210.21.0.0/17 China Unicom Guangzhou network
Announced by AS17622 China Unicom Guangzhou network. RPKI valid Seen by 5 of our 5 looking glass sessions.
Summary
What the table says about 210.21.0.0/17
Prefix
Origin
AS17622 CNCGROUP-GZ
RPKI
RPKI valid
Size
32,768 addresses
Less specific
none
More specifics
12
IRR route objects
7 exact, 1 covering
In RouteViews
2026-10-13 17:13 UTC
Paths
How 210.21.0.0/17 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 13760 3356 4837 17622
| Origin | AS17622 China Unicom Guangzhou network |
| Origin code | IGP |
| Communities | 3356:3 3356:22 3356:100 3356:123 3356:575 3356:901 3356:2003 36601:150 36601:2001 36601:13760 |
| Updated | 5d 8h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 4837 17622
| Origin | AS17622 China Unicom Guangzhou network |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 6d 1h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 4837 17622
| Origin | AS17622 China Unicom Guangzhou network |
| Origin code | IGP |
| Communities | 36295:100 |
| Updated | 6d 1h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS17622 to originate 210.21.0.0/17 up to /17. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 210.21.0.0/17 | /17 | AS17622 CNCGROUP-GZ | 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 |
|---|---|---|---|---|
| 210.21.0.0/17 | AS17622 CNCGROUP-GZ | APNIC | China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street | MAINT-CNCGROUP-RR |
| 210.21.0.0/17 | AS17816 CHINA169-GZ | APNIC | CNC Group CHINA169 Guangdong Province Network | MAINT-CNCGROUP-RR |
| 210.21.0.0/17 | AS9929 CUII | LEVEL3 | CNC Route Object | CHINANETCOM-MNT |
| 210.21.0.0/17 | AS17621 CNCGROUP-SH | LEVEL3 | CNC Route Object-GZ MAN | CHINANETCOM-MNT |
| 210.21.0.0/17 | AS17622 CNCGROUP-GZ | LEVEL3 | CNC Route Object-GZ MAN | CHINANETCOM-MNT |
| 210.21.0.0/17 | AS17622 CNCGROUP-GZ | NTTCOM | CMI IP Transit | MAINT-CMI-INT-HK |
| 210.21.0.0/17 | AS17622 CNCGROUP-GZ | RADB | CMI (Customer Route) | MAINT-AS58453 |
| 210.21.0.0/16 covering | AS9929 CUII | APNIC | CNC Group CncNet | MAINT-CNCGROUP-RR |
More specific
Prefixes inside 210.21.0.0/17
12 announced prefixes fall inside this one.
Show the 12 prefixes
210.21.0.0/18 AS17622 CNCGROUP-GZ210.21.4.0/24 AS17622 CNCGROUP-GZ210.21.8.0/22 AS17622 CNCGROUP-GZ210.21.17.0/24 AS17622 CNCGROUP-GZ210.21.32.0/19 AS17622 CNCGROUP-GZ210.21.50.0/24 AS17622 CNCGROUP-GZ210.21.51.0/24 AS17622 CNCGROUP-GZ210.21.64.0/18 AS17622 CNCGROUP-GZ210.21.110.0/23 AS17622 CNCGROUP-GZ210.21.121.0/24 AS17622 CNCGROUP-GZ210.21.124.0/24 AS17622 CNCGROUP-GZ210.21.127.0/24 AS17622 CNCGROUP-GZ