Autonomous system
AS7676 TAM TAM-Internet Service T.A.M Co., Ltd.
Residential RIPE
Summary
T.A.M Co., Ltd.
isp residential eyeball cable legacy
TAM is T.A.M Co., Ltd., a cable-television and internet operator based in Kamiichi, Toyama Prefecture. It runs its own ISP under the Tamnet name and provides internet service for cable-TV networks in the surrounding Namerikawa, Kamiichi and Tateyama area.
What it's used for
- Roughly 40,000 addresses across twenty-three prefixes, plus three IPv6
/32blocks. - Reverse DNS is cable-subscriber addressing almost everywhere, on several regional cable brands at once:
pc.NNN.NNN.NNN.NNN.nice-tv.jp,cNbNN-NNN.net3-tv.netandpc-NNN-NNN-NN-NN.milale.ne.jp. Thepc.prefix on customer-premises equipment is about as unambiguous an eyeball signal as reverse DNS gets. - The company also sells IP telephony and operates as a mobile virtual network operator.
Notable
- A residential network, and a genuinely small-town one. The name gives away nothing; the rDNS gives away everything. Addresses here should geolocate to towns in Toyama Prefecture, not to a corporate headquarters.
- Watch the address count: 40,000 addresses across twenty-three prefixes is a lot of blocks for a rural cable operator, because it aggregates the space of several separate community cable networks.
Interesting
- The Net3 cable business was a public-sector broadcaster until 2021, when T.A.M acquired its assets outright and privatised it — a late example of a Japanese municipal cable-TV association being handed to a commercial operator.
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
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-21, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 23 prefixes · 39.68K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 26 |
Registry
Allocation record
- Registry
- RIPE
- Handle
AS7676- Registry name
- TAM
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 1997-11-13
- Last changed
- 2025-10-23
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 26 with no ROA
- ROAs
- 0 authorising AS7676
- ASPA
- no ASPA record
- IRR
- 42% registered · 11 of 26 announcements 1 other origin
- Route objects
- 11 naming AS7676
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 442 networks and 1,779 prefixes, as published 2026-10-22. 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