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 |
|---|---|---|---|---|---|---|
| 157.203.56.0/21 | 2.0K |
0.5%
|
Atos IT Services UK Ltd | GB | England | Ealing |
| 157.203.40.0/22 | 1.0K |
8.0%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.176.0/22 | 1.0K |
0.4%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.6.0/23 | 512 |
0.6%
|
Atos IT Services UK Ltd | GB | England | Hemel Hempstead |
| 157.203.36.0/23 | 512 |
1.4%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.48.0/23 | 512 |
1.0%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.52.0/23 | 512 |
0.4%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.92.0/23 | 512 |
0.0%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.120.0/23 | 512 |
0.0%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.180.0/23 | 512 |
0.0%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.242.0/23 | 512 |
3.5%
|
Atos IT Services UK Ltd | GB | — | — |
| 157.203.254.0/23 | 512 |
0.0%
|
Atos IT Services UK Ltd | GB | England | Swindon |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS21369 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 |
|---|---|---|
| 157.203.48.0/24 | 26,616 | 2026-09-17 03:49:00 |
| 157.203.178.0/24 | 26,492 | 2026-09-17 03:49:00 |
| 157.203.176.0/24 | 26,437 | 2026-09-17 03:49:00 |
| 157.203.40.0/24 | 26,428 | 2026-09-17 03:49:00 |
| 157.203.36.0/24 | 26,413 | 2026-09-17 03:49:00 |
| 157.203.254.0/24 | 26,391 | 2026-09-17 03:49:00 |
| 157.203.42.0/24 | 26,172 | 2026-09-17 03:49:00 |
| 157.203.58.0/23 | 25,095 | 2026-09-17 03:48:29 |
| 157.203.242.0/23 | 20,835 | 2026-09-17 04:38:52 |
| 157.203.49.0/24 | 20,063 | 2026-09-17 03:49:00 |
| 157.203.242.0/24 | 19,963 | 2026-09-17 03:49:00 |
| 157.203.181.0/24 | 19,956 | 2026-09-17 03:49:00 |
| 157.203.7.0/24 | 19,956 | 2026-09-17 03:49:00 |
| 157.203.37.0/24 | 19,951 | 2026-09-17 03:49:00 |
| 157.203.243.0/24 | 19,949 | 2026-09-17 03:49:00 |
| 157.203.177.0/24 | 19,947 | 2026-09-17 03:49:00 |
| 157.203.61.0/24 | 19,936 | 2026-09-17 03:49:00 |
| 157.203.255.0/24 | 19,908 | 2026-09-17 03:49:00 |
| 157.203.41.0/24 | 19,704 | 2026-09-17 03:49:00 |
| 157.203.60.0/24 | 15,696 | 2026-09-17 03:49:00 |
| 157.203.180.0/24 | 15,432 | 2026-09-17 03:49:00 |
| 157.203.6.0/24 | 15,415 | 2026-09-17 03:49:00 |
| 157.203.52.0/24 | 15,400 | 2026-09-17 03:49:00 |
| 157.203.59.0/24 | 15,392 | 2026-09-17 03:49:00 |
| 157.203.180.0/23 | 12,382 | 2026-09-17 03:48:29 |
| 157.203.56.0/24 | 12,379 | 2026-09-17 03:49:00 |
| 157.203.62.0/24 | 12,372 | 2026-09-17 03:49:00 |
| 157.203.53.0/24 | 12,351 | 2026-09-17 03:49:00 |
| 157.203.92.0/23 | 12,134 | 2026-09-17 03:48:29 |
| 157.203.6.0/23 | 12,115 | 2026-09-17 03:48:29 |
| 157.203.62.0/23 | 12,090 | 2026-09-17 03:48:29 |
| 157.203.52.0/23 | 12,079 | 2026-09-17 03:48:29 |
| 157.203.60.0/23 | 12,055 | 2026-09-17 03:48:29 |
| 157.203.56.0/23 | 12,038 | 2026-09-17 03:48:29 |
| 157.203.43.0/24 | 11,330 | 2026-09-17 03:49:00 |
| 157.203.179.0/24 | 11,314 | 2026-09-17 03:49:00 |
| 157.203.57.0/24 | 11,297 | 2026-09-17 03:49:00 |
| 157.203.120.0/24 | 10,718 | 2026-09-17 03:49:00 |
| 157.203.120.0/23 | 10,575 | 2026-09-17 04:38:53 |
| 157.203.178.0/23 | 10,493 | 2026-09-17 04:38:53 |
| 157.203.48.0/23 | 10,311 | 2026-09-17 04:38:48 |
| 157.203.36.0/23 | 10,248 | 2026-09-17 04:38:30 |
| 157.203.176.0/23 | 10,147 | 2026-09-17 04:38:53 |
| 157.203.42.0/23 | 10,139 | 2026-09-17 04:38:41 |
| 157.203.40.0/23 | 10,106 | 2026-09-17 04:29:35 |
| 157.203.254.0/23 | 9,848 | 2026-09-17 04:38:48 |
Frequently Asked Questions
What is AS21369?
AS21369 is an Autonomous System Number assigned to Atos IT Services UK Ltd. 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 AS21369 announce?
AS21369 announces 8.7K IPv4 addresses distributed across 12 routed CIDR prefixes. The network is registered in United Kingdom.
Who operates AS21369?
AS21369 is operated by Atos IT Services UK Ltd. The organization is based in United Kingdom. You can view all IP ranges and related ASNs on the organization page.
What country is AS21369 registered in?
AS21369 is registered in United Kingdom. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
