203.251.137.0/24

AS4766 · Korea Telecom

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	South Korea
Domain	kt.com
ASN	AS4766
Parent Range	203.251.128.0/18
Registry	KRNIC
ID	203.251.137.0-203.251.137.255

WHOIS Details

inetnum:            203.251.137.0 - 203.251.137.255
descr:              Korea Telecom
network-type:       CUSTOMER
address:            90 Buljeongro  Bundang-Gu Seongnam-Si Gyeonggi-Do
zip-code:           13606
created:            2019-12-05
admin:              GENERATED-KRNIC-IP-MANAGER-KORNETIP
country:            KR
source:             KRNIC

nic-hdl:            GENERATED-KRNIC-IP-MANAGER-KORNETIP
person:             IP Manager
name:               IP Manager
phone:              +82-2-500-6630
e-mail:             kornet_ip@kt.com
source:             KRNIC

Overlapping Ranges

BGP prefixes that contain 203.251.137.0/24

Range	ASN	Company	Num of IPs
203.251.128.0/18	AS4766	Korea Telecom	16,384

Nearby Ranges

BGP prefixes that overlap with 203.251.0.0/16

Range	ASN	Company	Num of IPs
203.251.0.0/17	AS4766	Korea Telecom	32,768
203.251.0.0/17	AS152232	Korea Telecom	32,768
203.251.192.0/18	AS9848	SEJONG NETWORKS	16,384
203.251.192.0/18	AS4670	SEJONG NETWORKS	16,384
203.251.128.0/18	AS4766	Korea Telecom	16,384
203.251.192.0/18	AS4664	SEJONG NETWORKS	16,384
203.251.205.0/24	AS4670	SEJONG NETWORKS	256
203.251.112.0/24	AS4766	Busanjangsindaehakgyo	256
203.251.135.0/24	AS4766	Korea Telecom	256
203.251.136.0/24	AS4766	Korea Telecom	256
203.251.7.0/24	AS4766	Hangukcheoldosiseolgongdan	256
203.251.207.0/24	AS7562	Hyundai Department	256
203.251.237.0/24	AS7562	Hyundai Department	256
203.251.246.0/24	AS9848	SEJONG NETWORKS	256
203.251.249.0/24	AS9848	SEJONG NETWORKS	256
203.251.250.0/24	AS9848	SEJONG NETWORKS	256
203.251.210.0/24	AS9980	Hyundai Information Technology Co. Ltd.	256
203.251.251.0/24	AS9980	Hyundai Information Technology Co. Ltd.	256
203.251.77.0/24	AS38124	Korea Telecom	256
203.251.152.0/24	AS45399	Hanjinjeongbotongsin(ju)	256
203.251.154.0/24	AS45399	Hanjinjeongbotongsin(ju)	256
203.251.201.0/24	AS4670	SEJONG NETWORKS	256
203.251.202.0/24	AS4670	SEJONG NETWORKS	256

Hosted domains

There are 5 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
203.251.137.208	syfem.org	3
203.251.137.139	sejongjgb.co.kr	1
203.251.137.133	fireout.kr	1

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

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

IP Address	ASN	Details
203.251.137.159	AS4766 Korea Telecom	`1.06ms` 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
150.136.133.136	AS31898 Oracle Corporation	`0.17ms` from Ashburn, US
186.39.5.120	AS22927 Telefonica de Argentina	`2.07ms` from Buenos Aires, AR
73.161.122.184	AS7922 Comcast Cable Communications, LLC	`9.34ms` from Flint, US
80.144.19.152	AS3320 Deutsche Telekom AG	`6.29ms` from Frankfurt am Main, DE
95.70.103.72	AS12389 PJSC Rostelecom	`0.97ms` from Khabarovsk, RU
190.238.42.120	AS6147 INTEGRATEL PERÚ S.A.A.	`1.61ms` from Lima, PE
77.226.205.232	AS12430 VODAFONE ESPANA S.A.U.	`1.03ms` from Madrid, ES
80.177.87.56	AS5378 Vodafone Limited	`4.32ms` from Manchester, GB
79.200.243.8	AS3320 Deutsche Telekom AG	`1.55ms` from Nuernberg, DE
54.39.93.104	AS16276 OVH SAS	`0.14ms` from Beauharnois, CA
20.10.77.88	AS8075 Microsoft Corporation	`0.23ms` from Boydton, US
97.154.183.136	AS6167 Verizon Business	`11.57ms` from Dallas, US
13.74.218.200	AS8075 Microsoft Corporation	`0.21ms` from Dublin, IE
87.169.23.216	AS3320 Deutsche Telekom AG	`2.55ms` from Duesseldorf, DE
90.194.179.232	AS5607 Sky UK Limited	`5.76ms` from Erith, GB
113.184.21.72	AS45899 VNPT Corp	`3.55ms` from Hanoi, VN
106.40.90.104	AS4134 CHINANET-BACKBONE	`1.37ms` from Hohhot, CN
59.3.184.24	AS4766 Korea Telecom	`6.59ms` from Incheon, KR
51.198.255.56	AS5607 Sky UK Limited	`5.04ms` from London, GB
23.224.169.184	AS40065 CNSERVERS LLC	`0.22ms` from Los Angeles, US
89.241.90.40	AS13285 TalkTalk Communications Limited	`2.94ms` from Manchester, GB
210.90.140.40	AS4766 Korea Telecom	`1.32ms` from Seoul, KR
78.133.40.104	AS15735 GO p.l.c.	`2.44ms` from Swieqi, MT
126.235.153.136	AS17676 SoftBank Corp.	`2.99ms` from Tokyo, JP
116.64.31.184	AS9824 JCOM Co., Ltd.	`12.16ms` 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 203.251.137.151

traceroute to 203.251.137.151 (203.251.137.151): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.46 0.077 ms

2 [AS4766] 218.145.32.254 1.269 ms

3 *

4 *

5 *

6 *

7 [AS4766] 210.183.172.86 2.269 ms

8 [AS4766] 203.251.137.151 1.24 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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales