153.121.128.0/17
🇯🇵IPv4APNICallocated RPKI Valid
CIDR
153.121.128.0/17
IP Version
IPv4
Addresses
32.7K
Mask
/17 (255.255.128.0)
Country
🇯🇵 Japan
City
Ishikari
RIR
APNIC
Status
allocated
Allocated
3/2/2011
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
7 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 153.121.128.0/18 | AS7684SAKURA-A - SAKURA Internet Inc. | Valid | — | 6/13/2026 |
| 153.121.224.0/20 | AS59092KRONOS - kronos.Co.,Ltd. | No ROA | — | 6/13/2026 |
| 153.121.240.0/21 | AS59092KRONOS - kronos.Co.,Ltd. | No ROA | — | 6/13/2026 |
| 153.121.248.0/22 | AS59092KRONOS - kronos.Co.,Ltd. | No ROA | — | 6/13/2026 |
| 153.121.252.0/23 | AS59092KRONOS - kronos.Co.,Ltd. | No ROA | — | 6/13/2026 |
| 153.121.255.0/24 | AS10013FBDC - FreeBit Co.,Ltd. | No ROA | — | 6/13/2026 |
| 153.121.254.0/24 | AS59092KRONOS - kronos.Co.,Ltd. | No ROA | — | 6/13/2026 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 153.121.128.0/18 | AS7684 | 🇯🇵JP | assigned |
| 153.121.192.0/18 | 🇯🇵JP | assigned |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/153.121.128.0/17Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/153.121.128.0/17" | jq
External Links