221.239.0.0/18 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 221.239.0.0/18
Prefix
Origin
AS17638 CHINATELECOM-TJ-AS-AP
RPKI
RPKI valid
Size
16,384 addresses
Less specific
none
More specifics
25
IRR route objects
1 exact, 0 covering
In RouteViews
2026-10-16 16:02 UTC
Paths
How 221.239.0.0/18 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
| Origin | AS17638 ASN for TIANJIN Provincial Net of CT |
| Origin code | IGP |
| Communities | 174:21001 174:22013 36601:150 36601:174 36601:2001 |
| Updated | 8d 15h ago |
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 3356 4134 17638
| Origin | AS17638 ASN for TIANJIN Provincial Net of CT |
| Origin code | IGP |
| Communities | 903:900 903:13760 |
| Updated | 8d 23h ago |
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6461 4134 17638
| Origin | AS17638 ASN for TIANJIN Provincial Net of CT |
| Origin code | IGP |
| Communities | 6461:5997 36295:100 36295:6461 |
| Updated | 1d 4h ago |
RPKI
Route origin authorizations
Covered by a ROA authorizing AS17638 to originate 221.239.0.0/18 up to /18. Validate another origin.
| ROA prefix | Max length | Authorized origin | Trust anchor |
|---|---|---|---|
| 221.239.0.0/18 | /18 | AS17638 CHINATELECOM-TJ-AS-AP | 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 |
|---|---|---|---|---|
| 221.239.0.0/18 | AS17638 CHINATELECOM-TJ-AS-AP | RADB | ASN for TIANJIN Provincial Net of CT | MAINT-CT-GNOC |
More specific
Prefixes inside 221.239.0.0/18
25 announced prefixes fall inside this one.
Show the 25 prefixes
221.239.0.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.5.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.6.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.8.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.9.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.16.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.18.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.19.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.21.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.23.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.24.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.26.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.27.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.28.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.29.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.30.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.44.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.45.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.53.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.54.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.55.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.57.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.58.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.59.0/24 AS17638 CHINATELECOM-TJ-AS-AP221.239.62.0/24 AS17638 CHINATELECOM-TJ-AS-AP