Autonomous system
AS10015 CWJ-NET Cyber Wave Japan Co., Ltd.
Hosting ARIN
Summary
Cyber Wave Japan Co., Ltd.
CWJ-NET is Cyber Wave Japan Co., Ltd. (株式会社サイバーウェイブジャパン), a data-centre and cloud operator based in Ise City, Mie Prefecture. It sells hosting, colocation, the CWJ Cloud Platform, the UltraBox corporate storage service and CWJ Secure One email security (spam and virus filtering, archiving, misdirected-send prevention).
What it's used for
Hosted infrastructure. The AS announces 3 IPv4 prefixes totalling 6,400 addresses and no IPv6 — a small, tightly-held estate. Every sampled address resolves in CWJ's own zone under a flat, generic scheme: rev.61.114.224.5.cwj.ad.jp, rev.103.2.68.133.cwj.ad.jp. A rev. placeholder applied uniformly across a block is what a hosting provider does with space it will hand out to machines and tenants; it is not a subscriber pool, which would carry dhcp, ppp or dsl markers instead.
Notable
Hosting, not an eyeball ISP. One PTR breaks the pattern and confirms the read: 04.main36.ps.cwj.ad.jp looks like a numbered server in a service cluster, exactly the kind of name that appears in a data centre and nowhere in a broadband access network. The 12 observed BGP neighbours on 6,400 addresses fit a facility that buys transit and peers a little, rather than a carrier selling it.
Interesting
CWJ exists because of a public-sector project. It was set up under Mie Prefecture's Shima Cyber Base initiative, which aimed to turn the landing of high-capacity submarine cables in southern Mie into a regional IT industry. The company is a rare case where a prefectural economic-development scheme produced a working commercial data-centre operator.
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 |
|---|---|---|
| JPIX Tokyo | Tokyo, Japan | 210.171.224.227 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 3 prefixes · 6.40K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 3 |
Registry
Allocation record
- Registry
- ARIN
- Handle
AS10015- Registry name
- CWJ-NET
- Registered
- 2000-04-27
- Last changed
- 2014-06-03
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 3 with no ROA
- ROAs
- 0 authorising AS10015
- ASPA
- no ASPA record
- IRR
- 100% registered · 3 of 3 announcements
- Route objects
- 18 naming AS10015
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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