public data reveals a street address.
What is an ASN?
An Autonomous System Number identifies a network (an ISP, cloud provider or large company) that announces its own IP ranges to the internet using BGP. The BGP prefix is the block of addresses that route belongs to.
How do I report abuse from an IP address?
Use the abuse contact email shown in the registration details. Include the IP, exact timestamps with time zone, and logs that show the activity — the network owner can then trace which customer was using the address.
What are private IP addresses?
Ranges such as 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16 (and fc00::/7 for IPv6) are reserved for local networks. They are reused in millions of homes and offices, so they have no owner or location to look up.
What is reverse DNS?
Reverse DNS (a PTR record) maps an IP address back to a hostname, such as dns.google for 8.8.8.8. It's set by whoever controls the IP block and often hints at the provider or the server's role.
Where does this data come from?
Routing data comes from Team Cymru's IP-to-ASN service, registration details from the regional internet registries (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC) via RDAP, and hostnames from reverse DNS.