ResearchRouting table, looking glass, RPKI & IRR

191.37.72.0/21 CNT Fiber

Announced by AS263356 CNT Fiber. RPKI valid Seen by 5 of our 5 looking glass sessions.

Summary

What the table says about 191.37.72.0/21

Prefix
191.37.72.0/21
Origin
AS263356 AS263356
RPKI
RPKI valid
Size
2,048 addresses
Less specific
none
More specifics
14
IRR route objects
1 exact, 0 covering
In RouteViews
2026-10-12 16:02 UTC
Paths

How 191.37.72.0/21 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 174 23106 263356
OriginAS263356 CNT Fiber
Origin codeIGP
Communities174:21301 174:22042 36601:150 36601:174 36601:2001
Updated4d 14h ago
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 263444 21574 263356
OriginAS263356 CNT Fiber
Origin codeIGP
Communities903:900 903:13760
Updated4d 22h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 52320 23106 263356
OriginAS263356 CNT Fiber
Origin codeIGP
Communities36295:100
Updated4d 22h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Jacksonville, FL)Collector-2-COCOA-FL36295 174 23106 263356
OriginAS263356 CNT Fiber
Origin codeIGP
Communities174:21301 174:22042
Updated4d 22h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Orlando, FL)Collector-2-COCOA-FL36295 174 23106 263356
OriginAS263356 CNT Fiber
Origin codeIGP
Communities174:21301 174:22042 36295:100 36295:174
Updated8d 16h ago
RPKI

Route origin authorizations

Covered by a ROA authorizing AS263356 to originate 191.37.72.0/21 up to /24. Validate another origin.

ROA prefixMax lengthAuthorized originTrust anchor
191.37.72.0/21/24AS263356 AS263356LACNIC
IRR

Route objects

Registered in the IRR for this prefix and the ones covering it. Look it up live.

RouteOriginSourceDescriptionMaintained by
191.37.72.0/21AS263356 AS263356RADBCLARO S.A. CustomerMAINT-AS4230
More specific

Prefixes inside 191.37.72.0/21

14 announced prefixes fall inside this one.

Show the 14 prefixes
191.37.72.0/22 AS263356 AS263356191.37.72.0/23 AS263356 AS263356191.37.72.0/24 AS263356 AS263356191.37.73.0/24 AS263356 AS263356191.37.74.0/23 AS263356 AS263356191.37.74.0/24 AS263356 AS263356191.37.75.0/24 AS263356 AS263356191.37.76.0/22 AS263356 AS263356191.37.76.0/23 AS263356 AS263356191.37.76.0/24 AS263356 AS263356191.37.77.0/24 AS263356 AS263356191.37.78.0/23 AS263356 AS263356191.37.78.0/24 AS263356 AS263356191.37.79.0/24 AS263356 AS263356
Tools

Check 191.37.72.0/21 live

Looking glassIP to ASN APIRPKI APIIRR API