ResearchIRR · LEVEL3

AS-I123 transit ASes for 123.net

An as-set registered in LEVEL3, maintained by I123-MNT. It names 197 ASes and 4 sets directly; followed all the way down, it reaches 2,087 ASes through 233 nested sets.

Members

What AS-I123 lists

197 ASes and 4 sets, written in the object across every registry that holds it. Sets open their own page.

AS-APTIENTAS-GOLIGHTSPEEDAS-MISENAS-SPARTANAS267 NETHER-NETAS931 HYONIXAS1021 CVTECH1AS1074 PRODUCTION-NETWORKSAS1638 MCC-CAMPUSAS1975 PROQUEST-ASAS2015 MSEN-SYSTEMAS3389 FORDSRL-ASAS4471 GRANDRAPIDS-INTERNET-EXCHANGEAS4595 2020-4595AS5740 WORKFORCEAS5758 MICHIGAN-BROADBANDAS7770 TRITONAS7949 DETROIT-INTERNET-EXCHANGEAS8134 UP-NETAS8180 EDGENIX-ASAS10423 SPARTAN-NETAS10915AS11115 ONLINE-TECH-LLCAS11285 KW-CORPORATIONAS11541 AIR-ADVANTAGE-ASN2AS11597 MW-KANSASAS12088 NABANCARDAS12129 123NETAS13549 MERCURYAS13737 AS-INCXAS13828 I2KAS14257 EZ-NETAS14374 AGRI-VALLEYAS14711 BRKTOOLSAS14842 BAUD-AS01AS14938 BET-ASAS15144 XYMMETRIX-XYMMETRIX-LLCAS15154 SBBSNETAS15342 DDPMI-1AS16556 TOTALCHOICE-HOSTINGAS16613 SYNERGYBROADBAND-IL-01AS16792 VWNA-AS1AS16939 CARETECH-SOLUTIONSAS17143 WINNTELECOMAS18529 PLEXUS-SYSTEMS-US3AS19031 WESCOAS19131 LIVESS-01AS19224 QSGITAS19239 KLAAS19257 SUBRIGOAS19310 CASAIRAS19584 DATACAMO-LOSANGELESAS19748 SECTORLINKAS19755 CRUISE-NETENG-ASNAS19872 CUSTOM-76AS19901 BRIGHTSPEEDAS20052 ARBORAS20101 MICHWAVEAS20471 MICHAELAS20940 AKAMAI-ASN1
Show 141 more
AS21527 DAYSTARR-NETAS21711 MAXTEL-USA-01AS21973 XPONETAS22118AS22379 MANIFOLDAS22526 ITC-ASNAS22585 MVS-CLOUDAS22768 SYNERGYBROADBAND-MI-02AS22802 AMERISUREAS22861 CAMP-COMM-SERVICESAS22878 ASACENET1AS22879 SIRUS-AS2AS22941 AS-NOCMGT-01AS26109 L-PERRIGO-GLOBALAS26174 SVSUAS26216 INVISALINKWIRELESSMIAS26271 CMSINTERNETAS26330 AVFUEL-CORPORATIONAS26339 JAS-NETWORKS-INCAS26364 RDV-CORPAS26696 MINTO-COMMUNICATIONS-SOCIETYAS26838 MAGNANETAS26856 AUTODATA-SOLUTIONS-COMPANYAS27192 COLI-NETAS27216 AIR-ADVANTAGE-ASNAS27287 SECANTNETAS27553 TELNETAS30242 SAMSAAS30382 IPTELXAS30383 GENERAL-MOTORS-CORPORATIONAS30457AS31832 ASN-MDTAS31923 THE-AUTO-CLUB-GROUP-ASN-1AS32002 RACKGENIUSAS32477 ONLINE-TECH-LLC2AS32671 LEANLOGISTICSAS33414 KENTCOUNTYMIAS33418 EQUITABLE-INTERNET-INITATIVEAS33450 EM-ASN-01AS33488 WATECH-1AS33539 ISP-MANAGEMENTAS36113 UTL-42-36113AS36127 MCPSAS36197 COMPUTER-DATA-INCAS36349 3ESSENTIALSAS36444 NEXCESS-NETAS40044 BRONSON-HEALTHCARE-GROUP-INCAS40089 BULLHORN-INC-BOSTONAS40234 RAPIDPARTSAS40599 GENTEXCORPORATIONAS40684 STCLAIRCCC-ASAS40720 PORTLANDAS40785 AS-OMNIVA-NJDCAS40956 NORTHWOOD-UNIVERSITYAS41264 GOOGLE-IT-RO-ISPAS46137 AAA-MWG-IOAS46143AS46208 PFNL-ASNAS46241 WASHTENAW-ISD-ASNAS46492 SWMICH-EDU-AS-01AS46569 WALSH-COLLEGEAS46588 CDW-CONFIGS-01AS46670 MARKETING-ASSOCIATES-LLCAS46683 MI-TECHAS46707 MAGNA-HOLLANDAS46873 HOSTCOLORAS46925 PAVLOVMEDIA-SEAS47018 CE-BGPACAS53263 GRCC-AS1AS53352 HFHS-ASNAS53505 DRCFAAS53899 SERVICEHUBAS54103 MODMC-54103-ASAS54163 AHOSTINGAS54178 USAI-NA-01AS54373 MESSAGEEXPRESSINTERNETAS54542 K-DATA01AS54840 UWMAS54932 M3-WIRELESSAS55138 PBXSYSTEMSAS55227 COREDATACENTRESAS55234 PLEXUSSYSTEMS-US2AS55269 CSTAS55293 A2HOSTINGAS62588 ASGDCAS62601 XPERTTECHAS62606 SECTOR7LLCAS62611 CEC-AS-NB-4080AS62968 AS-CMCAS63133 LENNON-1AS63242 AS-CMN-LSAS63293 FACEBOOK-OFFNETAS64223 MITCONAS64242AS197900 NBTI-NETWORKSAS201392 Team-Inverse-LLCAS201726 APALRD-ASNAS212132 EG-ASAS212935 THEORIAS215129 WPL-133-215129AS393256 DTE-ASNAS393474 SCCRESAAS393483 YEO-YEOAS393640 ONLINE-TECH-LLC-IN1AS393665 BAKERSAS393953 MERC-ASAS394004 HURLEY-MEDICAL-ASNAS394160 DRARSAS394289 HOPE-COLLEGEAS394398 CFSMI-HQAS394678 BPC-76-ASAS394769 UMF-7-ASAS394952 LMCU-ASN-01AS394960 WORKSIGHTEDAS395349 CLOUDSAFE-PROVIDERAS395813 MICHIGAN-CENTRALAS395945 HBPWAS396980 API-EGVDC-01AS397085 SIGUSAS397678 RRIS-01AS397816 MISIGNALAS398085 IHA-01AS398146 EMYPEOPLEAS398226 HENNIGES-AUTOMOTIVE-NETWORKAS398233 RURALREACH-01AS398351 MAYMOBILITYAS398483 SRS-PHARMACYAS398953 ABC-WAREHOUSEAS399293 HOLASNAS399308 UFP-GRAS399593 DWIHN-ASN-01AS399741 BN-AS-01AS399804 HOSTODOAS399836AS400067 BNP-ASNBLOCK-01AS401003AS401307 MISEN-ASN-1AS401313 NOVACOASTAS402050 GUARDIAN-ALARM-01AS402212 NICKTRONICITAS402385 SPICER-NETWORKS
Expanded

