203.243.128.0/21

AS9848 · SEJONG NETWORKS

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Summary

Country	South Korea
Domain	sejongnetworks.com
ASN	AS9848
Parent Range	203.243.128.0/17
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 contain 203.243.128.0/21

Range	ASN	Company	Num of IPs
203.243.128.0/17	AS18300	SEJONG NETWORKS	32,768
203.243.128.0/17	AS23584	SEJONG NETWORKS	32,768
203.243.128.0/17	AS9848	SEJONG NETWORKS	32,768

Hosted domains

There are no domains currently hosted on this ASN.

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

1,774 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
203.243.129.235	AS9848 SEJONG NETWORKS	`0.90ms` from Seoul, KR
203.243.130.52	AS9848 SEJONG NETWORKS	`0.97ms` from Seoul, KR
203.243.131.33	AS9848 SEJONG NETWORKS	`0.96ms` from Seoul, KR
203.243.133.83	AS9848 SEJONG NETWORKS	`0.89ms` from Seoul, KR
203.243.134.48	AS9848 SEJONG NETWORKS	`0.92ms` from Seoul, KR
203.243.128.170	AS9848 SEJONG NETWORKS	`0.91ms` from Seoul, KR
203.243.132.182	AS9848 SEJONG NETWORKS	`0.98ms` 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
85.198.91.101	AS57008 ITGLOBAL.COM KZ LLP	`1.40ms` from Almaty, KZ
97.128.251.69	AS6167 Verizon Business	`19.49ms` from Ashburn, US
117.131.247.165	AS38019 tianjin Mobile Communication Company Limited	`4.05ms` from Beijing, CN
72.85.167.21	AS701 Verizon Business	`1.70ms` from Boston, US
96.67.75.37	AS7922 Comcast Cable Communications, LLC	`10.57ms` from Dallas, US
46.101.124.69	AS14061 DigitalOcean, LLC	`0.27ms` from Frankfurt am Main, DE
162.200.104.69	AS7018 AT&T Enterprises, LLC	`19.38ms` from Fremont, US
118.70.15.37	AS18403 FPT Telecom Company	`0.71ms` from Hanoi, VN
58.18.57.117	AS4837 CHINA UNICOM China169 Backbone	`8.42ms` from Hohhot, CN
154.93.104.149	AS138915 Kaopu Cloud HK Limited	`2.18ms` from Hong Kong, HK
206.85.218.21	AS33647 Yadkin Valley Telephone	`5.82ms` from Lenoir, US
113.228.59.165	AS4837 CHINA UNICOM China169 Backbone	`4.61ms` from Liaoyang, CN
52.56.186.21	AS16509 Amazon.com, Inc.	`0.17ms` from London, GB
45.43.234.213	AS26658 HT	`0.23ms` from Los Angeles, US
173.84.154.69	AS5650 Frontier Communications of America, Inc.	`13.87ms` from Los Angeles, US
83.237.46.149	AS8359 MTS PJSC	`1.79ms` from Moscow, RU
90.49.242.229	AS3215 Orange S.A.	`9.89ms` from Paris, FR
146.103.35.181	AS212238 Datacamp Limited	`0.58ms` from Prague, CZ
123.130.22.5	AS4837 CHINA UNICOM China169 Backbone	`8.72ms` from Qingdao, CN
34.202.231.133	AS14618 Amazon.com, Inc.	`0.41ms` from Reston, US
209.213.178.5	AS28086 Worldcom de Costa Rica, S.A.	`0.98ms` from San Jose, CR
24.109.180.197	AS6327 Shaw Communications Inc.	`3.82ms` from Seattle, US
68.82.32.53	AS7922 Comcast Cable Communications, LLC	`7.66ms` from Secaucus, US
211.199.72.213	AS4766 Korea Telecom	`4.59ms` from Seoul, KR
114.180.53.213	AS4713 NTT Communications Corporation	`4.55ms` from Tokyo, JP

Traceroute

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

traceroute -a -n -q1 203.243.132.1

traceroute to 203.243.132.1 (203.243.132.1): 64 hops max, 52 byte packets

1 [AS15169] 172.253.64.138 1.2 ms

2 [] 139.150.100.196 2.344 ms

3 [AS9848] 203.243.132.1 26.296 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On September 4th 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.

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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