Autonomous system
AS18274 UCATV Utsunomiya Cable TV Corporation
Unclassified APNIC
Summary
Utsunomiya Cable TV Corporation
cable residential japan isp
The AS handle UCATV is held by Utsunomiya Cable TV Corporation.
What it's used for
- The address space carries residential cable internet services, evidenced by reverse DNS entries such as
user116118219254.ucatv.ne.jpanduser202173107254.ucatv.ne.jp. - The network announces 26,624 IPv4 addresses across 8 prefixes and 1 IPv6 prefix, while maintaining 19 observed neighbours, a ratio consistent with a regional access provider.
Notable
- All registrants for the announced prefixes are listed as Japan Network Information Center, which aligns with the announcer's identity as a Japanese cable operator.
- The inventory consists of six /20 blocks and two /22 blocks, all under the netname
UCATV-CIDR-BLK-JPorUCATV-NW, indicating a consolidated corporate estate.
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 | 101.203.89.56 |
| JPIX Tokyo | Tokyo, Japan | 210.171.224.107 |
Transit providers
6 upstream, 0 downstream and 10 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 2026-10-27, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 8 prefixes · 26.62K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 9 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS18274- Registry name
- UCATV
- Registered
- 2002-07-01
- Last changed
- 2002-11-14
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 10 valid, 0 with no ROA
- ROAs
- 10 authorising AS18274
- ASPA
- no ASPA record
- IRR
- 40% registered · 4 of 10 announcements
- Route objects
- 13 naming AS18274
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: 447 networks and 1,852 prefixes, as published 2026-10-27. 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