121.237.176.0/21
🇨🇳CIDR
121.237.176.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇨🇳 China
City
Nanjing
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 121.237.176.0/21 | AS134756ChinaNet-NANJING-JISHAN-IDC - CHINANET Nanjing Jishan IDC network | No ROA | RADB | 6/1/2026 |
Covering Prefix
9 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 121.224.0.0/12 | AS4134CHINANET-BACKBONE - No.31,Jin-rong Street | No ROA | — | 6/1/2026 |
| 121.237.177.0/24 | AS134756ChinaNet-NANJING-JISHAN-IDC - CHINANET Nanjing Jishan IDC network | Valid | — | 6/1/2026 |
| 121.237.178.0/24 | AS134756ChinaNet-NANJING-JISHAN-IDC - CHINANET Nanjing Jishan IDC network | Valid | — | 6/1/2026 |
| 121.237.179.0/24 | AS134756ChinaNet-NANJING-JISHAN-IDC - CHINANET Nanjing Jishan IDC network | Valid | — | 6/1/2026 |
| 121.237.176.0/24 | AS134756ChinaNet-NANJING-JISHAN-IDC - CHINANET Nanjing Jishan IDC network | Valid | — | 6/1/2026 |
| 121.237.180.0/24 | AS146966CHINANET-YANGZHOUNORTH-IDC - China Telecom | Valid | — | 6/1/2026 |
| 121.237.181.0/24 | AS146966CHINANET-YANGZHOUNORTH-IDC - China Telecom | Valid | — | 6/1/2026 |
| 121.237.182.0/24 | AS146966CHINANET-YANGZHOUNORTH-IDC - China Telecom | Valid | — | 6/1/2026 |
| 121.237.183.0/24 | AS146966CHINANET-YANGZHOUNORTH-IDC - China Telecom | Valid | — | 6/1/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/121.237.176.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/121.237.176.0/21" | jq
External Links