203.251.137.0/24

AS4766 · Korea Telecom

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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
203.251.137.133	fireout.kr	1
203.251.137.139	sejongjgb.co.kr	1

Hosted domains API

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Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
203.251.137.160	AS4766 Korea Telecom	`1.02ms` 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
76.129.27.8	AS7922 Comcast Cable Communications, LLC	`11.10ms` from Atlanta, US
114.254.119.248	AS4808 China Unicom Beijing Province Network	`3.90ms` from Beijing, CN
97.150.74.184	AS6167 Verizon Business	`14.89ms` from Dallas, US
104.41.203.72	AS8075 Microsoft Corporation	`0.24ms` from Dublin, IE
136.34.116.184	AS16591 Google Fiber Inc.	`0.57ms` from Kansas City, US
76.166.8.40	AS20001 Charter Communications Inc	`1.10ms` from Los Angeles, US
153.136.244.72	AS4713 NTT DOCOMO BUSINESS,Inc.	`12.31ms` from Osaka, JP
179.209.42.40	AS28573 Claro NXT Telecomunicacoes Ltda	`1.17ms` from Osasco, BR
70.15.83.72	AS3737 PenTeleData Inc.	`12.59ms` from Philadelphia, US
187.148.2.248	AS8151 UNINET	`8.37ms` from Santiago de Queretaro, MX
113.199.87.136	AS17608 ABN	`1.61ms` from Seoul, KR
149.156.237.8	AS8267 Academic Computer Centre CYFRONET AGH	`9.77ms` from Warsaw, PL
99.87.247.232	AS7018 AT&T Enterprises, LLC	`1.70ms` from Atlanta, US
86.121.191.152	AS8708 DIGI ROMANIA S.A.	`0.93ms` from Bucharest, RO
34.253.130.248	AS16509 Amazon.com, Inc.	`0.18ms` from Dublin, IE
31.41.34.104	AS210000 TwentyWAN Networks	`0.24ms` from Fremont, US
107.146.152.200	AS33363 Charter Communications, Inc	`11.28ms` from Murfreesboro, US
182.164.227.152	AS17511 OPTAGE Inc.	`2.62ms` from Osaka, JP
104.107.182.72	AS16625 Akamai Technologies, Inc.	`0.23ms` from Pittsburgh, US
128.95.234.8	AS73 University of Washington	`0.49ms` from Seattle, US
110.149.198.168	AS1221 Telstra Limited	`8.76ms` from Sydney, AU
116.179.201.24	AS4837 CHINA UNICOM China169 Backbone	`7.25ms` from Taiyuan, CN
126.11.75.168	AS17676 SoftBank Corp.	`4.28ms` from Tokyo, JP
20.122.194.104	AS8075 Microsoft Corporation	`0.32ms` from Boydton, US
36.251.195.248	AS4837 CHINA UNICOM China169 Backbone	`8.14ms` from Fuzhou, CN

Traceroute

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

traceroute -a -n -q1 203.251.137.217

traceroute to 203.251.137.217 (203.251.137.217): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.47 0.071 ms

2 [AS4766] 218.145.32.254 0.749 ms

3 *

4 *

5 *

6 *

7 [AS4766] 210.183.172.86 2.488 ms

8 [AS4766] 203.251.137.217 1.427 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On March 13th 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.

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