1. All IP Ranges
  2. 203.0.0.0/8
  3. 203.230.0.0/16
  4. AS4766  | 203.230.128.0/17

203.230.128.0/17

AS4766  ·  Korea Telecom

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Summary

Country South Korea
Domain kren.kr
ASN AS4766
Registry APNIC
ID KREN

WHOIS Details

inetnum:        203.230.192.0 - 203.230.255.255
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:  2017-02-02T04:55:24Z
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:        203.230.192.0 - 203.230.255.255
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 203.230.128.0/17

Range ASN Company Num of IPs
203.230.208.0/24 AS10053 Yeonsung University 256
203.230.209.0/24 AS10053 Yeonsung University 256
203.230.240.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.241.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.242.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.243.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.252.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.253.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.214.0/24 AS18028 Gyeongsang National University 256
203.230.198.0/24 AS18329 SANGMYUNG UNIVERSITY 256
203.230.199.0/24 AS3786 Kkottongnae Hyundo University of Social Welfare 256
203.230.218.0/24 AS3786 Korea Soongsil Cyber University 256
203.230.132.0/24 AS4766 Appeals Commission for Education 256
203.230.219.0/24 AS4766 Chungkang College Of Cultural Industries 256
203.230.254.0/24 AS4766 Choonhae College 256
203.230.255.0/24 AS4766 Choonhae College 256
203.230.196.0/23 AS18329 SANGMYUNG UNIVERSITY 512
203.230.212.0/23 AS18028 Gyeongsang National University 512
203.230.192.0/22 AS18329 SANGMYUNG UNIVERSITY 1,024
203.230.160.0/19 AS45377 Korea Telecom 8,192

Nearby Ranges

BGP prefixes that overlap with 203.230.0.0/16

Range ASN Company Num of IPs
203.230.160.0/19 AS45377 Korea Telecom 8,192
203.230.32.0/20 AS17595 Korea Institute of Nuclear Safety 4,096
203.230.80.0/20 AS4766 Korean Education Network 4,096
203.230.64.0/21 AS1237 KISTI 2,048
203.230.24.0/21 AS1237 Korea Institute of Science and Technology Information 2,048
203.230.192.0/22 AS18329 SANGMYUNG UNIVERSITY 1,024
203.230.212.0/23 AS18028 Gyeongsang National University 512
203.230.4.0/23 AS45363 Sun Moon University 512
203.230.196.0/23 AS18329 SANGMYUNG UNIVERSITY 512
203.230.16.0/23 AS1237 Korea Institute of Science and Technology Information 512
203.230.199.0/24 AS3786 Kkottongnae Hyundo University of Social Welfare 256
203.230.218.0/24 AS3786 Korea Soongsil Cyber University 256
203.230.132.0/24 AS4766 Appeals Commission for Education 256
203.230.219.0/24 AS4766 Chungkang College Of Cultural Industries 256
203.230.254.0/24 AS4766 Choonhae College 256
203.230.255.0/24 AS4766 Choonhae College 256
203.230.214.0/24 AS18028 Gyeongsang National University 256
203.230.209.0/24 AS10053 Yeonsung University 256
203.230.240.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.241.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.242.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.243.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.252.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.253.0/24 AS18023 Korea Maritime University(KMU) 256
203.230.208.0/24 AS10053 Yeonsung University 256
203.230.198.0/24 AS18329 SANGMYUNG UNIVERSITY 256

Hosted domains

There are 22 domain names hosted across 9 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
203.230.220.63 chunghyunfoundation.org 1
203.230.200.18 hanil.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

