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	Prefix	Description
	150.242.158.0/24	Internet Domain Name System Beijing Engineering Resra...
	150.242.159.0/24	Internet Domain Name System Beijing Engineering Resra...
	2401:8d00:2::/48	Internet Domain Name System Beijing Engineering Resra...
	2401:8d00:14::/48	Internet Domain Name System Beijing Engineering Resra...

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications	✔	✔
	AS4641	The Hong Kong Internet Exchange Limited	✔	✔

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Peers

	ASN	Description	IPv4	IPv6
	AS174	Cogent Communications	✔	✔
	AS4641	The Hong Kong Internet Exchange Limited	✔	✔
	AS1239	Sprint Wireline (Cogent)	✔	✔

aut-num:        AS24149
as-name:        ZDNS
descr:          Internet Domain Name System Beijing Engineering Resrarch Center Ltd.
descr:          4,South 4th treet, Zhongguancun,Haidian District,Beijing
country:        CN
import:         from AS6453 action pref=100; accept ANY
import:         from AS4641 action pref=100; accept ANY
import:         from AS4635 action pref=100; accept ANY
import:         from AS7497 action pref=100; accept ANY
import:         from AS6939 action pref=100; accept ANY
export:         to AS6453 announce AS24149
export:         to AS4641 announce AS24149
export:         to AS4635 announce AS24149
export:         to AS7497 announce AS24149
export:         to AS6939 announce AS24149
admin-c:        XZ4638-AP
tech-c:         WL1818-AP
abuse-c:        AC1601-AP
mnt-lower:      MAINT-CNNIC-AP
mnt-routes:     MAINT-CNNIC-AP
mnt-by:         MAINT-CNNIC-AP
mnt-irt:        IRT-ZDNS-CN
last-modified:  2023-11-28T00:58:30Z
source:         APNIC

Last Update: 2025-04-18T03:22:18Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
APNIC	as4641:as-cuhk-transit	51
RADB	as-29802-customers	2800
RIPE	as20965:as-from-tein-to-geant	653
RIPE	as-netrouting	47
ARIN	as293:as-from-singaren-to-esnet	4548