AS10010 — TOKAI TOKAI Communications Corporation

Network type: residential

AS10010 announces 116 IPv4 prefixes covering 1,502,208 addresses and 4 IPv6 prefixes.

About this network

TOKAI is TOKAI Communications Corporation, the telecom subsidiary of TOKAI Holdings, headquartered in Shizuoka City. It is the ISP behind the nationwide @T COM brand and the Shizuoka-local TNC (TOKAI Network Club) brand, and it grew out of a cable-TV business, which is still part of the group.

What it's used for

Consumer and small-business broadband. The AS announces 187 IPv4 prefixes totalling roughly 1,503,000 addresses and 7 IPv6 prefixes — a very large pool of access space, mostly in /16s and /17s. Every sampled address lands in a subscriber pool: 5.net042126000.t-com.ne.jp and p005.net182020128.tnc.ne.jp bake the customer's IPv4 address into the hostname, which is what CPE naming looks like at scale, and both zones are the operator's own retail brands.

Notable

An eyeball network, and one of the larger regional ones in Japan. The decisive evidence is the ratio: 1.5 million addresses against only 63 observed BGP neighbours. A wholesale carrier holding that much space would peer with hundreds to thousands of ASes; a retail ISP buys transit from a few upstreams and peers at a couple of exchanges. Geolocate this space to Japanese households, concentrated in Shizuoka and the wider Tokai region but present nationally through @T COM.

Interesting

The sample also turns up sbtmwan-128.5.dws.ne.jp and i2059133.icntv.ne.jp — other operators' zones inside TOKAI's announced space. TOKAI sells wholesale connectivity and CATV-ISP services to smaller cable companies, so some of these addresses front third-party retail brands rather than @T COM directly.

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

Announced prefixes

• 27.98.0.0/17
• 27.98.128.0/18
• 27.121.0.0/18
• 42.124.0.0/16
• 42.125.0.0/17
• 42.125.128.0/18
• 42.125.192.0/19
• 42.125.225.0/24
• 42.125.226.0/23
• 42.125.228.0/22
• 42.125.232.0/21
• 42.125.240.0/21
• 42.125.248.0/23
• 42.125.251.0/24
• 42.125.252.0/22
• 42.126.0.0/15
• 43.224.28.0/24
• 45.90.85.0/24
• 45.90.86.0/23
• 45.120.79.0/24
• 45.251.132.0/22
• 59.84.0.0/15
• 59.86.0.0/17
• 59.86.128.0/19
• 61.120.224.0/19
• 61.198.96.0/19
• 61.200.96.0/19
• 61.206.64.0/20
• 61.211.176.0/20
• 61.211.192.0/19
• 91.200.58.0/24
• 94.74.184.0/23
• 103.4.68.0/22
• 103.26.34.0/24
• 103.37.10.0/23
• 103.41.60.0/24
• 103.41.240.0/22
• 103.50.90.0/24
• 103.51.80.0/22
• 103.54.47.0/24
• 103.97.208.0/24
• 103.136.196.0/22
• 103.217.136.0/23
• 103.239.92.0/22
• 103.239.216.0/22
• 110.172.56.0/21
• 111.67.112.0/20
• 112.137.192.0/18
• 112.138.0.0/15
• 112.140.0.0/19
• 116.68.217.0/24
• 116.68.218.0/23
• 116.68.220.0/22
• 116.254.0.0/18
• 116.254.64.0/19
• 117.104.0.0/18
• 118.151.192.0/20
• 119.83.0.0/16
• 120.136.192.0/18
• 120.137.128.0/17
• 124.47.192.0/18
• 133.186.0.0/20
• 133.186.32.0/20
• 133.186.48.0/22
• 133.225.214.0/24
• 150.38.0.0/16
• 150.96.0.0/24
• 158.201.125.0/24
• 164.162.0.0/22
• 164.162.4.0/23
• 164.162.8.0/21
• 164.162.17.0/24
• 164.162.18.0/23
• 164.162.20.0/22
• 164.162.24.0/21
• 164.162.32.0/19
• 164.162.64.0/18
• 164.162.128.0/17
• 180.149.204.0/22
• 180.233.96.0/20
• 182.20.0.0/15
• 183.86.0.0/17
• 183.86.128.0/18
• 183.182.160.0/24
• 183.182.162.0/24
• 193.151.111.0/24
• 194.87.225.0/24
• 202.136.192.0/20
• 202.208.192.0/19
• 202.216.27.0/24
• 202.216.76.0/23
• 202.216.79.0/24
• 202.222.0.0/22
• 202.222.4.0/23
• 202.226.16.0/22
• 203.95.32.0/19
• 203.114.228.0/22
• 203.171.212.0/22
• 210.4.240.0/20
• 210.146.96.0/19

