ResearchRouting table, looking glass, RPKI & IRR

42.81.0.0/16 Tianjij,300000

Announced by AS58542 Tianjij,300000. RPKI valid Seen by 5 of our 5 looking glass sessions.

Summary

What the table says about 42.81.0.0/16

Prefix
42.81.0.0/16
Origin
AS58542 CHINATELECOM-TIANJIN
RPKI
RPKI valid
Size
65,536 addresses
Less specific
42.80.0.0/15 AS17638 CHINATELECOM-TJ-AS-AP
More specifics
7
IRR route objects
1 exact, 1 covering
In RouteViews
2026-10-14 04:02 UTC
Paths

How 42.81.0.0/16 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 174 4134 58542
OriginAS58542 Tianjij,300000
Origin codeIGP
Communities174:21001 174:22013 36601:150 36601:174 36601:2001
Updated6d 3h ago
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 4134 58542
OriginAS58542 Tianjij,300000
Origin codeIGP
Communities903:900 903:13760
Updated6d 11h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 4134 58542
OriginAS58542 Tianjij,300000
Origin codeIGP
Communities36295:100
Updated6d 11h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Jacksonville, FL)Collector-2-COCOA-FL36295 6939 4134 58542
OriginAS58542 Tianjij,300000
Origin codeIGP
Communitiesnone
Updated6d 12h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Orlando, FL)Collector-2-COCOA-FL36295 174 4134 58542
OriginAS58542 Tianjij,300000
Origin codeIGP
Communities174:21001 174:22013 36295:100 36295:174
Updated10d 5h ago
RPKI

Route origin authorizations

Covered by a ROA authorizing AS58542 to originate 42.81.0.0/16 up to /16. Validate another origin.

ROA prefixMax lengthAuthorized originTrust anchor
42.81.0.0/16/16AS58542 CHINATELECOM-TIANJINAPNIC
IRR

Route objects

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

RouteOriginSourceDescriptionMaintained by
42.81.0.0/16AS58542 CHINATELECOM-TIANJINRADBchinanet/CN2 TianJin province networkMAINT-AS58542
42.80.0.0/15 coveringAS17638 CHINATELECOM-TJ-AS-APRADBASN for TIANJIN Provincial Net of CTMAINT-CT-GNOC
Less specific

Covering prefixes

Announced prefixes that contain this one, most specific first.

42.80.0.0/15 AS17638 CHINATELECOM-TJ-AS-AP
More specific

Prefixes inside 42.81.0.0/16

7 announced prefixes fall inside this one.

Show the 7 prefixes
42.81.138.0/24 AS58542 CHINATELECOM-TIANJIN42.81.168.0/24 AS58542 CHINATELECOM-TIANJIN42.81.169.0/24 AS58542 CHINATELECOM-TIANJIN42.81.170.0/24 AS58542 CHINATELECOM-TIANJIN42.81.171.0/24 AS58542 CHINATELECOM-TIANJIN42.81.172.0/24 AS58542 CHINATELECOM-TIANJIN42.81.173.0/24 AS58542 CHINATELECOM-TIANJIN
Tools

Check 42.81.0.0/16 live

Looking glassIP to ASN APIRPKI APIIRR API