AS18077 — C-able - Yamaguchi Cable Vision Co.,Ltd

Network type: residential

AS18077 announces 3 IPv4 prefixes covering 135,680 addresses and 1 IPv6 prefixes.

About this network

C-ABLE is operated by Yamaguchi Cable Vision Co.,Ltd.

What it's used for

• The address space carries residential cable and fiber internet services, evidenced by reverse DNS entries like c122250032000.v4.c-able.ne.jp and netnames such as C-ABLE and C-able-CIDR-BLK-JP.
• With 143,872 IPv4 addresses announced across 30 prefixes and 20 observed neighbours, the high address-to-neighbour ratio indicates an access network serving local subscribers rather than a transit provider.

Notable

• Registrants for the largest prefixes are listed as Japan Network Information Center; IRT-JPNIC-JP, which is the regional registry rather than the operator, but the netnames consistently reference C-able.
• The inventory includes a legacy 193.82.64.0/19 block with the netname YAMAGU-JPIX, alongside the primary 122.250.0.0/17 and 122.251.0.0/17 allocations.
• The address inventory is finely subdivided into /20, /21, and /22 blocks, typical of a regional ISP managing distinct customer segments or service areas within Yamaguchi Prefecture.

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

Announced prefixes

• 122.250.0.0/15
• 202.246.180.0/23
• 218.223.192.0/20
• 2402:5a00::/32

Upstream networks

• AS2516 KDDI CORPORATION
• AS6939 Hurricane Electric LLC
• AS7670 Enecom,Inc.
• AS17676 SoftBank Corp.
• AS10010 TOKAI Communications Corporation
• AS132132 MyRepublic Ltd.
• AS24482 SG.GS
• AS9304 HGC Global Communications Limited

Adjacent networks

• AS2516 KDDI CORPORATION
• AS6939 Hurricane Electric LLC
• AS7670 Enecom,Inc.
• AS17676 SoftBank Corp.
• AS10010 TOKAI Communications Corporation
• AS24482 SG.GS
• AS132132 MyRepublic Ltd.
• AS9304 HGC Global Communications Limited

Routing security

• RPKI: 8 valid, 0 invalid and 2 not-found announcements; 3 ROAs.
• ASPA: none published.
• IRR: 30% of announcements registered; 10 route objects.
• Listed in as-sets: AS-BBIX-T, AS-CCCN, AS-GIGAINFRA, AS-HANABI-DDTB, AS-HURRICANEV6, AS-IIJ, AS-IIJ6, AS-INFOSPHERE, AS-INFOSPHERE-V6, AS-IPV6_VECTANT, AS-KDD, AS-KDDCUSTOMER2, AS-KDDI6, AS-MESH-CUSTOMER:AS10010, AS-MHDD, AS-OCN, AS-OCN, AS-OCN-V6, AS-OCN-V6, AS-PWD, AS-TELSTRA-INTL-CUSTOMERS, AS-TOKAI, AS-UCOM, AS-USEN, AS-VECTANT.

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Singapore — Singapore, Singapore
• BroadBand Internet eXchange Osaka — Osaka, Japan
• JPIX Osaka — Osaka, Japan
• BroadBand Internet eXchange Hong Kong — Hong Kong, China