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	Prefix	Description
	203.253.227.0/24	KISTI
	203.253.228.0/24	KISTI
	203.253.228.0/23	KISTI
	203.253.229.0/24	KISTI

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS4766	Korea Telecom	✔	✘
	AS1237	Korea Research Environment Open NETwork	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS4766	Korea Telecom	✔	✘
	AS1237	Korea Research Environment Open NETwork	✔	✘

aut-num:        AS45984
as-name:        DIRS-AS-KR
descr:          Dongnam Institute of Radiologycal Sciences
country:        KR
admin-c:        AM1664-AP
tech-c:         AM1664-AP
import:         from AS1237
                action pref=2;
                accept ANY
import:         from AS4766
                action pref=1;
                accept ANY
export:         to AS1237
                announce AS45984
export:         to AS4766
                announce AS45984
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2021-04-02T02:20:02Z
source:         APNIC

Last Update: 2026-06-14T03:22:30Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as1237:as-kreonet-customers	63
RADB	as-kornetbgp	1274
ARIN	as-xo-b	59972
RADB	as-hurricane	25048