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:             [email protected]
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	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	AS152214	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
221.157.116.0/24	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
98.19.110.21	AS7029 Windstream Communications LLC	`5.25ms` from Atlanta, US
75.117.45.101	AS7029 Windstream Communications LLC	`12.28ms` from Dallas, US
209.151.64.69	AS29863 Latisys-Denver, LLC	`1.11ms` from Denver, US
18.156.222.197	AS16509 Amazon.com, Inc.	`1.50ms` from Frankfurt am Main, DE
218.75.86.229	AS4134 CHINANET-BACKBONE	`7.04ms` from Hangzhou, CN
167.57.234.5	AS6057 Administracion Nacional de Telecomunicaciones	`1.68ms` from Montevideo, UY
184.144.217.53	AS577 Bell Canada	`1.70ms` from Montreal, CA
219.124.14.181	AS10001 Mics Network Corporation	`4.64ms` from Osaka, JP
15.188.162.53	AS16509 Amazon.com, Inc.	`0.13ms` from Paris, FR
128.79.115.101	AS5410 Bouygues Telecom SA	`13.01ms` from Paris, FR
66.55.155.117	AS20473 The Constant Company, LLC	`0.14ms` from Piscataway, US
65.129.106.213	AS209 CenturyLink Communications, LLC	`11.27ms` from Seattle, US
175.211.232.245	AS4766 Korea Telecom	`1.55ms` from Seoul, KR
219.240.84.85	AS9318 SK Broadband Co Ltd	`2.24ms` from Seoul, KR
34.126.147.21	AS396982 Google LLC	`0.13ms` from Singapore, SG
180.247.251.5	AS7713 PT Telekomunikasi Indonesia	`1.65ms` from Surabaya, ID
126.47.160.165	AS17676 SoftBank Corp.	`6.33ms` from Tokyo, JP
34.130.177.197	AS396982 Google LLC	`0.09ms` from Toronto, CA
13.94.141.245	AS8075 Microsoft Corporation	`0.24ms` from Amsterdam, NL
116.132.245.5	AS4837 CHINA UNICOM China169 Backbone	`6.51ms` from Beijing, CN
156.56.175.21	AS87 Indiana University	`5.19ms` from Chicago, US
40.143.40.5	AS17378 TierPoint, LLC	`1.65ms` from Durham, US
62.228.198.245	AS6866 Cyprus Telecommunications Authority	`2.59ms` from Larnaca, CY
82.223.55.213	AS8560 IONOS SE	`0.40ms` from Logrono, ES
109.181.7.181	AS2856 British Telecommunications PLC	`5.04ms` 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 -m10 221.157.107.31

traceroute to 221.157.107.31 (221.157.107.31): 10 hops max, 52 byte packets

1 [AS15169] 74.125.37.114 154.587 ms

2 *

3 [AS4766] 112.174.84.109 198.028 ms

4 [AS4766] 112.174.8.5 202.017 ms

5 *

6 *

7 [AS4766] 121.150.184.10 195.119 ms

8 *

9 *

10 *

Measurement taken from

IPinfo ProbeNet in Moncks Corner, US

On November 28th 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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