AS18274 — UCATV Utsunomiya Cable TV Corporation

AS18274 announces 8 IPv4 prefixes covering 26,624 addresses and 1 IPv6 prefixes.

About this network

The AS handle UCATV is held by Utsunomiya Cable TV Corporation.

What it's used for

• The address space carries residential cable internet services, evidenced by reverse DNS entries such as user116118219254.ucatv.ne.jp and user202173107254.ucatv.ne.jp.
• The network announces 26,624 IPv4 addresses across 8 prefixes and 1 IPv6 prefix, while maintaining 19 observed neighbours, a ratio consistent with a regional access provider.

Notable

• All registrants for the announced prefixes are listed as Japan Network Information Center, which aligns with the announcer's identity as a Japanese cable operator.
• The inventory consists of six /20 blocks and two /22 blocks, all under the netname UCATV-CIDR-BLK-JP or UCATV-NW, indicating a consolidated corporate estate.

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

Announced prefixes

• 103.82.88.0/22
• 116.118.208.0/20
• 202.173.96.0/20
• 202.208.64.0/20
• 210.236.112.0/20
• 219.97.112.0/20
• 219.100.164.0/22
• 219.122.96.0/20
• 2407:3300::/32

Upstream networks

• AS2516 KDDI CORPORATION
• AS2519 ARTERIA Networks Corporation
• AS6939 Hurricane Electric LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS20485 Joint Stock Company TransTeleCom

Adjacent networks

• AS2516 KDDI CORPORATION
• AS2519 ARTERIA Networks Corporation
• AS6939 Hurricane Electric LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS20485 Joint Stock Company TransTeleCom

Routing security

• RPKI: 10 valid, 0 invalid and 0 not-found announcements; 10 ROAs.
• ASPA: none published.
• IRR: 40% of announcements registered; 13 route objects.
• Listed in as-sets: AS-17930ARCSTAR, AS-CABLETV, AS-GIGAINFRA, AS-GIGAINFRA-V6, AS-HURRICANEV6, AS-IIJ, AS-IIJ6, AS-IPV6_VECTANT, AS-KDD, AS-KDDI6, AS-MHDD, AS-OCN, AS-OCN, AS-VECTANT, AS2497:AS-IIJ, AS2497:AS-IIJ6.

Internet exchanges

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