Autonomous system
AS9601 SHIBATA Niigata Communication Service
Residential APNIC
Summary
Niigata Communication Service (Internet Shibata)
isp residential legacy
AS9601 (SHIBATA) is held by Niigata Communication Service Co., Ltd. (株式会社新潟通信サービス), a regional ISP based in Shibata City, Niigata Prefecture. It operates the Internet Shibata and BB.Niigata connectivity brands and runs its own fibre network across the prefecture, serving both residential subscribers and local businesses.
What it's used for
This is a small regional access network. It announces 7 IPv4 prefixes for 27,648 addresses, the largest being two /19s (114.134.32.0/19, 211.12.192.0/19), plus three IPv6 blocks carved out of 2402:a800::/33. The reverse DNS is uniformly per-address subscriber naming, with fi005.p32, fi1005.i208 and n5.m48 style hostnames indexed by the position of the address inside its parent block. That mechanical, generated-per-line pattern is exactly what an access ISP produces for its PPPoE and fixed-line pools, and it appears across every announced block, not just one. The 15 observed BGP neighbours sit at the level a small provider needs for redundant upstreams and a couple of domestic peering sessions, not the hundreds a transit network would carry.
Notable
- The
SHIBATAhandle is a place name, not a person or a brand: Shibata City is where the company is headquartered and where its ISP service Internet Shibata takes its name from. - The IPv6 deployment is unusual for a network this size. Three nested blocks (
/33,/34,/35) from a single2402:a800::parent suggest the address plan is subdivided by region or service rather than announced as one aggregate.
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 2 exchanges in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| JPIX Tokyo | Tokyo, Japan | 210.171.224.135 |
| Echigo Internet Exchange | Niigata, Japan | 58.84.254.16 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-27, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 7 prefixes · 27.65K addresses IPv6 3 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 10 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9601- Registry name
- SHIBATA
- Registered
- 1999-08-05
- Last changed
- 2007-10-29
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 10 with no ROA
- ROAs
- 0 authorising AS9601
- ASPA
- no ASPA record
- IRR
- 70% registered · 7 of 10 announcements
- Route objects
- 17 naming AS9601
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: 447 networks and 1,852 prefixes, as published 2026-10-27. 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