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
AS174 COGENT-174 US (United States of America)
AS186 CUA-AS US (United States of America)
AS187 DNSCAST-AS US (United States of America)
AS188 SAIC-AS US (United States of America)
AS190 DNIC-AS-00190 US (United States of America)
AS194 NCAR-AS US (United States of America)
AS195 SDSC-AS US (United States of America)
AS196 BOEING196 US (United States of America)
AS200 CENTURYLINK-LEGACY-LVLT-200 US (United States of America)
AS202 CENTURYLINK-LEGACY-LVLT-202 US (United States of America)
AS203 CENTURYLINK-LEGACY-LVLT-203 US (United States of America)
AS205 MONTCLAIR-AS US (United States of America)
AS206 CSC-IGN-AMER-AS206 US (United States of America)
AS209 CENTURYLINK-US-LEGACY-QWEST US (United States of America)
AS210 WEST-NET-WEST US (United States of America)
AS213 DNIC-AS-00213 US (United States of America)
AS217 UMN-SYSTEM US (United States of America)
AS223 AS223 US (United States of America)
AS224 Kunnskapssektorens Tjenesteleverandor NO (Norway)
AS225 VIRGINIA-AS US (United States of America)
AS226 LOS-NETTOS-AS US (United States of America)
AS228 DNIC-AS-00228 US (United States of America)
AS229 MERIT-AS-6 US (United States of America)
AS231 MISU-231 US (United States of America)
AS237 MERIT-AS-14 US (United States of America)
AS239 UTORONTO-AS CA (Canada)
AS243 HARRIS-ATD-AS US (United States of America)
AS250 SACREDCHAO-AS AS250.net Foundation EU
AS252 DNIC-AS-00252 US (United States of America)
AS254 TWG-NET-AS US (United States of America)
AS257 DNIC-AS-00257 US (United States of America)
AS258 BRAGGSRI-EGP-AS US (United States of America)
AS260 GTT-DXB US (United States of America)
AS262 VERIO US (United States of America)
AS264 SRINET-AS US (United States of America)
AS267 NETHER-NET US (United States of America)
AS268 USUHSNET-AS US (United States of America)
AS270 AS270 US (United States of America)
AS271 BCNET-AS CA (Canada)
AS273 DNIC-AS-00273 US (United States of America)
AS275 NTTA-275 US (United States of America)
AS276 OTS-AS-276 US (United States of America)
AS278 Universidad Nacional Autonoma de Mexico MX (Mexico)
AS283 MPOWERLABS US (United States of America)
AS288 European Space Agency (ESA) DE (Germany)
AS289 DNIC-AS-00289 US (United States of America)
AS291 ESNET-EAST US (United States of America)
AS292 ESNET-WEST US (United States of America)
AS293 ESNET US (United States of America)
AS297 AS297 US (United States of America)

Pages

Languages