AS203311
NATO Cooperative Cyber Defence Centre of Excellence
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
- Government allocation +8
- Trust score 73 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About Cooperative Cyber Defence Centre of Excellence
NATO CCD COE, officially the NATO Cooperative Cyber Defence Centre of Excellence, is one of NATO Centres of Excellence, located in Tallinn, Estonia. The centre was established on 14 May 2008, it received full accreditation by NATO and attained the status of International Military Organisation on 28 October 2008.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 185.139.252.0/22 | 1.0K |
1.1%
|
NATO Cooperative Cyber Defence Centre of Excellence | EE | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS203311 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 |
|---|---|---|
| 185.139.252.0/22 | 7,598 | 2026-08-05 19:44:33 |
Frequently Asked Questions
What is AS203311?
AS203311 is an Autonomous System Number assigned to NATO Cooperative Cyber Defence Centre of Excellence. 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 AS203311 announce?
AS203311 announces 1.0K IPv4 addresses distributed across 1 routed CIDR prefixes. The network is registered in Estonia.
Who operates AS203311?
AS203311 is operated by NATO Cooperative Cyber Defence Centre of Excellence. The organization is based in Estonia. You can view all IP ranges and related ASNs on the organization page.
What country is AS203311 registered in?
AS203311 is registered in Estonia. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
