173.37.0.0/20 CISCO SYSTEMS, INC.
Announced by AS109 CISCO SYSTEMS, INC. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 173.37.0.0/20
Prefix
Origin
AS109 CISCOSYSTEMS
RPKI
RPKI valid
Size
4,096 addresses
Less specific
More specifics
0
IRR route objects
2 exact, 2 covering
In RouteViews
2026-10-13 20:02 UTC
Paths
How 173.37.0.0/20 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 109
| Origin | AS109 CISCO SYSTEMS, INC. |
| Origin code | IGP |
| Communities | 3356:3 3356:22 3356:100 3356:123 3356:575 3356:901 3356:2008 36601:150 36601:2001 36601:13760 |
| Updated | 5d 19h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 109
| Origin | AS109 CISCO SYSTEMS, INC. |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 6d 3h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 3356 109
| Origin | AS109 CISCO SYSTEMS, INC. |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 6d 3h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS109 to originate 173.36.0.0/14 up to /24. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 173.36.0.0/15 | /24 | AS198949 Radware | ARIN |
| 173.36.0.0/14 | /24 | AS109 CISCOSYSTEMS | 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 |
|---|---|---|---|---|
| 173.37.0.0/20 | AS109 CISCOSYSTEMS | ARIN | 170 West Tasman Drive San Jose CA 95134 United States | MNT-CS-2831 |
| 173.37.0.0/20 | AS198949 Radware | RADB | CiscoIT | MAINT-AS198949 |
| 173.36.0.0/14 covering | AS109 CISCOSYSTEMS | ARIN | 170 West Tasman Drive San Jose CA 95134 United States | MNT-CS-2831 |
| 173.36.0.0/14 covering | AS109 CISCOSYSTEMS | RADB | CISCO SYSTEMS, INC 170 WEST TASMAN DRIVE SAN JOSE, CA 95134 US RP-SJC | MAINT-AS109 |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.