ASN AS24357 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS24357?

AS24357 is listed under CERNET2 IX at South China University of Technology.

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.

AS24357 CERNET2 IX at South China University of Technology

CERNET2 IX at South China University of Technology cernet.edu.cn

CN 203 Routes

AS Data

AS24357

AS24357 – CERNET2 IX at South China University of Technology

AS Number	24357
AS Name	CNGI-GZ-IX-AS-AP
Organization	CERNET2 IX at South China University of Technology
Country	CN
Website	cernet.edu.cn
Number of IPv4 Routes	2
Number of IPv6 Routes	201
ASN type	EDUCATION
Registry	APNIC
Date Allocated	N/A

ASN Intelligence API for production workflows

Use ASN data for AS24357 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

Get ASN API Key ASN API Docs

IP Ranges

Route	Origin	Origin Name	ISP	# IPs
2001:da8:2004::/48	AS24357	CERNET2 IX at South China University of Technology	CNGI CERNET	~1×10²⁴
2001:250:3066::/48	AS24357	CERNET2 IX at South China University of Technology	CERNET IPv6 Backbone	~1×10²⁴
2001:da8:2034::/48	AS24357	CERNET2 IX at South China University of Technology	CNGI CERNET	~1×10²⁴
2001:250:3024::/48	AS24357	CERNET2 IX at South China University of Technology	CERNET IPv6 Backbone	~1×10²⁴
2001:250:3054::/48	AS24357	CERNET2 IX at South China University of Technology	CERNET IPv6 Backbone	~1×10²⁴
2001:250:3006::/48	AS24357	CERNET2 IX at South China University of Technology	CERNET IPv6 Backbone	~1×10²⁴
2001:250:308b::/48	AS24357	CERNET2 IX at South China University of Technology	CERNET IPv6 Backbone	~1×10²⁴
2001:250:3012::/48	AS24357	CERNET2 IX at South China University of Technology	CERNET IPv6 Backbone	~1×10²⁴
240c:cda1::/32	AS24357	CERNET2 IX at South China University of Technology	China Education and Research Network CERNET	~79×10²⁷
2001:da8:2022::/48	AS24357	CERNET2 IX at South China University of Technology	CNGI CERNET	~1×10²⁴

Raw Whois Response

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

% Information related to 'AS23552 - AS24575'

as-block:       AS23552 - AS24575
descr:          APNIC ASN block
remarks:        These AS numbers are further assigned by APNIC
remarks:        to APNIC members and end-users in the APNIC region
remarks:        AS23889 has been transfered to AfriNIC
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 'AS24298 - AS24400'

as-block:       AS24298 - AS24400
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:  2008-09-04T06:40:26Z
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 'AS24357'

% Abuse contact for 'AS24357' is 'abuse@cernet.edu.cn'

aut-num:        AS24357
as-name:        CNGI-GZ-IX-AS-AP
descr:          CERNET2 IX at South China University of Technology
descr:          CERNET Center
descr:          Beijing 100084, China
country:        CN
import:         from AS23910 action pref=10; accept ANY
import:         from AS4134 action pref=10; accept ANY
import:         from AS4837 action pref=10; accept ANY
import:         from AS7497 action pref=10; accept ANY
import:         from AS9800 action pref=10; accept ANY
import:         from AS4538 action pref=10; accept ANY
import:         from AS23912 action pref=10; accept ANY
import:         from AS4840 action pref=10; accept ANY
export:         to AS23910 announce ANY
export:         to AS4134 announce ANY
export:         to AS4837 announce ANY
export:         to AS7497 announce ANY
export:         to AS9800 announce ANY
export:         to AS4538 announce ANY
export:         to AS23912 announce ANY
export:         to AS4840 announce ANY
default:        to AS23910 action pref=10; networks ANY
remarks:        Multihome member 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:  2020-09-03T09:16:10Z
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 1.88.34 (WHOIS-US2)

Parsed Whois Response

{
  "status" : true,
  "whois_server" : "whois.apnic.net",
  "as_blocks" : [ {
    "as_block" : "AS23552 - AS24575",
    "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", "AS23889 has been transfered to AfriNIC" ],
    "mnt_by" : [ "APNIC-HM" ],
    "mnt_lower" : [ "APNIC-HM" ],
    "date_updated" : "2009-09-29",
    "source" : "APNIC"
  }, {
    "as_block" : "AS24298 - AS24400",
    "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" : "2008-09-04",
    "source" : "APNIC"
  } ],
  "aut_nums" : [ {
    "aut_num" : "AS24357",
    "as_name" : "CNGI-GZ-IX-AS-AP",
    "description" : [ "CERNET2 IX at South China University of Technology", "CERNET Center", "Beijing 100084, China" ],
    "country" : "CN",
    "import" : [ "from AS23910 action pref=10; accept ANY", "from AS4134 action pref=10; accept ANY", "from AS4837 action pref=10; accept ANY", "from AS7497 action pref=10; accept ANY", "from AS9800 action pref=10; accept ANY", "from AS4538 action pref=10; accept ANY", "from AS23912 action pref=10; accept ANY", "from AS4840 action pref=10; accept ANY" ],
    "export" : [ "to AS23910 announce ANY", "to AS4134 announce ANY", "to AS4837 announce ANY", "to AS7497 announce ANY", "to AS9800 announce ANY", "to AS4538 announce ANY", "to AS23912 announce ANY", "to AS4840 announce ANY" ],
    "default" : [ "to AS23910 action pref=10; networks ANY" ],
    "admin_contacts" : [ "CER-AP" ],
    "tech_contacts" : [ "CER-AP" ],
    "abuse_contacts" : [ "AC1685-AP" ],
    "remarks" : [ "Multihome member 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
AS9800	CHINA UNICOM	CN
AS137721	HENTE ANKANG HENTE TECHNOLOGY DEVELOPMENT CO.,LTD.	AU
AS4538	China Education and Research Network Center	CN
AS4837	CHINA UNICOM China169 Backbone	CN
AS4840	NAP3 at CERNET located in Guangzhou	CN
AS4538	Tsinghua University	CN
AS23912	IPV6CJ CERNET	CN
AS4134	CHINANET BACKBONE No.31,Jin rong Street	CN
AS23910	CNGI CERNET	CN
AS7497	CNIC CAS	CN

Upstreams

AS Number	Description	Country
AS4538	Tsinghua University	CN
AS23910	CNGI CERNET	CN

Downstreams

AS Number	Description	Country
AS137721	HENTE ANKANG HENTE TECHNOLOGY DEVELOPMENT CO.,LTD.	AU

Contacts

Email Contacts

helpdesk@cernet.edu.cn

Abuse Contacts

abuse@cernet.edu.cn

Legacy Routes

202.112.19.0/24 222.200.0.0/16 222.201.0.0/16 222.17.0.0/16 222.16.0.0/16 202.116.0.0/16 219.222.0.0/16 125.217.0.0/16 211.66.0.0/16 125.218.0.0/16 125.216.0.0/16 219.223.0.0/16 222.203.0.0/16 222.202.0.0/16

ASN Lookup Tool

ASN Summary