ResearchRouting table, looking glass, RPKI & IRR

203.243.128.0/21 SEJONG NETWORKS

Announced by AS9848 SEJONG NETWORKS. RPKI not found Seen by 5 of our 5 looking glass sessions.

Summary

What the table says about 203.243.128.0/21

Prefix
203.243.128.0/21
Origin
AS9848 SejongTelecom-AS-KR-KR
RPKI
RPKI not found
Size
2,048 addresses
Less specific
203.243.128.0/17 AS9848 SejongTelecom-AS-KR-KR
More specifics
3
IRR route objects
2 exact, 2 covering
In RouteViews
2026-10-14 20:02 UTC
Paths

How 203.243.128.0/21 is reached

Every path our looking glass collectors hold for this exact prefix. Open one for its attributes, or see them all side by side in the looking glass.

AS36601 TNT (TNT - Tampa, FL)Collector-1-TAMPA-FL36601 174 58453 9848
OriginAS9848 SEJONG NETWORKS
Origin codeIGP
Communities174:21001 174:22013 36601:150 36601:174 36601:2001
Updated16h 6m ago
AS903 UNIFIED-COMMUNICATIONS-TECHNOLOGIES (UCT - Valdosta, GA)Collector-2-COCOA-FL903 13760 58453 9848
OriginAS9848 SEJONG NETWORKS
Origin codeIGP
Communities903:900 903:13760
Updated7d 2h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Cocoa, FL)Collector-2-COCOA-FL36295 6939 9848
OriginAS9848 SEJONG NETWORKS
Origin codeIGP
Communities36295:100
Updated7d 2h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Jacksonville, FL)Collector-2-COCOA-FL36295 6939 9848
OriginAS9848 SEJONG NETWORKS
Origin codeIGP
Communitiesnone
Updated7d 2h ago
AS36295 FLORIDA-HIGH-SPEED-INTERNET (FLHSI - Orlando, FL)Collector-2-COCOA-FL36295 174 58453 9848
OriginAS9848 SEJONG NETWORKS
Origin codeIGP
Communities174:21001 174:22013 36295:100 36295:174
Updated10d 19h ago
RPKI

Route origin authorizations

No ROA covers this prefix, so RPKI has nothing to say about who may originate it. Validate another origin.

IRR

Route objects

Registered in the IRR for this prefix and the ones covering it. Look it up live.

RouteOriginSourceDescriptionMaintained by
203.243.128.0/21AS9848 SejongTelecom-AS-KR-KRRADBSejongTelecom.co.ltdMAINT-AS4670
203.243.128.0/21AS23584 HYROADPUSAN-AS-KR-KRRADBPACNET (proxy-registered route object)MAINT-AS4637
203.243.128.0/17 coveringAS9848 SejongTelecom-AS-KR-KRRADBSejong TelecomMAINT-AS9318
203.243.128.0/17 coveringAS9848 SejongTelecom-AS-KR-KRREACHREACH (Customer Route)MAINT-REACH-NOC
Less specific

Covering prefixes

Announced prefixes that contain this one, most specific first.

203.243.128.0/17 AS9848 SejongTelecom-AS-KR-KR
More specific

Prefixes inside 203.243.128.0/21

3 announced prefixes fall inside this one.

Show the 3 prefixes
203.243.128.0/24 AS141167 AGOTOZHKLIMITED-AS-AP203.243.132.0/24 AS141167 AGOTOZHKLIMITED-AS-AP203.243.133.0/24 AS136897 ENJOYVC-AS-AP
Tools

Check 203.243.128.0/21 live

Looking glassIP to ASN APIRPKI APIIRR API