Free tool
IP address lookup
An IP lookup shows who owns an IP address and how it is routed: owner organization, network name, ASN, country, CIDR range, registry and reverse DNS. It starts with your own IP; enter any public IPv4 or IPv6 address to look it up.
How the IP lookup works
- 1
Find the right registry
IANA's RDAP bootstrap data says which of the five regional internet registries manages the address block. - 2
Ask the registry over RDAP
The registry returns the registered network: its name, owner, range, country, allocation type and abuse contact. - 3
Look up routing and reverse DNS
In parallel we find the ASN that announces the address and its PTR record, if one is set. - 4
Show it in one table
Results are cached for an hour, and nothing about your lookups is stored or logged.
Why IP ownership matters for proxy users
Every website you visit can run the same lookup. The network and ASN behind an IP tell it whether the visitor sits on a home ISP, a mobile carrier or a hosting provider, and that decides how much it trusts the request.
Verify what you bought
Look up a proxy's exit IP: an ISP proxy should belong to a consumer internet provider, not a hosting company.
Check the location
Make sure the registered country matches the location you need before you point accounts at an IP.
Spot data center ranges
Hosting ASNs are the first thing anti-bot systems block. Real ISP ASNs pass as everyday home traffic.
Find the abuse contact
The registry's abuse address is the right place to report malicious traffic from an IP.
Frequently asked questions
Who an IP address is registered to and how it is routed: the network name and owner organization from the regional internet registry, the address range (CIDR block) it belongs to, its country, the autonomous system (ASN) that announces it on the internet, and its reverse DNS name.
IPs that look up as real ISPs
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