AS24271 — ICTV Iruma CATV co.

AS24271 announces 2 IPv4 prefixes covering 18,432 addresses and 1 IPv6 prefixes.

About this network

The AS handle ICTV Iruma CATV co. is held by iCTV - Iruma CATV co.

What it's used for

• The address space carries residential cable access, evidenced by reverse DNS entries such as ftu080000.ictv.ne.jp and ftu24218000.ictv.ne.jp which follow a standard cable modem termination system naming convention.
• The network announces 18432 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining 21 observed neighbours; this ratio of significant address space against a moderate peer count is characteristic of a regional access provider rather than a transit carrier.

Notable

• The registrants for both announced prefixes are listed as Japan Network Information Center; IRT-JPNIC-JP, which is the standard registry holder for Japanese IP space and does not indicate a mismatch with the operator.
• The address inventory consists of one large /18 block (202.177.64.0/18) and one smaller /21 block (218.231.216.0/21), alongside a /32 IPv6 allocation, reflecting a typical allocation structure for a local cable operator.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 202.177.64.0/18
• 218.231.216.0/21
• 2400:99a0::/32

Upstream networks

• AS2516 KDDI CORPORATION
• AS6939 Hurricane Electric LLC
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS20485 Joint Stock Company TransTeleCom
• AS10010 TOKAI Communications Corporation

Adjacent networks

• AS2516 KDDI CORPORATION
• AS6939 Hurricane Electric LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS20485 Joint Stock Company TransTeleCom
• AS10010 TOKAI Communications Corporation

Routing security

• RPKI: 9 valid, 0 invalid and 0 not-found announcements; 6 ROAs.
• ASPA: none published.
• IRR: 89% of announcements registered; 8 route objects.
• Listed in as-sets: AS-17930ARCSTAR, AS-ANC-CUSTOMER-PROXY-REGISTER, AS-GIGAINFRA, AS-GIGAINFRA-V6, AS-HURRICANEV6, AS-IIJ, AS-IIJ6, AS-INFOSPHERE, AS-INFOSPHERE-V6, AS-KDD, AS-KDDI6, AS-MESH-CUSTOMER:AS10010, AS-OCN, AS-OCN, AS-TELSTRA-INTL-CUSTOMERS, AS-TELSTRA-INTL-CUSTOMERS-4637, AS-TOKAI, AS-TOKAI6, AS-VECTANT, AS2497:AS-IIJ, AS2497:AS-IIJ6, AS3491:AS-CUSTOMERS-AP.

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan