---
title: ip.src.asnum
description: The 16-bit or 32-bit integer representing the Autonomous System (AS) number associated with the client IP address.
image: https://developers.cloudflare.com/core-services-preview.png
---

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#  ip.src.asnum 

`ip.src.asnum` ` Number ` 

The 16-bit or 32-bit integer representing the Autonomous System (AS) number associated with the client IP address.

This field has the same value as the `ip.geoip.asnum` field, which is deprecated. The `ip.geoip.asnum` field is still available for new and existing rules, but you should use the `ip.src.asnum` field instead.

_GeoIP is the registered trademark of MaxMind, Inc._

Categories: 
* Request
* Geolocation

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