120.81.136.0/21
🇨🇳CIDR
120.81.136.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇨🇳 China
City
Shenzhen
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 120.81.136.0/21 | AS17623CNCGROUP-SZ - China Unicom Shenzen network | No ROA | APNICRADB | 6/13/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 120.80.0.0/13 | AS17816CHINA169-GZ - China Unicom IP network China169 Guangdong province | No ROA | — | 6/13/2026 |
| 120.81.136.0/24 | AS17623CNCGROUP-SZ - China Unicom Shenzen network | Valid | — | 6/13/2026 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 120.81.137.0/29 | 🇨🇳CN | assigned |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/120.81.136.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/120.81.136.0/21" | jq
External Links