203.231.36.0/23

AS17837 · NHN KCP Corp.

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Summary

Country	South Korea
Domain	sejongnetworks.com
ASN	AS17837
Parent Range	203.231.0.0/16
Registry	APNIC
ID	SHINBIRO

WHOIS Details

inetnum:        203.231.0.0 - 203.231.255.255
netname:        SEJONG
descr:          SEJONG NETWORKS
country:        KR
admin-c:        IM686-AP
tech-c:         IM686-AP
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2024-09-10T08:50:05Z
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:        12 Gwacheon-daero 7-gil, Gwacheon-si, Gyeonggi-do
country:        KR
phone:          +82-2-1688-2200
e-mail:         ip@sejongnetworks.com
nic-hdl:        IM686-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2024-09-10T08:42:02Z
source:         APNIC

Overlapping Ranges

BGP prefixes that contain 203.231.36.0/23

Range	ASN	Company	Num of IPs
203.231.0.0/16	AS9973	SEJONG NETWORKS	65,536
203.231.0.0/16	AS17837	SEJONG NETWORKS	65,536
203.231.0.0/16	AS17881	SEJONG NETWORKS	65,536
203.231.0.0/16	AS18300	SEJONG NETWORKS	65,536
203.231.0.0/16	AS18305	SEJONG NETWORKS	65,536
203.231.0.0/16	AS18309	SEJONG NETWORKS	65,536
203.231.0.0/16	AS23593	SEJONG NETWORKS	65,536
203.231.0.0/16	AS3608	SEJONG NETWORKS	65,536
203.231.0.0/16	AS38676	SEJONG NETWORKS	65,536
203.231.0.0/16	AS9684	SEJONG NETWORKS	65,536
203.231.0.0/16	AS9848	SEJONG NETWORKS	65,536
203.231.0.0/16	AS131866	SEJONG NETWORKS	65,536

Nearby Ranges

BGP prefixes that overlap with 203.231.0.0/16

Range	ASN	Company	Num of IPs
203.231.0.0/16	AS131866	SEJONG NETWORKS	65,536
203.231.0.0/16	AS17837	SEJONG NETWORKS	65,536
203.231.0.0/16	AS17881	SEJONG NETWORKS	65,536
203.231.0.0/16	AS18300	SEJONG NETWORKS	65,536
203.231.0.0/16	AS18305	SEJONG NETWORKS	65,536
203.231.0.0/16	AS18309	SEJONG NETWORKS	65,536
203.231.0.0/16	AS23593	SEJONG NETWORKS	65,536
203.231.0.0/16	AS3608	SEJONG NETWORKS	65,536
203.231.0.0/16	AS38676	SEJONG NETWORKS	65,536
203.231.0.0/16	AS9684	SEJONG NETWORKS	65,536
203.231.0.0/16	AS9848	SEJONG NETWORKS	65,536
203.231.0.0/16	AS9973	SEJONG NETWORKS	65,536

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
203.231.36.160	AS17837 NHN KCP Corp.	`1.93ms` 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
154.29.43.87	AS46261 QuickPacket, LLC	`0.22ms` from Ashburn, US
54.189.144.71	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
216.188.247.247	AS7459 Grande Communications Networks, LLC	`5.26ms` from Dallas, US
31.57.14.71	AS22427 GNET INC.	`0.41ms` from Frankfurt am Main, DE
193.124.131.215	AS48347 JSC Mediasoft ekspert	`0.95ms` from Moscow, RU
130.190.246.7	AS1942 Renater	`8.12ms` from Paris, FR
34.8.12.199	AS396982 Google LLC	`0.09ms` from Rio de Janeiro, BR
101.44.197.71	AS136907 HUAWEI CLOUDS	`0.66ms` from Sao Paulo, BR
160.238.42.23	AS18647 Accel Net, Inc.	`0.22ms` from Seattle, US
112.181.49.151	AS4766 Korea Telecom	`5.85ms` from Seoul, KR
119.219.163.87	AS4766 Korea Telecom	`6.52ms` from Seoul, KR
180.67.51.55	AS9318 SK Broadband Co Ltd	`6.20ms` from Seoul, KR
121.236.247.39	AS140292 CHINATELECOM Jiangsu province Suzhou 5G network	`6.30ms` from Shanghai, CN
60.65.39.119	AS17676 SoftBank Corp.	`2.72ms` from Tokyo, JP
111.62.190.55	AS24547 Hebei Mobile Communication Company Limited	`0.57ms` from Zhangjiakou, CN
66.31.175.231	AS7922 Comcast Cable Communications, LLC	`8.93ms` from Boston, US
87.197.173.231	AS6855 Slovak Telekom, a.s.	`1.26ms` from Bratislava, SK
74.125.66.23	AS396982 Google LLC	`0.21ms` from Chang-hua, TW
109.56.63.215	AS44034 Hi3G Access AB	`5.48ms` from Copenhagen, DK
97.155.175.71	AS6167 Verizon Business	`19.74ms` from Dallas, US
87.106.188.167	AS8560 IONOS SE	`4.05ms` from London, GB
142.163.22.231	AS577 Bell Canada	`11.66ms` from Montreal, CA
45.12.124.7	AS208981 Data Center LLC	`5.82ms` from Moscow, RU
121.87.31.199	AS17511 OPTAGE Inc.	`1.77ms` from Osaka, JP
13.75.249.151	AS8075 Microsoft Corporation	`0.69ms` from Sydney, AU

Traceroute

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

traceroute -a -n -q1 -f4 -m13 203.231.36.51

traceroute to 203.231.36.51 (203.231.36.51): 13 hops max, 52 byte packets

4 [AS27729] 138.97.141.197 2.696 ms

5 *

6 *

7 *

8 *

9 [AS12956] 94.142.98.61 28.785 ms

10 [AS12956] 94.142.118.184 29.74 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in San Salvador, SV

On November 22nd 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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