Autonomous system
AS4690 WIDE-SFO WIDE Project
Unclassified APNIC Educational/Research
Summary
WIDE Project
research education legacy
WIDE-SFO — a network of the WIDE Project, the Japanese internet research consortium (Widely Integrated Distributed Environment) founded in 1988 and long associated with Jun Murai and Keio University.
What it's used for
- Internet research and experimental networking. WIDE runs testbeds, operational research infrastructure, and interconnection for Japanese universities and research groups.
- The
-SFOin the handle points at a US west-coast presence; WIDE has historically maintained international links and equipment outside Japan.
Notable
- Tiny by address count — a single /24 — which is normal for research and infrastructure ASNs where the point is the routing and the experiments, not the address volume.
- WIDE is an operator of real internet infrastructure, not just a lab: it is best known outside Japan for running the M root DNS server.
Interesting
- WIDE was central to Japan's early internet, IPv6 development, and the growth of research networking in Asia — an academic project that ended up carrying production traffic.
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
Recorded at 1 exchange in 1 country, largest first.
| Exchange | Location | Their address |
|---|---|---|
| Equinix Internet Exchange Palo Alto | Palo Alto, United States | 198.32.176.178 |
Transit providers
1 upstream, 0 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS2500 | WIDE Project | 93 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-13, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 1 prefixes · 256 addresses IPv6 1 prefixes
| Country | Name | Prefixes |
|---|---|---|
| JP | Japan | 2 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS4690- Registry name
- WIDE-SFO
- Registered
- 1995-08-30
- Last changed
- 2017-02-17
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- WIDE-vSIX Project
- Network type
- Educational/Research
- Scope
- Asia Pacific
- Traffic ratio
- Not Disclosed
- Peering policy
- Open
- Website
- https://sfc.wide.ad.jp
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 50% valid · 1 valid, 1 with no ROA
- ROAs
- 2 authorising AS4690
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 4 naming AS4690
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: 440 networks and 1,773 prefixes, as published 2026-10-13. 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