ResearchRouting table, looking glass, RPKI & IRR

123.151.0.0/17 ASN for TIANJIN Provincial Net of CT

Announced by AS17638 ASN for TIANJIN Provincial Net of CT. RPKI valid Seen by 5 of our 5 looking glass sessions.

Summary

What the table says about 123.151.0.0/17

Prefix
123.151.0.0/17
Origin
AS17638 CHINATELECOM-TJ-AS-AP
RPKI
RPKI valid
Size
32,768 addresses
Less specific
123.151.0.0/16 AS17638 CHINATELECOM-TJ-AS-AP
More specifics
26
IRR route objects
1 exact, 2 covering
In RouteViews
2026-10-14 04:02 UTC
Paths

How 123.151.0.0/17 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 17638
OriginAS17638 ASN for TIANJIN Provincial Net of CT
Origin codeIGP
Communities174:21001 174:22013 36601:150 36601:174 36601:2001
Updated6d 2h ago
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 4134 17638
OriginAS17638 ASN for TIANJIN Provincial Net of CT
Origin codeIGP
Communities903:900 903:13760
Updated6d 11h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 4134 17638
OriginAS17638 ASN for TIANJIN Provincial Net of CT
Origin codeIGP
Communities36295:100
Updated6d 11h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Jacksonville, FL)Collector-2-COCOA-FL36295 174 4134 17638
OriginAS17638 ASN for TIANJIN Provincial Net of CT
Origin codeIGP
Communities174:21001 174:22013
Updated6d 11h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Orlando, FL)Collector-2-COCOA-FL36295 174 4134 17638
OriginAS17638 ASN for TIANJIN Provincial Net of CT
Origin codeIGP
Communities174:21001 174:22013 36295:100 36295:174
Updated10d 4h ago
RPKI

Route origin authorizations

Covered by a ROA authorizing AS17638 to originate 123.151.0.0/17 up to /17. Validate another origin.

ROA prefixMax lengthAuthorized originTrust anchor
123.151.0.0/17/17AS17638 CHINATELECOM-TJ-AS-APAPNIC
IRR

Route objects

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

RouteOriginSourceDescriptionMaintained by
123.151.0.0/17AS17638 CHINATELECOM-TJ-AS-APRADBASN for TIANJIN Provincial Net of CTMAINT-CT-GNOC
123.151.0.0/16 coveringAS17638 CHINATELECOM-TJ-AS-APRADBASN for TIANJIN Provincial Net of CTMAINT-CT-GNOC
123.150.0.0/15 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.

123.151.0.0/16 AS17638 CHINATELECOM-TJ-AS-AP123.150.0.0/15 AS17638 CHINATELECOM-TJ-AS-AP
More specific

Prefixes inside 123.151.0.0/17

26 announced prefixes fall inside this one.

Show the 26 prefixes
123.151.0.0/21 AS17638 CHINATELECOM-TJ-AS-AP123.151.8.0/24 AS58542 CHINATELECOM-TIANJIN123.151.9.0/24 AS58542 CHINATELECOM-TIANJIN123.151.10.0/23 AS58542 CHINATELECOM-TIANJIN123.151.12.0/22 AS58542 CHINATELECOM-TIANJIN123.151.17.0/24 AS17638 CHINATELECOM-TJ-AS-AP123.151.20.0/24 AS132536 CHINANET-TIANJIN-MAN-NEW123.151.21.0/24 AS17638 CHINATELECOM-TJ-AS-AP123.151.24.0/24 AS17638 CHINATELECOM-TJ-AS-AP123.151.26.0/23 AS58542 CHINATELECOM-TIANJIN123.151.39.0/24 AS58542 CHINATELECOM-TIANJIN123.151.40.0/24 AS58542 CHINATELECOM-TIANJIN123.151.42.0/24 AS58542 CHINATELECOM-TIANJIN123.151.46.0/24 AS58542 CHINATELECOM-TIANJIN123.151.47.0/24 AS58542 CHINATELECOM-TIANJIN123.151.48.0/20 AS58542 CHINATELECOM-TIANJIN123.151.64.0/21 AS58542 CHINATELECOM-TIANJIN123.151.72.0/22 AS58542 CHINATELECOM-TIANJIN123.151.76.0/22 AS58542 CHINATELECOM-TIANJIN123.151.89.0/24 AS17638 CHINATELECOM-TJ-AS-AP123.151.92.0/22 AS58542 CHINATELECOM-TIANJIN123.151.96.0/20 AS58542 CHINATELECOM-TIANJIN123.151.112.0/24 AS17638 CHINATELECOM-TJ-AS-AP123.151.113.0/24 AS17638 CHINATELECOM-TJ-AS-AP123.151.124.0/24 AS132536 CHINANET-TIANJIN-MAN-NEW123.151.126.0/23 AS17638 CHINATELECOM-TJ-AS-AP
Tools

Check 123.151.0.0/17 live

Looking glassIP to ASN APIRPKI APIIRR API