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:        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:        203.237.128.0 - 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
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

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
203.237.193.172	AS4766 Korea Telecom	`4.87ms` from Seoul, KR
203.237.212.202	AS4766 Korea Telecom	`4.30ms` from Seoul, KR
203.237.157.186	AS4766 Korea Telecom	`3.96ms` from Seoul, KR
203.237.177.141	AS18329 Sangmyung University	`4.26ms` from Seoul, KR
203.237.182.18	AS18329 Sangmyung University	`4.65ms` from Seoul, KR
203.237.197.204	AS4766 Korea Telecom	`4.88ms` from Seoul, KR
203.237.159.11	AS4766 Korea Telecom	`3.08ms` from Seoul, KR
203.237.169.97	AS18031 Sangmyung University	`2.94ms` from Seoul, KR
203.237.181.41	AS18329 Sangmyung University	`4.53ms` from Seoul, KR
203.237.215.94	AS4766 Korea Telecom	`4.62ms` from Seoul, KR
203.237.154.154	AS4766 Korea Telecom	`4.72ms` from Seoul, KR
203.237.134.232	AS23983 Daejeon University	`3.76ms` from Seoul, KR
203.237.192.231	AS4766 Korea Telecom	`4.67ms` from Seoul, KR
203.237.170.248	AS18031 Sangmyung University	`211.28ms` from South Bend, US
203.237.168.85	AS18031 Sangmyung University	`1.61ms` from Seoul, KR
203.237.175.130	AS18031 Sangmyung University	`1.05ms` from Seoul, KR
203.237.153.250	AS23983 Daejeon University	`3.16ms` from Seoul, KR
203.237.196.126	AS4766 Korea Telecom	`5.35ms` from Seoul, KR
203.237.204.196	AS4766 Korea Telecom	`5.36ms` from Seoul, KR
203.237.183.137	AS18329 Sangmyung University	`4.51ms` from Seoul, KR
203.237.227.67	AS4766 Korea Telecom	`4.87ms` from Seoul, KR
203.237.211.101	AS4766 Korea Telecom	`4.33ms` from Seoul, KR
203.237.195.254	AS4766 Korea Telecom	`4.83ms` from Seoul, KR
203.237.228.147	AS4766 Korea Telecom	`4.05ms` from Seoul, KR
203.237.156.240	AS4766 Korea Telecom	`4.66ms` 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
94.209.56.1	AS33915 Vodafone Libertel B.V.	`4.58ms` from Amsterdam, NL
61.90.83.1	AS17552 True Online	`2.30ms` from Bangkok, TH
89.28.243.225	AS206240 pdv-systeme Sachsen GmbH	`6.21ms` from Berlin, DE
186.145.253.1	AS10620 Telmex Colombia S.A.	`13.15ms` from Bogota, CO
188.251.170.1	AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`0.71ms` from Braga, PT
195.20.124.81	AS25403 Firm Delta PE	`6.42ms` from Budapest, HU
70.73.236.1	AS6327 Shaw Communications	`1.81ms` from Calgary, CA
72.2.35.81	AS6327 Shaw Communications	`1.05ms` from Calgary, CA
183.215.191.1	AS56047 China Mobile communications corporation	`2.05ms` from Changsha, CN
122.165.62.1	AS24560 Bharti Airtel Ltd., Telemedia Services	`0.84ms` from Chennai, IN
12.69.199.145	AS7018 AT&T Enterprises, LLC	`6.11ms` from Chicago, US
75.185.134.1	AS10796 Charter Communications Inc	`5.67ms` from Columbus, US
64.18.32.1	AS19616 ACCESS	`6.47ms` from Columbus, US
194.55.98.193	AS202373 Stadtwerke Rostock AG	`7.21ms` from Copenhagen, DK
176.21.169.129	AS3292 TDC Holding A/S	`2.87ms` from Copenhagen, DK
86.48.91.65	AS47292 Sentia Denmark A/S	`0.89ms` from Copenhagen, DK
184.179.121.1	AS22773 Cox Communications Inc.	`12.26ms` from Dallas, US
98.53.230.209	AS7922 Comcast Cable Communications, LLC	`5.51ms` from Denver, US
144.43.244.49	AS212157 baten-lastendienst Logius	`2.89ms` from Dronten, NL
213.132.46.129	AS15802 Emirates Integrated Telecommunications Company PJSC	`2.72ms` from Dubai, AE
74.204.24.193	AS26554 US Signal Company, L.L.C.	`2.50ms` from Flint, US
117.27.179.97	AS4134 CHINANET-BACKBONE	`7.98ms` from Fuzhou, CN
213.41.22.49	AS8220 COLT Technology Services Group Limited	`3.70ms` from Geneve, CH
122.243.94.1	AS4134 CHINANET-BACKBONE	`8.19ms` from Hangzhou, CN
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 -f2 -m10 203.237.191.160

traceroute to 203.237.191.160 (203.237.191.160): 10 hops max, 52 byte packets

2 [AS3257] 212.222.27.246 10.573 ms

3 [AS3257] 89.149.128.174 143.63 ms

4 [AS3257] 76.74.48.138 143.184 ms

5 [AS4766] 112.174.87.5 273.725 ms

6 [AS4766] 112.174.91.69 268.298 ms

7 [AS4766] 112.174.48.1 276.241 ms

8 *

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Measurement taken from

IPinfo ProbeNet in Madrid, ES

On November 14th 2025

What are IP address ranges?

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