ASN AS38587 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS38587?

AS38587 is listed under Tsinghua University.

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?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS38587 Tsinghua University | IPGeolocation.io

ASN Lookup Tool

Tsinghua University cernet.edu.cn

CN 2 Routes

AS Data

AS38587

AS38587 – Tsinghua University

AS Number	38587
AS Name	CERNET-IDC-AP
Organization	Tsinghua University
Country	CN
Website	cernet.edu.cn
Number of IPv4 Routes	0
Number of IPv6 Routes	2
ASN type	EDUCATION
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS38587 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2400:a980:4000::/40	AS38587	Tsinghua University	Tsinghua University	~309×10²⁴
2400:a980:40f9::/48	AS38587	Tsinghua University	Tsinghua University	~1×10²⁴

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 'AS38587'

% Abuse contact for 'AS38587' is 'abuse@cernet.edu.cn'

aut-num:        AS38587
as-name:        CERNET-IDC-AP
descr:          CERNET Internet Data Center
descr:          Tsinghua University
descr:          Beijing 100084, China
country:        CN
import:         from AS4538 action pref=10; accept ANY
import:         from AS9308 action pref=10; accept ANY
import:         from AS17772 action pref=10; accept ANY
export:         to AS4538 announce AS38587 AS9308 AS17772
export:         to AS9308 announce AS38587 AS4538
export:         to AS17772 announce AS38587 AS4538
default:        to AS4538 action pref=10; networks ANY
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:  2020-09-03T09:16:05Z
source:         APNIC

irt:            IRT-CERNET-AP
address:        Network Center,
address:        FIT-3-220, Tsinghua Univ
address:        Beijing 100084, China
phone:          +86-10-62784301
fax-no:         +86-10-62785933
e-mail:         abuse@cernet.edu.cn
abuse-mailbox:  abuse@cernet.edu.cn
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        abuse@cernet.edu.cn was validated on 2026-03-05
mnt-by:         MAINT-CERNET-AP
last-modified:  2026-03-05T06:39:56Z
source:         APNIC

role:           ABUSE CERNETAP
country:        ZZ
address:        Network Center,
address:        FIT-3-220, Tsinghua Univ
address:        Beijing 100084, China
phone:          +86-10-62784301
e-mail:         abuse@cernet.edu.cn
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        abuse@cernet.edu.cn was validated on 2026-03-05
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2026-03-05T06:40:20Z
source:         APNIC

role:           CERNET Helpdesk
address:        CERNET Center
address:        Beijing 100084, China
country:        CN
phone:          +86-10-6278-4049
fax-no:         +86-10-6278-5933
e-mail:         helpdesk@cernet.edu.cn
remarks:        abuse@cernet.edu.cn
admin-c:        XL1-CN
tech-c:         SZ2-AP
nic-hdl:        CER-AP
mnt-by:         MAINT-CERNET-AP
last-modified:  2020-09-03T09:14:12Z
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"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS38587",
    "as_name" : "CERNET-IDC-AP",
    "description" : [ "CERNET Internet Data Center", "Tsinghua University", "Beijing 100084, China" ],
    "country" : "CN",
    "import" : [ "from AS4538 action pref=10; accept ANY", "from AS9308 action pref=10; accept ANY", "from AS17772 action pref=10; accept ANY" ],
    "export" : [ "to AS4538 announce AS38587 AS9308 AS17772", "to AS9308 announce AS38587 AS4538", "to AS17772 announce AS38587 AS4538" ],
    "default" : [ "to AS4538 action pref=10; networks ANY" ],
    "admin_contacts" : [ "CER-AP" ],
    "tech_contacts" : [ "CER-AP" ],
    "abuse_contacts" : [ "AC1685-AP" ],
    "remarks" : [ "Multihome portion of CERNET" ],
    "mnt_irt" : [ "IRT-CERNET-AP" ],
    "mnt_lower" : [ "MAINT-CERNET-AP" ],
    "mnt_routes" : [ "MAINT-CERNET-AP" ],
    "mnt_by" : [ "APNIC-HM" ],
    "date_updated" : "2020-09-03",
    "source" : "APNIC"
  } ],
  "irt" : {
    "handle" : "IRT-CERNET-AP",
    "address" : [ "Network Center,", "FIT-3-220, Tsinghua Univ", "Beijing 100084, China" ],
    "city" : "Beijing",
    "zip_code" : "100084",
    "country" : "CHINA",
    "email" : [ "abuse@cernet.edu.cn" ],
    "abuse_mailbox" : [ "abuse@cernet.edu.cn" ],
    "phone" : [ "+86-10-62784301" ],
    "fax_no" : [ "+86-10-62785933" ],
    "admin_contacts" : [ "CER-AP" ],
    "tech_contacts" : [ "CER-AP" ],
    "remarks" : [ "timezone GMT+8", "abuse@cernet.edu.cn was validated on 2026-03-05" ],
    "mnt_by" : [ "MAINT-CERNET-AP" ],
    "date_updated" : "2026-03-05",
    "source" : "APNIC"
  },
  "administrative_contacts" : [ {
    "handle" : "CER-AP",
    "name" : "CERNET Helpdesk",
    "address" : [ "CERNET Center", "Beijing 100084, China" ],
    "city" : "Beijing",
    "zip_code" : "100084",
    "country" : "CN",
    "email" : [ "helpdesk@cernet.edu.cn" ],
    "phone" : [ "+86-10-6278-4049" ],
    "fax_no" : [ "+86-10-6278-5933" ],
    "admin_contacts" : [ "XL1-CN" ],
    "tech_contacts" : [ "SZ2-AP" ],
    "remarks" : [ "abuse@cernet.edu.cn" ],
    "mnt_by" : [ "MAINT-CERNET-AP" ],
    "date_updated" : "2020-09-03",
    "source" : "APNIC",
    "addressCountry" : "CHINA"
  } ],
  "technical_contacts" : [ {
    "handle" : "CER-AP",
    "name" : "CERNET Helpdesk",
    "address" : [ "CERNET Center", "Beijing 100084, China" ],
    "city" : "Beijing",
    "zip_code" : "100084",
    "country" : "CN",
    "email" : [ "helpdesk@cernet.edu.cn" ],
    "phone" : [ "+86-10-6278-4049" ],
    "fax_no" : [ "+86-10-6278-5933" ],
    "admin_contacts" : [ "XL1-CN" ],
    "tech_contacts" : [ "SZ2-AP" ],
    "remarks" : [ "abuse@cernet.edu.cn" ],
    "mnt_by" : [ "MAINT-CERNET-AP" ],
    "date_updated" : "2020-09-03",
    "source" : "APNIC",
    "addressCountry" : "CHINA"
  } ],
  "abuse_contacts" : [ {
    "handle" : "AC1685-AP",
    "name" : "ABUSE CERNETAP",
    "address" : [ "Network Center,", "FIT-3-220, Tsinghua Univ", "Beijing 100084, China" ],
    "city" : "Beijing",
    "zip_code" : "100084",
    "country" : "ZZ",
    "email" : [ "abuse@cernet.edu.cn" ],
    "abuse_mailbox" : [ "abuse@cernet.edu.cn" ],
    "phone" : [ "+86-10-62784301" ],
    "admin_contacts" : [ "CER-AP" ],
    "tech_contacts" : [ "CER-AP" ],
    "remarks" : [ "Generated from irt object IRT-CERNET-AP", "abuse@cernet.edu.cn was validated on 2026-03-05" ],
    "mnt_by" : [ "APNIC-ABUSE" ],
    "date_updated" : "2026-03-05",
    "source" : "APNIC",
    "addressCountry" : "CHINA"
  } ]
}

Peers

AS Number	Description	Country
AS9308	Abitcool China Inc.	CN
AS4538	Tsinghua University	CN
AS23910	CNGI CERNET	CN
AS17772	CHINA COMMUNICATIONS SYSTEM Co.,Ltd.	CN

Upstreams

AS Number	Description	Country
AS23910	CNGI CERNET	CN

Contacts

Email Contacts

helpdesk@cernet.edu.cn

Abuse Contacts

abuse@cernet.edu.cn