asn.dev

Autonomous system

AS55894 WHOSNEXT Whos Next

Unclassified ARIN

IPv4 addresses 1.02K 1 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly JP
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

Who's Next

Japan · AI-generated

business japan small

The AS handle is WHOSNEXT and the holder is Who's Next.

What it's used for

  • The address space carries business traffic, evidenced by the reverse DNS record sv103x5x178x254.who-s-next.com and the netname WHOSNEXT.
  • The network announces 1024 IPv4 addresses across 1 prefix with 1 observed neighbour, indicating a small, self-contained corporate or business estate rather than a transit or large access network.
  • Traffic from this AS consists of web and API endpoints for the Who's Next organization, which operates as a business entity in Japan.

Notable

  • The RDAP registrant is Japan Network Information Center (JPNIC), which is the standard registry for Japanese IP space, while the AS holder is Who's Next.
  • The address inventory consists of a single contiguous /22 block (103.5.176.0/22), representing a compact and unified allocation.

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 1 adjacent networks observed; most-used upstreams first.

ASNetworkPaths seen
AS10021KVH Co.,Ltd57

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-30, 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 1 prefixes · 1.02K addresses IPv6 0 prefixes

CountryNamePrefixes
JPJapan1

Registry

Allocation record

ARIN · via Atlas (registry + RDAP)
Registry
ARIN
Handle
AS55894
Registry name
WHOSNEXT
Registered
2010-11-29
Last changed
2012-01-14
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 1 with no ROA
ROAs
0 authorising AS55894
ASPA
no ASPA record
IRR
100% registered · 1 of 1 announcements
Route objects
1 naming AS55894

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: 447 networks and 1,849 prefixes, as published 2026-10-30. 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