203.237.128.0/20

AS23983  ·  Daejeon University

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Summary

Country South Korea
Domain kren.kr
ASN AS23983
Parent Range 203.237.128.0/17
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

Overlapping Ranges

BGP prefixes that contain 203.237.128.0/20

Range ASN Company Num of IPs
203.237.128.0/17 AS17614 Korean Education Network 32,768
203.237.128.0/17 AS4766 Korean Education Network 32,768
203.237.128.0/17 AS18026 Korean Education Network 32,768
203.237.128.0/17 AS23983 Korean Education Network 32,768
203.237.128.0/17 AS18031 Korean Education Network 32,768
203.237.128.0/17 AS3786 Korean Education Network 32,768
203.237.128.0/17 AS38694 Korean Education Network 32,768
203.237.128.0/17 AS9318 Korean Education Network 32,768
203.237.128.0/17 AS18319 Korean Education Network 32,768
203.237.128.0/17 AS18329 Korean Education Network 32,768

Nearby Ranges

BGP prefixes that overlap with 203.237.0.0/16

Range ASN Company Num of IPs
203.237.128.0/17 AS17614 Korean Education Network 32,768
203.237.128.0/17 AS18026 Korean Education Network 32,768
203.237.128.0/17 AS18031 Korean Education Network 32,768
203.237.128.0/17 AS18319 Korean Education Network 32,768
203.237.128.0/17 AS18329 Korean Education Network 32,768
203.237.128.0/17 AS23983 Korean Education Network 32,768
203.237.128.0/17 AS3786 Korean Education Network 32,768
203.237.128.0/17 AS38694 Korean Education Network 32,768
203.237.128.0/17 AS4766 Korean Education Network 32,768
203.237.128.0/17 AS9318 Korean Education Network 32,768
203.237.96.0/19 AS9754 Korean Education Network 8,192
203.237.64.0/19 AS9778 KISTI 8,192

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.237.128.80 dju.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

Pingable IPs

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

IP Address ASN Details
203.237.134.231 AS23983 Daejeon University 3.42ms from Seoul, KR
203.237.128.87 AS23983 Daejeon University 4.53ms from Seoul, KR
203.237.131.30 AS23983 Daejeon University 3.38ms 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
115.183.182.148 AS4808 China Unicom Beijing Province Network 4.82ms from Beijing, CN
84.185.114.180 AS3320 Deutsche Telekom AG 4.30ms from Berlin, DE
136.115.84.148 AS396982 Google LLC 0.12ms from Council Bluffs, US
62.216.181.164 AS25560 rh-tec Business GmbH 0.56ms from Frankfurt am Main, DE
151.80.106.36 AS16276 OVH SAS 0.12ms from Gravelines, FR
14.225.246.68 AS135905 VIETNAM POSTS AND TELECOMMUNICATIONS GROUP 1.34ms from Ho Chi Minh City, VN
94.99.12.228 AS25019 Saudi Telecom Company JSC 5.78ms from Jeddah, SA
35.211.152.100 AS15169 Google LLC 0.15ms from Moncks Corner, US
49.66.119.244 AS4134 CHINANET-BACKBONE 4.49ms from Nanjing, CN
61.206.74.132 AS10010 TOKAI Communications Corporation 6.23ms from Osaka, JP
13.208.173.84 AS16509 Amazon.com, Inc. 0.30ms from Osaka, JP
153.177.178.180 AS4713 NTT DOCOMO BUSINESS,Inc. 3.13ms from Osaka, JP
118.6.253.196 AS4713 NTT DOCOMO BUSINESS,Inc. 2.68ms from Osaka, JP
108.76.154.180 AS7018 AT&T Enterprises, LLC 5.31ms from San Jose, US
220.119.169.100 AS4766 Korea Telecom 7.78ms from Seoul, KR
92.64.123.4 AS1136 KPN B.V. 2.50ms from Amsterdam, NL
73.236.103.36 AS7922 Comcast Cable Communications, LLC 13.41ms from Ashburn, US
112.35.186.100 AS9808 China Mobile Communications Group Co., Ltd. 2.09ms from Beijing, CN
16.145.201.36 AS16509 Amazon.com, Inc. 0.13ms from Boardman, US
70.73.79.196 AS6327 Shaw Communications 8.48ms from Calgary, CA
98.215.126.4 AS7922 Comcast Cable Communications, LLC 5.60ms from Chicago, US
34.246.204.244 AS16509 Amazon.com, Inc. 0.21ms from Dublin, IE
154.196.52.36 AS62240 Clouvider 0.28ms from Frankfurt am Main, DE
93.218.6.196 AS3320 Deutsche Telekom AG 2.47ms from Hamburg, DE
47.149.178.84 AS5650 Frontier Communications of America, Inc. 3.25ms from Los Angeles, US

Traceroute

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

$
traceroute -a -n -q1 -f3 -m7 203.237.132.5
traceroute to 203.237.132.5 (203.237.132.5): 7 hops max, 52 byte packets
4 [] 110.93.252.136 0.448 ms
5 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Karachi, PK
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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