Autonomous System
AS21369 Atos IT Services UK Ltd
BusinessActiveUnited KingdomRIPE
AS21369 (SEMA-UK-AS) is a business network operated by Atos IT Services UK Ltd in United Kingdom, registered with RIPE. It has 46 IPv4 prefixes with 16,128 addresses, which makes it the 7,962nd largest of 82,200 active autonomous systems by IPv4 space.
IPv4 addresses16,128in 46 prefixes
IPv6 prefixes0none
Size rank#7,962of 82,200 active ASNs
Details
OrganizationAtos IT Services UK Ltd
AS nameSEMA-UK-AS
Websiteatos.net
Country United Kingdom (GB)
Network typeBusiness
RegistryRIPE
Abuse contactuk.abuse@atos.net
Registered2001-11-15
Last updated2023-01-03
IPv4 prefixes
46 prefixes · 16,128 addresses| Network | Addresses | First – last address |
|---|---|---|
| 157.203.6.0/23 | 512 | 157.203.6.0 – 157.203.7.255 |
| 157.203.36.0/23 | 512 | 157.203.36.0 – 157.203.37.255 |
| 157.203.40.0/23 | 512 | 157.203.40.0 – 157.203.41.255 |
| 157.203.42.0/23 | 512 | 157.203.42.0 – 157.203.43.255 |
| 157.203.48.0/23 | 512 | 157.203.48.0 – 157.203.49.255 |
| 157.203.52.0/23 | 512 | 157.203.52.0 – 157.203.53.255 |
| 157.203.56.0/23 | 512 | 157.203.56.0 – 157.203.57.255 |
| 157.203.58.0/23 | 512 | 157.203.58.0 – 157.203.59.255 |
| 157.203.60.0/23 | 512 | 157.203.60.0 – 157.203.61.255 |
| 157.203.62.0/23 | 512 | 157.203.62.0 – 157.203.63.255 |
| 157.203.92.0/23 | 512 | 157.203.92.0 – 157.203.93.255 |
| 157.203.120.0/23 | 512 | 157.203.120.0 – 157.203.121.255 |
| 157.203.176.0/23 | 512 | 157.203.176.0 – 157.203.177.255 |
| 157.203.178.0/23 | 512 | 157.203.178.0 – 157.203.179.255 |
| 157.203.180.0/23 | 512 | 157.203.180.0 – 157.203.181.255 |
| 157.203.242.0/23 | 512 | 157.203.242.0 – 157.203.243.255 |
| 157.203.254.0/23 | 512 | 157.203.254.0 – 157.203.255.255 |
| 157.203.6.0/24 | 256 | 157.203.6.0 – 157.203.6.255 |
| 157.203.7.0/24 | 256 | 157.203.7.0 – 157.203.7.255 |
| 157.203.36.0/24 | 256 | 157.203.36.0 – 157.203.36.255 |
| 157.203.37.0/24 | 256 | 157.203.37.0 – 157.203.37.255 |
| 157.203.40.0/24 | 256 | 157.203.40.0 – 157.203.40.255 |
| 157.203.41.0/24 | 256 | 157.203.41.0 – 157.203.41.255 |
| 157.203.42.0/24 | 256 | 157.203.42.0 – 157.203.42.255 |
| 157.203.43.0/24 | 256 | 157.203.43.0 – 157.203.43.255 |
157.203.6.0/23 157.203.36.0/23 157.203.40.0/23 157.203.42.0/23 157.203.48.0/23 157.203.52.0/23 157.203.56.0/23 157.203.58.0/23 157.203.60.0/23 157.203.62.0/23 157.203.92.0/23 157.203.120.0/23 157.203.176.0/23 157.203.178.0/23 157.203.180.0/23 157.203.242.0/23 157.203.254.0/23 157.203.6.0/24 157.203.7.0/24 157.203.36.0/24 157.203.37.0/24 157.203.40.0/24 157.203.41.0/24 157.203.42.0/24 157.203.43.0/24
The 25 largest of 46. The API and the database have all of them.
IPv6 prefixes
No IPv6 prefixes.
Query AS21369 with the API
The ASN lookup returns everything on this page as JSON, including every prefix. ASN lookups need an API key: a free account comes with 1,000 requests a day.
curl "https://api.ipapi.is/?q=AS21369&key=YOUR_API_KEY"Any address in its prefixes resolves to AS21369, with or without a key:
curl "https://api.ipapi.is/?q=157.203.6.1"