203.243.128.0/17

AS9848 · SEJONG NETWORKS

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Summary

Country	South Korea
Domain	sejongnetworks.com
ASN	AS9848
Registry	APNIC
ID	SHINBIRO

WHOIS Details

inetnum:        203.243.128.0 - 203.243.255.255
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:  2024-09-10T08:50:06Z
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 are contained by 203.243.128.0/17

Range	ASN	Company	Num of IPs
203.243.221.0/24	AS23584	HCN-Pusan	256
203.243.237.0/24	AS18300	Korea Electric Power Corporation	256
203.243.156.0/24	AS23584	HCN-Pusan	256
203.243.220.0/24	AS23584	HCN-Pusan	256
203.243.148.0/22	AS23584	HCN-Pusan	1,024
203.243.152.0/22	AS23584	HCN-Pusan	1,024
203.243.140.0/22	AS23584	HCN-Pusan	1,024

Nearby Ranges

BGP prefixes that overlap with 203.243.0.0/16

Range	ASN	Company	Num of IPs
203.243.140.0/22	AS23584	HCN-Pusan	1,024
203.243.148.0/22	AS23584	HCN-Pusan	1,024
203.243.152.0/22	AS23584	HCN-Pusan	1,024
203.243.156.0/24	AS23584	HCN-Pusan	256
203.243.220.0/24	AS23584	HCN-Pusan	256
203.243.221.0/24	AS23584	HCN-Pusan	256
203.243.237.0/24	AS18300	Korea Electric Power Corporation	256
203.243.39.0/24	AS4766	Korea Telecom	256

Hosted domains

There are 4 domain names hosted across 3 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
203.243.174.93	certinfo.kr	2

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

1,672 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.243.237.96	AS18300 KEPCO	`5.82ms` from Seoul, KR
203.243.158.36	AS9848 SEJONG NETWORKS	`6.61ms` from Seoul, KR
203.243.155.1	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.14ms` from Seoul, KR
203.243.224.60	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.06ms` from Seoul, KR
203.243.156.1	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.26ms` from Seoul, KR
203.243.219.20	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.38ms` from Seoul, KR
203.243.151.1	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.11ms` from Seoul, KR
203.243.150.1	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.00ms` from Seoul, KR
203.243.221.1	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.21ms` from Seoul, KR
203.243.143.1	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.17ms` from Seoul, KR
203.243.227.109	AS9848 SEJONG NETWORKS	`2.64ms` from Seoul, KR
203.243.141.151	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`6.93ms` from Seoul, KR
203.243.129.77	AS9848 SEJONG NETWORKS	`35.37ms` from Seoul, KR
203.243.175.232	AS9848 SEJONG NETWORKS	`1.23ms` from Seoul, KR
203.243.174.52	AS9848 SEJONG NETWORKS	`1.48ms` from Seoul, KR
203.243.130.18	AS9848 SEJONG NETWORKS	`0.49ms` from Seoul, KR
203.243.131.2	AS9848 SEJONG NETWORKS	`0.53ms` from Seoul, KR
203.243.225.171	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`6.99ms` from Seoul, KR
203.243.140.209	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.11ms` from Seoul, KR
203.243.142.38	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.35ms` from Seoul, KR
203.243.134.18	AS9848 SEJONG NETWORKS	`0.47ms` from Seoul, KR
203.243.217.162	AS23584 PUSAN CABLE TV SYSTEM CO., LTD.	`7.01ms` 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
213.34.108.1	AS33915 Vodafone Libertel B.V.	`4.76ms` from Amsterdam, NL
71.126.168.1	AS701 Verizon Business	`1.66ms` from Ashburn, US
124.193.193.241	AS4847 China Networks Inter-Exchange	`6.23ms` from Beijing, CN
117.206.32.1	AS9829 National Internet Backbone	`13.09ms` from Bengaluru, IN
98.216.156.1	AS7922 Comcast Cable Communications, LLC	`2.80ms` from Boston, US
188.250.87.1	AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`1.86ms` from Braga, PT
2.83.35.1	AS3243 MEO - SERVICOS DE COMUNICACOES E MULTIMEDIA S.A.	`3.49ms` from Braga, PT
46.139.240.1	AS5483 Magyar Telekom Plc.	`7.75ms` from Budapest, HU
110.7.40.129	AS4837 CHINA UNICOM China169 Backbone	`4.32ms` from Changchun, CN
222.215.198.1	AS4134 CHINANET-BACKBONE	`5.55ms` from Chengdu, CN
171.217.147.1	AS4134 CHINANET-BACKBONE	`2.46ms` from Chengdu, CN
71.82.182.1	AS20115 Charter Communications LLC	`7.72ms` from Chicago, US
75.129.68.129	AS20115 Charter Communications LLC	`7.44ms` from Chicago, US
198.135.182.161	AS46437 Fourway Computer Products, Inc.	`2.24ms` from Chicago, US
205.178.32.1	AS6079 RCN	`0.55ms` from Chicago, US
12.26.165.113	AS7018 AT&T Enterprises, LLC	`9.43ms` from Dallas, US
86.41.138.1	AS5466 Eircom Limited	`0.97ms` from Dublin, IE
193.188.154.1	AS8405 PE Sontheimer Bernd	`3.44ms` from Frankfurt am Main, DE
175.43.47.1	AS4837 CHINA UNICOM China169 Backbone	`5.81ms` from Fuzhou, CN
112.114.14.1	AS4134 CHINANET-BACKBONE	`13.10ms` from Guiyang, CN
112.147.120.177	AS17858 LG POWERCOMM	`1.97ms` from Incheon, KR
114.205.138.49	AS9318 SK Broadband Co Ltd	`1.94ms` from Incheon, KR
85.97.88.1	AS9121 Turk Telekomunikasyon Anonim Sirketi	`7.36ms` from Izmir, TR
196.214.93.33	AS3741 Dimension Data	`2.36ms` from Johannesburg, ZA
217.175.71.33	AS15641 Arqiva Communications Ltd	`1.79ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -f4 -m7 203.243.161.3

traceroute to 203.243.161.3 (203.243.161.3): 7 hops max, 52 byte packets

4 [AS9848] 203.231.88.65 1.009 ms

5 *

6 *

7 *

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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