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An Autonomous System Number (ASN) is a numeric identifier used in the BGP protocol to identify which autonomous system a particular prefix is originating and transiting through. NetBox support both 32- and 64- 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.


AS Number

The 32- or 64-bit AS number.


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


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