The Autonomous System Number identifies the network that announces the IP range.
IP tool
IP address lookup
Inspect an IPv4 or IPv6 address using local GeoIP and ASN data, plus reverse DNS.
Quick guide
What an IP lookup tells you
An IP address identifies a network endpoint on the internet. A lookup can tell you whether it is IPv4 or IPv6, which network announces it, and the approximate geography associated with the address block.
Location data is approximate. It usually identifies an ISP network area, not a precise device or home address.
A PTR record may map the IP address back to a hostname, but not every address has one.
Country, region and city are inferred from an IP database and should be treated as approximate.
IPGetter validates the address, checks its address family and scope, looks up ASN and GeoIP data from local databases, then attempts a reverse-DNS lookup.
- Investigating an unfamiliar public IP
- Finding the network or ASN behind an address
- Checking approximate country, region or city data
Terminal shortcut
Prefer the command line?
Run an IP lookup without leaving the keyboard.
> lookup 8.8.8.8
Run in Terminal ->