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	Prefix	Description
	2001:252::/32	CNGI International Gateway Network (CNGIIGN)
	2001:7fa:5::/48	China Next Generation Internet Beijing IX

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS6939	Hurricane Electric LLC	✘	✔
	AS4635	HKIX Route Servers	✘	✔
	AS4538	China Education and Research Network Center	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS38255	China Education and Research Network (CERNET)	✔	✔
	AS6939	Hurricane Electric LLC	✘	✔
	AS3491	PCCW Global, Inc.	✘	✔
	AS23910	China Next Generation Internet CERNET2	✘	✔
	AS4635	HKIX Route Servers	✘	✔
	AS11537	Internet2	✘	✔
	AS4538	China Education and Research Network Center	✔	✔
	AS9886	CTCSCI TECH LIMITED	✘	✔
	AS49544	i3D.net B.V	✘	✔
	AS7660	Asia Pacific Advanced Network - Japan	✔	✔
	AS24489	Trans-Eurasia Information Network (TEIN2) - North	✔	✔
	AS45110	Beijing Tian Wei Xin Tong technology corp. limited.	✘	✔
	AS24482	SG.GS	✘	✔
	AS38008	Aperture Science Limited	✘	✔
	AS36236	NetActuate, Inc	✘	✔
	AS59265	China telecom – China Next Generation Internet	✘	✔
	AS1273	Vodafone Group PLC	✘	✔
	AS2497	Internet Initiative Japan Inc.	✘	✔
	AS4842	Tianhai InfoTech	✘	✔
	AS293	ESnet	✔	✔
	AS9401	National Library of China	✔	✘
	AS8359	MTS PJSC	✘	✔
	AS15169	Google LLC	✘	✔
	AS7497	Computer Network Information Center of Chinese Academ...	✔	✘

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Downstreams

	ASN	Description	IPv4	IPv6
	AS38255	China Education and Research Network (CERNET)	✘	✔
	AS23910	China Next Generation Internet CERNET2	✘	✔
	AS24489	Trans-Eurasia Information Network (TEIN2) - North	✔	✘
	AS59265	China telecom – China Next Generation Internet	✘	✔
	AS45110	Beijing Tian Wei Xin Tong technology corp. limited.	✘	✔

aut-num:        AS23911
as-name:        CNGI-BJIX-AS-AP
descr:          China Next Generation Internet Beijing IX
descr:          CNGI-CERNET
descr:          Beijing 100084, China
country:        CN
import:         from AS4538 action pref=10; accept ANY
import:         from AS4839 action pref=10; accept ANY
import:         from AS4840 action pref=10; accept ANY
import:         from AS9406 action pref=10; accept ANY
import:         from AS9407 action pref=10; accept ANY
import:         from AS6939 action pref=10; accept ANY
export:         to AS9406 announce AS23911 AS4538 AS9407 AS4839 AS4840
export:         to AS4538 announce AS23911 AS9406 AS9407 AS4839 AS4840
export:         to AS9407 announce AS23911 AS4538 AS9406 AS4839 AS4840
export:         to AS4840 announce AS23911 AS4538 AS9406 AS9407 AS4839
export:         to AS4839 announce AS23911 AS4538 AS9406 AS9407 AS4840
default:        to AS4538 action pref=10; networks ANY
mp-export:      afi ipv6 to AS6939 announce AS23911:AS-CUSTOMERS-V6
remarks:        Multihome portion 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:  2020-09-03T09:16:07Z
source:         APNIC

Last Update: 2025-12-26T03:22:23Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as-pacnet-downstream-ph	428
RADB	as-hkix	71345
APNIC	as4538:as-customers	116
ARIN	as293:as-from-singaren-to-esnet	4548
APNIC	as23855:as-nren-transit	16
RADB	as-anc-customer-proxy-register	2403
RIPE	as20965:as-from-tein-to-geant	654
APNIC	as4538:as-customers-v6	110
LEVEL3	as-level3-origins-na	0
APNIC	as-cbccom131314	11
NTTCOM	as-cbccom	9
APNIC	as7497:as-cstnet	18
RADB	as-pacnet-downstream-hk	375
ARIN	as-xo-b	58183
APNIC	as-cbccom45110	10
RADB	as-hurricanev6	20157
APNIC	as23911:as-customers-v6	108
RADB	as-pacnet-customer-proxy-register	1171
RIPE	as20965:as-from-cstnet-to-geant	3