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

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

Read more

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
222.30.7.254	AS4538 China Education and Research Network Center	`6.52ms` from Beijing, CN
222.30.0.81	AS4538 China Education and Research Network Center	`5.79ms` from Beijing, CN
222.30.3.31	AS4538 China Education and Research Network Center	`4.62ms` from Beijing, CN
222.30.4.211	AS4538 China Education and Research Network Center	`4.64ms` from Beijing, CN
222.30.5.210	AS4538 China Education and Research Network Center	`4.58ms` from Beijing, CN
222.30.6.79	AS4538 China Education and Research Network Center	`4.60ms` from Beijing, CN
222.30.2.232	AS4538 China Education and Research Network Center	`4.64ms` 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
34.27.247.5	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
202.186.2.213	AS9930 TTNET-MY	`1.64ms` from Kuala Lumpur, MY
187.150.227.149	AS8151 UNINET	`12.27ms` from Miami, US
23.111.107.197	AS39134 EDINAYA SET LIMITED LIABILITY COMPANY	`0.65ms` from Moscow, RU
98.193.243.229	AS7922 Comcast Cable Communications, LLC	`10.16ms` from Murfreesboro, US
4.26.20.133	AS3356 Level 3 Parent, LLC	`0.69ms` from New York City, US
91.10.62.165	AS3320 Deutsche Telekom AG	`7.62ms` from Nuernberg, DE
86.238.155.229	AS3215 Orange S.A.	`1.86ms` from Paris, FR
27.210.41.165	AS4837 CHINA UNICOM China169 Backbone	`1.79ms` from Qingdao, CN
122.49.64.53	AS9286 KINX	`0.48ms` from Seoul, KR
116.227.134.21	AS4812 China Telecom (Group)	`5.18ms` from Shanghai, CN
125.14.33.101	AS9824 JCOM Co., Ltd.	`7.10ms` from Tokyo, JP
73.122.218.85	AS7922 Comcast Cable Communications, LLC	`5.18ms` from Atlanta, US
190.211.152.5	AS52292 Fiber2home S.A	`1.66ms` from Buenos Aires, AR
84.186.164.229	AS3320 Deutsche Telekom AG	`2.77ms` from Hamburg, DE
27.72.57.37	AS7552 Viettel Group	`0.98ms` from Hanoi, VN
40.120.137.21	AS8075 Microsoft Corporation	`0.19ms` from London, GB
88.11.203.181	AS3352 TELEFONICA DE ESPANA S.A.U.	`11.04ms` from Madrid, ES
79.55.52.197	AS3269 Telecom Italia S.p.A.	`4.11ms` from Milan, IT
76.129.177.181	AS7922 Comcast Cable Communications, LLC	`14.70ms` from Murfreesboro, US
79.188.223.133	AS5617 Orange Polska Spolka Akcyjna	`6.17ms` from Poznan, PL
96.217.132.213	AS7922 Comcast Cable Communications, LLC	`1.78ms` from Seattle, US
50.233.28.197	AS7922 Comcast Cable Communications, LLC	`2.30ms` from Secaucus, US
177.94.118.229	AS27699 TELEFÔNICA BRASIL S.A	`1.63ms` from São Paulo, BR
88.223.72.85	AS24877 UAB INIT	`2.44ms` from Vilnius, LT

Traceroute

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

traceroute -a -n -q1 -f7 -m11 222.30.1.194

traceroute to 222.30.1.194 (222.30.1.194): 11 hops max, 52 byte packets

7 [AS174] 38.150.75.1 96.497 ms

8 [AS4538] 101.4.114.181 121.104 ms

9 *

10 *

11 *

Measurement taken from

IPinfo ProbeNet in Jakarta, ID

On December 14th 2025

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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