AS7516 — TOHKNET TOHKnet Co.,Inc.

AS7516 announces 9 IPv4 prefixes covering 119,040 addresses and 1 IPv6 prefixes.

About this network

TOHKNET — TOHKnet Co., Inc. (Tohoku Intelligent Telecommunication), the telecom subsidiary of Tohoku Electric Power, based in Sendai. It runs its own fibre backbone across the Tohoku region and sells corporate connectivity and ICT services under the TOCN brand.

What it's used for

• Business internet access, private lines and ICT solutions for companies, local government and institutions in northern Honshu.
• TOHKnet's own network operations centre and service infrastructure (tocn.ne.jp).

Notable

• Despite ~119k IPv4 addresses, this is not an eyeball network. TOHKnet retired its consumer dial-up/ISDN service and has been corporate-facing since; the rDNS bears that out — there are no pppoe-, dsl- or pool- subscriber names.
• What you see instead across blocks like 218.216.112.0/20 is classless rDNS delegation (in-addr.arpa zones cut on /25 boundaries and handed to the customer). That pattern is a reliable B2B tell: each customer runs its own reverse zone for its own assigned block.
• Announces 150.30.0.0/16, a legacy class-B, alongside more recent APNIC ranges.

Interesting

• Like STNet (AS7522) in Shikoku, TOHKnet exists because a regional power utility already owned fibre along its transmission network and turned it into a telecom business. The two ended up in different markets: STNet went after consumers, TOHKnet stayed with enterprises.

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

Announced prefixes

• 150.30.0.0/16
• 202.254.152.0/24
• 210.175.192.0/19
• 210.239.0.0/19
• 211.2.128.0/19
• 211.10.64.0/19
• 211.120.96.0/19
• 218.216.112.0/20
• 219.109.128.0/19
• 2001:3c0::/35

Upstream networks

• AS2516 KDDI CORPORATION
• AS2914 NTT America, Inc.
• AS6939 Hurricane Electric LLC
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS38001 NewMedia Express Pte Ltd
• AS20485 Joint Stock Company TransTeleCom

Downstream networks

• AS131953 NPO Yutopianet

Adjacent networks

• AS2516 KDDI CORPORATION
• AS2914 NTT America, Inc.
• AS6939 Hurricane Electric LLC
• AS131953 NPO Yutopianet
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS38001 NewMedia Express Pte Ltd
• AS20485 Joint Stock Company TransTeleCom

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan