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AS9631 youngsan university

South Korea YSU-AS-KR APNIC 37 IPv4 prefixes 0 IPv6 prefixes
IPv4 addresses
8,512
IPv6 /48 networks
0
RPKI
0 valid37 no ROA
Peers and downstreams
0

Holder

AS name
YSU-AS-KR
Description
youngsan university
Organisation
youngsan university
Abuse contact
Not published
Assigned
1999-08-17

Upstream graph

Upstreams and their upstreams, from BGP paths
AS6939 Hurricane Electric LLC AS6939 · US Hurricane Electric LLC AS174 AS174 AS174 AS174 AS3356 Level 3 Parent, LLC AS3356 · US Level 3 Parent, LLC AS1299 Arelion Sweden AB AS1299 · SE Arelion Sweden AB AS6057 Administracion Nacional de Telecomunicaciones AS6057 · UY Administracion Nacion… AS25091 IP-Max SA AS25091 · CH IP-Max SA AS4766 Korea Telecom AS4766 · KR Korea Telecom AS3786 LG DACOM Corporation AS3786 · KR LG DACOM Corporation AS9631 youngsan university AS9631 · KR youngsan university

Network health

Grade E · 37/100
fail Prefixes covered by valid ROAs
0 of 37 announced prefixes are RPKI valid, 37 have no ROA.		 0/25
pass No RPKI invalid announcements
None of the announcements is RPKI invalid.		 10/10
fail Announces IPv6
No IPv6 prefixes are announced.		 0/15
pass More than one upstream
2 upstreams seen in BGP.		 10/10
pass Working abuse contact
hostmaster@nic.or.kr is published.		 15/15
fail Publishes a geofeed
No geofeed found. Without one, location databases have to guess.		 0/10
fail No prefixes smaller than /24 or /48
4 prefixes are smaller than most networks accept (221.164.4.0/28, 221.164.4.16/28, 221.164.4.32/28).		 0/10
n/a Registry record maintained
We have no change date for this record.
Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.
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AS9631 health AS9631 RPKI
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Routing changes

Last 30 days
2026-10-04 06:47 UTCNew prefix 221.164.4.48/28
2026-10-04 06:47 UTCNew prefix 221.164.4.16/28
2026-10-04 06:47 UTCNew prefix 221.164.4.0/28
2026-10-04 06:47 UTCNew prefix 221.164.4.32/28

WHOIS

aut-num:        AS9631
as-name:        YSU-AS-KR-KR
handle:         AS9631
remarks:        youngsan university
administrative,technical:KE5005-KR (AS Manager) <ejkim@ysu.ac.kr>
abuse:          IRT-KRNIC-KR (IRT-KRNIC-KR) <hostmaster@nic.or.kr>
source:         APNIC (RDAP)