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How to Find Autonomous System (AS) Number by IP

Autonomous System (AS) is a term that refers to a group of gateways (routers) that are in the same administrative control, that is, belong to the same organization.

This service shows which Autonomous System the entered address belongs to, as well as the address range to which the IP you are interested in belongs.

Instead of IP, you can specify a hostname, for example, the domain of a website.

The autonomous system number will be shown in the “origin:” line, it will look like AS*****. The “descr:” line will show the name of the autonomous system. Other additional information may be displayed depending on the AS.


  • volga-it.org

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