81.91.80.0/21 Web4U s.r.o.
Announced by AS39790 Web4U s.r.o. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 81.91.80.0/21
Prefix
Origin
AS39790 WEB4U
RPKI
RPKI valid
Size
2,048 addresses
Less specific
More specifics
0
IRR route objects
1 exact, 1 covering
In RouteViews
2026-10-13 08:02 UTC
Paths
How 81.91.80.0/21 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 3356 199803 39790
| Origin | AS39790 Web4U s.r.o. |
| Origin code | IGP |
| Communities | 3356:2 3356:22 3356:100 3356:123 3356:512 3356:901 3356:2083 36601:150 36601:2001 36601:13760 |
| Updated | 5d 9h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 199803 39790
| Origin | AS39790 Web4U s.r.o. |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 5d 17h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 199803 39790
| Origin | AS39790 Web4U s.r.o. |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 5d 17h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS39790 to originate 81.91.80.0/20 up to /21. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 81.91.80.0/20 | /21 | AS39790 WEB4U | 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 |
|---|---|---|---|---|
| 81.91.80.0/21 | AS39790 WEB4U | RIPE | N | MNT-WEB4U |
| 81.91.80.0/20 covering | AS39790 WEB4U | RIPE | Web4U | MNT-WEB4U |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.