Autonomous system
AS9622 KCT Kurashiki Cable TV
Residential ARIN
Summary
Kurashiki Cable Television (KCT)
isp residential legacy
AS9622 (KCT) is held by Kurashiki Cable Television Co., Ltd., the largest cable operator in southern Okayama Prefecture, serving Kurashiki, Tamano, Soja, Hayashima and parts of Okayama City. It is a subsidiary of TOKAI Cable Network, part of TOKAI Holdings, and sells TV, fixed telephony and cable internet up to 10G.
What it's used for
A residential cable network with an unusually fragmented routing footprint: 47 announced IPv4 prefixes for only 74,752 addresses, plus one IPv6 /32 (2001:e90::/32). Many of those prefixes are more-specifics announced alongside their own covering aggregate (124.47.64.0/18 together with 124.47.64.0/20, 203.76.64.0/19 with 203.76.64.0/20, 211.125.96.0/19 with both its /20 halves), so the real address count is far smaller than the prefix count suggests. The reverse DNS is the most self-documenting in this batch: PTRs resolve under kct.ad.jp with labels cidr1 through cidr11, one per block the operator has been granted, and one block is explicitly tagged dynamic (211-125-96-5.dynamic.cidr1.kct.ad.jp). That is an eyeball operator numbering its own address history. The 22 observed BGP neighbours sit at the level of a regional ISP with redundant upstreams and domestic peering.
Notable
- The
cidrNrDNS scheme means you can read the operator's allocation order straight out of a hostname. - Deaggregation on this scale (47 prefixes for 74k addresses) is the operator carrying more-specifics for traffic engineering rather than a sign of scattered or brokered inventory. The blocks are all consistently KCT-named.
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 | 210.171.224.84 |
| JPIX Osaka | Osaka, Japan | 103.246.232.84 |
| Network Service Provider IXP (Distributed IX in Edo) | Tokyo, Japan | 202.249.2.178 |
Transit providers
8 upstream, 3 downstream and 15 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 16 prefixes · 78.85K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 17 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS9622- Registry name
- KCT
- Registered
- 1999-08-05
- Last changed
- 2020-04-10
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 51 valid, 0 with no ROA
- ROAs
- 41 authorising AS9622
- ASPA
- no ASPA record
- IRR
- 100% registered · 51 of 51 announcements
- Route objects
- 52 naming AS9622
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: 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