122.251.0.0/17
🇯🇵CIDR
122.251.0.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇯🇵 Japan
City
Chiyoda
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 122.251.0.0/17 | AS18077C-able - Yamaguchi Cable Vision Co.,Ltd | Valid | — | 6/1/2026 |
Covering Prefix
6 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 122.250.0.0/15 | AS18077C-able - Yamaguchi Cable Vision Co.,Ltd | Valid | — | 6/1/2026 |
| 122.251.0.0/16 | AS18077C-able - Yamaguchi Cable Vision Co.,Ltd | Valid | — | 6/1/2026 |
| 122.251.96.0/19 | AS18077C-able - Yamaguchi Cable Vision Co.,Ltd | Valid | — | 6/1/2026 |
| 122.251.0.0/19 | AS18077C-able - Yamaguchi Cable Vision Co.,Ltd | Valid | — | 6/1/2026 |
| 122.251.32.0/19 | AS18077C-able - Yamaguchi Cable Vision Co.,Ltd | Valid | — | 6/1/2026 |
| 122.251.64.0/19 | AS18077C-able - Yamaguchi Cable Vision Co.,Ltd | Valid | — | 6/1/2026 |
RPKI ROAs
| Prefix | Origin | Max Length | Trust Anchor |
|---|---|---|---|
| 122.250.0.0/15 | AS18077 | /32 | apnic |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/122.251.0.0/17Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/122.251.0.0/17" | jq
External Links