Autonomous system
AS7668 HTCN Hokuriku Telecommunication Network Co.
Unclassified APNIC
Summary
Hokuriku Telecommunication Network Co. (HTNet)
isp residential eyeball legacy
HTCN is Hokuriku Telecommunication Network Co., Inc. (HTNet), the telecoms arm of the Hokuriku Electric Power group, headquartered in Kanazawa and serving Ishikawa, Toyama and Fukui prefectures on Japan's Sea of Japan coast.
What it's used for
- Around 29,700 addresses across nine prefixes, plus
2001:308::/32in IPv6. The company also runs a data centre in Kanazawa. - Reverse DNS shows subscriber addressing on the company's fibre brands:
NNN.191.250.210.hikari.fibernet.jpandNNN.96.213.202.ohmb.hikarinet.jpare sequentially numbered access pools, the classic shape of consumer and small-business broadband. - Other blocks carry corporate systems, including hosts in
rikuden.co.jp— the domain of parent Hokuriku Electric Power — and generichtcn.ne.jpmachines.
Notable
- An eyeball network with a business tail. Japan's regional electric utilities all spun up telecom subsidiaries in the 1990s, riding their own power-line fibre; HTNet is Hokuriku's, the same pattern as Enecom in Chugoku (AS7670), QTnet in Kyushu (AS7679) and HOTnet in Hokkaido (AS7682).
Interesting
- The utility-telecom model gave these companies a rights-of-way advantage no greenfield ISP could match: the fibre was already strung on the power poles. It is why several of Japan's regional broadband providers are, underneath, electricity companies.
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 5 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| JPIX Tokyo | Tokyo, Japan | 210.171.224.133 |
| BroadBand Internet eXchange Osaka | Osaka, Japan | 218.100.9.85 |
| Equinix Internet Exchange Tokyo | Tokyo, Japan | 203.190.230.16 |
| JPIX Osaka | Osaka, Japan | 103.246.232.133 |
| Network Service Provider IXP (Distributed IX in Edo) | Tokyo, Japan | 202.249.2.134 |
Transit providers
10 upstream, 5 downstream and 20 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 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 7 prefixes · 29.70K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 8 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS7668- Registry name
- HTCN
- Registered
- 1997-11-13
- Last changed
- 2010-07-13
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 90% valid · 9 valid, 1 with no ROA
- ROAs
- 9 authorising AS7668
- ASPA
- no ASPA record
- IRR
- 100% registered · 10 of 10 announcements
- Route objects
- 10 naming AS7668
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: 436 networks and 1,771 prefixes, as published 2026-10-13. 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