203.243.128.0/21 - SEJONGTELECOM KR SEJONG NETWORKS (AS9848)
CIDR
203.243.128.0/21
IP Version
IPv4
Addresses
2K
Mask
/21 (255.255.248.0)
Country
🇰🇷 South Korea
City
Gwacheon-si (Gwacheon-daero)
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
Swipe sideways to see all columns →
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.243.128.0/21 | AS9848 SEJONGTELECOM-AS-KR SEJONG NETWORKS | No ROA | Other IRR | 2026-10-11 |
Related Announcements
1 less-specific, 3 more-specific announcements| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 203.243.128.0/17 | AS9848 SEJONGTELECOM-AS-KR SEJONG NETWORKS | No ROA | - | 2026-10-11 |
| 203.243.128.0/24 | AS141167 AGOTOZHKLIMITED-AS-AP AgotoZ HK Limited | No ROA | - | 2026-10-11 |
| 203.243.132.0/24 | AS141167 AGOTOZHKLIMITED-AS-AP AgotoZ HK Limited | No ROA | - | 2026-10-11 |
| 203.243.133.0/24 | AS136897 ENJOYVC-AS-AP Enjoyvc Cloud Group Limited. | No ROA | - | 2026-10-11 |
Related Prefixes
Geolocation
Country🇰🇷South KoreaKR
RegionGyeonggi-do
CityGwacheon-si (Gwacheon-daero)
Coordinates37.4041, 126.9780 ↗
Learn more
- RPKI and ROAs explainedWhat RPKI valid, invalid and no ROA mean
- RPKI validatorCheck ROA coverage for any prefix or ASN
- What is BGP?How prefixes are announced and routed
- More-specific prefixesGlossary: covering and more-specific routes
- IPv4 transfers in the APNIC regionWho bought and sold address space recently
API
Open https://api.ipctl.io/v1/prefix/203.243.128.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/203.243.128.0/21" | jq
External Links