2,153 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
203.230.223.156 AS4766 Korea Telecom 2.33ms from Seoul, KR
203.230.209.22 AS10053 yeonsung University 1.57ms from Seoul, KR
203.230.244.6 AS18023 Korea Maritime and Ocean University 6.35ms from Seoul, KR
203.230.212.5 AS18028 GyeongSang National University 9.18ms from Seoul, KR
203.230.134.35 AS4766 Korea Telecom 7.42ms from Seoul, KR
203.230.220.188 AS4766 Korea Telecom 2.32ms from Seoul, KR
203.230.196.10 AS18329 Sangmyung University 4.70ms from Seoul, KR
203.230.193.9 AS18329 Sangmyung University 4.64ms from Seoul, KR
203.230.198.79 AS18329 Sangmyung University 4.56ms from Seoul, KR
203.230.255.1 AS4766 Korea Telecom 7.17ms from Seoul, KR
203.230.219.81 AS4766 Korea Telecom 2.33ms from Seoul, KR
203.230.195.24 AS18329 Sangmyung University 4.46ms from Seoul, KR
203.230.135.254 AS4766 Korea Telecom 3.85ms from Seoul, KR
203.230.200.1 AS4766 Korea Telecom 4.59ms from Seoul, KR
203.230.217.248 AS4766 Korea Telecom 1.95ms from Seoul, KR
203.230.221.52 AS4766 Korea Telecom 2.35ms from Seoul, KR
203.230.192.11 AS18329 Sangmyung University 4.34ms from Seoul, KR
203.230.197.79 AS18329 Sangmyung University 4.53ms from Seoul, KR
203.230.150.199 AS9523 Mokwon University 5.01ms from Seoul, KR
203.230.137.118 AS9523 Mokwon University 3.39ms from Seoul, KR
203.230.214.104 AS18028 GyeongSang National University 7.57ms from Seoul, KR
203.230.142.114 AS9523 Mokwon University 6.22ms from Seoul, KR
203.230.208.196 AS10053 yeonsung University 1.36ms from Seoul, KR
203.230.222.6 AS4766 Korea Telecom 2.33ms from Seoul, KR
203.230.152.217 AS10046 HOWON UNIVERSITY 7.34ms 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
212.154.150.177 AS50482 JSC Kazakhtelecom 0.55ms from Almaty, KZ
143.177.192.1 AS50266 Odido Netherlands B.V. 4.59ms from Amsterdam, NL
34.144.149.241 AS396982 Google LLC 0.14ms from Ashburn, US
172.203.218.145 AS8075 Microsoft Corporation 0.69ms from Ashburn, US
12.177.95.129 AS7018 AT&T Enterprises, LLC 10.84ms from Atlanta, US
116.78.8.1 AS4837 CHINA UNICOM China169 Backbone 5.14ms from Beijing, CN
43.254.173.193 AS63647 Beijing WangJu Interworking Information Technology Co. LTD 3.05ms from Beijing, CN
186.146.80.1 AS10620 Telmex Colombia S.A. 14.26ms from Bogota, CO
177.8.75.193 AS262191 LIBERTY NETWORKS DE COLOMBIA S.A.S 0.70ms from Bogota, CO
216.238.174.145 AS13536 FirstLight Fiber, Inc. 3.33ms from Boston, US
4.152.158.129 AS8075 Microsoft Corporation 0.17ms from Boydton, US
87.67.243.1 AS5432 Proximus NV 1.98ms from Brussels, BE
105.159.168.1 AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM 4.66ms from Casablanca, MA
97.95.175.241 AS20115 Charter Communications LLC 13.97ms from Chicago, US
181.88.186.33 AS7303 Telecom Argentina S.A. 0.59ms from Cordoba, AR
123.164.177.129 AS4134 CHINANET-BACKBONE 18.46ms from Dalian, CN
209.240.172.97 AS11238 NetWest Online, Inc. 9.02ms from Dallas, US
208.180.209.1 AS19108 Optimum 6.89ms from Dallas, US
76.122.184.1 AS7922 Comcast Cable Communications, LLC 2.06ms from Detroit, US
168.197.31.97 AS264985 LUNE FIBRA LTDA 19.30ms from Fortaleza, BR
190.62.65.1 AS14754 TELECOMUNICACIONES DE GUATEMALA, SOCIEDAD ANONIMA 4.85ms from Guatemala City, GT
118.143.30.97 AS9304 HGC Global Communications Limited 1.60ms from Hong Kong, HK
76.83.168.1 AS20001 Charter Communications Inc 2.39ms from Honolulu, US
60.166.35.17 AS4134 CHINANET-BACKBONE 6.25ms from Huai'an, CN
139.195.228.1 AS23700 Linknet-Fastnet ASN 4.63ms from Jakarta, ID

Traceroute

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

$
traceroute -a -n -q1 -m4 203.230.144.51
traceroute to 203.230.144.51 (203.230.144.51): 4 hops max, 52 byte packets
2 *
3 *
4 *
Measurement taken from IPinfo ProbeNet in Cordoba, AR
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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