121.199.0.0/16
🇨🇳CIDR
121.199.0.0/16
IP Version
IPv4
Addresses
65.5K
Mask
/16 (255.255.0.0)
Country
🇨🇳 China
City
Hangzhou
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 121.199.0.0/16 | AS37963ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd. | Valid | — | 6/13/2026 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 121.196.0.0/14 | AS37963ALIBABA-CN-NET - Hangzhou Alibaba Advertising Co.,Ltd. | Valid | — | 6/13/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 121.196.0.0/14 | AS37963 | /24 | apnic |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/121.199.0.0/16Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/121.199.0.0/16" | jq
External Links