AS9351 — ZLAN ZTV CO.,LTD

Network type: residential

AS9351 announces 30 IPv4 prefixes covering 249,856 addresses and 1 IPv6 prefixes.

About this network

AS9351 (ZLAN) is held by ZTV Co., Ltd., a cable television operator headquartered in Tsu, Mie Prefecture, serving Mie and neighbouring Shiga and Wakayama. The handle is its Internet brand, "Z-LAN"; alongside cable TV it sells broadband and telephony.

What it's used for

This is a cable eyeball network and the evidence is about as clean as it gets. RIS observes 30 IPv4 prefixes carrying roughly 249,856 addresses, one IPv6 /32 (2401:900::/32), and 25 BGP neighbours. A quarter of a million addresses in only 30 aggregates — /17s and /18s at the top, /19s and /20s below — is the shape of an access network pooling subscribers into large contiguous blocks, and the low neighbour count rules out any wholesale role. Reverse DNS confirms it directly: essentially every sampled address resolves to a host-<a>-<b>-<c>-<d> pattern under ztv.ne.jp or pc.ztv.ne.jp, the generic per-subscriber naming that cable operators apply across their entire consumer pool. A second brand, amigo.ne.jp / amigo2.ne.jp, appears on parts of the space, so the AS carries more than one consumer ISP name.

Notable

• ZTV runs cable TV, Internet and fixed telephony as a regional Japanese MSO; this AS is the Internet side of that business.
• Consumer-CPE reverse DNS across almost the whole sample makes the residential classification unusually well grounded here.
• IPv6 is announced as a single /32 with no deaggregation.

Interesting

Two of the announced prefixes, 193.116.0.0/19 and 193.117.64.0/19, sit in 193/8 — historically European address space — yet their PTRs resolve to host-193-117-64-5.pc.ztv.ne.jp. Whatever the blocks' origin, they are genuinely in service carrying Japanese cable subscribers today.

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

Announced prefixes

• 27.113.192.0/19
• 61.125.144.0/20
• 61.198.48.0/20
• 61.206.192.0/20
• 110.44.64.0/19
• 112.136.0.0/17
• 113.20.192.0/18
• 117.18.128.0/18
• 122.152.32.0/20
• 124.40.64.0/19
• 124.40.96.0/20
• 124.110.160.0/19
• 150.91.128.0/20
• 157.70.160.0/19
• 157.70.192.0/20
• 182.22.128.0/17
• 193.116.0.0/19
• 193.117.64.0/19
• 202.59.176.0/20
• 202.60.160.0/19
• 202.91.208.0/20
• 202.137.32.0/19
• 203.133.128.0/19
• 210.236.160.0/19
• 218.45.144.0/20
• 218.216.160.0/20
• 218.228.0.0/20
• 219.103.64.0/20
• 219.109.240.0/20
• 219.113.112.0/20
• 2401:900::/32

Upstream networks

• AS2497 Internet Initiative Japan Inc.
• AS6939 Hurricane Electric LLC
• AS9354 Community Network Center Inc.
• AS10010 TOKAI Communications Corporation
• AS2518 BIGLOBE Inc.
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS20485 Joint Stock Company TransTeleCom
• AS9824 JCOM Co., Ltd.
• AS9002 RETN Limited

Downstream networks

• AS18264 Seikei Eizo Network Inc.
• AS24283 Mieden Co.,Ltd.
• AS10015 Cyber Wave Japan Co., Ltd.
• AS24261 Mie University

Adjacent networks

• AS2497 Internet Initiative Japan Inc.
• AS9354 Community Network Center Inc.
• AS2518 BIGLOBE Inc.
• AS6939 Hurricane Electric LLC
• AS10010 TOKAI Communications Corporation
• AS24283 Mieden Co.,Ltd.
• AS18264 Seikei Eizo Network Inc.
• AS10015 Cyber Wave Japan Co., Ltd.
• AS24482 SG.GS
• AS17639 Converge ICT Solutions Inc.
• AS20485 Joint Stock Company TransTeleCom
• AS24261 Mie University
• AS9824 JCOM Co., Ltd.
• AS9002 RETN Limited

Internet exchanges

• BroadBand Internet eXchange Tokyo — Tokyo, Japan
• JPIX Tokyo — Tokyo, Japan
• BroadBand Internet eXchange Osaka — Osaka, Japan
• Equinix Internet Exchange Tokyo — Tokyo, Japan
• JPIX Osaka — Osaka, Japan