ASN AS38345 is an Autonomous System Number used to identify a network for BGP internet routing.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

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AS38345 Internet Domain Name System Beijing Engineering Resrarch Center Ltd.

Q: Who manages ASN AS38345?

AS38345 is listed under Internet Domain Name System Beijing Engineering Resrarch Center Ltd..

Internet Domain Name System Beijing Engineering Resrarch Center Ltd. knet.cn

CN 37 Routes

AS Data

AS38345

AS38345 – Internet Domain Name System Beijing Engineering Resrarch Center Ltd.

AS Number	38345
AS Name	ZDNS
Organization	Internet Domain Name System Beijing Engineering Resrarch Center Ltd.
Country	CN
Website	knet.cn
Number of IPv4 Routes	24
Number of IPv6 Routes	13
ASN type	BUSINESS
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS38345 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Raw Whois Response

% [whois.apnic.net]
% Whois data copyright terms    http://www.apnic.net/db/dbcopyright.html

% Information related to 'AS37888 - AS38911'

as-block:       AS37888 - AS38911
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
admin-c:        HM20-AP
tech-c:         HM20-AP
mnt-by:         APNIC-HM
mnt-lower:      APNIC-HM
last-modified:  2009-09-29T06:04:16Z
source:         APNIC

role:           APNIC Hostmaster
address:        6 Cordelia Street
address:        South Brisbane
address:        QLD 4101
country:        AU
phone:          +61 7 3858 3100
fax-no:         +61 7 3858 3199
e-mail:         helpdesk@apnic.net
admin-c:        AMS11-AP
tech-c:         AH256-AP
nic-hdl:        HM20-AP
remarks:        Administrator for APNIC
notify:         hostmaster@apnic.net
mnt-by:         MAINT-APNIC-AP
last-modified:  2013-10-23T04:06:51Z
source:         APNIC

% Information related to 'AS38335 - AS38384'

as-block:       AS38335  - AS38384
descr:          CNNIC ASN block
country:        CN
remarks:        These AS numbers are further assigned by CNNIC
remarks:        to CNNIC members and end-users in China
admin-c:        IPAS1-AP
tech-c:         IPAS1-AP
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CNNIC-AP
last-modified:  2008-09-04T06:40:26Z
source:         APNIC

role:           CNNIC IPAS CONFEDERATION
address:        No.4, Zhongguancun No.4 South Street,
address:        Haidian District, Beijing
country:        CN
phone:          +86-010-58813000
fax-no:         +86-010-58813075
e-mail:         ipas@cnnic.cn
admin-c:        IP50-AP
tech-c:         IP50-AP
nic-hdl:        IPAS1-AP
mnt-by:         MAINT-CNNIC-AP
last-modified:  2013-09-12T07:40:01Z
source:         APNIC

% Information related to 'AS38345'

% Abuse contact for 'AS38345' is 'xingzhijie@knet.cn'

aut-num:        AS38345
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 AS4538 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 AS4538 announce AS38345
export:         to AS4641 announce AS38345
export:         to AS4635 announce AS38345
export:         to AS7497 announce AS38345
export:         to AS6939 announce AS38345
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:  2023-11-28T00:58:31Z
source:         APNIC

irt:            IRT-ZDNS-CN
address:        4,South 4th street, Zhongguancun, Haidian District,Beijing
e-mail:         xingzhijie@knet.cn
abuse-mailbox:  xingzhijie@knet.cn
admin-c:        XZ4638-AP
tech-c:         XZ4638-AP
auth:           # Filtered
mnt-by:         MAINT-CNNIC-AP
last-modified:  2025-11-18T00:35:10Z
source:         APNIC

role:           ABUSE CNNICCN
country:        ZZ
address:        Beijing, China
phone:          +000000000
e-mail:         ipas@cnnic.cn
admin-c:        IP50-AP
tech-c:         IP50-AP
nic-hdl:        AC1601-AP
remarks:        Generated from irt object IRT-CNNIC-CN
remarks:        ipas@cnnic.cn is invalid
abuse-mailbox:  ipas@cnnic.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-09-19T17:20:32Z
source:         APNIC

person:         Wenzhe Lu
address:        4,South 4th treet, Zhongguancun,Haidian District,Beijing
country:        CN
phone:          +86-010-58813017
fax-no:         +86-010-58812666-126
e-mail:         lwz@knet.cn
nic-hdl:        WL1818-AP
mnt-by:         MAINT-CNNIC-AP
last-modified:  2011-03-16T03:32:02Z
source:         APNIC

person:         Xing Zhijie
address:        4,South 4th street, Zhongguancun, Haidian District,Beijing
country:        CN
phone:          +86-010-58813342
e-mail:         xingzhijie@knet.cn
nic-hdl:        XZ4638-AP
mnt-by:         MAINT-CNNIC-AP
last-modified:  2016-09-20T06:04:01Z
source:         APNIC

