121.100.56.0/21
🇯🇵CIDR
121.100.56.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇯🇵 Japan
City
Minato-ku
RIR
APNIC
Status
allocated
Allocated
1/10/2011
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| This prefix is not currently announced in BGP. See covering prefix below. | ||||
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 121.100.56.0/22 | AS18097DCN - D.C.N. Corporation | No ROA | — | 5/31/2026 |
| 121.100.60.0/22 | AS18097DCN - D.C.N. Corporation | No ROA | — | 5/31/2026 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 121.100.58.4/32 | 🇯🇵JP | assigned | |
| 121.100.58.16/32 | 🇯🇵JP | assigned | |
| 121.100.58.26/32 | 🇯🇵JP | assigned | |
| 121.100.58.27/32 | 🇯🇵JP | assigned | |
| 121.100.58.29/32 | 🇯🇵JP | assigned | |
| 121.100.58.32/32 | 🇯🇵JP | assigned | |
| 121.100.58.34/32 | 🇯🇵JP | assigned | |
| 121.100.58.35/32 | 🇯🇵JP | assigned | |
| 121.100.58.36/32 | 🇯🇵JP | assigned | |
| 121.100.58.40/32 | 🇯🇵JP | assigned | |
| 121.100.58.45/32 | 🇯🇵JP | assigned | |
| 121.100.58.48/32 | 🇯🇵JP | assigned | |
| 121.100.58.57/32 | 🇯🇵JP | assigned | |
| 121.100.58.61/32 | 🇯🇵JP | assigned | |
| 121.100.58.63/32 | 🇯🇵JP | assigned | |
| 121.100.58.70/32 | 🇯🇵JP | assigned | |
| 121.100.58.76/32 | 🇯🇵JP | assigned | |
| 121.100.58.80/32 | 🇯🇵JP | assigned | |
| 121.100.58.89/32 | 🇯🇵JP | assigned | |
| 121.100.58.90/32 | 🇯🇵JP | assigned | |
| 121.100.58.100/32 | 🇯🇵JP | assigned | |
| 121.100.58.102/32 | 🇯🇵JP | assigned | |
| 121.100.58.107/32 | 🇯🇵JP | assigned | |
| 121.100.58.110/32 | 🇯🇵JP | assigned | |
| 121.100.58.121/32 | 🇯🇵JP | assigned | |
| 121.100.58.122/32 | 🇯🇵JP | assigned | |
| 121.100.58.123/32 | 🇯🇵JP | assigned | |
| 121.100.58.126/32 | 🇯🇵JP | assigned | |
| 121.100.58.127/32 | 🇯🇵JP | assigned | |
| 121.100.58.132/32 | 🇯🇵JP | assigned | |
| 121.100.58.135/32 | 🇯🇵JP | assigned | |
| 121.100.58.140/32 | 🇯🇵JP | assigned | |
| 121.100.58.141/32 | 🇯🇵JP | assigned | |
| 121.100.58.143/32 | 🇯🇵JP | assigned | |
| 121.100.58.147/32 | 🇯🇵JP | assigned | |
| 121.100.58.149/32 | 🇯🇵JP | assigned | |
| 121.100.58.150/32 | 🇯🇵JP | assigned | |
| 121.100.58.153/32 | 🇯🇵JP | assigned | |
| 121.100.58.155/32 | 🇯🇵JP | assigned | |
| 121.100.58.157/32 | 🇯🇵JP | assigned | |
| 121.100.58.160/32 | 🇯🇵JP | assigned | |
| 121.100.58.168/32 | 🇯🇵JP | assigned | |
| 121.100.58.169/32 | 🇯🇵JP | assigned | |
| 121.100.58.171/32 | 🇯🇵JP | assigned | |
| 121.100.58.174/32 | 🇯🇵JP | assigned | |
