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AS18305 POSCO DX

South Korea POSNET APNIC 68 IPv4 prefixes 0 IPv6 prefixes
IPv4 addresses
75,520
IPv6 /48 networks
0
RPKI
0 valid68 no ROA
Peers and downstreams
0

Holder

AS name
POSNET
Description
POSCO DX
Organisation
POSCO DX
Abuse contact
Not published
Assigned
2002-07-04
1.209.181.0/241.209.182.0/241.209.183.0/241.209.185.0/241.209.29.0/24116.123.216.0/24116.124.169.0/24116.127.24.0/24118.129.142.0/24118.129.143.0/24119.202.117.0/24175.202.208.0/24175.202.211.0/24175.202.212.0/24175.202.213.0/24203.231.144.0/24203.231.145.0/24203.231.145.32/28203.231.145.64/27203.231.146.0/24203.231.146.224/27203.231.147.0/24203.231.148.0/24203.231.149.0/24203.231.151.0/24203.238.192.0/21203.238.200.0/22203.238.204.0/24203.238.205.0/24203.238.206.0/24203.238.207.0/24203.238.210.0/24203.238.219.0/24203.238.219.240/28203.238.220.0/22203.238.221.0/24203.241.0.0/19203.244.32.0/19203.244.64.0/19203.245.128.0/17203.246.184.0/24203.246.185.0/24203.246.186.0/24203.246.187.0/24203.246.188.0/24203.246.189.0/24210.105.154.0/24210.108.199.0/24210.108.50.0/24210.109.175.0/24210.113.156.0/24210.113.157.0/24211.169.135.0/24211.171.173.0/25211.171.182.0/24211.171.185.0/24211.171.186.0/24211.171.187.0/24211.171.31.0/24211.229.145.0/24211.32.161.0/24211.32.162.0/24211.32.165.0/24211.60.10.0/24220.122.214.0/25222.104.91.0/24222.104.92.0/2439.121.111.0/24

Upstream graph

Upstreams and their upstreams, from BGP paths
AS24482 SG.GS AS24482 · SG SG.GS AS35280 F5 Networks SARL AS35280 · FR F5 Networks SARL AS6057 Administracion Nacional de Telecomunicaciones AS6057 · UY Administracion Nacion… AS14840 BR.Digital Telecom AS14840 · BR BR.Digital Telecom AS6939 Hurricane Electric LLC AS6939 · US Hurricane Electric LLC AS2914 NTT America, Inc. AS2914 · US NTT America, Inc. AS701 Uunet AS701 · US Uunet AS174 AS174 AS174 AS174 AS3356 Level 3 Parent, LLC AS3356 · US Level 3 Parent, LLC AS13335 Cloudflare, Inc. AS13335 · US Cloudflare, Inc. AS9318 SK Broadband Co Ltd AS9318 · KR SK Broadband Co Ltd AS4766 Korea Telecom AS4766 · KR Korea Telecom AS3786 LG DACOM Corporation AS3786 · KR LG DACOM Corporation AS9848 SEJONG NETWORKS AS9848 · KR SEJONG NETWORKS AS18305 POSCO DX AS18305 · KR POSCO DX

Network health

Grade E · 37/100
fail Prefixes covered by valid ROAs
0 of 68 announced prefixes are RPKI valid, 68 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
5 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
6 prefixes are smaller than most networks accept (203.231.145.32/28, 203.231.145.64/27, 203.231.146.224/27).		 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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Routing changes

Last 30 days
2026-10-04 21:37 UTCNew prefix 203.231.145.32/28
2026-10-04 21:37 UTCNew prefix 203.231.145.64/27
2026-10-04 21:37 UTCNew prefix 203.231.146.224/27
2026-10-04 21:37 UTCNew prefix 203.238.219.240/28

WHOIS

aut-num:        AS18305
as-name:        POSNET-KR
handle:         AS18305
remarks:        POSCO DX
administrative,technical:A467-KR (AS Manager) <hthoon@poscoict.com>
abuse:          IRT-KRNIC-KR (IRT-KRNIC-KR) <hostmaster@nic.or.kr>
source:         APNIC (RDAP)