AS4690 — WIDE-SFO - WIDE Project

AS4690 announces 1 IPv4 prefixes covering 256 addresses and 1 IPv6 prefixes.

About this network

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 -SFO in 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.

Announced prefixes

• 202.0.73.0/24
• 2001:200:e00::/40

Upstream networks

• AS2500 WIDE Project

Adjacent networks

• AS2500 WIDE Project

Routing security

• RPKI: 1 valid, 0 invalid and 1 not-found announcements; 2 ROAs.
• ASPA: none published.
• IRR: 100% of announcements registered; 4 route objects.
• Listed in as-sets: AS-2500-2914, AS-BBIX-T, AS-BBIX-T-V6, AS-GCTR-JP, AS-IIJ, AS-IIJ6, AS-WIDE, AS-WIDE-V6, AS20965:AS-FROM-TEIN-TO-GEANT, AS2497:AS-IIJ, AS2497:AS-IIJ6, AS2500:AS-TRANSIT, AS293:AS-FROM-SINGAREN-TO-ESNET.

Internet exchanges

• Equinix Internet Exchange Palo Alto — Palo Alto, United States