203.181.192.0/18
🇯🇵CIDR
203.181.192.0/18
IP Version
IPv4
Addresses
16.3K
Mask
/18 (255.255.192.0)
Country
🇯🇵 Japan
City
Chiyoda City
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.181.192.0/18 | AS2907SINET-AS - Research Organization of Information and Systems, National Institute of Informatics | No ROA | — | 6/1/2026 |
Covering Prefix
2 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.181.194.0/23 | AS7660APAN-JP - Asia Pacific Advanced Network - Japan | Valid | — | 6/1/2026 |
| 203.181.248.0/23 | AS7660APAN-JP - Asia Pacific Advanced Network - Japan | Valid | — | 6/1/2026 |
Origin ASN
AS2907
SINET-AS - Research Organization of Information and Systems, National Institute of Informatics
Geolocation
API
Open https://api.ipctl.io/v1/prefix/203.181.192.0/18Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/203.181.192.0/18" | jq
External Links