Autonomous system
AS9365 ITSCOM its communications Inc.
Residential ARIN
Summary
iTSCOM (its communications Inc.)
isp residential legacy
AS9365 (ITSCOM) is held by its communications Inc., trading as iTSCOM — a cable television and broadband operator serving the Tokyu railway corridor in south-western Tokyo and Kanagawa Prefecture (Setagaya, Meguro, Kawasaki, Yokohama). It is part of the Tokyu group and is one of Japan's larger regional CATV/FTTH providers.
What it's used for
The routing evidence is textbook consumer access. RIS observes 14 IPv4 prefixes carrying 404,480 addresses, one IPv6 prefix (2407:c800::/32), and only 18 BGP neighbours. That combination — a large address count with a small peer count — is the shape of an eyeball network serving its own subscribers, not a wholesale carrier. Reverse DNS across the space confirms it: samples resolve to per-subscriber names under catv02.itscom.jp (cable modem customers), hikari.itscom.jp (fibre customers) and bb.itscom.jp (backbone/aggregation gear such as cswkote12, eswtama14). Several blocks carry sibling brands — ccjnet.ne.jp, netyou.jp and f243.246.ne.jp — reflecting other cable operators folded into or served by the same platform.
Notable
- The
catv02versushikarisplit in the PTRs shows both generations of the plant live in the same ASN: legacy DOCSIS cable and newer fibre-to-the-home. - Address holdings are unusually diverse for a regional operator: four separate /16s plus assorted /17s and /18s, drawn from both old JPNIC space (
61.206,210.253) and newer APNIC ranges (103.2.136.0/22).
Interesting
The naming convention h219-110-128-005 embeds the address in the hostname, a very common Japanese ISP style that makes it trivial to see, from a PTR alone, which access technology a subscriber is on.
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 3 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| JPIX Tokyo | Tokyo, Japan | 210.171.224.78 |
| Equinix Internet Exchange Tokyo | Tokyo, Japan | 203.190.230.44 |
| Network Service Provider IXP (Distributed IX in Edo) | Tokyo, Japan | 202.249.2.162 |
Transit providers
9 upstream, 2 downstream and 16 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 14 prefixes · 404K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 15 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS9365- Registry name
- iTSCOM
- Abuse contact
- hostmaster@nic.ad.jp
- Registered
- 1998-08-17
- Last changed
- 2005-08-31
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 15 with no ROA
- ROAs
- 0 authorising AS9365
- ASPA
- no ASPA record
- IRR
- 100% registered · 15 of 15 announcements
- Route objects
- 72 naming AS9365
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: 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