203.237.128.0/17

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kren.kr
ASN	AS4766
Registry	APNIC
ID	KREN

WHOIS Details

inetnum:        203.237.128.0 - 203.237.255.255
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:  2017-02-02T04:55:27Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        Jeollanam-do Naju-si Jinheung-gil
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:  2021-06-15T06:21:49Z
source:         APNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM70-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2024-07-09T23:56:03Z
source:         APNIC

inetnum:        203.237.128.0 - 203.237.255.255
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
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.
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IA142-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM142-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

Nearby Ranges

BGP prefixes that overlap with 203.237.0.0/16

Range	ASN	Company	Num of IPs
203.237.96.0/19	AS9754	Korean Education Network	8,192
203.237.64.0/19	AS9778	KISTI	8,192

Hosted domains

There are 27 domain names hosted across 22 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.237.159.28	djuds.or.kr	5
203.237.192.78	dnue.ac.kr	1
203.237.167.3	dytc.ac.kr	1
203.237.159.63	djumcss.or.kr	1
203.237.235.206	bnue.ac.kr	1
203.237.194.180	icn.re.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

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

IP Address	ASN	Details
203.237.183.137	AS18329 Sangmyung University	`4.51ms` from Seoul, KR
203.237.211.101	AS4766 Korea Telecom	`4.33ms` from Seoul, KR
203.237.251.2	AS4766 Korea Telecom	`1.41ms` from Seoul, KR
203.237.177.141	AS18329 Sangmyung University	`4.26ms` from Seoul, KR
203.237.179.77	AS18329 Sangmyung University	`4.49ms` from Seoul, KR
203.237.204.196	AS4766 Korea Telecom	`5.36ms` from Seoul, KR
203.237.169.97	AS18031 Sangmyung University	`2.94ms` from Seoul, KR
203.237.232.13	AS4766 Korea Telecom	`6.56ms` from Seoul, KR
203.237.250.254	AS4766 Korea Telecom	`1.12ms` from Seoul, KR
203.237.180.155	AS18329 Sangmyung University	`4.31ms` from Seoul, KR
203.237.176.47	AS18329 Sangmyung University	`4.25ms` from Seoul, KR
203.237.173.65	AS18031 Sangmyung University	`4.19ms` from Seoul, KR
203.237.178.250	AS18329 Sangmyung University	`4.22ms` from Seoul, KR
203.237.194.4	AS4766 Korea Telecom	`4.41ms` from Seoul, KR
203.237.196.126	AS4766 Korea Telecom	`5.35ms` from Seoul, KR
203.237.197.204	AS4766 Korea Telecom	`4.88ms` from Seoul, KR
203.237.193.172	AS4766 Korea Telecom	`4.87ms` from Seoul, KR
203.237.170.248	AS18031 Sangmyung University	`211.28ms` from South Bend, US
203.237.134.232	AS23983 Daejeon University	`3.76ms` from Seoul, KR
203.237.201.254	AS4766 Korea Telecom	`4.88ms` from Seoul, KR
203.237.192.231	AS4766 Korea Telecom	`4.67ms` from Seoul, KR
203.237.225.4	AS4766 Korea Telecom	`4.75ms` from Seoul, KR
203.237.181.41	AS18329 Sangmyung University	`4.53ms` from Seoul, KR
203.237.174.188	AS18031 Sangmyung University	`2.97ms` from Seoul, KR
203.237.168.85	AS18031 Sangmyung University	`1.61ms` from Seoul, KR

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
62.195.167.1	AS33915 Vodafone Libertel B.V.	`1.43ms` from Amsterdam, NL
82.23.158.177	AS6079 RCN	`1.46ms` from Ashburn, US
12.216.106.161	AS7018 AT&T Enterprises, LLC	`1.59ms` from Atlanta, US
49.49.136.1	AS45758 Triple T Broadband Public Company Limited	`3.02ms` from Bangkok, TH
50.227.203.225	AS7922 Comcast Cable Communications, LLC	`1.21ms` from Boston, US
213.213.248.1	AS12392 VOO S.A.	`5.46ms` from Brussels, BE
186.136.57.1	AS7303 Telecom Argentina S.A.	`7.32ms` from Buenos Aires, AR
183.215.191.1	AS56047 China Mobile communications corporation	`2.05ms` from Changsha, CN
76.49.39.1	AS11426 Charter Communications Inc	`4.56ms` from Charlotte, US
101.204.84.1	AS4837 CHINA UNICOM China169 Backbone	`2.92ms` from Chengdu, CN
64.27.228.1	AS12067 ShawneeLink Corporation	`10.50ms` from Chicago, US
207.135.189.209	AS16399 First Communications LLC	`1.16ms` from Chicago, US
50.27.232.1	AS19108 Optimum	`12.96ms` from Chicago, US
24.247.230.209	AS20115 Charter Communications LLC	`6.74ms` from Chicago, US
99.101.24.1	AS7018 AT&T Enterprises, LLC	`6.29ms` from Columbus, US
212.10.252.1	AS39642 Norlys Digital A/S	`5.31ms` from Copenhagen, DK
200.17.204.129	AS10881 FUNPAR - Fundacao da UFPR para o DCTC	`0.42ms` from Curitiba, BR
221.208.208.193	AS4837 CHINA UNICOM China169 Backbone	`18.11ms` from Dalian, CN
66.242.53.129	AS14861 ISC Group	`7.02ms` from Detroit, US
68.61.5.1	AS7922 Comcast Cable Communications, LLC	`7.16ms` from Detroit, US
18.158.19.225	AS16509 Amazon.com, Inc.	`0.13ms` from Frankfurt am Main, DE
24.222.29.65	AS11260 EastLink	`1.07ms` from Halifax, CA
221.12.72.65	AS4837 CHINA UNICOM China169 Backbone	`7.72ms` from Hangzhou, CN
154.83.230.33	AS139880 OWGELS INTERNATIONAL CO., LIMITED	`0.91ms` from Hong Kong, HK
176.232.216.1	AS34984 Superonline Iletisim Hizmetleri A.S.	`3.71ms` from Istanbul, TR

Traceroute

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

traceroute -a -n -q1 203.237.182.252

traceroute to 203.237.182.252 (203.237.182.252): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.27 0.068 ms

2 [AS4766] 218.145.32.254 7.343 ms

3 *

4 *

5 [AS4766] 112.174.117.106 3.23 ms

6 [AS4766] 112.188.165.134 3.923 ms

7 [AS4766] 175.204.250.26 4.733 ms

8 [AS18329] 211.229.181.2 4.088 ms

9 *

10 [AS18329] 203.237.182.252 5.258 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On November 14th 2025

What are IP address ranges?

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