AS37922 — CATVY Diversitymedia Co.,Ltd.

Network type: residential

AS37922 announces 2 IPv4 prefixes covering 9,216 addresses and 1 IPv6 prefixes.

About this network

CATVY is operated by Diversitymedia Co.,Ltd.

What it's used for

• The address space carries residential cable access traffic, evidenced by reverse DNS entries such as 118-91-200-0.dhcp.catvy.ne.jp and netnames CATVY-ISP-01 and CATVY-CIDR-BLK-JP.
• The AS announces 9,216 IPv4 addresses across 2 prefixes and 1 IPv6 prefix, while maintaining 19 observed neighbours; this ratio of address space to peering partners is consistent with a regional access provider rather than a transit hub.
• Traffic from this AS consists of subscriber eyeballs for cable television and broadband internet services in the Yamagata region of Japan.

Notable

• Registrants for both announced prefixes are listed as Japan Network Information Center (JPNIC), which is the standard registry holder for Japanese IP space and aligns with the announcer's identity.
• The operator was formerly known as Cable TV Yamagata Co. (CATVY) and has since rebranded to Diversitymedia Co.,Ltd.
• The inventory consists of one large /19 block and one smaller /22 block, both located in Japan.

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

Announced prefixes

• 103.239.108.0/22
• 118.91.192.0/19
• 2406:a3c0::/32

Upstream networks

• AS2519 ARTERIA Networks Corporation
• AS6939 Hurricane Electric LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS9002 RETN Limited
• AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC
• AS4713 NTT DOCOMO BUSINESS,Inc.
• AS35280 F5 Networks SARL

Adjacent networks

• AS2519 ARTERIA Networks Corporation
• AS6939 Hurricane Electric LLC
• AS17639 Converge ICT Solutions Inc.
• AS24482 SG.GS
• AS9002 RETN Limited
• AS8966 EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC
• AS4713 NTT DOCOMO BUSINESS,Inc.
• AS35280 F5 Networks SARL

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan