211.52.21.0/24

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS4766
Parent Range	211.52.0.0/18
Registry	KRNIC
ID	KORNET-KR

WHOIS Details

inetnum:        211.52.0.0 - 211.52.63.255
netname:        KORNET-KR
descr:          Korea Telecom
country:        KR
admin-c:        IA9-KR
tech-c:         IM9-KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
changed:        hostmaster@nic.or.kr 20240912
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC


person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        KT Head Office
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IA9-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20240912
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        KT Head Office
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IM9-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20240912
remarks:        This information has been partially mirrored by APNIC from
remarks:        KRNIC. To obtain more specific information, please use the
remarks:        KRNIC whois server at whois.kisa.or.kr.
source:         KRNIC

Overlapping Ranges

BGP prefixes that contain 211.52.21.0/24

Range	ASN	Company	Num of IPs
211.52.0.0/18	AS4766	Korea Telecom	16,384

Nearby Ranges

BGP prefixes that overlap with 211.52.0.0/16

Range	ASN	Company	Num of IPs
211.52.64.0/18	AS4663	ELIMNET, INC.	16,384
211.52.0.0/18	AS4766	Korea Telecom	16,384
211.52.160.0/19	AS9318	SK Broadband Co Ltd	8,192
211.52.128.0/20	AS9318	SK Broadband Co Ltd	4,096
211.52.144.0/20	AS9318	SK Broadband Co Ltd	4,096
211.52.243.0/24	AS38695	Bucheon university	256

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

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

IP Address	ASN	Details
211.52.21.100	AS4766 Korea Telecom	`1.63ms` 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
182.53.191.232	AS23969 TOT Public Company Limited	`7.40ms` from Bangkok, TH
41.32.167.88	AS8452 TE-AS	`5.26ms` from Cairo, EG
72.32.74.200	AS33070 Rackspace Hosting	`1.09ms` from Dallas, US
3.67.12.216	AS16509 Amazon.com, Inc.	`0.13ms` from Frankfurt am Main, DE
185.76.234.248	AS201193 Internet Projects JSC	`5.64ms` from Helsinki, FI
89.242.171.136	AS13285 TalkTalk Communications Limited	`2.78ms` from Manchester, GB
154.123.131.120	AS12455 Kenyan Post & Telecommunications Company / Telkom Kenya Ltd	`13.04ms` from Nairobi, KE
60.145.0.168	AS17676 SoftBank Corp.	`3.69ms` from Osaka, JP
112.185.52.184	AS4766 Korea Telecom	`6.12ms` from Seoul, KR
8.220.0.200	AS45102 Alibaba (US) Technology Co., Ltd.	`0.75ms` from Singapore, SG
36.225.79.248	AS3462 Data Communication Business Group	`1.20ms` from Taipei, TW
111.250.42.120	AS3462 Data Communication Business Group	`0.92ms` from Taipei, TW
24.141.125.88	AS7992 Cogeco Connexion Inc.	`7.71ms` from Toronto, CA
50.85.212.216	AS8075 Microsoft Corporation	`0.26ms` from Amsterdam, NL
123.120.15.120	AS4808 China Unicom Beijing Province Network	`3.53ms` from Beijing, CN
184.166.230.248	AS33588 Charter Communications LLC	`8.14ms` from Denver, US
84.129.21.184	AS3320 Deutsche Telekom AG	`6.30ms` from Frankfurt am Main, DE
149.102.101.136	AS133613 MTel telecommunication company ltd.	`2.77ms` from Hong Kong, HK
81.103.199.200	AS5089 Virgin Media Limited	`11.16ms` from London, GB
87.221.17.248	AS12479 Orange Espagne SA	`11.37ms` from Madrid, ES
18.230.49.136	AS16509 Amazon.com, Inc.	`0.14ms` from Osasco, BR
45.186.161.216	AS269500 LAGARES TECNOLOGIA E COMUNICAÇÃO LTDA	`12.06ms` from Osasco, BR
73.164.160.216	AS7922 Comcast Cable Communications, LLC	`7.70ms` from Portland, US
34.144.130.40	AS396982 Google LLC	`0.10ms` from Sao Paulo, BR
96.164.20.88	AS393232 Comcast Cable Communications, LLC	`0.32ms` from Secaucus, US

Traceroute

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

traceroute -a -n -q1 211.52.21.129

traceroute to 211.52.21.129 (211.52.21.129): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.63 0.065 ms

2 *

3 *

4 *

5 [AS4766] 112.174.116.214 1.447 ms

6 *

7 *

8 *

9 [AS4766] 211.52.21.129 2.575 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On December 29th 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.

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