Home Prefix Lookup210.121.0.0/17

210.121.0.0/17 - SEJONGTELECOM KR SEJONG NETWORKS (AS9848)

IPv4APNICallocatedAS9848SEJONGTELECOM-AS-KR SEJONG NETWORKSNo ROA

CIDR

210.121.0.0/17

IP Version

IPv4

Addresses

32.7K

Mask

/17 (255.255.128.0)

Country

🇰🇷 South Korea

City

Chungju-si (Yongsan-dong)

RIR

APNIC

Status

allocated

Allocated

1996-11-26

Announced BGP Routes

1 of 1 route

RPKI:

IRR:

Swipe sideways to see all columns →

Prefix	Origin AS	RPKI	IRR	Last Seen
210.121.0.0/17	AS9848 SEJONGTELECOM-AS-KR SEJONG NETWORKS	No ROA	Other IRR	2026-10-11

More-Specific Announcements

13 more-specific announcements

Prefix	Origin AS	RPKI	IRR	Last Seen
210.121.0.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.8.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.16.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.40.0/21	AS9848 SEJONGTELECOM-AS-KR SEJONG NETWORKS	No ROA	-	2026-10-11
210.121.56.0/21	AS9848 SEJONGTELECOM-AS-KR SEJONG NETWORKS	No ROA	-	2026-10-11
210.121.72.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.80.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.88.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.96.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.104.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.106.0/24	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.112.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11
210.121.120.0/21	AS45374 CCS-AS-KR CCS	No ROA	-	2026-10-11

IRR Route Objects

Origin	Registry	Maintainer	Modified
AS9848	Other IRR	MAINT-AS4766	2023-11-13

Origin ASN

AS9848

SEJONGTELECOM-AS-KR SEJONG NETWORKS

Related Prefixes

More prefixes of AS9848

All prefixes of AS9848 →

Geolocation

Country🇰🇷South KoreaKR

RegionNorth Chungcheong

CityChungju-si (Yongsan-dong)

Coordinates36.9625, 127.9420 ↗

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

GEThttps://api.ipctl.io/v1/prefix/210.121.0.0/17

Returns prefix allocation, BGP routes, and more-specific subnets.

curl -s "https://api.ipctl.io/v1/prefix/210.121.0.0/17" | jq

External Links

RIPEstat