222.30.0.0/21

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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
auth:           # Filtered
remarks:        timezone GMT+8
remarks:        http://www.ccert.edu.cn
remarks:        [email protected] 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:         [email protected]
admin-c:        CER-AP
tech-c:         CER-AP
nic-hdl:        AC1685-AP
remarks:        Generated from irt object IRT-CERNET-AP
remarks:        [email protected] was validated on 2025-08-15
abuse-mailbox:  [email protected]
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:         [email protected]
remarks:        [email protected]
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 222.30.0.0/21

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 222.30.0.0/16

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

1,281 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
222.30.4.115	AS4538 China Education and Research Network Center	`4.67ms` from Beijing, CN
222.30.5.91	AS4538 China Education and Research Network Center	`4.68ms` from Beijing, CN
222.30.0.81	AS4538 China Education and Research Network Center	`5.72ms` from Beijing, CN
222.30.7.254	AS4538 China Education and Research Network Center	`6.09ms` from Beijing, CN
222.30.6.233	AS4538 China Education and Research Network Center	`4.68ms` from Beijing, CN
222.30.2.204	AS4538 China Education and Research Network Center	`4.67ms` from Beijing, CN
222.30.3.40	AS4538 China Education and Research Network Center	`4.67ms` 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
186.24.50.213	AS6306 TELEFONICA VENEZOLANA, C.A.	`1.17ms` from Caracas, VE
1.52.11.149	AS18403 FPT Telecom Company	`9.56ms` from Hanoi, VN
61.5.157.5	AS9541 Cyber Internet Services (Pvt) Ltd.	`0.94ms` from Karachi, PK
94.78.226.85	AS12389 PJSC Rostelecom	`0.88ms` from Krasnoyarsk, RU
180.95.168.245	AS4837 CHINA UNICOM China169 Backbone	`9.02ms` from Lanzhou, CN
75.85.219.229	AS20001 Charter Communications Inc	`9.56ms` from Los Angeles, US
70.93.31.149	AS20001 Charter Communications Inc	`12.96ms` from Los Angeles, US
176.101.73.213	AS42947 Telfy Telecom S.L.	`7.47ms` from Madrid, ES
86.237.21.69	AS3215 Orange S.A.	`8.29ms` from Marseille, FR
16.50.217.245	AS16509 Amazon.com, Inc.	`0.68ms` from Melbourne, AU
220.253.155.245	AS18371 Neighbourhood Cable	`5.38ms` from Melbourne, AU
47.200.45.181	AS5650 Frontier Communications of America, Inc.	`6.58ms` from Miami, US
103.69.89.37	AS136373 Allied It Infrastructure And Services Pvt Ltd	`0.23ms` from Mumbai, IN
210.130.128.245	AS2497 Internet Initiative Japan Inc.	`7.85ms` from Osaka, JP
54.207.126.181	AS16509 Amazon.com, Inc.	`0.17ms` from Osasco, BR
177.93.179.149	AS262777 Neolink Telecomunicações LTDA	`4.78ms` from Osasco, BR
95.215.243.85	AS59537 Eroshenko Aleksey Borisovich	`15.50ms` from Samara, RU
173.225.94.21	AS393777 State of WA Secretary of State	`6.65ms` from Seattle, US
125.7.28.133	AS17477 Macquarie Technology Operations Pty Limited	`0.56ms` from Sydney, AU
178.190.6.229	AS8447 A1 Telekom Austria AG	`1.11ms` from Vienna, AT
176.111.131.5	AS198577 BEST PARTNER Andrzej Czachor	`8.14ms` from Warsaw, PL
73.122.218.85	AS7922 Comcast Cable Communications, LLC	`5.12ms` from Atlanta, US
149.135.138.181	AS1221 Telstra Limited	`0.88ms` from Brisbane, AU
41.36.89.117	AS8452 TE-AS	`3.53ms` from Cairo, EG
222.236.37.133	AS9318 SK Broadband Co Ltd	`1.50ms` from Incheon, KR

Traceroute

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

traceroute -a -n -q1 222.30.2.168

traceroute to 222.30.2.168 (222.30.2.168): 64 hops max, 52 byte packets

1 [AS50613] 37.235.49.2 500.781 ms

2 [AS4538] 222.30.2.168 275.152 ms

Measurement taken from

IPinfo ProbeNet in Hafnarfjoerdur, IS

On January 30th 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.

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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