202.203.2.0/24

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	202.203.0.0/16
Registry	APNIC
ID	CDR-CERNET

WHOIS Details

inetnum:        202.202.0.0 - 202.203.255.255
netname:        CDR-CERNET
descr:          China Education and Research Network
descr:          Chengdu Regional Network
country:        CN
admin-c:        CER-AP
tech-c:         CER-AP
abuse-c:        AC1685-AP
status:         ASSIGNED NON-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:  2021-03-24T13:05:10Z
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 2025-01-22
mnt-by:         MAINT-CERNET-AP
last-modified:  2025-01-22T13:47:43Z
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 2025-01-22
abuse-mailbox:  abuse@cernet.edu.cn
mnt-by:         APNIC-ABUSE
last-modified:  2025-01-22T16:25:45Z
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 202.203.2.0/24

Range	ASN	Company	Num of IPs
202.203.0.0/16	AS4538	China Education and Research Network	65,536
202.203.0.0/16	AS138378	China Education and Research Network	65,536
202.200.0.0/13	AS4538	China Education and Research Network	524,288
202.192.0.0/12	AS4538	China Education and Research Network	1,048,576

Nearby Ranges

BGP prefixes that overlap with 202.203.0.0/16

Range	ASN	Company	Num of IPs
202.192.0.0/12	AS4538	China Education and Research Network	1,048,576
202.200.0.0/13	AS4538	China Education and Research Network	524,288
202.203.0.0/16	AS138378	China Education and Research Network	65,536
202.203.0.0/16	AS4538	China Education and Research Network	65,536
202.203.224.0/20	AS4538	China Education and Research Network	4,096
202.203.176.0/20	AS4538	China Education and Research Network	4,096
202.203.208.0/20	AS4538	China Education and Research Network	4,096
202.203.144.0/20	AS4538	China Education and Research Network	4,096
202.203.64.0/20	AS4538	China Education and Research Network	4,096
202.203.48.0/20	AS4538	China Education and Research Network	4,096
202.203.160.0/20	AS4538	China Education and Research Network	4,096
202.203.240.0/20	AS4538	China Education and Research Network	4,096
202.203.32.0/20	AS4538	China Education and Research Network	4,096
202.203.192.0/20	AS4538	China Education and Research Network	4,096
202.203.136.0/21	AS4538	China Education and Research Network	2,048
202.203.80.0/21	AS4538	China Education and Research Network	2,048
202.203.128.0/23	AS4538	China Education and Research Network	512
202.203.176.0/24	AS4538	China Education and Research Network	256
202.203.66.0/24	AS4538	China Education and Research Network	256
202.203.187.0/24	AS4538	China Education and Research Network	256
202.203.112.0/24	AS4538	China Education and Research Network	256
202.203.160.0/24	AS4538	China Education and Research Network	256
202.203.132.0/24	AS4538	China Education and Research Network	256
202.203.144.0/24	AS4538	China Education and Research Network	256
202.203.16.0/24	AS4538	China Education and Research Network	256

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

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

IP Address	ASN	Details
202.203.2.246	AS4538 China Education and Research Network Center	53.08ms from Zhongwei, 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
212.154.154.216	AS50482 JSC Kazakhtelecom	0.52ms from Almaty, KZ
185.226.140.40	AS34412 Saba Abr Mizban LLC	0.52ms from Frankfurt am Main, DE
222.253.232.24	AS45899 VNPT Corp	2.94ms from Ho Chi Minh City, VN
90.221.35.120	AS5607 Sky UK Limited	3.61ms from London, GB
182.20.226.88	AS10010 TOKAI Communications Corporation	3.51ms from Tokyo, JP
76.169.226.120	AS20001 Charter Communications Inc	5.86ms from Los Angeles, US
162.249.252.8	AS36473 Contegix	5.36ms from Los Angeles, US
87.211.101.232	AS13127 Odido Netherlands B.V.	14.29ms from Amsterdam, NL
3.149.21.88	AS16509 Amazon.com, Inc.	0.19ms from Columbus, US
165.165.148.8	AS5713 Telkom SA Ltd.	0.95ms from Johannesburg, ZA
154.179.116.72	AS8452 TE-AS	19.97ms from Cairo, EG
132.249.121.24	AS195 San Diego Supercomputer Center	2.66ms from Los Angeles, US
178.124.43.56	AS6697 Republican Unitary Telecommunication Enterprise Beltelecom	7.88ms from Minsk, BY
18.211.93.184	AS14618 Amazon.com, Inc.	0.21ms from Reston, US
114.244.72.136	AS4808 China Unicom Beijing Province Network	4.00ms from Beijing, CN
5.103.61.72	AS44869 FIBIA P/S	0.67ms from Copenhagen, DK
20.90.75.216	AS8075 Microsoft Corporation	0.19ms from London, GB
85.29.70.152	AS13170 Kaisanet Oy	0.91ms from Oulu, FI
54.211.94.152	AS14618 Amazon.com, Inc.	0.22ms from Reston, US
45.238.76.232	AS268319 CONTINENTAL EMPREENDIMENTOS EIRELI-ME	13.08ms from Fortaleza, BR
50.204.202.120	AS7016 Comcast Cable Communications, LLC	11.09ms from Reston, US
219.74.164.24	AS9506 Singtel Fibre Broadband	1.33ms from Singapore, SG
118.87.151.200	AS4721 JCOM Co., Ltd.	13.33ms from Tokyo, JP
151.249.132.104	AS42772 Unitary enterprise A1	4.43ms from Minsk, BY
38.143.102.8	AS14310 Safra National Bank Of New York	1.77ms from New York City, US

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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