101.203.0.0/18 - BGP Prefix
IPv4APNICnot announced RPKI Valid
CIDR
101.203.0.0/18
IP Version
IPv4
Addresses
16.3K
Mask
/18 (255.255.192.0)
Country
🇯🇵 Japan
City
Chiyoda
RIR
APNIC
Status
not announced
Allocated
-
Announced BGP Routes
0 of 0 routesRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| This prefix is not announced as a whole. Parts of it are announced as more-specific prefixes, see below. | ||||
More-Specific Announcements
5 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 101.203.0.0/19 | AS59127 NCV - Newmedia Corporation | Valid | - | 2026-10-13 |
| 101.203.0.0/20 | AS59127 NCV - Newmedia Corporation | Valid | - | 2026-10-13 |
| 101.203.16.0/21 | AS59127 NCV - Newmedia Corporation | Valid | - | 2026-10-13 |
| 101.203.24.0/21 | AS59127 NCV - Newmedia Corporation | Valid | - | 2026-10-13 |
| 101.203.32.0/20 | AS59127 NCV - Newmedia Corporation | Valid | - | 2026-10-13 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 101.203.0.0/19 | AS59127 | 🇯🇵JP | allocated |
| 101.203.32.0/20 | AS59127 | 🇯🇵JP | allocated |
| 101.203.48.0/20 | 🇯🇵JP | allocated |
Transfer History
Registry transfers of 101.203.0.0/18, blocks inside it, or blocks containing it.
- 101.203.32.0/20Transfer ·
- 101.203.0.0/19Transfer ·
- 101.203.0.0/18Transfer ·
| Date | Resource | From | To | Type |
|---|---|---|---|---|
| 101.203.32.0/20 | Transfer | |||
| 101.203.0.0/19 | Transfer | |||
| 101.203.0.0/18 | Transfer |
Geolocation
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the APNIC regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/101.203.0.0/18Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/101.203.0.0/18" | jq
External Links