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:        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

Nearby Ranges

BGP prefixes that overlap with 203.237.0.0/16

Range	ASN	Company	Num of IPs
203.237.96.0/19	AS9754	Korean Education Network	8,192
203.237.64.0/19	AS9778	KISTI	8,192

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
203.237.159.28	djuds.or.kr	5
203.237.192.78	dnue.ac.kr	1
203.237.167.3	dytc.ac.kr	1
203.237.159.63	djumcss.or.kr	1
203.237.235.206	bnue.ac.kr	1
203.237.194.180	icn.re.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

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

IP Address	ASN	Details
203.237.183.137	AS18329 Sangmyung University	`4.51ms` from Seoul, KR
203.237.211.101	AS4766 Korea Telecom	`4.33ms` from Seoul, KR
203.237.251.2	AS4766 Korea Telecom	`1.41ms` from Seoul, KR
203.237.177.141	AS18329 Sangmyung University	`4.26ms` from Seoul, KR
203.237.179.77	AS18329 Sangmyung University	`4.49ms` from Seoul, KR
203.237.204.196	AS4766 Korea Telecom	`5.36ms` from Seoul, KR
203.237.169.97	AS18031 Sangmyung University	`2.94ms` from Seoul, KR
203.237.232.13	AS4766 Korea Telecom	`6.56ms` from Seoul, KR
203.237.250.254	AS4766 Korea Telecom	`1.12ms` from Seoul, KR
203.237.180.155	AS18329 Sangmyung University	`4.31ms` from Seoul, KR
203.237.176.47	AS18329 Sangmyung University	`4.25ms` from Seoul, KR
203.237.173.65	AS18031 Sangmyung University	`4.19ms` from Seoul, KR
203.237.178.250	AS18329 Sangmyung University	`4.22ms` from Seoul, KR
203.237.194.4	AS4766 Korea Telecom	`4.41ms` from Seoul, KR
203.237.196.126	AS4766 Korea Telecom	`5.35ms` from Seoul, KR
203.237.197.204	AS4766 Korea Telecom	`4.88ms` from Seoul, KR
203.237.193.172	AS4766 Korea Telecom	`4.87ms` from Seoul, KR
203.237.170.248	AS18031 Sangmyung University	`211.28ms` from South Bend, US
203.237.134.232	AS23983 Daejeon University	`3.76ms` from Seoul, KR
203.237.201.254	AS4766 Korea Telecom	`4.88ms` from Seoul, KR
203.237.192.231	AS4766 Korea Telecom	`4.67ms` from Seoul, KR
203.237.225.4	AS4766 Korea Telecom	`4.75ms` from Seoul, KR
203.237.181.41	AS18329 Sangmyung University	`4.53ms` from Seoul, KR
203.237.174.188	AS18031 Sangmyung University	`2.97ms` from Seoul, KR
203.237.168.85	AS18031 Sangmyung University	`1.61ms` 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
14.96.184.81	AS45820 Tata Teleservices ISP AS	`2.41ms` from Ahmedabad, IN
209.158.222.1	AS701 Verizon Business	`9.03ms` from Ashburn, US
185.153.69.33	AS16326 SmalS vzw	`1.75ms` from Brussels, BE
50.234.13.113	AS7922 Comcast Cable Communications, LLC	`1.15ms` from Chicago, US
47.24.108.1	AS20115 Charter Communications LLC	`4.51ms` from Dallas, US
23.238.63.1	AS54290 Hostwinds LLC.	`0.46ms` from Dallas, US
156.47.171.1	AS6300 Fidium	`5.32ms` from Dallas, US
4.42.149.145	AS3356 Level 3 Parent, LLC	`0.34ms` from Denver, US
109.104.146.1	AS200325 BUNNYWAY, informacijske storitve d.o.o.	`0.89ms` from Frankfurt am Main, DE
147.142.206.65	AS553 BelWue-Koordination	`3.85ms` from Frankfurt am Main, DE
163.179.127.1	AS17816 China Unicom IP network China169 Guangdong province	`6.52ms` from Guangzhou, CN
60.191.75.129	AS4134 CHINANET-BACKBONE	`4.16ms` from Hangzhou, CN
221.127.163.129	AS9304 HGC Global Communications Limited	`1.00ms` from Hong Kong, HK
218.2.21.129	AS4134 CHINANET-BACKBONE	`0.50ms` from Huai'an, CN
122.175.2.1	AS24560 Bharti Airtel Ltd., Telemedia Services	`1.38ms` from Hyderabad, IN
112.37.65.1	AS24444 Shandong Mobile Communication Company Limited	`2.16ms` from Jinan, CN
111.17.213.49	AS24444 Shandong Mobile Communication Company Limited	`0.80ms` from Jinan, CN
156.155.101.33	AS37611 AFRIHOST SP (PTY) LTD	`0.25ms` from Johannesburg, ZA
86.30.246.33	AS5089 Virgin Media Limited	`15.06ms` from London, GB
155.0.239.1	AS37532 Zambia Research and Education Network (ZAMREN)	`17.39ms` from Lusaka, ZM
146.158.240.1	AS12479 Orange Espagne SA	`7.21ms` from Madrid, ES
188.78.83.1	AS12479 Orange Espagne SA	`6.24ms` from Madrid, ES
206.214.228.97	AS14593 Space Exploration Technologies Corporation	`0.11ms` from Manila, PH
205.164.205.1	AS11580 Island Networks Ltd	`19.24ms` from Miami, US
216.188.196.65	AS15011 Jaguar Communications	`2.46ms` from Minneapolis, US

Traceroute

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

traceroute -a -n -q1 203.237.182.252

traceroute to 203.237.182.252 (203.237.182.252): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.27 0.068 ms

2 [AS4766] 218.145.32.254 7.343 ms

3 *

4 *

5 [AS4766] 112.174.117.106 3.23 ms

6 [AS4766] 112.188.165.134 3.923 ms

7 [AS4766] 175.204.250.26 4.733 ms

8 [AS18329] 211.229.181.2 4.088 ms

9 *

10 [AS18329] 203.237.182.252 5.258 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

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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