123.172.0.0/19 China Telecom Next Generation Carrier Network
Announced by AS4809 China Telecom Next Generation Carrier Network. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 123.172.0.0/19
Prefix
Origin
AS4809 CHINATELECOM-CORE-WAN-CN2
RPKI
RPKI valid
Size
8,192 addresses
Less specific
More specifics
0
IRR route objects
1 exact, 1 covering
In RouteViews
2026-10-14 16:02 UTC
Paths
How 123.172.0.0/19 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 3356 4809
| Origin | AS4809 China Telecom Next Generation Carrier Network |
| Origin code | IGP |
| Communities | 174:21000 174:22013 36601:150 36601:174 36601:2001 |
| Updated | 12h 23m ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 4809
| Origin | AS4809 China Telecom Next Generation Carrier Network |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 6d 22h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 4809
| Origin | AS4809 China Telecom Next Generation Carrier Network |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 6d 23h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS4809 to originate 123.172.0.0/19 up to /19. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 123.172.0.0/19 | /19 | AS4809 CHINATELECOM-CORE-WAN-CN2 | APNIC |
| 123.172.0.0/15 | /15 | AS4134 CHINANET-BACKBONE | APNIC |
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 |
|---|---|---|---|---|
| 123.172.0.0/19 | AS4809 CHINATELECOM-CORE-WAN-CN2 | RADB | China Telecom Global Limited | MAINT-CT-GNOC |
| 123.172.0.0/15 covering | AS4134 CHINANET-BACKBONE | RADB | China Telecom Network | MAINT-CT-GNOC |
Less specific
Covering prefixes
Announced prefixes that contain this one, most specific first.