203.249.0.0/17

AS4766  ·  Korea Telecom

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Summary

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

WHOIS Details

inetnum:        203.249.0.0 - 203.249.63.255
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:  2017-02-02T04:55:31Z
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:        203.249.0.0 - 203.249.63.255
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 are contained by 203.249.0.0/17

Range ASN Company Num of IPs
203.249.47.0/24 AS10071 Anyang University 256
203.249.34.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.36.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.40.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.41.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.42.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.43.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.44.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.45.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.122.0/24 AS3786 SEOKYEONG UNIVERSITY 256
203.249.123.0/24 AS3786 SEOKYEONG UNIVERSITY 256
203.249.37.0/24 AS3786 CHONGSHIN UNIVERSITY 256
203.249.39.0/24 AS3786 Dongyang Technical College 256
203.249.11.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.12.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.13.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.14.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.15.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.16.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.32.0/24 AS4766 CHUNGBUK PROVINCIAL UNIVERSITY OF SCIENCE & TECHNOLOGY 256
203.249.38.0/24 AS55611 KYUNGMIN 256
203.249.126.0/24 AS9318 GACHON University 256
203.249.127.0/24 AS9318 GACHON University 256
203.249.33.0/24 AS9318 GACHON University 256
203.249.35.0/24 AS9867 Jeonju Technical College 256
203.249.114.0/23 AS9523 Mokwon University 512

Nearby Ranges

BGP prefixes that overlap with 203.249.0.0/16

Range ASN Company Num of IPs
203.249.160.0/19 AS4766 Korea Telecom 8,192
203.249.160.0/19 AS17593 Korea Telecom 8,192
203.249.114.0/23 AS9523 Mokwon University 512
203.249.40.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.41.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.42.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.43.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.44.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.45.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.122.0/24 AS3786 SEOKYEONG UNIVERSITY 256
203.249.123.0/24 AS3786 SEOKYEONG UNIVERSITY 256
203.249.37.0/24 AS3786 CHONGSHIN UNIVERSITY 256
203.249.39.0/24 AS3786 Dongyang Technical College 256
203.249.11.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.12.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.13.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.14.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.15.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.16.0/24 AS4766 KYONGGI UNIVERSTY 256
203.249.32.0/24 AS4766 CHUNGBUK PROVINCIAL UNIVERSITY OF SCIENCE & TECHNOLOGY 256
203.249.38.0/24 AS55611 KYUNGMIN 256
203.249.126.0/24 AS9318 GACHON University 256
203.249.127.0/24 AS9318 GACHON University 256
203.249.33.0/24 AS9318 GACHON University 256
203.249.47.0/24 AS10071 Anyang University 256
203.249.35.0/24 AS9867 Jeonju Technical College 256
203.249.34.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256
203.249.36.0/24 AS10073 KOREA NATIONAL OPEN UNIVERSITY 256

Hosted domains

There are 33 domain names hosted across 26 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

