203.251.128.0/18
🇰🇷CIDR
203.251.128.0/18
IP Version
IPv4
Addresses
16.3K
Mask
/18 (255.255.192.0)
Country
🇰🇷 South Korea
City
Seongnam-si (Jeongja-dong)
RIR
APNIC
Status
allocated
Allocated
9/29/1996
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.251.128.0/18 | AS4766KIXS-AS-KR-KR - Korea Telecom | No ROA | RADB | 6/1/2026 |
Covering Prefix
8 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.251.135.0/24 | AS4766KIXS-AS-KR-KR - Korea Telecom | No ROA | — | 6/1/2026 |
| 203.251.136.0/24 | AS4766KIXS-AS-KR-KR - Korea Telecom | No ROA | — | 6/1/2026 |
| 203.251.137.0/24 | AS4766KIXS-AS-KR-KR - Korea Telecom | No ROA | — | 6/1/2026 |
| 203.251.178.0/24 | AS18308POONGSAN-AS-KR-KR - POONGSAN | No ROA | — | 6/1/2026 |
| 203.251.152.0/24 | AS45399KAL-AS-KR-KR - Hanjin Information Systems Telecommunication Co., Ltd | No ROA | — | 6/1/2026 |
| 203.251.153.0/24 | AS45399KAL-AS-KR-KR - Hanjin Information Systems Telecommunication Co., Ltd | No ROA | — | 6/1/2026 |
| 203.251.154.0/24 | AS45399KAL-AS-KR-KR - Hanjin Information Systems Telecommunication Co., Ltd | No ROA | — | 6/1/2026 |
| 203.251.151.0/24 | AS45399KAL-AS-KR-KR - Hanjin Information Systems Telecommunication Co., Ltd | No ROA | — | 6/1/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS4766 | RADB | MAINT-AS4766 | 11/13/2023 |
Origin ASN
AS4766
KIXS-AS-KR-KR - Korea Telecom
Geolocation
Country🇰🇷South KoreaKR
RegionGyeonggi-do
CitySeongnam-si (Jeongja-dong)
Coordinates37.3644, 127.1160 ↗
API
Open https://api.ipctl.io/v1/prefix/203.251.128.0/18Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/203.251.128.0/18" | jq
External Links