221.133.52.0/23
🇰🇷IPv4APNICallocatedNo ROA
CIDR
221.133.52.0/23
IP Version
IPv4
Addresses
512
Mask
/23 (255.255.254.0)
Country
🇰🇷 South Korea
City
Yongsan-dong (Nonhyeon-ro 81-gil)
RIR
APNIC
Status
allocated
Allocated
8/3/2006
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 |
|---|---|---|---|---|
| 221.133.48.0/21 | AS9712KPIN-AS-KR-KR - INet Technologies Co., Ltd. | No ROA | — | 6/2/2026 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 221.133.53.0/24 | 🇰🇷KR | assigned | |
| 221.133.52.0/24 | 🇰🇷KR | assigned |
Geolocation
Country🇰🇷South KoreaKR
RegionSeoul
CityYongsan-dong (Nonhyeon-ro 81-gil)
Coordinates37.4980, 127.0370 ↗
API
Open https://api.ipctl.io/v1/prefix/221.133.52.0/23Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/221.133.52.0/23" | jq
External Links