AS12129 — 123NET

Network type: hosting

AS12129 announces 80 IPv4 prefixes covering 162,560 addresses and 3 IPv6 prefixes.

About this network

123NET is a Michigan network operator running fiber, colocation and transit out of the Detroit metro area.

What it's used for

• Business fiber, dedicated internet access and colocation. The reverse DNS is almost entirely static.123.net, which is what statically assigned business space looks like rather than a residential access plant.

Notable

• 111 observed BGP neighbours against 164,000 addresses. That inverts the usual eyeball ratio and marks this as a peering-heavy network — an operator whose value is who it connects to, not how many subscribers it holds.
• 123NET runs the Detroit-area internet exchange, which is the direct explanation for a neighbour count that large on a network this size.

Interesting

• Several of the announced blocks are registered to other companies, including 2020 Communications and Sectorlink. On a colocation and transit network that is the expected pattern: customers bring their own ARIN assignments and have them announced, so the registry reads as a list of tenants rather than a single owner.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 65.183.160.0/21
• 65.183.168.0/22
• 65.183.173.0/24
• 65.183.174.0/23
• 65.183.176.0/20
• 66.51.144.0/22
• 66.51.149.0/24
• 66.51.150.0/24
• 66.51.152.0/21
• 66.103.224.0/20
• 66.103.240.0/22
• 66.103.245.0/24
• 66.103.246.0/23
• 66.103.248.0/21
• 67.214.112.0/23
• 67.214.115.0/24
• 67.214.116.0/23
• 67.214.118.0/24
• 67.214.120.0/21
• 69.39.64.0/19
• 69.54.68.0/23
• 74.126.0.0/20
• 74.126.17.0/24
• 74.126.18.0/23
• 74.126.20.0/22
• 74.126.24.0/21
• 130.44.28.0/22
• 130.51.212.0/22
• 149.19.205.0/24
• 152.160.0.0/18
• 152.160.64.0/20
• 152.160.80.0/23
• 152.160.82.0/24
• 152.160.84.0/22
• 152.160.88.0/21
• 152.160.96.0/19
• 152.160.128.0/20
• 152.160.144.0/24
• 152.160.146.0/23
• 152.160.148.0/22
• 152.160.152.0/21
• 152.160.160.0/20
• 152.160.176.0/22
• 152.160.181.0/24
• 152.160.182.0/23
• 152.160.184.0/21
• 192.96.208.0/20
• 192.149.240.0/24
• 192.153.192.0/24
• 192.159.68.0/23
• 198.3.44.0/22
• 198.153.129.0/24
• 199.33.234.0/23
• 199.167.252.0/22
• 199.231.52.0/22
• 199.249.0.0/21
• 204.106.17.0/24
• 204.232.80.0/20
• 205.251.176.0/20
• 207.91.193.0/24
• 207.91.194.0/23
• 207.91.196.0/22
• 207.91.200.0/21
• 207.91.208.0/20
• 207.91.224.0/19
• 208.86.112.0/24
• 209.103.128.0/20
• 209.124.32.0/22
• 209.124.36.0/23
• 209.124.38.0/24
• 209.124.40.0/21
• 209.124.48.0/20
• 209.131.0.0/19
• 216.109.192.0/20
• 216.150.224.0/20
• 216.234.96.0/20
• 216.234.112.0/23
• 216.234.114.0/24
• 216.234.116.0/22
• 216.234.120.0/21
• 2607:f790::/32
• 2620:84:c000::/48
• 2620:11f:7008::/48

Upstream networks

• AS6939 Hurricane Electric LLC
• AS1299 Arelion Sweden AB
• AS6461 Zayo Bandwidth
• AS174 Cogent Communications, LLC
• AS3356 Level 3 Parent, LLC
• AS2914 NTT America, Inc.
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS3257 GTT Communications Inc.
• AS396998 Path Network, Inc.
• AS20205 Amplex Electric, Inc.

Downstream networks

• AS27216 Air Advantage LLC
• AS14938 Bullseye Telecom
• AS401307 Michigan Statewide Educational Network
• AS22379 Manifold Services Inc
• AS32477 Otava, LLC
• AS21527 Daystarr Communications
• AS19901 Brightspeed
• AS11115 Otava, LLC
• AS54932 M3 Wireless Inc.
• AS393474 St. Clair County Regional Educational Service Agency
• AS19224 Quantum Services Group, LLC.
• AS17143 Winn Telecom
• AS2015 Msen, Inc.
• AS393256 DTE Energy Company
• AS14374 Agri-Valley Services Corporation
• AS19031 CU*Answers, Inc.
• AS16939 CARETECH SOLUTIONS INC
• AS267 Nether.Net
• AS22878 ACENET, INC.
• AS54178 Urban Science Applications, Inc.
• AS15154 Network Services Group
• AS13737 Interconnecx, LLC
• AS54840 United Wholesale Mortgage, LLC
• AS36349 3Essentials Inc.
• AS8134 Baraga Telephone Company

Adjacent networks

• AS6939 Hurricane Electric LLC
• AS401307 Michigan Statewide Educational Network
• AS27216 Air Advantage LLC
• AS6461 Zayo Bandwidth
• AS14938 Bullseye Telecom
• AS6453 TATA COMMUNICATIONS (AMERICA) INC
• AS1299 Arelion Sweden AB
• AS174 Cogent Communications, LLC
• AS2914 NTT America, Inc.
• AS21527 Daystarr Communications
• AS22379 Manifold Services Inc
• AS32477 Otava, LLC
• AS3257 GTT Communications Inc.
• AS3356 Level 3 Parent, LLC
• AS19901 Brightspeed
• AS11115 Otava, LLC
• AS17143 Winn Telecom
• AS54932 M3 Wireless Inc.
• AS393474 St. Clair County Regional Educational Service Agency
• AS19224 Quantum Services Group, LLC.
• AS2015 Msen, Inc.
• AS20205 Amplex Electric, Inc.
• AS393256 DTE Energy Company
• AS14374 Agri-Valley Services Corporation
• AS19031 CU*Answers, Inc.

Internet exchanges

• Equinix Internet Exchange Ashburn — Ashburn, United States
• Equinix Internet Exchange Chicago — Chicago, United States
• Detroit Internet Exchange — Detroit, United States