203.237.121.0/24

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 203.237.121.0/24

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 AS3786 Korean Education Network 32,768
203.237.128.0/17 AS23983 Korean Education Network 32,768
203.237.128.0/17 AS4766 Korean Education Network 32,768
203.237.32.0/19 AS18297 Gwangju Institute of Science and Technology 8,192
203.237.96.0/19 AS9754 Korean Education Network 8,192
203.237.64.0/19 AS9778 KISTI 8,192
203.237.0.0/19 AS10166 Korea Water Resources Corporation 8,192
203.237.202.0/23 AS18026 CHEJU NATIONAL UNIVERSITY 512
203.237.173.0/24 AS18031 SANGMYUNG UNIVERSITY 256
203.237.161.0/24 AS3786 Dongyang Technical College 256
203.237.164.0/24 AS3786 Dongyang Technical College 256
203.237.163.0/24 AS3786 Dongyang Technical College 256
203.237.166.0/24 AS3786 Dongyang Technical College 256
203.237.162.0/24 AS3786 Dongyang Technical College 256
203.237.167.0/24 AS3786 Dongyang Technical College 256
203.237.165.0/24 AS3786 Dongyang Technical College 256
203.237.172.0/24 AS3786 SANGMYUNG UNIVERSITY 256
203.237.160.0/24 AS3786 Dongyang Technical College 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
203.237.210.0/24 AS4766 useokUniversity 256
203.237.207.0/24 AS4766 useokUniversity 256
203.237.213.0/24 AS4766 useokUniversity 256
203.237.215.0/24 AS4766 useokUniversity 256
203.237.212.0/24 AS4766 useokUniversity 256
203.237.211.0/24 AS4766 useokUniversity 256
203.237.205.0/24 AS4766 useokUniversity 256
203.237.214.0/24 AS4766 useokUniversity 256
203.237.250.0/24 AS4766 Chungang University 256
203.237.158.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.157.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.156.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.191.0/24 AS4766 daekuUniversity of Education 256
203.237.209.0/24 AS4766 useokUniversity 256
203.237.206.0/24 AS4766 useokUniversity 256
203.237.159.0/24 AS4766 DAEJEON UNIVERSITY 256
203.237.204.0/24 AS4766 useokUniversity 256
203.237.225.0/24 AS4766 HALLYM COLLEGE 256
203.237.224.0/24 AS4766 DANKOOK UNIVERSITY 256
203.237.208.0/24 AS4766 useokUniversity 256
203.237.231.0/24 AS4766 HALLYM COLLEGE 256
203.237.223.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.219.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.190.0/24 AS9318 Shinhan University 256
203.237.222.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.221.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.218.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.226.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.216.0/24 AS9318 DANKOOK UNIVERSITY 256
203.237.217.0/24 AS9318 DANKOOK UNIVERSITY 256

Hosted domains

There are no domains currently hosted on this ASN.

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

Pingable IPs

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

IP Address ASN Details
203.237.121.250 AS9754 CHOSUN UNIVERSITY 6.25ms 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
107.212.242.184 AS7018 AT&T Enterprises, LLC 11.40ms from Chicago, US
98.231.163.168 AS7922 Comcast Cable Communications, LLC 12.60ms from Chicago, US
136.119.147.88 AS396982 Google LLC 0.13ms from Council Bluffs, US
117.208.164.136 AS9829 National Internet Backbone 8.02ms from Delhi, IN
97.178.205.40 AS6167 Verizon Business 17.87ms from Denver, US
184.52.47.232 AS6621 Hughes Network Systems, LLC 8.46ms from Lincoln, US
81.101.172.216 AS5089 Virgin Media Limited 5.95ms from London, GB
185.219.2.24 AS202514 KME srl 4.94ms from Milan, IT
204.74.24.8 AS32062 Armstrong World Industries, Inc. 7.17ms from Ashburn, US
77.105.42.216 AS9125 Drustvo za telekomunikacije Orion telekom doo Beograd-Zemun 2.28ms from Belgrade, RS
72.133.203.72 AS10796 Charter Communications Inc 6.82ms from Chicago, US
97.156.212.40 AS6167 Verizon Business 12.67ms from Chicago, US
113.166.13.168 AS45899 VNPT Corp 2.79ms from Da Nang, VN
185.145.157.8 AS64245 DigitalFyre Internet Solutions, LLC. 0.57ms from Frankfurt am Main, DE
125.210.130.40 AS24139 Huashu media&Network Limited 4.74ms from Hangzhou, CN
113.170.83.104 AS45899 VNPT Corp 2.39ms from Ho Chi Minh City, VN
124.56.168.72 AS17858 LG POWERCOMM 1.80ms from Incheon, KR
5.139.48.8 AS12389 PJSC Rostelecom 18.73ms from Moscow, RU
95.72.131.232 AS12389 PJSC Rostelecom 1.53ms from Moscow, RU
126.27.153.24 AS17676 SoftBank Corp. 14.11ms from Osaka, JP
2.91.233.24 AS25019 Saudi Telecom Company JSC 7.82ms from Riyadh, SA
153.198.30.24 AS4713 NTT DOCOMO BUSINESS,Inc. 7.93ms from Tokyo, JP
185.224.89.72 AS48635 Your Hosting B.V. 0.43ms from Amsterdam, NL
46.246.250.88 AS1241 Forthnet 1.88ms from Athens, GR
75.181.213.136 AS11426 Charter Communications Inc 4.94ms from Charlotte, US

Traceroute

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

$
traceroute -a -n -q1 203.237.121.250
traceroute to 203.237.121.250 (203.237.121.250): 64 hops max, 52 byte packets
1 [AS199524] 92.223.73.3 0.172 ms
2 *
3 *
4 [AS9286] 121.78.68.45 1.748 ms
6 *
7 *
8 [AS4766] 112.174.57.34 6.273 ms
10 [AS4766] 218.157.75.226 5.954 ms
11 [AS9754] 203.237.127.75 7.651 ms
12 *
13 *
Measurement taken from IPinfo ProbeNet in Seoul, KR
On

What are IP address ranges?

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