% This query was served by the APNIC Whois Service version 1.88.48 (WHOIS-US2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS37888 - AS38911",
    "description" : [ "APNIC ASN block" ],
    "admin_contacts" : [ "HM20-AP" ],
    "tech_contacts" : [ "HM20-AP" ],
    "remarks" : [ "These AS numbers are further assigned by APNIC", "to APNIC members and end-users in the APNIC region" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2009-09-29",
    "source" : "APNIC"
  }, {
    "as_block" : "AS38335  - AS38384",
    "country" : "CN",
    "description" : [ "CNNIC ASN block" ],
    "admin_contacts" : [ "IPAS1-AP" ],
    "tech_contacts" : [ "IPAS1-AP" ],
    "remarks" : [ "These AS numbers are further assigned by CNNIC", "to CNNIC members and end-users in China" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "MAINT-CNNIC-AP" ],
    "date_updated" : "2008-09-04",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS38345",
    "as_name" : "ZDNS",
    "description" : [ "Internet Domain Name System Beijing Engineering Resrarch Center Ltd.", "4,South 4th treet, Zhongguancun,Haidian District,Beijing" ],
    "country" : "CN",
    "import" : [ "from AS4538 action pref=100; accept ANY", "from AS4641 action pref=100; accept ANY", "from AS4635 action pref=100; accept ANY", "from AS7497 action pref=100; accept ANY", "from AS6939 action pref=100; accept ANY" ],
    "export" : [ "to AS4538 announce AS38345", "to AS4641 announce AS38345", "to AS4635 announce AS38345", "to AS7497 announce AS38345", "to AS6939 announce AS38345" ],
    "admin_contacts" : [ "XZ4638-AP" ],
    "tech_contacts" : [ "WL1818-AP" ],
    "abuse_contacts" : [ "AC1601-AP" ],
    "mnt_irt" : [ "IRT-ZDNS-CN" ],
    "mnt_lower" : [ "MAINT-CNNIC-AP" ],
    "mnt_routes" : [ "MAINT-CNNIC-AP" ],
    "mnt_by" : [ "MAINT-CNNIC-AP" ],
    "date_updated" : "2023-11-28",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-ZDNS-CN",
    "address" : [ "4,South 4th street, Zhongguancun, Haidian District,Beijing" ],
    "street" : "South 4th Street Zhongguancun",
    "city" : "Beijing",
    "email" : [ "xingzhijie@knet.cn" ],
    "abuse_mailbox" : [ "xingzhijie@knet.cn" ],
    "admin_contacts" : [ "XZ4638-AP" ],
    "tech_contacts" : [ "XZ4638-AP" ],
    "mnt_by" : [ "MAINT-CNNIC-AP" ],
    "date_updated" : "2025-11-18",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "XZ4638-AP",
    "name" : "Xing Zhijie",
    "address" : [ "4,South 4th street, Zhongguancun, Haidian District,Beijing" ],
    "street" : "South 4th Street Zhongguancun",
    "city" : "Beijing",
    "country" : "CN",
    "email" : [ "xingzhijie@knet.cn" ],
    "phone" : [ "+86-010-58813342" ],
    "mnt_by" : [ "MAINT-CNNIC-AP" ],
    "date_updated" : "2016-09-20",
    "source" : "APNIC"
  } ],
  "technical_contacts" : [ {
    "handle" : "WL1818-AP",
    "name" : "Wenzhe Lu",
    "address" : [ "4,South 4th treet, Zhongguancun,Haidian District,Beijing" ],
    "street" : "South 4th Treet Zhongguancun",
    "city" : "Beijing",
    "country" : "CN",
    "email" : [ "lwz@knet.cn" ],
    "phone" : [ "+86-010-58813017" ],
    "fax_no" : [ "+86-010-58812666-126" ],
    "mnt_by" : [ "MAINT-CNNIC-AP" ],
    "date_updated" : "2011-03-16",
    "source" : "APNIC"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AC1601-AP",
    "name" : "ABUSE CNNICCN",
    "address" : [ "Beijing, China" ],
    "city" : "Beijing",
    "country" : "ZZ",
    "email" : [ "ipas@cnnic.cn" ],
    "abuse_mailbox" : [ "ipas@cnnic.cn" ],
    "phone" : [ "+000000000" ],
    "admin_contacts" : [ "IP50-AP" ],
    "tech_contacts" : [ "IP50-AP" ],
    "remarks" : [ "Generated from irt object IRT-CNNIC-CN", "ipas@cnnic.cn is invalid" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2025-09-19",
    "source" : "APNIC",
    "addressCountry" : "CHINA"
  } ]
}

Peers

AS Number	Description	Country
AS24482	SG.GS	SG
AS20144	ICANN	US
AS393818	Tucows.com Co.	CA
AS1239	Cogent Communications, LLC	US
AS7497	Computer Network Information Center of Chinese Academy of Sciences (CNIC-CAS)	CN
AS6939	Hurricane Electric LLC	US
AS8359	MTS PJSC	RU
AS4538	Tsinghua University	CN
AS4635	The Hong Kong Internet Exchange Limited	HK
AS4641	The Hong Kong Internet Exchange Limited	HK
AS174	Cogent Communications, LLC	US
AS7497	CNIC CAS	CN
AS36236	NetActuate, Inc	US
AS63363	Tucows.com Co.	CA
AS49544	i3D.net B.V	NL

Upstreams

AS Number	Description	Country
AS8359	MTS PJSC	RU
AS4635	The Hong Kong Internet Exchange Limited	HK
AS4641	The Hong Kong Internet Exchange Limited	HK
AS174	Cogent Communications, LLC	US
AS7497	CNIC CAS	CN

Downstreams

AS Number	Description	Country
AS393818	Tucows.com Co.	CA

Contacts

Email Contacts

ipas@cnnic.cn xingzhijie@knet.cn helpdesk@apnic.net lwz@knet.cn

Abuse Contacts

xingzhijie@knet.cn

Legacy Routes

2620:57:4005::/48

ASN Lookup Tool

ASN Summary