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netbox/docs/models/ipam/asn.md
Arthur Hanson e3d9fe622d Fix #17654: Add Role to ASN (#21582)
Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Jason Novinger <jnovinger@gmail.com>
Closes #21571: Bump minimatch and markdown-it to resolve security alerts (#21573)
2026-03-10 10:00:28 -05:00

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ASNs

An Autonomous System Number (ASN) is a numeric identifier used in the Border Gateway Protocol (BGP) to identify which autonomous system a particular prefix is originating from or transiting through. NetBox supports both 16- and 32-bit ASNs.

ASNs must be globally unique within NetBox, and may be allocated from within a defined range. Each ASN may be assigned to multiple sites.

Fields

AS Number

The 16- or 32-bit AS number.

RIR

The Regional Internet Registry or similar authority responsible for the allocation of this particular ASN.

Role

The user-defined functional role assigned to this ASN.

Sites

The site(s) to which this ASN is assigned.