101.5.136.0/21

AS4538  ·  China Education and Research Network Center

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Summary

Country China
Domain cernet.edu.cn
ASN AS4538
Parent Range 101.4.0.0/14
Registry APNIC
ID BJR-CERNET

WHOIS Details

inetnum:        101.4.0.0 - 101.7.255.255
netname:        BJR-CERNET
descr:          China Education and Research Network
descr:          Beijing Regional Network
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ALLOCATED PORTABLE
remarks:        origin AS4538
remarks:        confederation
remarks:        --------------------------------------------------------
remarks:        To report network abuse, please contact mnt-irt
remarks:        For troubleshooting, please contact tech-c and admin-c
remarks:        Report invalid contact via www.apnic.net/invalidcontact
remarks:        --------------------------------------------------------
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:24Z
source:         APNIC

irt:            IRT-CERNET-AP
address:        Network Research Center,
address:        Main Bldg, 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:        http://www.ccert.edu.cn
remarks:        abuse@cernet.edu.cn was validated on 2025-08-15
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-09-04T00:59:41Z
source:         APNIC

role:           ABUSE CERNETAP
country:        ZZ
address:        Network Research Center,
address:        Main Bldg, 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 2025-08-15
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-08-15T09:38:28Z
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

route:          101.4.0.0/14
descr:          CERNET
origin:         AS4538
mnt-by:         MAINT-CERNET-AP
last-modified:  2010-12-13T06:08:01Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 101.5.136.0/21

Range ASN Company Num of IPs
101.4.0.0/14 AS4538 China Education and Research Network 262,144

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

Our Hosted Domains API, or Reverse IP API returns a full list of domains that are hosted on a single IP address.
Useful for Cybersecurity

Pingable IPs

24 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
101.5.137.100 AS4538 China Education and Research Network Center 13.87ms from Beijing, CN
101.5.142.116 AS4538 China Education and Research Network Center 8.26ms from Beijing, CN
101.5.136.1 AS4538 China Education and Research Network Center 3.38ms from Beijing, CN
101.5.139.131 AS4538 China Education and Research Network Center 6.24ms from Beijing, CN
101.5.138.118 AS4538 China Education and Research Network Center 8.74ms from Beijing, CN
101.5.143.83 AS4538 China Education and Research Network Center 11.77ms from Beijing, CN
101.5.140.150 AS4538 China Education and Research Network Center 9.90ms from Tianjin, CN

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.

IP Address ASN Details
84.37.118.149 AS396356 Latitude.sh 0.12ms from Ashburn, US
205.139.49.5 AS3561 CenturyLink Communications, LLC 1.87ms from Atlanta, US
27.252.161.213 AS9500 One New Zealand Group Limited 1.87ms from Auckland, NZ
111.160.252.85 AS4837 CHINA UNICOM China169 Backbone 5.74ms from Beijing, CN
35.93.132.133 AS16509 Amazon.com, Inc. 0.17ms from Boardman, US
131.148.182.117 AS33363 Charter Communications, Inc 10.18ms from Chicago, US
66.64.42.21 AS11215 Logix 0.32ms from Dallas, US
184.99.60.165 AS209 CenturyLink Communications, LLC 3.08ms from Denver, US
73.161.169.5 AS7922 Comcast Cable Communications, LLC 10.06ms from Flint, US
84.182.29.213 AS3320 Deutsche Telekom AG 5.72ms from Frankfurt am Main, DE
156.110.26.21 AS5078 Oklahoma Network for Education Enrichment and 4.89ms from Kansas City, US
141.0.93.69 AS29695 Altibox AS 9.98ms from Oslo, NO
38.60.19.101 AS174 Cogent Communications, LLC 3.41ms from Pittsburgh, US
80.53.2.133 AS5617 Orange Polska Spolka Akcyjna 4.32ms from Poznan, PL
200.210.217.21 AS4230 CLARO S.A. 6.84ms from Sao Paulo, BR
101.176.149.37 AS1221 Telstra Limited 3.61ms from Sydney, AU
114.72.195.197 AS4804 Microplex PTY LTD 5.08ms from Sydney, AU
126.116.116.245 AS17676 SoftBank Corp. 5.35ms from Tokyo, JP
93.138.102.165 AS5391 Hrvatski Telekom d.d. 7.63ms from Zagreb, HR
52.217.174.245 AS16509 Amazon.com, Inc. 0.35ms from Ashburn, US
190.211.242.245 AS28103 TECNOLOGIA EN ELECTRONICA E INFORMATICA SOCIEDAD ANONIMA (T.E.I.S.A) 0.22ms from Asuncion, PY
5.54.219.245 AS3329 VODAFONE-PANAFON HELLENIC TELECOMMUNICATIONS COMPANY SA 4.14ms from Athens, GR
79.193.50.21 AS3320 Deutsche Telekom AG 4.24ms from Berlin, DE
107.0.36.5 AS7922 Comcast Cable Communications, LLC 1.33ms from Boston, US
73.143.11.101 AS7922 Comcast Cable Communications, LLC 10.02ms from Boston, US

Traceroute

Below is a recent traceroute taken from the IPinfo ProbeNet to an IP in this range. Learn more.

$
traceroute -a -n -q1 -f5 -m12 101.5.143.220
traceroute to 101.5.143.220 (101.5.143.220): 12 hops max, 52 byte packets
6 *
7 *
8 [] 123.255.91.118 37.682 ms
9 [AS4538] 101.4.115.174 185.289 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Seoul, KR
On

What are IP address ranges?

IP address ranges, or netblocks, are groups of related IP addresses. They are usually represented as a base IP address, followed by a slash, and then a netmask which represents how many IP addresses are contained within the netblock. This format is known as CIDR. You'll also sometimes see netblocks given as a start ip address, and an end ip address, or an ip address range.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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