
12129 123NET, US
Adjacency: 104 Upstream: 11 Downstream: 93
Upstream Adjacent AS list
AS11115 ONLINE-TECH-LLC, US
AS174 COGENT-174, US
AS36394 ASN-GRID4-GATEWAYS, US
AS2914 NTT-LTD-2914, US
AS6461 ZAYO-6461, US
AS6939 HURRICANE, US
AS6453 AS6453, US
AS1299 TWELVE99 Arelion, fka Telia Carrier, SE
AS3257 GTT-BACKBONE GTT, US
AS396998 PATH-NETWORK, US
AS3356 LEVEL3, US
Downstream Adjacent AS list
AS14537 CL-1379-14537, US
AS394289 HOPE-COLLEGE, US
AS46208 PFNL-ASN, US
AS19755 CRUISE-NETENG-ASN, US
AS212132 EG-AS, LV
AS64223 MITCON, US
AS19239 KLA, US
AS21527 DAYSTARR-NET, US
AS394398 CFSMI-HQ, US
AS54373 MESSAGEEXPRESSINTERNET, US
AS8134 UP-NET, US
AS1021 CVTECH1, US
AS12088 NABANCARD, US
AS11285 KW-CORPORATION, US
AS14374 AGRI-VALLEY, US
AS13737 AS-INCX, US
AS22802 AMERISURE, US
AS393665 BAKERS, US
AS399593 DWIHN-ASN-01, US
AS399293 HOLASN, US
AS46492 SWMICH-EDU-AS-01, US
AS40956 NORTHWOOD-UNIVERSITY, US
AS53352 HFHS-ASN, US
AS14711 BRKTOOLS, US
AS398085 IHA-01, US
AS398226 HENNIGES-AUTOMOTIVE-NETWORK, US
AS32002 SNAKECRAFT-HOSTING-LLC, US
AS54840 UWM, US
AS394160 DRARS, US
AS399308 UFP-GR, US
AS397678 RRIS-01, US
AS40599 GENTEXCORPORATION, US
AS54542 K-DATA01, US
AS40234 RAPIDPARTS, US
AS40089 BULLHORN-INC-BOSTON, US
AS394952 LMCU-ASN-01, US
AS10423 SPARTAN-NET, US
AS393474 SCCRESA, US
AS397085 SIG, US
AS46569 WALSH-COLLEGE, US
AS1074 PRODUCTION-NETWORKS, US
AS11115 ONLINE-TECH-LLC, US
AS14938 BET-AS, US
AS16939 CARETECH-SOLUTIONS, US
AS16556 TOTALCHOICE-HOSTING, US
AS17143 WINNTELECOM, US
AS15154 SBBSNET, US
AS13549 MERCURY, US
AS19031 WESCO, US
AS19224 QSGIT, US
AS19131 LIVESS-01, US
AS2015 MSEN-SYSTEM, US
AS22379 MANIFOLD, US
AS26109 L-PERRIGO-GLOBAL, US
AS22941 AS-NOCMGT-01, US
AS22878 ASACENET1, US
AS22585 VIPCO, US
AS31923 THE-AUTO-CLUB-GROUP-ASN-1, US
AS27216 AIR-ADVANTAGE-ASN, US
AS32605 BRAVESOFT-AS, US
AS33488 WATECH-1, US
AS36349 3ESSENTIALS, US
AS36197 COMPUTER-DATA-INC, US
AS394004 HURLEY-MEDICAL-ASN, US
AS393256 DTE-ASN, US
AS36127 MCPS, US
AS3389 FORDSRL-AS, US
AS33418 EQUITABLE-INTERNET-INITATIVE, US
AS32477 ONLINE-TECH-LLC2, US
AS398233 RURALREACH-01, US
AS395813 MICHIGAN-CENTRAL, US
AS394960 WORKSIGHTED, US
AS398953 ABC-WAREHOUSE, US
AS399741 BN-AS-01, US
AS401313 NOVACOAST, US
AS53505 DRCFA, US
AS54163 AHOSTING, US
AS54932 M3-WIRELESS, US
AS54178 USAI-NA-01, US
AS53263 GRCC-AS1, US
AS5740 WORKFORCE, US
AS55269 CST, US
AS401307 MISEN-ASN-1, US
AS62611 CEC-AS-NB-4080, US
AS63126 AS-APTIENT, CA
AS62606 SECTOR7LLC, US
AS5758 MICHIGAN-BROADBAND, US
AS398351 MAYMOBILITY, US
AS267 NETHER-NET, US
AS215129 THOMAS-WODAREK, US
AS19901 BRSPD-PUBLIC, US
AS397282 CASTLEVPN, US
AS401215 MPS-MP, US
