203.237.99.0/24

AS9754 · CHOSUN UNIVERSITY

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Summary

Country	South Korea
Domain	kren.kr
ASN	AS9754
Parent Range	203.237.96.0/19
Registry	APNIC
ID	KREN

WHOIS Details

inetnum:        203.237.96.0 - 203.237.127.255
netname:        KREN
descr:          Korean Education Network
admin-c:        IM70-AP
tech-c:         IM70-AP
country:        KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2017-02-02T04:55:26Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        9, Jinheung-gil, Naju-si, Jeollanam-do
e-mail:         irt@nic.or.kr
abuse-mailbox:  irt@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        irt@nic.or.kr was validated on 2020-04-09
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-09-04T01:00:01Z
source:         APNIC

person:         IP Manager
address:        57 Daehak-ro, Jongno-gu, Seoul
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM70-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-11-17T00:10:02Z
source:         APNIC

inetnum:        203.237.96.0 - 203.237.127.255
netname:        KREN-KR
descr:          Korean Education Network
country:        KR
admin-c:        IA142-KR
tech-c:         IM142-KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
changed:        hostmaster@nic.or.kr 20240912
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

person:         IP Manager
address:        57 Daehak-ro, Jongno-gu, Seoul
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IA142-KR
mnt-by:         MNT-KRNIC-AP
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

person:         IP Manager
address:        57 Daehak-ro, Jongno-gu, Seoul
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM142-KR
mnt-by:         MNT-KRNIC-AP
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

Overlapping Ranges

BGP prefixes that contain 203.237.99.0/24

Range	ASN	Company	Num of IPs
203.237.96.0/19	AS9754	Korean Education Network	8,192

Nearby Ranges

BGP prefixes that overlap with 203.237.0.0/16

Range	ASN	Company	Num of IPs
203.237.128.0/17	AS23983	Korean Education Network	32,768
203.237.128.0/17	AS4766	Korean Education Network	32,768
203.237.128.0/17	AS3786	Korean Education Network	32,768
203.237.64.0/19	AS9778	KISTI	8,192
203.237.32.0/19	AS18297	Gwangju Institute of Science and Technology	8,192
203.237.0.0/19	AS10166	Korea Water Resources Corporation	8,192
203.237.96.0/19	AS9754	Korean Education Network	8,192
203.237.202.0/23	AS18026	CHEJU NATIONAL UNIVERSITY	512
203.237.175.0/24	AS18031	SANGMYUNG UNIVERSITY	256
203.237.160.0/24	AS3786	Dongyang Technical College	256
203.237.161.0/24	AS3786	Dongyang Technical College	256
203.237.162.0/24	AS3786	Dongyang Technical College	256
203.237.163.0/24	AS3786	Dongyang Technical College	256
203.237.164.0/24	AS3786	Dongyang Technical College	256
203.237.165.0/24	AS3786	Dongyang Technical College	256
203.237.166.0/24	AS3786	Dongyang Technical College	256
203.237.167.0/24	AS3786	Dongyang Technical College	256
203.237.172.0/24	AS3786	SANGMYUNG UNIVERSITY	256
203.237.254.0/24	AS38694	CHEONGJU NATIONAL UNIVERSITY OF EDUCATION	256
203.237.255.0/24	AS38694	CHEONGJU NATIONAL UNIVERSITY OF EDUCATION	256
203.237.154.0/24	AS4766	DAEJEON UNIVERSITY	256
203.237.156.0/24	AS4766	DAEJEON UNIVERSITY	256
203.237.157.0/24	AS4766	DAEJEON UNIVERSITY	256
203.237.158.0/24	AS4766	DAEJEON UNIVERSITY	256
203.237.159.0/24	AS4766	DAEJEON UNIVERSITY	256
203.237.191.0/24	AS4766	daekuUniversity of Education	256
203.237.204.0/24	AS4766	useokUniversity	256
203.237.205.0/24	AS4766	useokUniversity	256
203.237.206.0/24	AS4766	useokUniversity	256
203.237.207.0/24	AS4766	useokUniversity	256
203.237.208.0/24	AS4766	useokUniversity	256
203.237.209.0/24	AS4766	useokUniversity	256
203.237.210.0/24	AS4766	useokUniversity	256
203.237.211.0/24	AS4766	useokUniversity	256
203.237.212.0/24	AS4766	useokUniversity	256
203.237.213.0/24	AS4766	useokUniversity	256
203.237.214.0/24	AS4766	useokUniversity	256
203.237.215.0/24	AS4766	useokUniversity	256
203.237.224.0/24	AS4766	DANKOOK UNIVERSITY	256
203.237.225.0/24	AS4766	HALLYM COLLEGE	256
203.237.231.0/24	AS4766	HALLYM COLLEGE	256
203.237.250.0/24	AS4766	Chungang University	256
203.237.190.0/24	AS9318	Shinhan University	256
203.237.216.0/24	AS9318	DANKOOK UNIVERSITY	256
203.237.217.0/24	AS9318	DANKOOK UNIVERSITY	256
203.237.218.0/24	AS9318	DANKOOK UNIVERSITY	256
203.237.220.0/24	AS9318	DANKOOK UNIVERSITY	256
203.237.221.0/24	AS9318	DANKOOK UNIVERSITY	256
203.237.222.0/24	AS9318	DANKOOK UNIVERSITY	256
203.237.223.0/24	AS9318	DANKOOK UNIVERSITY	256

