103.255.21.0/24
π―π΅IPv4APNICassignedNo ROA
CIDR
103.255.21.0/24
IP Version
IPv4
Addresses
256
Mask
/24 (255.255.255.0)
Country
π―π΅ Japan
City
Shinjuku (3-chΕme)
RIR
APNIC
Status
assigned
Allocated
-
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
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 103.255.20.0/22 | AS2514InfoSphere - NTT PC Communications, Inc. | No ROA | β | 6/1/2026 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 103.255.21.176/28 | π―π΅JP | assigned | |
| 103.255.21.80/28 | π―π΅JP | assigned | |
| 103.255.21.48/28 | π―π΅JP | assigned | |
| 103.255.21.96/28 | π―π΅JP | assigned | |
| 103.255.21.0/28 | π―π΅JP | assigned | |
| 103.255.21.16/28 | π―π΅JP | assigned | |
| 103.255.21.32/28 | π―π΅JP | assigned | |
| 103.255.21.64/28 | π―π΅JP | assigned | |
| 103.255.21.112/28 | π―π΅JP | assigned | |
| 103.255.21.128/28 | π―π΅JP | assigned | |
| 103.255.21.144/28 | π―π΅JP | assigned | |
| 103.255.21.160/28 | π―π΅JP | assigned | |
| 103.255.21.192/28 | π―π΅JP | assigned | |
| 103.255.21.208/28 | π―π΅JP | assigned | |
| 103.255.21.224/28 | π―π΅JP | assigned | |
| 103.255.21.240/28 | π―π΅JP | assigned |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/103.255.21.0/24Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/103.255.21.0/24" | jq
External Links