ResearchRouting table, looking glass, RPKI & IRR

66.76.0.0/16 Optimum

Announced by AS19108 Optimum. RPKI not found Seen by 5 of our 5 looking glass sessions.

Summary

What the table says about 66.76.0.0/16

Prefix
66.76.0.0/16
Origin
AS19108 SUDDENLINK-COMMUNICATIONS
RPKI
RPKI not found
Size
65,536 addresses
Less specific
none
More specifics
22
IRR route objects
1 exact, 0 covering
In RouteViews
2026-10-12 16:02 UTC
Paths

How 66.76.0.0/16 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 19108
OriginAS19108 Optimum
Origin codeIGP
Communities13760:3109 36601:150 36601:2001 36601:13760
Updated4d 16h ago
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 19108
OriginAS19108 Optimum
Origin codeIGP
Communities903:900 903:13760
Updated5d 0h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 19108
OriginAS19108 Optimum
Origin codeIGP
Communities36295:100
Updated5d 0h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Jacksonville, FL)Collector-2-COCOA-FL36295 6939 19108
OriginAS19108 Optimum
Origin codeIGP
Communitiesnone
Updated5d 0h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Orlando, FL)Collector-2-COCOA-FL36295 174 19108
OriginAS19108 Optimum
Origin codeIGP
Communities174:21001 174:22013 36295:100 36295:174
Updated8d 17h ago
RPKI

Route origin authorizations

No ROA covers this prefix, so RPKI has nothing to say about who may originate it. Validate another origin.

IRR

Route objects

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

RouteOriginSourceDescriptionMaintained by
66.76.0.0/16AS19108 SUDDENLINK-COMMUNICATIONSRADBSuddenlink CommunicationsMAINT-AS19108
More specific

Prefixes inside 66.76.0.0/16

22 announced prefixes fall inside this one.

Show the 22 prefixes
66.76.0.0/17 AS19108 SUDDENLINK-COMMUNICATIONS66.76.6.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.80.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.114.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.128.0/18 AS19108 SUDDENLINK-COMMUNICATIONS66.76.163.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.173.0/24 AS400947 SMC-ASN66.76.174.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.176.0/20 AS19108 SUDDENLINK-COMMUNICATIONS66.76.192.0/20 AS19108 SUDDENLINK-COMMUNICATIONS66.76.193.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.194.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.202.0/23 AS19108 SUDDENLINK-COMMUNICATIONS66.76.215.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.216.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.217.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.220.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.221.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.222.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.223.0/24 AS19108 SUDDENLINK-COMMUNICATIONS66.76.224.0/20 AS19108 SUDDENLINK-COMMUNICATIONS66.76.240.0/20 AS19108 SUDDENLINK-COMMUNICATIONS
Tools

Check 66.76.0.0/16 live

Looking glassIP to ASN APIRPKI APIIRR API