210.121.40.0/21 - SEJONG NETWORKS (AS9848)
CIDR
210.121.40.0/21
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 |
|---|---|---|---|---|
| 210.121.40.0/21 | AS9848 SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | Other IRR | 2026-10-11 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 210.121.0.0/17 | AS9848 SejongTelecom-AS-KR-KR - SEJONG NETWORKS | No ROA | - | 2026-10-11 |
IRR Route Objects
| Origin | Registry | Maintainer | Modified |
|---|---|---|---|
| AS9848 | Other IRR | MAINT-AS4670 | 2026-08-07 |
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/210.121.40.0/21Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/210.121.40.0/21" | jq
External Links