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 1414 AS12129 ORG+TRN Originate: 182784 /14.52 Transit: 382976 /13.45 123NET, US
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 4302 AS12129 123NET, US 53 14 2 41 12 22.64% Prefix AS Path Aggregation Suggestion 37.221.109.0/24 3257 12129 65.183.160.0/19 3257 12129 66.51.144.0/20 3257 12129 66.54.96.0/22 3257 12129 66.103.224.0/19 3257 12129 67.214.112.0/20 3257 12129 69.39.64.0/19 3257 12129 69.54.68.0/23 3257 12129 + Announce - aggregate of 69.54.68.0/24 (3257 12129) and 69.54.69.0/24 (3257 12129) 69.54.68.0/24 3257 12129 - Withdrawn - aggregated with 69.54.69.0/24 (3257 12129) 69.54.69.0/24 3257 12129 - Withdrawn - aggregated with 69.54.68.0/24 (3257 12129) 69.87.152.0/24 3257 12129 74.126.0.0/19 3257 12129 74.126.12.0/24 3257 12129 - Withdrawn - matching aggregate 74.126.0.0/19 3257 12129 130.44.28.0/22 3257 12129 130.51.212.0/22 3257 12129 147.189.140.0/24 3257 12129 149.19.205.0/24 3257 12129 152.160.0.0/17 3257 12129 152.160.110.0/24 3257 396998 12129 152.160.128.0/18 3257 12129 152.160.140.0/22 3257 12129 - Withdrawn - matching aggregate 152.160.128.0/18 3257 12129 152.160.144.0/22 3257 12129 - Withdrawn - matching aggregate 152.160.128.0/18 3257 12129 152.160.160.0/20 3257 12129 - Withdrawn - matching aggregate 152.160.128.0/18 3257 12129 152.160.184.0/21 3257 12129 - Withdrawn - matching aggregate 152.160.128.0/18 3257 12129 176.111.221.0/24 3257 12129 181.214.238.0/23 3257 12129 192.96.208.0/20 3257 12129 192.149.240.0/24 3257 12129 192.153.192.0/24 3257 12129 192.159.68.0/23 3257 12129 198.3.44.0/22 3257 12129 + Announce - aggregate of 198.3.44.0/23 (3257 12129) and 198.3.46.0/23 (3257 12129) 198.3.44.0/24 3257 12129 - Withdrawn - aggregated with 198.3.45.0/24 (3257 12129) 198.3.45.0/24 3257 12129 - Withdrawn - aggregated with 198.3.44.0/24 (3257 12129) 198.3.46.0/24 3257 12129 - Withdrawn - aggregated with 198.3.47.0/24 (3257 12129) 198.3.47.0/24 3257 12129 - Withdrawn - aggregated with 198.3.46.0/24 (3257 12129) 198.153.129.0/24 3257 12129 199.33.234.0/23 3257 12129 199.167.252.0/22 3257 12129 199.231.52.0/22 3257 12129 199.249.0.0/21 3257 12129 204.106.17.0/24 3257 12129 204.232.80.0/20 3257 12129 205.251.176.0/20 3257 12129 207.91.192.0/18 3257 12129 207.91.200.0/21 3257 12129 - Withdrawn - matching aggregate 207.91.192.0/18 3257 12129 207.91.232.0/21 3257 12129 - Withdrawn - matching aggregate 207.91.192.0/18 3257 12129 208.86.112.0/24 3257 12129 209.103.128.0/20 3257 12129 209.124.32.0/19 3257 12129 209.124.52.0/23 57866 3356 12129 209.124.56.0/22 3257 12129 - Withdrawn - matching aggregate 209.124.32.0/19 3257 12129 209.131.0.0/19 3257 12129 216.109.192.0/20 3257 12129 216.150.224.0/20 3257 12129 216.234.96.0/19 3257 12129
