IPv4 prefix
121.31.0.0/16
- IP Prefix (CIDR)
- 121.31.0.0/16
- Subnet Mask
- 255.255.0.0
- Address Count
- 65,536
- Handle
- IRT-CU-CN
- Country
-
China (CN)
- Address
- No.21,Financial Street Beijing,100033 P.R.China
- Registry
- APNIC
- Registered Prefix
- 121.31.0.0/16 (121.31.0.0 - 121.31.255.255)
| Announced Prefix | Relationship | Origin ASN | Description | Country | First Address | Last Address |
|---|---|---|---|---|---|---|
| 121.16.0.0/12 | Covering | AS4837 | CHINA UNICOM China169 Backbone |
China (CN)
|
121.16.0.0 | 121.31.255.255 |
| 121.31.28.0/22 | More specific | AS140886 | China Unicom |
China (CN)
|
121.31.28.0 | 121.31.31.255 |
| 121.31.40.0/22 | More specific | AS140886 | China Unicom |
China (CN)
|
121.31.40.0 | 121.31.43.255 |