AS18260 — e-catv - EHIME CATV CO.,LTD.

AS18260 announces 21 IPv4 prefixes covering 78,592 addresses and 1 IPv6 prefixes.

About this network

The AS handle E-CATV is held by Ehime CATV Co., Ltd.

What it's used for

• The address space carries residential cable internet traffic, evidenced by reverse DNS entries such as 101.1.80.0.user.e-catv.ne.jp and 220.156.208.0.user.e-catv.ne.jp.
• The network announces 78,592 IPv4 addresses across 21 prefixes and 1 IPv6 prefix, maintaining 24 observed neighbours, a ratio consistent with an access provider serving local subscribers.

Notable

• Registrants for the largest prefixes are uniformly listed as Japan Network Information Center with netnames E-CATV or e-catv-CIDR-BLK-JP, aligning with the announcer's identity.
• The inventory includes a prefix with the netname COSMOSTV (202.165.48.0/21) and another with emboma-CIDR-BLK-JP (103.194.72.0/22), suggesting historical acquisitions or managed space for other regional operators.
• The address inventory is finely subdivided into multiple /22 and /23 blocks alongside larger /18 and /19 allocations, typical of a regional cable operator managing distinct service areas.

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

Announced prefixes

• 24.53.192.0/19
• 27.106.208.0/21
• 27.106.224.0/19
• 101.1.64.0/18
• 101.2.128.0/19
• 101.55.232.0/21
• 103.2.64.0/22
• 103.194.72.0/22
• 119.30.8.0/22
• 119.30.12.0/23
• 202.165.48.0/21
• 210.87.224.0/20
• 210.141.208.0/22
• 210.141.214.0/23
• 210.141.216.0/23
• 210.141.219.0/24
• 210.141.220.0/22
• 219.100.172.0/22
• 219.109.48.0/22
• 219.109.56.0/21
• 220.156.192.0/18
• 2400:df00::/32

Upstream networks

• AS2914 NTT America, Inc.
• AS2497 Internet Initiative Japan Inc.
• AS6939 Hurricane Electric LLC
• AS9607 BroadBand Tower, Inc.
• AS7522 STNet, Incorporated
• AS2518 BIGLOBE Inc.
• AS17676 SoftBank Corp.
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS9304 HGC Global Communications Limited

Downstream networks

• AS24229 IX-layers, Inc.
• AS131897 National University Corporation ,Ehime University
• AS151374 IX-layers, Inc.

Adjacent networks

• AS2914 NTT America, Inc.
• AS2497 Internet Initiative Japan Inc.
• AS6939 Hurricane Electric LLC
• AS9607 BroadBand Tower, Inc.
• AS7522 STNet, Incorporated
• AS24229 IX-layers, Inc.
• AS2518 BIGLOBE Inc.
• AS131897 National University Corporation ,Ehime University
• AS17676 SoftBank Corp.
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS151374 IX-layers, Inc.
• AS9304 HGC Global Communications Limited

Routing security

• RPKI: 23 valid, 4 invalid and 1 not-found announcements; 20 ROAs.
• ASPA: none published.
• IRR: 86% of announcements registered; 34 route objects.
• Listed in as-sets: AS-BBIX-T, AS-BBIX-T-V6, AS-EHIME-CATV, AS-GCTR-JP, AS-GIGAINFRA, AS-GIGAINFRA-V6, AS-HURRICANEV6, AS-IIJ, AS-IIJ6, AS-IPV6_VECTANT, AS-KDD, AS-KDDCUSTOMER2, AS-KDDI6, AS-MCNET, AS-MESH-CUSTOMER:AS10010, AS-MESH-CUSTOMER:AS18260, AS-MHDD, AS-OCN, AS-OCN, AS-OCN-V6, AS-OCN-V6, AS-PACNET-DOWNSTREAM-JP, AS-STCN, AS-TELSTRA-INTL-CUSTOMERS, AS-TOKAI.

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Osaka — Osaka, Japan
• Network Service Provider IXP (Distributed IX in Edo) — Tokyo, Japan