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.

Sites

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