157.203.255.0/24 Atos IT Services UK Ltd
Announced by AS21369 Atos IT Services UK Ltd. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 157.203.255.0/24
Prefix
Origin
AS21369 SEMA-UK-AS
RPKI
RPKI valid
Size
256 addresses
Less specific
More specifics
0
IRR route objects
1 exact, 3 covering
In RouteViews
2026-10-14 20:02 UTC
Paths
How 157.203.255.0/24 is reached
Every path our looking glass collectors hold for this exact prefix. Open one for its attributes, or see them all side by side in the looking glass.
AS36601 TNT (TNT - Tampa, FL)Collector-1-TAMPA-FL36601 174 3356 198949 21369
| Origin | AS21369 Atos IT Services UK Ltd |
| Origin code | IGP |
| Communities | 174:21000 174:22013 36601:150 36601:174 36601:2001 198949:0:2500 |
| Updated | 18h 33m ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 198949 21369
| Origin | AS21369 Atos IT Services UK Ltd |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 7d 5h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 3356 198949 21369
| Origin | AS21369 Atos IT Services UK Ltd |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 7d 5h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS21369 to originate 157.203.255.0/24 up to /24. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 157.203.255.0/24 | /24 | AS21369 SEMA-UK-AS | RIPE |
| 157.203.254.0/23 | /23 | AS21369 SEMA-UK-AS | RIPE |
IRR
Route objects
Registered in the IRR for this prefix and the ones covering it. Look it up live.
| Route | Origin | Source | Description | Maintained by |
|---|---|---|---|---|
| 157.203.255.0/24 | AS21369 SEMA-UK-AS | RIPE | ATOS Origin IT Birmingham Test | SEMA-UK-AS-MNT |
| 157.203.254.0/23 covering | AS21369 SEMA-UK-AS | RIPE | Atos Origin IT Internet Aggregate | SEMA-UK-AS-MNT |
| 157.203.0.0/16 covering | AS198949 Radware | RADB | Techaccess Atos UK | MAINT-AS198949 |
| 157.203.0.0/16 covering | AS21369 SEMA-UK-AS | RIPE | ATOS Origin IT | SEMA-UK-AS-MNT |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.