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	Prefix	Description
	223.3.0.0/16	China Education and Research Network

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS4538	China Education and Research Network Center	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS23910	China Next Generation Internet CERNET2	✘	✔
	AS4538	China Education and Research Network Center	✔	✘
	AS133465	Duke Kunshan University	✔	✘

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Downstreams

	ASN	Description	IPv4	IPv6
	AS133465	Duke Kunshan University	✔	✘

aut-num:        AS24361
as-name:        CNGI-NJ-IX-AS-AP
descr:          CERNET2 IX at Southeast University
descr:          CERNET Center
descr:          Beijing 100084, China
country:        CN
import:         from AS23910 action pref=10; accept ANY
import:         from AS4134 action pref=10; accept ANY
import:         from AS4538 action pref=10; accept ANY
export:         to AS23910 announce ANY
export:         to AS4134 announce ANY
export:         to AS4538 announce ANY
default:        to AS23910 action pref=10; networks ANY
remarks:        Multihome member of CERNET
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-by:         APNIC-HM
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:21Z
source:         APNIC

Last Update: 2026-06-03T03:22:27Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
ARIN	as293:as-from-singaren-to-esnet	4548
RIPE	as20965:as-from-tein-to-geant	656
APNIC	as4538:as-customers	117
APNIC	as23911:as-customers-v6	108
APNIC	as4538:as-customers-v6	111