202.201.240.0/20

AS4538 · China Education and Research Network Center

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Summary

Country	China
Domain	cernet.edu.cn
ASN	AS4538
Parent Range	202.201.192.0/18
Registry	APNIC
ID	XAR-CERNET

WHOIS Details

inetnum:        202.200.0.0 - 202.201.255.255
netname:        XAR-CERNET
descr:          China Education and Research Network
descr:          Xi'an 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:  2021-03-24T13:04:50Z
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 202.201.240.0/20

Range	ASN	Company	Num of IPs
202.201.192.0/18	AS4538	China Education and Research Network	16,384
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

BGP prefixes that are contained by 202.201.240.0/20

Range	ASN	Company	Num of IPs
202.201.253.0/24	AS4538	China Education and Research Network	256
202.201.255.0/24	AS4538	China Education and Research Network	256

Nearby Ranges

BGP prefixes that overlap with 202.201.0.0/16

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
202.201.192.0/18	AS4538	China Education and Research Network	16,384
202.201.160.0/19	AS4538	China Education and Research Network	8,192
202.201.128.0/19	AS4538	China Education and Research Network	8,192
202.201.48.0/20	AS4538	China Education and Research Network	4,096
202.201.64.0/20	AS4538	China Education and Research Network	4,096
202.201.32.0/20	AS4538	China Education and Research Network	4,096
202.201.112.0/20	AS4538	China Education and Research Network	4,096
202.201.16.0/20	AS4538	China Education and Research Network	4,096
202.201.0.0/20	AS4538	China Education and Research Network	4,096
202.201.88.0/21	AS4538	China Education and Research Network	2,048
202.201.152.0/21	AS4538	China Education and Research Network	2,048
202.201.80.0/21	AS4538	China Education and Research Network	2,048
202.201.176.0/21	AS4538	China Education and Research Network	2,048
202.201.216.0/22	AS4538	China Education and Research Network	1,024
202.201.96.0/22	AS4538	China Education and Research Network	1,024
202.201.108.0/22	AS4538	China Education and Research Network	1,024
202.201.106.0/23	AS4538	China Education and Research Network	512
202.201.14.0/24	AS4538	China Education and Research Network	256
202.201.33.0/24	AS4538	China Education and Research Network	256
202.201.255.0/24	AS4538	China Education and Research Network	256
202.201.80.0/24	AS4538	China Education and Research Network	256
202.201.32.0/24	AS4538	China Education and Research Network	256
202.201.166.0/24	AS4538	China Education and Research Network	256
202.201.64.0/24	AS4538	China Education and Research Network	256
202.201.152.0/24	AS4538	China Education and Research Network	256
202.201.128.0/24	AS4538	China Education and Research Network	256
202.201.220.0/24	AS4538	China Education and Research Network	256
202.201.160.0/24	AS4538	China Education and Research Network	256
202.201.18.0/24	AS4538	China Education and Research Network	256
202.201.253.0/24	AS4538	China Education and Research Network	256
202.201.96.0/24	AS4538	China Education and Research Network	256
202.201.53.0/24	AS4538	China Education and Research Network	256
202.201.44.0/24	AS4538	China Education and Research Network	256
202.201.144.0/24	AS4538	China Education and Research Network	256
202.201.43.0/24	AS4538	China Education and Research Network	256
202.201.0.0/24	AS4538	China Education and Research Network	256
202.201.48.0/24	AS4538	China Education and Research Network	256
202.201.68.0/24	AS4538	China Education and Research Network	256
202.201.154.0/24	AS4538	China Education and Research Network	256
202.201.106.0/24	AS4538	China Education and Research Network	256
202.201.201.0/24	AS4538	China Education and Research Network	256
202.201.65.0/24	AS4538	China Education and Research Network	256
202.201.69.0/24	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

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

IP Address	ASN	Details
202.201.242.111	AS4538 China Education and Research Network Center	46.70ms from Tianjin, CN
202.201.251.3	AS4538 China Education and Research Network Center	47.55ms from Beijing, CN
202.201.248.16	AS4538 China Education and Research Network Center	47.80ms from Beijing, CN
202.201.244.130	AS4538 China Education and Research Network Center	46.92ms from Beijing, CN
202.201.241.136	AS4538 China Education and Research Network Center	47.29ms from Beijing, CN
202.201.246.16	AS4538 China Education and Research Network Center	46.94ms 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
75.0.197.196	AS7018 AT&T Enterprises, LLC	12.20ms from Atlanta, US
80.21.188.164	AS3269 Telecom Italia S.p.A.	12.21ms from Milan, IT
3.107.186.212	AS16509 Amazon.com, Inc.	0.10ms from Sydney, AU
203.208.21.116	AS45476 PROPHARMA Limited	1.50ms from Auckland, NZ
79.199.0.100	AS3320 Deutsche Telekom AG	4.26ms from Duesseldorf, DE
187.220.252.4	AS8151 UNINET	4.91ms from Santiago de Queretaro, MX
126.110.14.68	AS17676 SoftBank Corp.	6.88ms from Tokyo, JP
50.87.232.4	AS46606 Unified Layer	1.90ms from Draper, US
153.94.67.244	AS25019 Saudi Telecom Company JSC	2.81ms from Jeddah, SA
86.164.52.36	AS2856 British Telecommunications PLC	1.89ms from London, GB
138.4.54.52	AS766 RedIRIS Autonomous System	0.87ms from Madrid, ES
62.182.222.52	AS47467 Griffel AB	3.93ms from Copenhagen, DK
172.237.111.228	AS63949 Akamai Connected Cloud	0.60ms from London, GB
34.230.207.212	AS14618 Amazon.com, Inc.	0.21ms from Reston, US
119.150.88.196	AS4685 Asahi Net	3.15ms from Tokyo, JP
220.146.218.244	AS4685 Asahi Net	2.41ms from Tokyo, JP
79.235.81.68	AS3320 Deutsche Telekom AG	5.63ms from Duesseldorf, DE
142.115.197.84	AS577 Bell Canada	3.35ms from Montreal, CA
193.45.39.36	AS3301 Telia Company AB	0.77ms from Stockholm, SE
34.241.243.100	AS16509 Amazon.com, Inc.	0.15ms from Dublin, IE
86.166.8.228	AS2856 British Telecommunications PLC	5.55ms from London, GB
104.250.185.4	AS3223 Voxility LLP	0.37ms from London, GB
153.137.75.148	AS4713 NTT Communications Corporation	11.31ms from Osaka, JP
31.36.73.148	AS5410 Bouygues Telecom SA	9.92ms from Paris, FR
181.111.43.228	AS7303 Telecom Argentina S.A.	1.85ms from Buenos Aires, AR

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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