222.31.128.0/19

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	222.28.0.0/14
Registry	APNIC
ID	BJR-CERNET

WHOIS Details

inetnum:        222.28.0.0 - 222.31.255.255
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
mnt-by:         APNIC-HM
mnt-lower:      MAINT-CERNET-AP
mnt-routes:     MAINT-CERNET-AP
mnt-irt:        IRT-CERNET-AP
last-modified:  2020-09-03T09:16:23Z
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:  2025-11-18T00:26:28Z
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

Overlapping Ranges

BGP prefixes that contain 222.31.128.0/19

Range	ASN	Company	Num of IPs
222.28.0.0/14	AS4538	China Education and Research Network	262,144

Nearby Ranges

BGP prefixes that overlap with 222.31.0.0/16

Range	ASN	Company	Num of IPs
222.28.0.0/14	AS4538	China Education and Research Network	262,144

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
222.31.149.7	AS4538 China Education and Research Network Center	`3.83ms` from Beijing, CN
222.31.135.43	AS4538 China Education and Research Network Center	`4.79ms` from Beijing, 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
147.135.71.67	AS16276 OVH SAS	`1.23ms` from Ashburn, US
211.145.43.51	AS4808 China Unicom Beijing Province Network	`3.18ms` from Beijing, CN
138.117.11.19	AS263754 SN COMUNICACIONES	`1.45ms` from Buenos Aires, AR
216.27.71.51	AS17378 TierPoint, LLC	`0.93ms` from Charlotte, US
74.77.101.243	AS11351 Charter Communications Inc	`18.92ms` from Chicago, US
87.200.122.131	AS15802 Emirates Integrated Telecommunications Company PJSC	`3.85ms` from Dubai, AE
52.48.216.99	AS16509 Amazon.com, Inc.	`0.19ms` from Dublin, IE
52.169.177.227	AS8075 Microsoft Corporation	`0.15ms` from Dublin, IE
75.87.91.227	AS11427 Charter Communications Inc	`13.57ms` from Houston, US
1.254.11.179	AS9318 SK Broadband Co Ltd	`5.99ms` from Incheon, KR
76.219.217.3	AS7018 AT&T Enterprises, LLC	`17.94ms` from Los Angeles, US
100.27.176.227	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
61.97.114.3	AS3786 LG DACOM Corporation	`1.74ms` from Seoul, KR
218.81.175.51	AS4812 China Telecom (Group)	`4.38ms` from Shanghai, CN
79.133.0.3	AS3238 Alands Telekommunikation Ab	`2.92ms` from Stockholm, SE
35.89.121.115	AS16509 Amazon.com, Inc.	`0.49ms` from Boardman, US
111.223.3.83	AS133989 SBR Telecom Pvt. Ltd	`0.66ms` from Delhi, IN
91.73.178.3	AS15802 Emirates Integrated Telecommunications Company PJSC	`2.74ms` from Dubai, AE
125.222.60.3	AS4538 China Education and Research Network Center	`10.40ms` from Liaoyang, CN
161.230.44.35	AS12353 Vodafone Portugal	`7.08ms` from Lisbon, PT
79.153.114.99	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.41ms` from Madrid, ES
87.91.253.19	AS5410 Bouygues Telecom SA	`8.15ms` from Marseille, FR
203.114.196.227	AS7679 QTnet,Inc.	`10.63ms` from Osaka, JP
71.244.129.211	AS701 Verizon Business	`4.12ms` from Philadelphia, US
144.123.220.3	AS4134 CHINANET-BACKBONE	`6.75ms` from Qingdao, CN

Traceroute

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

traceroute -a -n -q1 -m13 222.31.129.12

traceroute to 222.31.129.12 (222.31.129.12): 13 hops max, 52 byte packets

1 [AS15169] 72.14.239.92 248.538 ms

2 [] 123.255.91.235 223.234 ms

3 *

4 [AS174] 38.150.75.1 208.165 ms

5 [AS4538] 101.4.114.181 246.613 ms

6 *

7 *

8 [AS4538] 101.4.112.98 241.783 ms

9 [AS4538] 101.4.113.229 244.532 ms

10 [AS4538] 219.242.56.2 241.301 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Berlin, DE

On January 19th 2026

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.

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