37.143.0.0/22 British Telecommunications Limited
Announced by AS2856 British Telecommunications Limited. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 37.143.0.0/22
Prefix
Origin
AS2856 BT-UK-AS
RPKI
RPKI valid
Size
1,024 addresses
Less specific
none
More specifics
3
IRR route objects
18 exact, 0 covering
In RouteViews
2026-10-14 00:02 UTC
Paths
How 37.143.0.0/22 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 5400 2856
| Origin | AS2856 British Telecommunications Limited |
| Origin code | IGP |
| Communities | 174:21000 174:22013 36601:150 36601:174 36601:2001 |
| Updated | 5d 21h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 5400 2856
| Origin | AS2856 British Telecommunications Limited |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 6d 5h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6461 2856
| Origin | AS2856 British Telecommunications Limited |
| Origin code | IGP |
| Communities | 6461:5997 36295:100 36295:6461 |
| Updated | 11h 33m ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS2856 to originate 37.143.0.0/22 up to /24. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 37.143.0.0/22 | /24 | AS2856 BT-UK-AS | RIPE |
| 37.143.0.0/22 | /22 | AS3320 DTAG | RIPE |
| 37.143.0.0/22 | /24 | AS6079 RCN-AS | RIPE |
| 37.143.0.0/22 | /24 | AS7018 ATT-INTERNET4 | RIPE |
| 37.143.0.0/22 | /24 | AS7029 WINDSTREAM | RIPE |
| 37.143.0.0/22 | /24 | AS7843 TWC-7843-BB | RIPE |
| 37.143.0.0/22 | /24 | AS20115 CHARTER-20115 | RIPE |
| 37.143.0.0/22 | /24 | AS22773 ASN-CXA-ALL-CCI-22773-RDC | RIPE |
| 37.143.0.0/22 | /24 | AS399955 BRCRUDE-NETWORK | 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 |
|---|---|---|---|---|
| 37.143.0.0/22 | AS2856 BT-UK-AS | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS3320 DTAG | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS6079 RCN-AS | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS7018 ATT-INTERNET4 | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS7029 WINDSTREAM | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS7843 TWC-7843-BB | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS20115 CHARTER-20115 | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS22773 ASN-CXA-ALL-CCI-22773-RDC | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS399955 BRCRUDE-NETWORK | RADB | autogen | MAINT-AS834 |
| 37.143.0.0/22 | AS2856 BT-UK-AS | RIPE | N | NETUTILS-MNT |
| 37.143.0.0/22 | AS3320 DTAG | RIPE | N | NETUTILS-MNT |
| 37.143.0.0/22 | AS6079 RCN-AS | RIPE | N | NETUTILS-MNT |
| 37.143.0.0/22 | AS7018 ATT-INTERNET4 | RIPE | N | NETUTILS-MNT |
| 37.143.0.0/22 | AS7029 WINDSTREAM | RIPE | N | NETUTILS-MNT |
| 37.143.0.0/22 | AS7843 TWC-7843-BB | RIPE | N | NETUTILS-MNT |
| 37.143.0.0/22 | AS20115 CHARTER-20115 | RIPE | N | NETUTILS-MNT |
| 37.143.0.0/22 | AS22773 ASN-CXA-ALL-CCI-22773-RDC | RIPE | N | NETUTILS-MNT |
| 37.143.0.0/22 | AS399955 BRCRUDE-NETWORK | RIPE | N | NETUTILS-MNT |
More specific
Prefixes inside 37.143.0.0/22
3 announced prefixes fall inside this one.