Every AS it reaches

What a filter built from AS-I123 would let in: 2,087 ASes.

Show the 2,087 ASes
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Prefixes

What AS-I123 covers

Every route object in the IRR whose origin is one of the 2,087 ASes it reaches: the prefixes a filter built from AS-I123 (with bgpq4, say) would allow. 101,026 IPv4 and 170,756 IPv6. Every one is in the IRR API.

101,026 IPv4 prefixesthe first 1,000 listed
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170,756 IPv6 prefixesthe first 1,000 listed
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Last modified2026-09-21T19:52:53Z
MembersAS-APTIENT AS-GOLIGHTSPEED AS-MISEN AS-SPARTAN AS1021 AS10423 AS1074 AS10915 AS11115 AS11285 AS11541 AS11597 AS12088 AS12129 AS13549 AS13737 AS13828 AS14257 AS14374 AS14711 AS14842 AS14938 AS15144 AS15154 AS15342 AS1638 AS16556 AS16613 AS16792 AS16939 AS17143 AS18529 AS19031 AS19131 AS19224 AS19239 AS19257 AS19310 AS19584 AS19748 AS1975 AS19755 AS197900 AS19872 AS19901 AS20052 AS20101 AS201392 AS2015 AS201726 AS20471 AS20940 AS212132 AS212935 AS215129 AS21527 AS21711 AS21973 AS22118 AS22379 AS22526 AS22585 AS22768 AS22802 AS22861 AS22878 AS22879 AS22941 AS26109 AS26174 AS26216 AS26271 AS26330 AS26339 AS26364 AS26696 AS267 AS26838 AS26856 AS27192 AS27216 AS27287 AS27553 AS30242 AS30382 AS30383 AS30457 AS31832 AS31923 AS32002 AS32477 AS32671 AS33414 AS33418 AS33450 AS33488 AS33539 AS3389 AS36113 AS36127 AS36197 AS36349 AS36444 AS393256 AS393474 AS393483 AS393640 AS393665 AS393953 AS394004 AS394160 AS394289 AS394398 AS394678 AS394769 AS394952 AS394960 AS395349 AS395813 AS395945 AS396980 AS397085 AS397678 AS397816 AS398085 AS398146 AS398226 AS398233 AS398351 AS398483 AS398953 AS399293 AS399308 AS399593 AS399741 AS399804 AS399836 AS400067 AS40044 AS40089 AS401003 AS401307 AS401313 AS402050 AS402212 AS40234 AS402385 AS40599 AS40684 AS40720 AS40785 AS40956 AS41264 AS4471 AS4595 AS46137 AS46143 AS46208 AS46241 AS46492 AS46569 AS46588 AS46670 AS46683 AS46707 AS46873 AS46925 AS47018 AS53263 AS53352 AS53505 AS53899 AS54103 AS54163 AS54178 AS54373 AS54542 AS54840 AS54932 AS55138 AS55227 AS55234 AS55269 AS55293 AS5740 AS5758 AS62588 AS62601 AS62606 AS62611 AS62968 AS63133 AS63242 AS63293 AS64223 AS64242 AS7770 AS7949 AS8134 AS8180 and 1 more
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Used by

Sets that include AS-I123

AS-4501AS-GLOBEINTERNET-CLIENTSAS-GTTCUSTAS-GTTCUST6AS-PREMIERAS-XFERNETAS1299:AS-TWELVE99-NA-V4AS1299:AS-TWELVE99-NA-V6AS2914:AS-USAS2914:AS-US-V6AS3491:AS-CUSTOMERS-NAAS396998:AS-CUSTOMERS-0
Tools

Check AS-I123 live

IRR API, with prefixes