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.237.99.12	chosun.kr	1

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

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
20.158.51.184	AS8070 Microsoft Corporation	`0.64ms` from Boydton, US
64.127.184.248	AS19201 Eastex Telephone Cooperative, Inc.	`9.45ms` from Dallas, US
209.197.248.24	AS29863 Latisys-Denver, LLC	`1.54ms` from Denver, US
93.233.44.8	AS3320 Deutsche Telekom AG	`3.51ms` from Duesseldorf, DE
146.90.236.56	AS6871 Plusnet	`2.74ms` from London, GB
84.69.94.56	AS5378 Vodafone Limited	`7.92ms` from Manchester, GB
90.118.154.136	AS3215 Orange S.A.	`4.26ms` from Marseille, FR
79.12.22.120	AS3269 Telecom Italia S.p.A.	`2.16ms` from Naples, IT
124.247.156.136	AS37892 Cable Media WAIWAI Co.,Ltd.	`10.51ms` from Osaka, JP
43.203.70.232	AS16509 Amazon.com, Inc.	`0.18ms` from Seoul, KR
182.31.67.168	AS9694 Seokyung Cable Television Co.. Ltd.	`8.10ms` from Seoul, KR
89.76.153.120	AS9141 P4 Sp. z o.o.	`13.67ms` from Warsaw, PL
77.165.51.120	AS1136 KPN B.V.	`1.09ms` from Amsterdam, NL
147.135.16.40	AS16276 OVH SAS	`1.31ms` from Ashburn, US
69.250.157.152	AS7922 Comcast Cable Communications, LLC	`7.06ms` from Ashburn, US
97.177.9.120	AS6167 Verizon Business	`10.75ms` from Boston, US
156.216.120.56	AS8452 TE-AS	`3.33ms` from Cairo, EG
187.147.35.104	AS8151 UNINET	`14.21ms` from Cancún, MX
172.205.102.104	AS8075 Microsoft Corporation	`0.21ms` from Dublin, IE
116.62.163.232	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`5.01ms` from Hangzhou, CN
103.29.33.8	AS11179 Aryaka Networks, Inc.	`1.03ms` from Mumbai, IN
180.142.223.168	AS4134 CHINANET-BACKBONE	`4.50ms` from Nanning, CN
159.89.86.184	AS14061 DigitalOcean, LLC	`0.23ms` from New York City, US
187.74.90.152	AS27699 TELEFÔNICA BRASIL S.A	`2.88ms` from Osasco, BR
121.126.240.136	AS4766 Korea Telecom	`0.85ms` from Seoul, KR

Traceroute

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

traceroute -a -n -q1 -f3 -m7 203.237.99.164

traceroute to 203.237.99.164 (203.237.99.164): 7 hops max, 52 byte packets

3 [AS50673] 185.8.179.33 0.631 ms

4 [] 193.239.117.168 20.533 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Dronten, NL

On January 9th 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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