asn.dev

Autonomous system

AS18139 HISOL-CSV Hitachi Solutions, Ltd.

Unclassified APNIC

IPv4 addresses 1.54K 5 prefixes
IPv6 prefixes 1 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Hitachi Solutions

Japan · AI-generated

business corporate japan

HISOL-CSV is the autonomous system for Hitachi Solutions, Ltd.

What it's used for

  • The address space is registered under the netname HISOL-CSV-CIDR-BLK-JP for the 219.109.5.0/24 block, while the 133.108.x.x blocks carry the generic JPNIC-NET-JP-ERX netname.
  • With 1536 IPv4 addresses announced across 5 prefixes and only 1 observed neighbour, the inventory suggests an internal corporate estate rather than a transit or access network.

Notable

  • Registrants for the 133.108.0.0/16 space are listed as the Japan Network Information Center, consistent with JPNIC's role as the regional registry, while the 219.109.5.0/24 block is directly associated with the Hitachi Solutions netname.
  • Hitachi Solutions is a subsidiary of the Hitachi Group, a Japanese multinational conglomerate.
  • The inventory consists of a mix of /23 and /24 IPv4 prefixes alongside a single /32 IPv6 prefix.

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

Full topology · Graph

Internet exchanges

No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.

Transit providers

1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS2516KDDI CORPORATION390

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-26, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 5 prefixes · 1.54K addresses IPv6 1 prefixes

CountryNamePrefixes
JPJapan6

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS18139
Registry name
HISOL-CSV
Abuse contact
hostmaster@nic.ad.jp
Registered
2002-03-21
Last changed
2014-10-23
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 7 with no ROA
ROAs
0 authorising AS18139
ASPA
no ASPA record
IRR
100% registered · 7 of 7 announcements
Route objects
11 naming AS18139

Reputation

Classification and threat

Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.

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: 446 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

Cross-check