Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About WIDE Project
The WIDE Project is an Internet project in Japan founded by Keio University, Tokyo Institute of Technology, and The University of Tokyo that was started in 1985. It runs a major backbone of the Japanese internet and used to run the .jp Top Level Domain (TLD).
Network profile
Source: PeeringDB →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 203.178.128.0/17 | 32.8K |
7.1%
|
WIDE Project | JP | — | — |
| 133.4.128.0/18 | 16.4K |
0.0%
|
WIDE Project | JP | — | — |
| 202.249.0.0/18 | 16.4K |
0.0%
|
WIDE Project | JP | — | — |
| 202.249.32.0/19 | 8.2K |
0.8%
|
WIDE Project | JP | — | — |
| 202.249.0.0/20 | 4.1K |
4.5%
|
WIDE Project | JP | — | — |
| 202.249.16.0/21 | 2.0K |
0.0%
|
WIDE Project | JP | — | — |
| 202.249.28.0/22 | 1.0K |
0.0%
|
WIDE Project | JP | — | — |
| 202.249.26.0/23 | 512 |
23.0%
|
WIDE Project | JP | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS2500 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 203.178.128.0/17 | 4,740 | 2026-07-26 12:35:39 |
| 202.249.0.0/18 | 4,654 | 2026-07-26 12:35:39 |
| 133.4.128.0/18 | 4,630 | 2026-07-26 12:34:44 |
Frequently Asked Questions
What is AS2500?
AS2500 is an Autonomous System Number assigned to WIDE Project. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS2500 announce?
AS2500 announces 65.0K IPv4 addresses distributed across 7 routed CIDR prefixes. The network is registered in Japan.
Who operates AS2500?
AS2500 is operated by WIDE Project. The organization is based in Japan. You can view all IP ranges and related ASNs on the organization page.
What country is AS2500 registered in?
AS2500 is registered in Japan. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
