AS9354 — TDNC Community Network Center Inc.

Network type: residential

AS9354 announces 21 IPv4 prefixes covering 200,448 addresses and 11 IPv6 prefixes.

About this network

AS9354 (TDNC) is held by Community Network Center Inc. (CNCI), a Nagoya-based cable holding company that is one of Japan's largest multiple-system operators. It was formed as an alliance of cable television companies in the Tokai region and today sits above a group of local cable operators, whose subscribers this AS carries.

What it's used for

This is a cable eyeball network operated at group scale. RIS observes 37 IPv4 prefixes carrying about 200,448 addresses, a single IPv6 /32 (2405:7000::/32), and 100 BGP neighbours. Two hundred thousand addresses in only 37 aggregates — a run of /18s out of 221.118.0.0, plus /19s and /20s — is subscriber pooling, not customer-block deaggregation. The hundred neighbours is higher than a single regional ISP would show, and that fits a holding company aggregating several cable operators' traffic and interconnecting on their behalf at Japanese exchanges; it is still nowhere near a wholesale transit fabric given the address volume. The reverse DNS settles the role: sampled addresses resolve to global221-64-005.aitai.ne.jp and similar across the aitai.ne.jp zone (the group's Aitai net consumer ISP brand), and to 222-229-96-5.catv.medias.ne.jp and catv-219-099-000-005.medias.ne.jp — literally catv in the hostname — for the Media's Network operator. Uniform per-subscriber naming across multiple member-company brands is the signature of a consumer cable ISP group.

Notable

• CNCI is a holding company: the AS carries several member cable operators' subscribers under their own rDNS brands rather than one unified name.
• The catv. PTR labels are an unusually explicit confirmation of cable access.
• IPv6 is present as one /32 but is not deaggregated.

Interesting

The AS handle TDNC preserves the company's original name, Tokai Digital Network Center, from before it was renamed Community Network Center — a fossil in the registry that outlived the branding.

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

Announced prefixes

• 2.17.16.0/22
• 27.113.224.0/20
• 61.87.64.0/18
• 103.40.104.0/22
• 103.131.120.0/22
• 125.2.128.0/18
• 125.2.192.0/20
• 133.149.80.0/20
• 157.5.0.0/19
• 202.157.224.0/19
• 210.158.144.0/20
• 210.251.192.0/19
• 211.1.192.0/19
• 211.2.64.0/18
• 219.99.0.0/19
• 219.100.224.0/23
• 219.100.226.0/24
• 219.118.128.0/19
• 221.118.0.0/16
• 222.229.96.0/19
• 223.252.64.0/19
• 2405:7000::/38
• 2405:7000:500::/40
• 2405:7000:600::/39
• 2405:7000:800::/37
• 2405:7000:1000::/36
• 2405:7000:2000::/36
• 2405:7000:2d00::/40
• 2405:7000:2e00::/39
• 2405:7000:3000::/36
• 2405:7000:4000::/34
• 2405:7000:8000::/33

Upstream networks

• AS6939 Hurricane Electric LLC
• AS2518 BIGLOBE Inc.
• AS2516 KDDI CORPORATION
• AS2519 ARTERIA Networks Corporation
• AS2497 Internet Initiative Japan Inc.
• AS34549 meerfarbig GmbH & Co. KG
• AS17676 SoftBank Corp.
• AS50304 Blix Solutions AS
• AS24482 SG.GS
• AS48362 Stadtwerke Feldkirch
• AS48185 team.blue NV
• AS50300 CustodianDC Limited
• AS17639 Converge ICT Solutions Inc.
• AS12552 GlobalConnect AB
• AS57463 NetIX Communications JSC
• AS37721 Virtual Technologies & Solutions
• AS29075 IELO-LIAZO SERVICES SAS
• AS20485 Joint Stock Company TransTeleCom
• AS12779 IT.Gate S.p.A.
• AS3741 Dimension Data
• AS37100 SEACOM Limited
• AS20562 Broadband Hosting B.V.
• AS4637 Telstra Global
• AS9002 RETN Limited
• AS25091 IP-Max SA

Downstream networks

• AS59108 KATCH NETWORK INC.
• AS17698 COMMUNITY NETWORK CENTER INCORPORATED.
• AS17529 STARCAT Co .,LTD.
• AS10001 Mics Network Corporation
• AS9615 TOYOHASHI CABLE NETWORK INC.
• AS23831 NISIOWARI CATV CORPORATION
• AS18281 Tokoname New-TV Corporation
• AS17936 Cable Television Kani Co.,Inc.
• AS23630 CAC Inc.
• AS9351 ZTV CO.,LTD
• AS131915 Hamamatsu Cable Television .Inc
• AS23798 VR Techno Center,inc

Adjacent networks

• AS59108 KATCH NETWORK INC.
• AS17698 COMMUNITY NETWORK CENTER INCORPORATED.
• AS2497 Internet Initiative Japan Inc.
• AS6939 Hurricane Electric LLC
• AS2516 KDDI CORPORATION
• AS2518 BIGLOBE Inc.
• AS17529 STARCAT Co .,LTD.
• AS34549 meerfarbig GmbH & Co. KG
• AS2519 ARTERIA Networks Corporation
• AS10001 Mics Network Corporation
• AS17676 SoftBank Corp.
• AS9615 TOYOHASHI CABLE NETWORK INC.
• AS23831 NISIOWARI CATV CORPORATION
• AS50304 Blix Solutions AS
• AS17936 Cable Television Kani Co.,Inc.
• AS18281 Tokoname New-TV Corporation
• AS9351 ZTV CO.,LTD
• AS23630 CAC Inc.
• AS37721 Virtual Technologies & Solutions
• AS48185 team.blue NV
• AS3741 Dimension Data
• AS50300 CustodianDC Limited
• AS12552 GlobalConnect AB
• AS48362 Stadtwerke Feldkirch
• AS57463 NetIX Communications JSC

Internet exchanges

• LINX LON1 — London, United Kingdom
• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• Coresite - Any2 West — Los Angeles, United States
• Any2 California — Los Angeles, United States
• JPIX Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Singapore — Singapore, Singapore
• BroadBand Internet eXchange Osaka — Osaka, Japan
• Equinix Internet Exchange Tokyo — Tokyo, Japan
• JPIX Osaka — Osaka, Japan
• BroadBand Internet eXchange Hong Kong — Hong Kong, China
• Korea Internet Neutral Exchange KINX — Seoul, South Korea
• Equinix Internet Exchange Osaka — Osaka, Japan