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
203.237.175.130 AS18031 Sangmyung University 1.17ms from Seoul, KR
203.237.195.75 AS4766 Korea Telecom 4.78ms from Seoul, KR
203.237.212.202 AS4766 Korea Telecom 4.96ms from Seoul, KR
203.237.227.67 AS4766 Korea Telecom 4.25ms from Seoul, KR
203.237.228.147 AS4766 Korea Telecom 4.59ms from Seoul, KR
203.237.169.204 AS18031 Sangmyung University 2.62ms from Seoul, KR
203.237.157.186 AS4766 Korea Telecom 4.59ms from Seoul, KR
203.237.168.85 AS18031 Sangmyung University 1.68ms from Seoul, KR
203.237.197.84 AS4766 Korea Telecom 5.03ms from Seoul, KR
203.237.216.110 AS9318 SK Broadband Co Ltd 3.90ms from Seoul, KR
203.237.181.7 AS18329 Sangmyung University 4.46ms from Seoul, KR
203.237.128.80 AS23983 Daejeon University 4.63ms 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
203.237.250.1 AS4766 Korea Telecom 1.35ms from Seoul, KR
203.237.159.11 AS4766 Korea Telecom 3.13ms from Seoul, KR
203.237.239.5 AS4766 Korea Telecom 6.31ms from Seoul, KR
203.237.232.10 AS4766 Korea Telecom 6.21ms from Seoul, KR
203.237.153.254 AS23983 Daejeon University 3.54ms from Seoul, KR
203.237.134.230 AS23983 Daejeon University 3.96ms from Seoul, KR
203.237.198.12 AS4766 Korea Telecom 5.60ms from Seoul, KR
203.237.204.196 AS4766 Korea Telecom 5.45ms from Seoul, KR
203.237.177.201 AS18329 Sangmyung University 4.63ms from Seoul, KR
203.237.180.168 AS18329 Sangmyung University 4.50ms from Seoul, KR
203.237.238.205 AS4766 Korea Telecom 7.40ms 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
62.163.234.1 AS33915 Vodafone Libertel B.V. 3.42ms from Amsterdam, NL
94.214.26.1 AS33915 Vodafone Libertel B.V. 5.68ms from Amsterdam, NL
176.180.246.193 AS5410 Bouygues Telecom SA 17.23ms from Aubervilliers, FR
171.101.182.1 AS17552 True Online 2.17ms from Bangkok, TH
110.170.214.1 AS7470 TRUE INTERNET Co.,Ltd. 1.32ms from Bangkok, TH
110.19.120.1 AS139007 UNICOM InnerMongolia province network 11.98ms from Beijing, CN
189.5.188.33 AS28573 Claro NXT Telecomunicacoes Ltda 3.90ms from Brasilia, BR
45.140.234.1 AS25274 Naracom Kft. 3.94ms from Budapest, HU
70.73.236.1 AS6327 Shaw Communications 1.75ms from Calgary, CA
24.88.231.177 AS11426 Charter Communications Inc 7.55ms from Charlotte, US
211.149.204.1 AS38283 CHINANET SiChuan Telecom Internet Data Center 2.10ms from Chengdu, CN
125.66.48.1 AS4134 CHINANET-BACKBONE 9.18ms from Chengdu, CN
38.69.52.161 AS174 Cogent Communications, LLC 0.46ms from Chicago, US
12.13.238.177 AS7018 AT&T Enterprises, LLC 5.63ms from Chicago, US
195.178.106.1 AS44388 IT CONCEPT SRL 0.34ms from Chisinau, MD
125.85.184.1 AS4134 CHINANET-BACKBONE 1.68ms from Chongqing, CN
211.172.58.49 AS18310 SK Broadband Co Ltd 6.34ms from Chuncheon, KR
83.93.23.1 AS3292 TDC Holding A/S 4.50ms from Copenhagen, DK
196.32.71.1 AS7303 Telecom Argentina S.A. 0.65ms from Cordoba, AR
68.97.164.1 AS22773 Cox Communications Inc. 5.25ms from Dallas, US
38.131.40.1 AS22898 ATLINK SERVICES, LLC 8.33ms from Dallas, US
147.142.206.65 AS553 BelWue-Koordination 3.86ms from Frankfurt am Main, DE
183.52.44.1 AS4134 CHINANET-BACKBONE 9.48ms from Guangzhou, CN
183.236.10.81 AS9808 China Mobile Communications Group Co., Ltd. 4.25ms from Guangzhou, CN
113.215.93.209 AS24139 Huashu media&Network Limited 5.64ms 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 -f2 -m7 203.237.164.47
traceroute to 203.237.164.47 (203.237.164.47): 7 hops max, 52 byte packets
2 [] 193.239.117.168 18.387 ms
3 *
4 [AS3786] 1.208.106.17 221.652 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Amsterdam, NL
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.

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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