222.31.0.0/21

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 222.31.0.0/21

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

Read more

Pingable IPs

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

IP Address	ASN	Details
222.31.1.3	AS4538 China Education and Research Network Center	`10.31ms` from Beijing, CN
222.31.3.138	AS4538 China Education and Research Network Center	`10.30ms` from Beijing, CN
222.31.0.1	AS4538 China Education and Research Network Center	`12.14ms` from Beijing, CN
222.31.5.2	AS4538 China Education and Research Network Center	`11.30ms` from Beijing, CN
222.31.2.90	AS4538 China Education and Research Network Center	`12.37ms` 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
103.186.41.149	AS132559 Gatik Business Solutions	`0.73ms` from Bengaluru, IN
208.228.79.229	AS701 Verizon Business	`6.69ms` from Chicago, US
75.91.189.229	AS7029 Windstream Communications LLC	`13.05ms` from Chicago, US
95.117.157.165	AS6805 Telefonica Germany GmbH & Co.OHG	`9.09ms` from Frankfurt am Main, DE
37.35.50.37	AS9009 M247 Europe SRL	`0.27ms` from Frankfurt am Main, DE
16.112.109.197	AS16509 Amazon.com, Inc.	`1.28ms` from Hyderabad, IN
14.49.44.37	AS4766 Korea Telecom	`6.50ms` from Incheon, KR
103.209.130.37	AS131715 PT. Bank Tabungan Negara (Persero) Tbk	`1.35ms` from Jakarta, ID
88.97.45.69	AS13037 Zen Internet Ltd	`1.88ms` from London, GB
172.217.4.101	AS15169 Google LLC	`0.07ms` from Melbourne, AU
36.35.78.85	AS4837 CHINA UNICOM China169 Backbone	`10.27ms` from Nanjing, CN
219.99.254.197	AS59108 KATCH NETWORK INC.	`3.31ms` from Osaka, JP
98.177.142.197	AS22773 Cox Communications Inc.	`0.99ms` from Phoenix, US
184.69.93.53	AS6327 Shaw Communications	`3.82ms` from Seattle, US
219.142.28.5	AS4847 China Networks Inter-Exchange	`2.50ms` from Tianjin, CN
2.17.97.213	AS16625 Akamai Technologies, Inc.	`0.09ms` from Vienna, AT
86.90.135.213	AS1136 KPN B.V.	`1.26ms` from Amsterdam, NL
178.62.140.69	AS14061 DigitalOcean, LLC	`0.22ms` from Amsterdam, NL
3.29.83.149	AS16509 Amazon.com, Inc.	`0.15ms` from Dubai, AE
97.170.48.229	AS6167 Verizon Business	`11.92ms` from Los Angeles, US
87.221.126.85	AS12479 Orange Espagne SA	`1.41ms` from Madrid, ES
78.4.228.229	AS8968 BT Italia S.p.A.	`5.69ms` from Milan, IT
190.134.2.213	AS6057 Administracion Nacional de Telecomunicaciones	`1.68ms` from Montevideo, UY
84.51.98.21	AS29124 Iskratelecom JSC	`0.80ms` from Moscow, RU
219.59.26.5	AS17676 SoftBank Corp.	`4.52ms` from Osaka, JP

Traceroute

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

traceroute -a -n -q1 -f6 222.31.0.2

traceroute to 222.31.0.2 (222.31.0.2): 64 hops max, 52 byte packets

6 [] 123.255.91.118 3.268 ms

7 [AS4538] 101.4.114.181 37.492 ms

8 *

9 *

10 [AS4538] 101.4.115.249 38.53 ms

11 [AS4538] 101.4.114.166 45.747 ms

12 *

13 [AS4538] 202.112.38.186 48.337 ms

14 [AS56042] 111.53.202.18 53.685 ms

15 [AS4538] 222.31.1.14 46.641 ms

16 [AS4538] 222.31.0.2 47.218 ms

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On February 16th 2026

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