173.251.54.0/24 Eisai Inc.
Announced by AS13599 Eisai Inc. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 173.251.54.0/24
Prefix
Origin
AS13599 13599
RPKI
RPKI valid
Size
256 addresses
Less specific
More specifics
0
IRR route objects
1 exact, 1 covering
In RouteViews
2026-10-16 04:02 UTC
Paths
How 173.251.54.0/24 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 6128×2 54004 13599
| Origin | AS13599 Eisai Inc. |
| Origin code | IGP |
| Communities | 174:21001 174:22013 36601:150 36601:174 36601:2001 |
| Updated | 8d 3h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 6461 6128 54004 13599
| Origin | AS13599 Eisai Inc. |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 8d 12h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6461 6128 54004 13599
| Origin | AS13599 Eisai Inc. |
| Origin code | IGP |
| Communities | 6461:5998 36295:100 36295:6461 |
| Updated | 16h 35m ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS13599 to originate 173.251.54.0/24 up to /24. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 173.251.54.0/24 | /24 | AS13599 13599 | ARIN |
| 173.251.0.0/17 | /24 | AS6128 CABLE-NET-1 | 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 |
|---|---|---|---|---|
| 173.251.54.0/24 | AS13599 13599 | RADB | Eisai Inc. | MAINT-AS27506 |
| 173.251.0.0/17 covering | AS6128 CABLE-NET-1 | ARIN | Cablevision Systems Corp. 1111 Steward Avenue Bethpage, NY 11714 US | MNT-CVNT |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.