203.243.0.0/18
🇰🇷CIDR
203.243.0.0/18
IP Version
IPv4
Addresses
16.3K
Mask
/18 (255.255.192.0)
Country
🇰🇷 South Korea
City
Seongnam-si (Buljeong-ro)
RIR
APNIC
Status
allocated
Allocated
9/29/1996
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.243.0.0/18 | AS4766KIXS-AS-KR-KR - Korea Telecom | No ROA | RADB | 5/31/2026 |
Covering Prefix
6 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.243.39.0/24 | AS4766KIXS-AS-KR-KR - Korea Telecom | No ROA | — | 5/31/2026 |
| 203.243.1.0/24 | AS17841NCIA-AS-KR-KR - NATIONAL INFORMATION RESOURCES SERVICE | No ROA | — | 5/31/2026 |
| 203.243.41.0/24 | AS18034KANGNUNG-AS-KR-KR - Gangneung-Wonju National University | No ROA | — | 5/31/2026 |
| 203.243.42.0/24 | AS18034KANGNUNG-AS-KR-KR - Gangneung-Wonju National University | No ROA | — | 5/31/2026 |
| 203.243.16.0/24 | AS23575SKB-GOV-KR-KR - SK Broadband Co Ltd | No ROA | — | 5/31/2026 |
| 203.243.15.0/24 | AS23575SKB-GOV-KR-KR - SK Broadband Co Ltd | No ROA | — | 5/31/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS4766 | RADB | MAINT-AS4766 | 11/13/2023 |
More Specific Prefixes
| Prefix | AS | Country | Status |
|---|---|---|---|
| 203.243.16.0/22 | 🇰🇷KR | assigned | |
| 203.243.12.0/22 | 🇰🇷KR | assigned | |
| 203.243.0.0/22 | 🇰🇷KR | assigned | |
| 203.243.22.0/24 | 🇰🇷KR | assigned | |
| 203.243.27.0/24 | 🇰🇷KR | assigned | |
| 203.243.28.0/24 | 🇰🇷KR | assigned | |
| 203.243.34.0/24 | 🇰🇷KR | assigned | |
| 203.243.39.0/24 | AS4766 | 🇰🇷KR | assigned |
| 203.243.44.0/24 | 🇰🇷KR | assigned | |
| 203.243.47.0/24 | 🇰🇷KR | assigned | |
| 203.243.59.0/24 | 🇰🇷KR | assigned | |
| 203.243.5.0/24 | 🇰🇷KR | assigned | |
| 203.243.7.0/24 | 🇰🇷KR | assigned | |
| 203.243.8.0/24 | 🇰🇷KR | assigned | |
| 203.243.10.0/24 | 🇰🇷KR | assigned | |
| 203.243.20.0/24 | 🇰🇷KR | assigned | |
| 203.243.21.0/24 | 🇰🇷KR | assigned | |
| 203.243.23.0/24 | 🇰🇷KR | assigned | |
| 203.243.25.0/24 | 🇰🇷KR | assigned | |
| 203.243.26.0/24 | 🇰🇷KR | assigned | |
| 203.243.29.0/24 | 🇰🇷KR | assigned | |
| 203.243.30.0/24 | 🇰🇷KR | assigned | |
| 203.243.31.0/24 | 🇰🇷KR | assigned | |
| 203.243.32.0/24 | 🇰🇷KR | assigned | |
| 203.243.35.0/24 | 🇰🇷KR | assigned | |
| 203.243.36.0/24 | 🇰🇷KR | assigned | |
| 203.243.37.0/24 | 🇰🇷KR | assigned | |
| 203.243.38.0/24 | 🇰🇷KR | assigned | |
| 203.243.40.0/24 | 🇰🇷KR | assigned | |
| 203.243.41.0/24 | AS18034 | 🇰🇷KR | assigned |
| 203.243.46.0/24 | 🇰🇷KR | assigned | |
| 203.243.48.0/24 | 🇰🇷KR | assigned | |
| 203.243.51.0/24 | 🇰🇷KR | assigned | |
| 203.243.52.0/24 | 🇰🇷KR | assigned | |
| 203.243.53.0/24 | 🇰🇷KR | assigned | |
| 203.243.54.0/24 | 🇰🇷KR | assigned | |
| 203.243.55.0/24 | 🇰🇷KR | assigned | |
| 203.243.56.0/24 | 🇰🇷KR | assigned | |
| 203.243.57.0/24 | 🇰🇷KR | assigned | |
| 203.243.60.0/24 | 🇰🇷KR | assigned | |
| 203.243.4.0/24 | 🇰🇷KR | assigned | |
| 203.243.6.0/24 | 🇰🇷KR | assigned | |
| 203.243.9.0/24 | 🇰🇷KR | assigned | |
| 203.243.11.0/24 | 🇰🇷KR | assigned | |
| 203.243.33.0/24 | 🇰🇷KR | assigned | |
| 203.243.42.0/24 | AS18034 | 🇰🇷KR | assigned |
| 203.243.43.0/24 | 🇰🇷KR | assigned | |
| 203.243.45.0/24 | 🇰🇷KR | assigned | |
| 203.243.58.0/24 | 🇰🇷KR | assigned | |
| 203.243.61.0/24 | 🇰🇷KR | assigned | |
| 203.243.62.0/24 | 🇰🇷KR | assigned | |
| 203.243.50.0/24 | 🇰🇷KR | assigned | |
| 203.243.63.0/24 | 🇰🇷KR | assigned | |
| 203.243.24.0/24 | 🇰🇷KR | assigned | |
| 203.243.49.0/24 | 🇰🇷KR | assigned |
Origin ASN
AS4766
KIXS-AS-KR-KR - Korea Telecom
Geolocation
Country🇰🇷South KoreaKR
RegionGyeonggi-do
CitySeongnam-si (Buljeong-ro)
Coordinates37.3654, 127.1220 ↗
API
Open https://api.ipctl.io/v1/prefix/203.243.0.0/18Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/203.243.0.0/18" | jq
External Links