asn.dev

Autonomous system

AS59121 AKNWS-NET Asahi Kasei Networks Corporation

Unclassified APNIC

IPv4 addresses 33.02K 9 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 0 recorded by PCH
Upstreams 2 0 downstream
Flagged prefixes 0 none

Summary

Asahi Kasei Networks Corporation

Japan · AI-generated

business corporate japan

AKNWS-NET is operated by Asahi Kasei Networks Corporation.

What it's used for

  • The address space carries corporate infrastructure for Asahi Kasei, a Japanese chemical products manufacturer, as indicated by the netnames AKNWS-CIDR-BLK-JP and AKNWS-NET.
  • The AS announces 33,024 IPv4 addresses across 9 prefixes with only 2 observed neighbours, a ratio characteristic of an internal corporate estate with site-by-site segmentation rather than a transit or access network.
  • Traffic from this AS consists of office workers, manufacturing facility systems, and internal corporate endpoints for the Asahi Kasei Group.

Notable

  • Registrants for the majority of prefixes are listed as Japan Network Information Center with the netname AKNWS-CIDR-BLK-JP, while one prefix uses the netname AKNWS-NET and another uses IISNET-CIDR-BLK-JP.
  • The address inventory is dominated by the 138.212.0.0/18 block, with smaller subdivisions in the 138.212.64.0/19 range and a single /24 in the 202.11.64.0/24 range.

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

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

ASNetworkPaths seen
AS4725SoftBank Corp.105
AS4713NTT DOCOMO BUSINESS,Inc.71

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 9 prefixes · 33.02K addresses IPv6 0 prefixes

CountryNamePrefixes
JPJapan9

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS59121
Registry name
AKNWS-NET
Registered
2013-09-09
Last changed
2016-04-12
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 3 with no ROA
ROAs
0 authorising AS59121
ASPA
no ASPA record
IRR
100% registered · 3 of 3 announcements
Route objects
3 naming AS59121

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