Autonomous system
AS9743 NIPPONEDUIX-AS-AP Nippon EDUIX
Unclassified APNIC
Summary
Nippon EDU-IX
legacy ixp education research
AS9743 (NIPPONEDUIX-AS-AP) is registered to Nippon EDUIX, a Japanese educational internet-exchange project (Nippon EDU-IX, eduix.jp) operating in the Kantō region. It presents itself as a free, education-oriented exchange rather than a commercial carrier or hosting business.
What it's used for
The routing footprint is about as minimal as an active AS gets. RIS sees no IPv4 prefixes at all and a single IPv6 announcement, 2001:df3:25c0::/48, with one observed BGP neighbour. That is a v6-only, single-upstream presence: enough to be reachable and to originate its own space, and nothing more. It is consistent with a small community or educational exchange whose real function is Layer 2 interconnection between participants — an IXP's peering fabric does not need to be announced in BGP, so the AS itself carries only the project's own infrastructure addressing. The absence of any IPv4 origin is itself notable: it means the project never held or no longer announces legacy v4 space and has built out on IPv6 alone.
Notable
- Do not read this as a major Japanese exchange point. The commercial Japanese IXes (JPIX, JPNAP and the like) are separate, far larger operations; this is a small educational effort.
- A low-numbered ASN with a v6-only, single-neighbour footprint usually means the number outlived its original holder and has been re-registered to a newer project. Treat any age inference from the ASN itself with suspicion.
- With one neighbour and no IPv4, this AS carries essentially no third-party traffic; it is an identity for the project, not a transit path.
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 |
|---|---|---|
| AS45691 | DODO K.K. | 37 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-18, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 0 prefixes · 0 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 1 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9743- Registry name
- NIPPONEDUIX-AS-AP
- Registrant
- Nippon EDUIX
- Abuse contact
- noc@eduix.jp
- Registered
- 2023-11-15
- Last changed
- 2023-11-17
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 100% valid · 1 valid, 0 with no ROA
- ROAs
- 1 authorising AS9743
- ASPA
- no ASPA record
- IRR
- 100% registered · 1 of 1 announcements
- Route objects
- 1 naming AS9743
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 1,784 prefixes, as published 2026-10-19. 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