172.56.30.0/23 T-Mobile USA, Inc.
Announced by AS21928 T-Mobile USA, Inc. RPKI valid Seen by 3 of our 5 looking glass sessions.
Summary
What the table says about 172.56.30.0/23
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
2026-10-14 20:02 UTC
Paths
How 172.56.30.0/23 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.
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 36295 6939 21928
| Origin | AS21928 T-Mobile USA, Inc. |
| Origin code | IGP |
| Communities | 903:100 903:900 |
| Updated | 7d 3h 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 |
|---|---|---|---|---|
| 172.56.30.0/23 | AS21928 T-MOBILE-AS21928 | ARIN | USA | MNT-TMOBI |
| 172.56.30.0/23 | 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.