Autonomous System Number List

An autonomous system (AS) is a collection of connected Internet Protocol (IP) routing prefixes under the control of one or more network operators on behalf of a single administrative entity or domain, that presents a common and clearly defined routing policy to the Internet. Each AS is assigned a unique autonomous system number (ASN), for use in Border Gateway Protocol (BGP) routing.

AS numbers are assigned to Local Internet Registries (LIRs) and end user organizations by their respective Regional Internet Registries (RIRs), which in turn receive blocks of ASNs for reassignment from the Internet Assigned Numbers Authority (IANA). The IANA also maintains a registry of ASNs which are reserved for private use (and should therefore not be announced to the global Internet). The allocated AS numbers are defined as 16-bit and 32-bit integers. The length range of 16-bit is between 0 and 65535, and the length range of 32-bit is between 0 and 4294967294. At present, the 16-bit integers which allowed for a maximum of 65,536 assignments is mostly used.

AS Number AS Organization Country Code
AS357 DNIC-ASBLK-00306-00371 US (United States)
AS358 DNIC-ASBLK-00306-00371 US (United States)
AS359 DNIC-ASBLK-00306-00371 US (United States)
AS360 DNIC-ASBLK-00306-00371 US (United States)
AS361 DNIC-ASBLK-00306-00371 US (United States)
AS362 DNIC-ASBLK-00306-00371 US (United States)
AS364 DNIC-ASBLK-00306-00371 US (United States)
AS365 DNIC-ASBLK-00306-00371 US (United States)
AS366 DNIC-ASBLK-00306-00371 US (United States)
AS367 DNIC-ASBLK-00306-00371 US (United States)
AS368 DNIC-ASBLK-00306-00371 US (United States)
AS369 DNIC-ASBLK-00306-00371 US (United States)
AS370 DNIC-ASBLK-00306-00371 US (United States)
AS371 DNIC-ASBLK-00306-00371 US (United States)
AS372 AS372 US (United States)
AS375 Tieto Oyj FI (Finland)
AS376 RISQ-AS CA (Canada)
AS377 SNLA-NET-AS US (United States)
AS378 Israel InterUniversity Computation Center IL (Israel)
AS383 AFCONC-BLOCK1-AS US (United States)
AS385 AFCONC-BLOCK1-AS US (United States)
AS386 AFCONC-BLOCK1-AS US (United States)
AS391 AFCONC-BLOCK1-AS US (United States)
AS398 AFCONC-BLOCK1-AS US (United States)
AS399 AFCONC-BLOCK1-AS US (United States)
AS409 AFCONC-BLOCK1-AS US (United States)
AS427 AFCONC-BLOCK1-AS US (United States)
AS441 AFCONC-BLOCK1-AS US (United States)
AS450 AFCONC-BLOCK1-AS US (United States)
AS451 AFCONC-BLOCK1-AS US (United States)
AS456 AFCONC-BLOCK1-AS US (United States)
AS490 AFCONC-BLOCK1-AS US (United States)
AS500 AFCONC-BLOCK1-AS US (United States)
AS510 INTERNET US (United States)
AS511 SCOEC-ASN US (United States)
AS513 European Organization for Nuclear Research CH (Switzerland)
AS514 DSADC-MECH US (United States)
AS518 DNIC-AS-00518 US (United States)
AS523 DNIC-AS-00523 US (United States)
AS531 DNIC-AS-00531 US (United States)
AS542 ARNET CA (Canada)
AS543 HP-POLYCOM US (United States)
AS545 NRI US (United States)
AS546 PARSONS-PGS-1 US (United States)
AS549 GTANET-AS CA (Canada)
AS553 Universitaet Stuttgart DE (Germany)
AS555 VTSII US (United States)
AS557 UMAINE-SYS-AS US (United States)
AS559 SWITCH CH (Switzerland)
AS565 VTT Technical Research Centre of Finland Ltd FI (Finland)

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