AS45677 — ICV - Isahaya Cable Media Co.,Ltd

Network type: residential

AS45677 announces 4 IPv4 prefixes covering 9,216 addresses and 1 IPv6 prefixes.

About this network

ICV is operated by Isahaya Cable Media Co.,Ltd.

What it's used for

• The address space carries residential cable access traffic, evidenced by reverse DNS entries such as dhcp180x148x203x254.mv.icv-net.ne.jp and pool192x92x253x254.pool.icv-net.ne.jp.
• The AS announces 9,216 IPv4 addresses across 4 prefixes and 1 IPv6 prefix, with 14 observed neighbours, indicating a local access network rather than a transit provider.
• Traffic consists of subscriber eyeballs for the local community in Isahaya, Nagasaki, delivered via cable infrastructure.

Notable

• All registrants for the announced prefixes are listed as Japan Network Information Center with the netname ICV-NET, consistent with the AS holder.
• The address inventory is composed of four distinct IPv4 blocks and one IPv6 block, all registered under the ICV-NET netname.

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

Announced prefixes

• 103.251.116.0/22
• 180.148.184.0/21
• 180.148.192.0/20
• 192.92.248.0/21
• 2407:8f00::/32

Upstream networks

• AS18092 Kyushu Tele Communications Company
• AS6939 Hurricane Electric LLC
• AS17676 SoftBank Corp.
• AS24482 SG.GS
• AS9002 RETN Limited

Adjacent networks

• AS18092 Kyushu Tele Communications Company
• AS6939 Hurricane Electric LLC
• AS17676 SoftBank Corp.
• AS24482 SG.GS
• AS9002 RETN Limited

Routing security

• RPKI: 5 valid, 0 invalid and 0 not-found announcements; 5 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 5 route objects.
• Listed in as-sets: AS-58715, AS-CSF, AS-GIGAINFRA, AS-GIGAINFRA-V6, AS-KDD, AS-KDDI6, AS-OCN, AS-OCN, AS-OCN-V6, AS-OCN-V6, AS149765:AS-CORONETIIG-BD.

Internet exchanges

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