203.236.128.0/18
🇰🇷CIDR
203.236.128.0/18
IP Version
IPv4
Addresses
16.3K
Mask
/18 (255.255.192.0)
Country
🇰🇷 South Korea
City
Seocho (Seocho-dong)
RIR
APNIC
Status
allocated
Allocated
9/29/1996
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.236.128.0/18 | AS9848SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | RADB | 6/1/2026 |
Covering Prefix
12 less-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.236.144.0/20 | AS9848SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | — | 6/1/2026 |
| 203.236.176.0/22 | AS9973BSITC-AS-KR-KR - BSITC | No ROA | — | 6/1/2026 |
| 203.236.188.0/22 | AS23584HYROADPUSAN-AS-KR-KR - PUSAN CABLE TV SYSTEM CO., LTD. | No ROA | — | 6/1/2026 |
| 203.236.135.0/24 | AS9845CJCKN-AS-KR-KR - LG HelloVision Corp. | No ROA | — | 6/1/2026 |
| 203.236.148.0/24 | AS9848SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | — | 6/1/2026 |
| 203.236.151.0/24 | AS9848SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | — | 6/1/2026 |
| 203.236.154.0/24 | AS9848SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | — | 6/1/2026 |
| 203.236.158.0/24 | AS9848SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | — | 6/1/2026 |
| 203.236.157.0/24 | AS9848SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | — | 6/1/2026 |
| 203.236.144.0/24 | AS9848SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | — | 6/1/2026 |
| 203.236.162.0/24 | AS23588KEP-AS-KR-KR - KAKAO Enterprise | No ROA | — | 6/1/2026 |
| 203.236.146.0/24 | AS138195MOACKCOLTD-AS-AP - MOACK.Co.LTD | No ROA | — | 6/1/2026 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS9848 | RADB | MAINT-AS4637 | 11/13/2023 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/203.236.128.0/18Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/203.236.128.0/18" | jq
External Links