203.237.128.0/19

AS3786 · LG DACOM Corporation

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Summary

Country	South Korea
Domain	kren.kr
ASN	AS3786
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:        Jeollanam-do Naju-si Jinheung-gil
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:  2021-06-15T06:21:49Z
source:         APNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM70-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2024-07-09T23:56:03Z
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
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.
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IA142-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Seoul Gwanak-gu Gwanak-ro
address:        1
country:        KR
phone:          +82-2-882-5363
e-mail:         kindman@kren.kr
nic-hdl:        IM142-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

Overlapping Ranges

BGP prefixes that contain 203.237.128.0/19

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 are 9 domain names hosted across 6 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP

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

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

IP Address	ASN	Details
203.237.134.232	AS23983 Daejeon University	`3.76ms` from Seoul, KR
203.237.128.80	AS23983 Daejeon University	`4.16ms` from Seoul, KR
203.237.131.50	AS23983 Daejeon University	`4.11ms` from Seoul, KR
203.237.157.186	AS4766 Korea Telecom	`3.96ms` from Seoul, KR
203.237.156.240	AS4766 Korea Telecom	`4.66ms` from Seoul, KR
203.237.154.154	AS4766 Korea Telecom	`4.72ms` from Seoul, KR
203.237.153.250	AS23983 Daejeon University	`3.16ms` from Seoul, KR
203.237.159.11	AS4766 Korea Telecom	`3.08ms` 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
203.144.147.3	AS24042 Bangkok Airways Co., Ltd.	`2.66ms` from Bangkok, TH
41.23.142.131	AS36994 Vodacom	`11.26ms` from Cape Town, ZA
207.146.147.67	AS10770 AT&T Enterprises, LLC	`0.70ms` from Chicago, US
23.114.10.35	AS7018 AT&T Enterprises, LLC	`4.74ms` from Dallas, US
62.28.106.131	AS15525 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`0.95ms` from Lisbon, PT
20.204.218.195	AS8075 Microsoft Corporation	`0.14ms` from Lohogaon, IN
23.224.14.51	AS40065 CNSERVERS LLC	`0.25ms` from Los Angeles, US
188.44.37.3	AS2848 Federal State Budgetary Educational Institution of Higher Education Lomonosov Moscow State University	`1.40ms` from Moscow, RU
59.140.230.3	AS2516 KDDI CORPORATION	`4.75ms` from Osaka, JP
187.74.119.147	AS27699 TELEFÔNICA BRASIL S.A	`2.45ms` from Osasco, BR
203.217.209.3	AS45996 DAOU TECHNOLOGY	`1.02ms` from Seoul, KR
119.213.241.99	AS4766 Korea Telecom	`2.52ms` from Seoul, KR
47.100.66.19	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`2.47ms` from Shanghai, CN
129.126.161.51	AS17547 M1 NET LTD	`1.54ms` from Singapore, SG
90.144.90.3	AS1257 Tele2 Sverige AB	`1.19ms` from Stockholm, SE
202.222.207.51	AS59109 Hitachi,Ltd., Managed Services Business Division	`3.89ms` from Tokyo, JP
81.163.206.67	AS59782 ITB Sp. z o.o.	`4.53ms` from Warsaw, PL
94.182.93.3	AS31549 Aria Shatel PJSC	`17.38ms` from Yerevan, AM
20.105.172.35	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
101.28.22.211	AS4837 CHINA UNICOM China169 Backbone	`9.61ms` from Beijing, CN
184.54.246.3	AS10796 Charter Communications Inc	`19.74ms` from Columbus, US
66.203.115.163	AS396417 Salesforce, Inc.	`1.05ms` from Dallas, US
83.196.61.67	AS3215 Orange S.A.	`9.59ms` from Frankfurt am Main, DE
121.203.245.3	AS17924 SmarTone Mobile Communications Ltd	`1.31ms` from Hong Kong, HK
124.93.195.115	AS4837 CHINA UNICOM China169 Backbone	`9.32ms` from Liaoyang, CN

Traceroute

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

traceroute -a -n -q1 -f3 -m8 203.237.147.0

traceroute to 203.237.147.0 (203.237.147.0): 8 hops max, 52 byte packets

3 [AS9312] 103.193.131.76 0.49 ms

4 *

5 [] 36.255.56.179 0.311 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Hong Kong, HK

On November 14th 2025

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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