203.249.96.0/20

AS9978 · The University of Seoul

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Summary

Country	South Korea
Domain	kren.kr
ASN	AS9978
Registry	APNIC
ID	KREN

WHOIS Details

inetnum:        203.249.96.0 - 203.249.127.255
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:  2017-02-02T04:55:32Z
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:        203.249.96.0 - 203.249.127.255
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

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 3 domain names hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.249.96.80	xn--9d0bw1iba110et0j2scu0jwfy10kca.xn--3e0b707e	3

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

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

IP Address	ASN	Details
203.249.99.81	AS9978 The University of Seoul	`3.23ms` from Incheon, KR
203.249.101.74	AS9978 The University of Seoul	`4.02ms` from Seoul, KR
203.249.103.60	AS9978 The University of Seoul	`2.85ms` from Incheon, KR
203.249.111.136	AS9978 The University of Seoul	`2.05ms` from Incheon, KR
203.249.98.79	AS9978 The University of Seoul	`4.32ms` from Incheon, KR
203.249.96.154	AS9978 The University of Seoul	`1.94ms` from Seoul, KR
203.249.104.21	AS9978 The University of Seoul	`4.14ms` from Seoul, KR
203.249.102.17	AS9978 The University of Seoul	`3.52ms` from Incheon, KR
203.249.107.74	AS9978 The University of Seoul	`3.54ms` from Seoul, KR
203.249.105.71	AS9978 The University of Seoul	`3.55ms` from Incheon, KR
203.249.110.72	AS9978 The University of Seoul	`3.29ms` from Seoul, KR
203.249.106.95	AS9978 The University of Seoul	`4.04ms` from Seoul, KR
203.249.97.41	AS9978 The University of Seoul	`3.83ms` from Incheon, KR
203.249.109.37	AS9978 The University of Seoul	`2.85ms` from Incheon, 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
212.83.189.244	AS12876 SCALEWAY S.A.S.	`0.29ms` from Amsterdam, NL
69.20.36.68	AS27357 Rackspace Hosting	`0.33ms` from Ashburn, US
152.188.40.68	AS701 Verizon Business	`0.70ms` from Atlanta, US
176.108.39.20	AS31042 Serbia BroadBand-Srpske Kablovske mreze d.o.o.	`8.12ms` from Belgrade, RS
56.136.120.196	AS8987 Amazon Data Services Ireland Ltd	`0.75ms` from Boardman, US
34.77.180.212	AS396982 Google LLC	`0.15ms` from Brussels, BE
104.13.216.180	AS7018 AT&T Enterprises, LLC	`8.07ms` from Chicago, US
152.163.73.20	AS394380 Leaseweb USA, Inc.	`0.28ms` from Dallas, US
107.2.135.164	AS7922 Comcast Cable Communications, LLC	`1.97ms` from Denver, US
24.130.215.4	AS7922 Comcast Cable Communications, LLC	`2.04ms` from Fremont, US
18.170.222.68	AS16509 Amazon.com, Inc.	`0.18ms` from London, GB
109.176.144.164	AS8851 GCI Network Solutions Limited	`6.79ms` from London, GB
83.37.172.116	AS3352 TELEFONICA DE ESPANA S.A.U.	`12.47ms` from Madrid, ES
5.49.2.52	AS5410 Bouygues Telecom SA	`2.52ms` from Paris, FR
218.233.19.68	AS9318 SK Broadband Co Ltd	`5.53ms` from Seoul, KR
8.216.134.100	AS45102 Alibaba (US) Technology Co., Ltd.	`0.73ms` from Singapore, SG
124.10.225.164	AS9924 Taiwan Fixed Network, Telco and Network Service Provider.	`13.75ms` from Taipei, TW
1.71.147.4	AS132147 CT-SHANXI-MAN	`0.54ms` from Taiyuan, CN
153.210.122.68	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.94ms` from Tokyo, JP
72.15.255.36	AS13649 Flexential Colorado Corp.	`9.91ms` from Ashburn, US
181.50.58.164	AS10620 Telmex Colombia S.A.	`6.33ms` from Bogota, CO
3.21.0.4	AS16509 Amazon.com, Inc.	`0.18ms` from Columbus, US
75.217.138.68	AS6167 Verizon Business	`19.90ms` from Dallas, US
86.191.234.52	AS2856 British Telecommunications PLC	`4.01ms` from Erith, GB
189.177.94.148	AS8151 UNINET	`0.92ms` from Guadalajara, MX

Traceroute

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

traceroute -a -n -q1 203.249.111.79

traceroute to 203.249.111.79 (203.249.111.79): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.44 0.117 ms

2 [AS4766] 218.145.32.254 0.801 ms

3 *

4 *

5 [AS4766] 112.174.70.74 2.275 ms

6 *

7 [AS4766] 121.161.202.34 2.546 ms

8 [AS4766] 210.125.184.50 1.38 ms

9 *

10 [AS4766] 210.125.184.226 4.118 ms

11 [AS4766] 210.125.184.234 6.19 ms

12 *

13 *

14 *

15 [AS9978] 203.249.111.79 8.313 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 19th 2026

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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