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS12129 25 More Specifics 54 Total Advertisements 123NET, US
37.221.109.0/24 37.221.108.0/22
69.54.68.0/24 69.54.64.0/19
69.54.69.0/24 69.54.64.0/19
69.87.152.0/24 69.87.128.0/19
147.189.140.0/24 147.189.128.0/20
152.160.0.0/17 152.160.0.0/16
152.160.110.0/24 152.160.0.0/16
152.160.128.0/18 152.160.0.0/16
152.160.140.0/22 152.160.0.0/16
152.160.144.0/22 152.160.0.0/16
152.160.160.0/20 152.160.0.0/16
152.160.184.0/21 152.160.0.0/16
176.111.221.0/24 176.111.216.0/21
181.214.238.0/23 181.214.0.0/15
198.3.44.0/24 198.3.0.0/17
198.3.45.0/24 198.3.0.0/17
198.3.46.0/24 198.3.0.0/17
198.3.47.0/24 198.3.0.0/17
199.167.253.0/24 199.167.252.0/22
199.167.254.0/23 199.167.252.0/22
205.137.160.0/24 205.137.160.0/20
207.91.232.0/21 207.91.192.0/18
209.103.128.0/20 209.103.128.0/19
209.124.52.0/23 209.124.32.0/19
209.124.56.0/22 209.124.32.0/19
74.126.12.0/24 74.126.0.0/19
206.168.80.0/24 206.168.80.0/22
Prefixes added and withdrawn by this origin AS in the past 7 days.
- 74.126.12.0/24 Withdrawn
- 206.168.80.0/24 Withdrawn
whois: 402603
IANA has recorded AS12129 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS12129\n
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
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# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
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ASNumber: 12129
ASName: 123NET
ASHandle: AS12129
RegDate: 1999-03-30
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/12129
OrgName: 123.Net, Inc.
OrgId: NETIN-6
Address: 24700 Northwestern Hwy. STE 700
City: Southfield
StateProv: MI
PostalCode: 48075
Country: US
RegDate: 2010-11-19
Updated: 2017-01-28
Comment: Direct Abuse: +1.248.228.8200 or abuse@123.net
Ref: https://rdap.arin.net/registry/entity/NETIN-6
OrgAbuseHandle: RD1464-ARIN
OrgAbuseName: Duda, Ryan
OrgAbusePhone: +1-248-228-8200
OrgAbuseEmail: rpd@123.net
OrgAbuseRef: https://rdap.arin.net/registry/entity/RD1464-ARIN
OrgTechHandle: JNO80-ARIN
OrgTechName: Nowlan, James
OrgTechPhone: +1-248-228-8200
OrgTechEmail: jnowlan@123.net
OrgTechRef: https://rdap.arin.net/registry/entity/JNO80-ARIN
OrgNOCHandle: RD1464-ARIN
OrgNOCName: Duda, Ryan
OrgNOCPhone: +1-248-228-8200
OrgNOCEmail: rpd@123.net
OrgNOCRef: https://rdap.arin.net/registry/entity/RD1464-ARIN
OrgTechHandle: RD1464-ARIN
OrgTechName: Duda, Ryan
OrgTechPhone: +1-248-228-8200
OrgTechEmail: rpd@123.net
OrgTechRef: https://rdap.arin.net/registry/entity/RD1464-ARIN
#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#