Autonomous system
AS7516 TOHKNET TOHKnet Co.,Inc.
Unclassified RIPE
Summary
TOHKnet
isp enterprise legacy
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-orpool-subscriber names. - What you see instead across blocks like
218.216.112.0/20is classless rDNS delegation (in-addr.arpazones 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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.89.143 |
| JPIX Tokyo | Tokyo, Japan | 210.171.224.156 |
Transit providers
7 upstream, 1 downstream and 12 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 9 prefixes · 119K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 10 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS7516- Registry name
- TOHKNET
- Registered
- 1997-03-03
- Last changed
- 2026-02-25
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 10 with no ROA
- ROAs
- 0 authorising AS7516
- ASPA
- no ASPA record
- IRR
- 100% registered · 10 of 10 announcements
- Route objects
- 14 naming AS7516
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 431 networks and 1,768 prefixes, as published 2026-10-12. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere