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	Prefix	Description
	202.179.240.0/20	Trans-Eurasia Information Network (TEIN2)

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS23911	China Next Generation Internet Beijing IX	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS24490	Trans-Eurasia Information Network (TEIN2) - SG	✔	✔
	AS24475	ThaiREN.Thailand Research and Education Network Thailand	✔	✔
	AS24287	National Institute of Informatics	✔	✔
	AS23911	China Next Generation Internet Beijing IX	✔	✔
	AS137207	Joint Universities Computer Centre Limited	✔	✔
	AS17579	KISTI	✔	✘
	AS9821	Department of Science and Technology	✔	✘
	AS10076	ERDEMNET Mongolian National Research and Education Network	✔	✔
	AS7660	Asia Pacific Advanced Network - Japan	✔	✘
	AS9270	National Infomation Society Agency	✔	✘

aut-num:        AS24489
as-name:        TEIN2-NORTH-AP
descr:          Trans-Eurasia Information Network (TEIN2) - North
descr:          China Education and Research Network Center
descr:          Tsinghua University, Beijing 100084, China
country:        CN
import:         from AS4538 action pref=10; accept ANY
import:         from AS7660 action pref=10; accept ANY
import:         from AS20965 action pref=10; accept ANY
export:         to AS4538 announce AS24489
export:         to AS7660 announce AS24489
export:         to AS20965 announce AS24489
default:        to AS20965 action pref=10; networks ANY
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:  2020-09-03T09:16:23Z
source:         APNIC

Last Update: 2026-02-18T03:22:27Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
ARIN	as293:as-from-singaren-to-esnet	4548
RADB	as-pacnet-customer-proxy-register	1171
LEVEL3	as-level3-origins-na	0
APNIC	as23911:as-customers-v6	108
ARIN	as-xo-b	58221
APNIC	as4538:as-customers	116
RIPE	as20965:as-from-tein-to-geant	656
RADB	as-anc-customer-proxy-register	2403
APNIC	as4538:as-customers-v6	110
ARIN	as293:as-from-transpac-to-esnet	532