Autonomous system
AS2522 PPP-EXP Japan Network Information Center
Unclassified APNIC
Summary
Japan Network Information Center (JPNIC)
legacy
PPP-EXP is held by the Japan Network Information Center (JPNIC), Japan's national internet registry, and is used for its Pool Protection Project rather than by an end-user organization.
What it's used for
- Announcing otherwise-unused address space so that free blocks appear routed, a defensive measure against unauthorized (hijacked) announcements.
Notable
- Operated by the registry itself (a JPNIC/IIJ effort), so this is infrastructure tooling, not a commercial ISP, host, or corporate network.
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
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.
| AS | Network | Paths seen |
|---|---|---|
| AS2497 | Internet Initiative Japan Inc. | 885 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-16, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 15 prefixes · 229K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 15 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS2522- Registry name
- PPP-EXP
- Registered
- 2002-04-05
- Last changed
- 2026-08-25
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 15 with no ROA
- ROAs
- 0 authorising AS2522
- ASPA
- no ASPA record
- IRR
- 0% registered · 0 of 15 announcements 1 other origin
- Route objects
- 0 naming AS2522
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: 442 networks and 1,783 prefixes, as published 2026-10-17. 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