ASN Lookup Tool

Enter any IP address to find its Autonomous System Number (ASN), organization owner, country, and network details using IPinfo.io API

Tip: Enter any IP address to see its ASN information. For ASN lookup by number, use an IP from that ASN (e.g., AS15169 → 8.8.8.8).

Fetching ASN data from IPinfo.io...

ASN Information

Organization Details

What is an Autonomous System (AS)?

An Autonomous System (AS) is a large network or group of networks with a single unified routing policy. Each AS is assigned a unique ASN (Autonomous System Number) that identifies it on the internet. ASNs are essential for BGP (Border Gateway Protocol) routing between different networks.