| 121.100.58.176/32 | 🇯🇵JP | assigned | |
| 121.100.58.177/32 | 🇯🇵JP | assigned | |
| 121.100.58.179/32 | 🇯🇵JP | assigned | |
| 121.100.58.183/32 | 🇯🇵JP | assigned | |
| 121.100.58.187/32 | 🇯🇵JP | assigned | |
| 121.100.58.188/32 | 🇯🇵JP | assigned | |
| 121.100.58.189/32 | 🇯🇵JP | assigned | |
| 121.100.58.200/32 | 🇯🇵JP | assigned | |
| 121.100.58.203/32 | 🇯🇵JP | assigned | |
| 121.100.58.204/32 | 🇯🇵JP | assigned | |
| 121.100.58.207/32 | 🇯🇵JP | assigned | |
| 121.100.58.211/32 | 🇯🇵JP | assigned | |
| 121.100.58.213/32 | 🇯🇵JP | assigned | |
| 121.100.58.216/32 | 🇯🇵JP | assigned | |
| 121.100.58.217/32 | 🇯🇵JP | assigned | |
| 121.100.58.219/32 | 🇯🇵JP | assigned | |
| 121.100.58.220/32 | 🇯🇵JP | assigned | |
| 121.100.58.221/32 | 🇯🇵JP | assigned | |
| 121.100.58.226/32 | 🇯🇵JP | assigned | |
| 121.100.58.232/32 | 🇯🇵JP | assigned | |
| 121.100.58.235/32 | 🇯🇵JP | assigned | |
| 121.100.58.236/32 | 🇯🇵JP | assigned | |
| 121.100.58.237/32 | 🇯🇵JP | assigned | |
| 121.100.58.246/32 | 🇯🇵JP | assigned | |
| 121.100.58.250/32 | 🇯🇵JP | assigned | |
| 121.100.58.251/32 | 🇯🇵JP | assigned | |
| 121.100.58.254/32 | 🇯🇵JP | assigned | |
| 121.100.58.255/32 | 🇯🇵JP | assigned | |
| 121.100.59.0/32 | 🇯🇵JP | assigned | |
| 121.100.59.5/32 | 🇯🇵JP | assigned | |
| 121.100.59.7/32 | 🇯🇵JP | assigned | |
| 121.100.59.10/32 | 🇯🇵JP | assigned | |
| 121.100.59.13/32 | 🇯🇵JP | assigned | |
| 121.100.59.14/32 | 🇯🇵JP | assigned | |
| 121.100.59.24/32 | 🇯🇵JP | assigned | |
| 121.100.59.25/32 | 🇯🇵JP | assigned | |
| 121.100.59.26/32 | 🇯🇵JP | assigned | |
| 121.100.59.27/32 | 🇯🇵JP | assigned | |
| 121.100.59.29/32 | 🇯🇵JP | assigned | |
| 121.100.59.32/32 | 🇯🇵JP | assigned | |
| 121.100.59.35/32 | 🇯🇵JP | assigned | |
| 121.100.59.43/32 | 🇯🇵JP | assigned | |
| 121.100.59.46/32 | 🇯🇵JP | assigned | |
| 121.100.59.53/32 | 🇯🇵JP | assigned | |
| 121.100.59.54/32 | 🇯🇵JP | assigned | |
| 121.100.59.55/32 | 🇯🇵JP | assigned | |
| 121.100.59.60/32 | 🇯🇵JP | assigned | |
| 121.100.59.62/32 | 🇯🇵JP | assigned | |
| 121.100.59.65/32 | 🇯🇵JP | assigned | |
| 121.100.59.70/32 | 🇯🇵JP | assigned | |
| 121.100.59.73/32 | 🇯🇵JP | assigned | |
| 121.100.59.77/32 | 🇯🇵JP | assigned | |
| 121.100.59.81/32 | 🇯🇵JP | assigned | |
| 121.100.59.83/32 | 🇯🇵JP | assigned | |
| 121.100.62.213/32 | 🇯🇵JP | assigned |
Origin ASN
AS56033
Geolocation
API
Open https://api.ipctl.io/v1/prefix/121.100.56.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/121.100.56.0/21" | jq
External Links