Autonomous system
AS37922 CATVY Diversitymedia Co.,Ltd.
Residential APNIC Cable/DSL/ISP
Summary
Diversitymedia Co.,Ltd.
cable isp residential japan
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.jpand netnamesCATVY-ISP-01andCATVY-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. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| BroadBand Internet eXchange Tokyo | Tokyo, Japan | 101.203.89.77 |
Transit providers
8 upstream, 0 downstream and 12 adjacent networks observed; most-used upstreams first.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-28, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 9.22K addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 3 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS37922- Registry name
- CATVY
- Registered
- 2006-01-30
- Last changed
- 2020-04-24
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- Diversity Media Co.,Ltd.
- Also known as
- Cable TV Yamagata Co. ex. "CATVY"
- Network type
- Cable/DSL/ISP
- Scope
- Asia Pacific
- Traffic ratio
- Heavy Inbound
- Peering policy
- Open
- IRR as-set
AS37922- Present at
- 2 exchanges
- Website
- https://www.diversitymedia.jp/
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 100% valid · 7 valid, 0 with no ROA
- ROAs
- 3 authorising AS37922
- ASPA
- no ASPA record
- IRR
- 86% registered · 6 of 7 announcements
- Route objects
- 6 naming AS37922
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 448 networks and 1,851 prefixes, as published 2026-10-29. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere