1. All IP Ranges
  2. 203.0.0.0/8
  3. 203.237.0.0/16
  4. AS4766  | 203.237.128.0/17

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:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        [email protected] 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:         [email protected]
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:        [email protected] 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:         [email protected]
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:         [email protected]
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 are contained by 203.237.128.0/17

Range ASN Company Num of IPs
203.237.250.0/24 AS4766 Chungang University 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
203.237.190.0/24 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
203.237.219.0/24 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
203.237.226.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.168.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.169.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.170.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.171.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.172.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.173.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.174.0/24 AS18031 SANGMYUNG UNIVERSITY 256
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

Nearby Ranges

BGP prefixes that overlap with 203.237.0.0/16

Range ASN Company Num of IPs
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 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
203.237.159.44 djumc.or.kr 2
203.237.159.62 djumccs.or.kr 1
203.237.211.217 aps.or.kr 1
203.237.194.180 icn.re.kr 1
203.237.167.3 dytc.ac.kr 1
203.237.235.50 bnue.ac.kr 1
203.237.159.63 djumcss.or.kr 1
203.237.192.78 dnue.ac.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

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

IP Address ASN Details
203.237.235.60 AS4766 Korea Telecom 6.48ms from Seoul, KR
203.237.212.202 AS4766 Korea Telecom 4.96ms from Seoul, KR
203.237.169.204 AS18031 Sangmyung University 2.62ms from Seoul, KR
203.237.175.130 AS18031 Sangmyung University 1.17ms from Seoul, KR
203.237.176.17 AS18329 Sangmyung University 4.72ms from Seoul, KR
203.237.182.227 AS18329 Sangmyung University 4.61ms from Seoul, KR
203.237.238.205 AS4766 Korea Telecom 7.40ms from Seoul, KR
203.237.254.160 AS38694 CHEONGJU NATIONAL UNIVERSITY OF EDCATION 3.21ms from Seoul, KR
203.237.156.84 AS4766 Korea Telecom 4.73ms from Seoul, KR
203.237.228.147 AS4766 Korea Telecom 4.59ms from Seoul, KR
203.237.195.75 AS4766 Korea Telecom 4.78ms from Seoul, KR
203.237.154.154 AS4766 Korea Telecom 5.12ms from Seoul, KR
203.237.128.80 AS23983 Daejeon University 4.63ms from Seoul, KR
203.237.250.1 AS4766 Korea Telecom 1.35ms from Seoul, KR
203.237.193.4 AS4766 Korea Telecom 5.58ms from Seoul, KR
203.237.197.84 AS4766 Korea Telecom 5.03ms from Seoul, KR
203.237.131.30 AS23983 Daejeon University 3.76ms from Seoul, KR
203.237.159.11 AS4766 Korea Telecom 3.13ms from Seoul, KR
203.237.196.196 AS4766 Korea Telecom 4.95ms from Seoul, KR
203.237.180.168 AS18329 Sangmyung University 4.50ms from Seoul, KR
203.237.181.7 AS18329 Sangmyung University 4.46ms from Seoul, KR
203.237.174.188 AS18031 Sangmyung University 3.12ms from Seoul, KR
203.237.183.25 AS18329 Sangmyung University 4.27ms from Seoul, KR
203.237.173.109 AS18031 Sangmyung University 3.29ms from Seoul, KR
203.237.177.201 AS18329 Sangmyung University 4.63ms 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
154.246.25.145 AS36947 Telecom Algeria 14.19ms from Algiers, DZ
92.64.5.209 AS1136 KPN B.V. 1.74ms from Amsterdam, NL
84.207.224.225 AS13237 euNetworks GmbH 0.51ms from Amsterdam, NL
185.133.111.1 AS57112 F2X Operator B.V. 0.14ms from Amsterdam, NL
96.192.93.209 AS7922 Comcast Cable Communications, LLC 2.30ms from Ashburn, US
162.198.252.33 AS7018 AT&T Enterprises, LLC 13.84ms from Atlanta, US
54.191.88.97 AS16509 Amazon.com, Inc. 0.13ms from Boardman, US
201.244.33.17 AS19429 ETB - Colombia 0.70ms from Bogota, CO
140.234.250.1 AS6932 EBSCO Publishing 0.42ms from Boston, US
20.209.110.161 AS8075 Microsoft Corporation 0.36ms from Boydton, US
201.7.41.1 AS8167 V tal 0.92ms from Brasilia, BR
213.235.84.193 AS6740 CEZNET s.r.o. 2.37ms from Bratislava, SK
81.244.134.81 AS5432 Proximus NV 1.15ms from Brussels, BE
88.231.140.1 AS9121 Turk Telekomunikasyon Anonim Sirketi 9.17ms from Bursa, TR
101.204.84.1 AS4837 CHINA UNICOM China169 Backbone 2.85ms from Chengdu, CN
210.18.96.81 AS9583 Sify Limited 6.84ms from Chennai, IN
87.255.78.225 AS15836 Arax-Impex s.r.l. 0.48ms from Chisinau, MD
149.3.187.1 AS43870 DANIS SRL 0.61ms from Chisinau, MD
74.142.232.177 AS10796 Charter Communications Inc 3.60ms from Columbus, US
142.79.108.1 AS53508 Cablelynx 3.89ms from Dallas, US
176.202.83.129 AS8781 Ooredoo Q.S.C. 0.22ms from Doha, QA
37.208.4.161 AS198612 Wekudata AB 1.33ms from Falkenberg, SE
84.171.104.241 AS3320 Deutsche Telekom AG 5.70ms from Frankfurt am Main, DE
115.204.80.1 AS4134 CHINANET-BACKBONE 8.08ms from Hangzhou, CN
218.74.183.65 AS4134 CHINANET-BACKBONE 6.17ms from Hangzhou, CN

Traceroute

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

$
traceroute -a -n -q1 -f5 -m12 203.237.161.50
traceroute to 203.237.161.50 (203.237.161.50): 12 hops max, 52 byte packets
5 [AS9498] 125.18.194.69 4.695 ms
6 [AS9498] 116.119.61.234 110.757 ms
7 [] 193.239.117.168 272.377 ms
8 *
9 [AS3786] 61.42.202.93 292.246 ms
10 *
11 *
12 *
Measurement taken from IPinfo ProbeNet in Ahmedabad, IN
On

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.

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