and 20 more.

Upstream networks

• AS174 Cogent Communications, LLC
• AS6939 Hurricane Electric LLC
• AS2518 BIGLOBE Inc.
• AS1299 Arelion Sweden AB
• AS2497 Internet Initiative Japan Inc.
• AS4637 Telstra Global
• AS17676 SoftBank Corp.
• AS24482 SG.GS
• AS20485 Joint Stock Company TransTeleCom
• AS17639 Converge ICT Solutions Inc.
• AS38001 NewMedia Express Pte Ltd

Downstream networks

• AS23791 LCV Corporation
• AS131939 IPS INC
• AS17953 BroadBand Security, Inc.
• AS131915 Hamamatsu Cable Television .Inc
• AS146969 SoftBank Corp.
• AS9351 ZTV CO.,LTD
• AS23795 Fitec Corp.
• AS17678 Gunma Internet Co,.ltd
• AS23785 SUN FIELD INTERNET LIMITED
• AS4678 Canon IT Solutions Inc.
• AS23836 RELATION Co., Ltd.
• AS63805 Ryobi Systems Co., Ltd.
• AS7690 Mirai Communication Network Inc.
• AS131946 MUSASHINO UNIVERSITY E.F.
• AS23642 OBIS
• AS133780 Quantum Mesh Co.,Ltd.
• AS55385 Digital Alliance Co.,Ltd.
• AS23639 NTT Bizlink, Inc.
• AS17683 Wingtechnology Communications, Inc.
• AS24257 Japan Internet Xing Co., Ltd.
• AS63779 InfiniCloud Co. Ltd.
• AS38642 Yoshizou XYZ Solutions
• AS9990 Nippon Information and Communication Corporation
• AS131940 Nissho Electronics Corp.
• AS132504 QUALITIA Co.,Ltd

Adjacent networks

• AS174 Cogent Communications, LLC
• AS1299 Arelion Sweden AB
• AS4637 Telstra Global
• AS2497 Internet Initiative Japan Inc.
• AS6939 Hurricane Electric LLC
• AS2518 BIGLOBE Inc.
• AS17676 SoftBank Corp.
• AS59103 SoftEther Corporation
• AS23642 OBIS
• AS23791 LCV Corporation
• AS131939 IPS INC
• AS17953 BroadBand Security, Inc.
• AS24482 SG.GS
• AS131915 Hamamatsu Cable Television .Inc
• AS20485 Joint Stock Company TransTeleCom
• AS17639 Converge ICT Solutions Inc.
• AS146969 SoftBank Corp.
• AS9351 ZTV CO.,LTD
• AS23795 Fitec Corp.
• AS17683 Wingtechnology Communications, Inc.
• AS17678 Gunma Internet Co,.ltd
• AS23785 SUN FIELD INTERNET LIMITED
• AS7690 Mirai Communication Network Inc.
• AS4678 Canon IT Solutions Inc.
• AS23836 RELATION Co., Ltd.

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Osaka — Osaka, Japan
• Equinix Internet Exchange Tokyo — Tokyo, Japan
• JPIX Osaka — Osaka, Japan