221.157.104.0/21

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS4766
Parent Range	221.144.0.0/12
Registry	KRNIC
ID	221.157.104.0-221.157.104.255

WHOIS Details

inetnum:            221.157.104.0 - 221.157.104.255
descr:              Gyemyeongmunhwadaehakgyojang
network-type:       CUSTOMER
address:            Sindang-Dong Dalseo-Gu Daegugwangyeok-Si
zip-code:           704-200
created:            2015-03-17
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 221.157.104.0/21

Range	ASN	Company	Num of IPs
221.144.0.0/12	AS152214	Korea Telecom	1,048,576
221.144.0.0/12	AS152232	Korea Telecom	1,048,576
221.144.0.0/12	AS4766	Korea Telecom	1,048,576
221.144.0.0/12	AS9856	Korea Telecom	1,048,576

Nearby Ranges

BGP prefixes that overlap with 221.157.0.0/16

Range	ASN	Company	Num of IPs
221.144.0.0/12	AS152232	Korea Telecom	1,048,576
221.144.0.0/12	AS4766	Korea Telecom	1,048,576
221.144.0.0/12	AS9856	Korea Telecom	1,048,576
221.144.0.0/12	AS152214	Korea Telecom	1,048,576
221.157.116.0/24	AS4766	Gyemyeongmunhwadaehakgyojang	256
221.157.126.0/24	AS4766	Gyeongbukgwahakdaehakgyo	256
221.157.127.0/24	AS4766	Gyeongbukgwahakdaehakgyo	256

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

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
5.129.235.149	AS210976 Timeweb, LLP	`0.53ms` from Amsterdam, NL
134.147.194.133	AS29484 Ruhr-Universitaet Bochum	`4.77ms` from Amsterdam, NL
49.48.43.213	AS45758 Triple T Broadband Public Company Limited	`2.78ms` from Bangkok, TH
111.160.210.37	AS4837 CHINA UNICOM China169 Backbone	`5.73ms` from Beijing, CN
154.125.184.165	AS8346 SONATEL-AS Autonomous System	`2.43ms` from Dakar, SN
63.234.236.85	AS209 CenturyLink Communications, LLC	`0.67ms` from Denver, US
185.91.7.5	AS200931 Lumberg Connect GmbH	`2.97ms` from Duesseldorf, DE
168.93.208.149	AS834 IPXO LLC	`0.39ms` from Frankfurt am Main, DE
108.215.160.5	AS7018 AT&T Enterprises, LLC	`13.67ms` from Houston, US
210.113.115.165	AS4766 Korea Telecom	`1.29ms` from Incheon, KR
1.239.39.229	AS9318 SK Broadband Co Ltd	`0.92ms` from Incheon, KR
1.237.44.21	AS9318 SK Broadband Co Ltd	`1.71ms` from Incheon, KR
175.121.69.213	AS9318 SK Broadband Co Ltd	`1.54ms` from Incheon, KR
169.239.70.5	AS327960 PC Maniacs (Pty) Ltd	`0.14ms` from Johannesburg, ZA
193.38.224.133	AS206276 Citelia s.a.	`1.82ms` from Madrid, ES
36.24.187.21	AS4134 CHINANET-BACKBONE	`5.43ms` from Ningbo, CN
131.148.62.37	AS33363 Charter Communications, Inc	`5.05ms` from Orlando, US
3.174.61.5	AS16509 Amazon.com, Inc.	`0.31ms` from Rio de Janeiro, BR
64.47.189.133	AS19855 Masergy Communications, Inc.	`0.18ms` from Seattle, US
173.25.249.21	AS30036 Mediacom Communications Corp	`8.30ms` from Atlanta, US
34.140.156.213	AS396982 Google LLC	`0.15ms` from Brussels, BE
83.150.239.21	AS48095 XT GLOBAL NETWORKS LTD.	`7.73ms` from Bucharest, RO
187.85.158.133	AS53062 ALT \| GRUPO BRASIL TECPAR	`0.94ms` from Curitiba, BR
103.121.107.37	AS138150 Salim Khan & Milon Raihan	`0.35ms` from Dhaka, BD
79.239.106.229	AS3320 Deutsche Telekom AG	`4.96ms` from Duesseldorf, DE

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 221.157.106.184

traceroute to 221.157.106.184 (221.157.106.184): 13 hops max, 52 byte packets

4 [] 27.111.229.142 1.656 ms

5 [AS4766] 112.174.87.137 59.807 ms

6 [AS4766] 112.174.86.73 59.582 ms

7 [AS4766] 112.190.28.250 62.184 ms

8 *

9 *

10 [AS4766] 121.150.184.10 61.69 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Singapore, SG

On February 27th 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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