Pingable IPs

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

IP Address ASN Details
203.249.74.48 AS18330 HONGIK UNIVERSITY 1.97ms from Incheon, KR
203.249.65.81 AS18330 HONGIK UNIVERSITY 2.02ms from Incheon, KR
203.249.39.65 AS3786 LG DACOM Corporation 1.75ms from Incheon, KR
203.249.4.221 AS4766 Korea Telecom 2.49ms from Seoul, KR
203.249.112.114 AS4766 Korea Telecom 5.76ms from Seoul, KR
203.249.102.85 AS9978 The University of Seoul 2.88ms from Seoul, KR
203.249.105.71 AS9978 The University of Seoul 3.80ms from Seoul, KR
203.249.126.4 AS9318 SK Broadband Co Ltd 1.41ms from Incheon, KR
203.249.77.245 AS18330 HONGIK UNIVERSITY 1.15ms from Seoul, KR
203.249.33.182 AS9318 SK Broadband Co Ltd 2.42ms from Incheon, KR
203.249.95.250 AS9318 SK Broadband Co Ltd 4.28ms from Incheon, KR
203.249.101.74 AS9978 The University of Seoul 4.08ms from Incheon, KR
203.249.64.90 AS18330 HONGIK UNIVERSITY 1.42ms from Seoul, KR
203.249.122.8 AS3786 LG DACOM Corporation 1.76ms from Incheon, KR
203.249.111.171 AS9978 The University of Seoul 2.25ms from Incheon, KR
203.249.45.6 AS10073 Korea National Open University 22.43ms from Seoul, KR
203.249.22.45 AS4766 Korea Telecom 1.80ms from Seoul, KR
203.249.26.102 AS4766 Korea Telecom 2.06ms from Seoul, KR
203.249.67.222 AS18330 HONGIK UNIVERSITY 1.67ms from Seoul, KR
203.249.23.228 AS4766 Korea Telecom 1.92ms from Seoul, KR
203.249.19.142 AS4766 Korea Telecom 2.32ms from Seoul, KR
203.249.7.8 AS4766 Korea Telecom 2.28ms from Seoul, KR
203.249.110.72 AS9978 The University of Seoul 2.92ms from Seoul, KR
203.249.36.5 AS10073 Korea National Open University 1.52ms from Seoul, KR
203.249.2.201 AS4766 Korea Telecom 2.62ms 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
145.18.145.241 AS1124 Universiteit van Amsterdam 0.57ms from Amsterdam, NL
82.101.205.1 AS33915 Vodafone Libertel B.V. 1.33ms from Amsterdam, NL
80.57.41.1 AS33915 Vodafone Libertel B.V. 4.80ms from Amsterdam, NL
194.26.76.33 AS39146 MachCloud B.V. 0.66ms from Amsterdam, NL
145.223.205.1 AS44074 Cooperatie Royal FloraHolland U.A. 2.48ms from Amsterdam, NL
4.25.23.177 AS3356 Level 3 Parent, LLC 0.62ms from Ashburn, US
174.80.19.1 AS20115 Charter Communications LLC 11.95ms from Atlanta, US
111.33.115.225 AS38019 tianjin Mobile Communication Company Limited 4.75ms from Beijing, CN
35.165.223.241 AS16509 Amazon.com, Inc. 0.23ms from Boardman, US
200.119.83.97 AS19429 ETB - Colombia 0.67ms from Bogota, CO
73.69.96.1 AS7922 Comcast Cable Communications, LLC 6.92ms from Boston, US
194.78.6.81 AS5432 Proximus NV 1.99ms from Brussels, BE
134.161.98.1 AS22594 University of Northern Iowa 9.59ms from Chicago, US
98.17.8.1 AS7029 Windstream Communications LLC 8.23ms from Chicago, US
2.110.156.1 AS203953 Hiper A/S 4.12ms from Copenhagen, DK
4.182.144.49 AS8075 Microsoft Corporation 0.20ms from Frankfurt am Main, DE
221.182.199.97 AS9808 China Mobile Communications Group Co., Ltd. 17.33ms from Guangzhou, CN
101.64.118.1 AS4837 CHINA UNICOM China169 Backbone 7.57ms from Hangzhou, CN
113.23.119.129 AS18403 FPT Telecom Company 0.59ms from Hanoi, VN
112.212.84.1 AS9689 SK Broadband Co Ltd 1.33ms from Incheon, KR
103.39.133.129 AS133694 EMAX GLOBAL MEDIA PVT. LTD 0.07ms from Indore, IN
95.15.253.1 AS47331 TTNet A.S. 6.71ms from Istanbul, TR
78.163.227.1 AS9121 Turk Telekomunikasyon Anonim Sirketi 3.69ms from Istanbul, TR
139.194.220.1 AS23700 Linknet-Fastnet ASN 1.28ms from Jakarta, ID
175.139.4.1 AS4788 TM TECHNOLOGY SERVICES SDN. BHD. 6.95ms from Kuala Lumpur, MY

Traceroute

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

$
traceroute -a -n -q1 -m10 203.249.23.231
traceroute to 203.249.23.231 (203.249.23.231): 10 hops max, 52 byte packets
1 [AS15169] 74.125.37.114 117.741 ms
2 *
3 [AS4766] 112.174.84.97 141.798 ms
4 [AS4766] 112.174.49.26 148.412 ms
5 *
6 *
7 [AS4766] 222.98.203.190 145.936 ms
8 *
9 *
10 *
Measurement taken from IPinfo ProbeNet in Melbourne, AU
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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