AS21489
The North Atlantic Treaty Organization
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 →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 185.45.52.0/22 | 1.0K |
7.4%
|
The North Atlantic Treaty Organization | BE | — | — |
| 185.45.54.0/23 | 512 |
0.0%
|
The North Atlantic Treaty Organization | BE | — | — |
| 91.223.21.0/24 | 256 |
0.0%
|
The North Atlantic Treaty Organization | BE | — | — |
| 185.45.52.0/24 | 256 |
0.0%
|
The North Atlantic Treaty Organization | BE | — | — |
| 185.45.53.0/24 | 256 |
0.0%
|
The North Atlantic Treaty Organization | IT | — | — |
| 192.101.252.0/24 | 256 |
12.1%
|
The North Atlantic Treaty Organization | BE | — | — |
| 193.110.130.0/24 | 256 |
6.3%
|
The North Atlantic Treaty Organization | BE | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21489 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 |
|---|---|---|
| 91.223.21.0/24 | 295,927 | 2026-07-30 20:26:45 |
| 185.45.55.0/24 | 291,754 | 2026-07-30 20:26:45 |
| 185.45.54.0/24 | 291,350 | 2026-07-30 20:26:45 |
| 193.110.130.0/24 | 291,078 | 2026-07-30 20:26:45 |
| 185.45.52.0/24 | 290,815 | 2026-07-30 20:26:45 |
| 192.101.252.0/24 | 290,391 | 2026-07-30 20:26:45 |
| 185.45.53.0/24 | 169,133 | 2026-07-30 20:26:45 |
Frequently Asked Questions
What is AS21489?
AS21489 is an Autonomous System Number assigned to The North Atlantic Treaty Organization. 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 AS21489 announce?
AS21489 announces 1.8K IPv4 addresses distributed across 4 routed CIDR prefixes. The network is registered in Belgium.
Who operates AS21489?
AS21489 is operated by The North Atlantic Treaty Organization. The organization is based in Belgium. You can view all IP ranges and related ASNs on the organization page.
What country is AS21489 registered in?
AS21489 is registered in Belgium. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
