172.56.2.0/23 T-Mobile USA, Inc.
Announced by AS21928 T-Mobile USA, Inc. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 172.56.2.0/23
Prefix
Origin
AS21928 T-MOBILE-AS21928
RPKI
RPKI valid
Size
512 addresses
Less specific
More specifics
0
IRR route objects
2 exact, 3 covering
In RouteViews
2026-10-12 12:02 UTC
Paths
How 172.56.2.0/23 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 13760 21928
| Origin | AS21928 T-Mobile USA, Inc. |
| Origin code | incomplete |
| Communities | 13760:3002 36601:150 36601:2001 36601:13760 |
| Updated | 4d 12h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 21928
| Origin | AS21928 T-Mobile USA, Inc. |
| Origin code | incomplete |
| Communities | 903:900 903:13760 |
| Updated | 4d 21h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 21928
| Origin | AS21928 T-Mobile USA, Inc. |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 2h 49m ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS21928 to originate 172.56.0.0/16 up to /23. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 172.56.0.0/16 | /23 | AS21928 T-MOBILE-AS21928 | ARIN |
| 172.32.0.0/11 | /24 | AS21928 T-MOBILE-AS21928 | ARIN |
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 |
|---|---|---|---|---|
| 172.56.2.0/23 | AS21928 T-MOBILE-AS21928 | ARIN | USA | MNT-TMOBI |
| 172.56.2.0/23 | AS21928 T-MOBILE-AS21928 | RADB | T-Mobile USA IP Backbone | MAINT-AS21928 |
| 172.56.0.0/16 covering | AS21928 T-MOBILE-AS21928 | ARIN | USA | MNT-TMOBI |
| 172.56.0.0/16 covering | AS21928 T-MOBILE-AS21928 | RADB | T-Mobile USA IP Backbone | MAINT-AS21928 |
| 172.32.0.0/11 covering | AS21928 T-MOBILE-AS21928 | ARIN | USA | MNT-TMOBI |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.