211.253.121.0/24

AS17841 · NATIONAL INFORMATION RESOURCES SERVICE

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Summary

Country	South Korea
Domain	kt.com
ASN	AS17841
Registry	KRNIC
ID	KORNET-KR

WHOIS Details

inetnum:        211.253.120.0 - 211.253.127.255
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:        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

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

Nearby Ranges

BGP prefixes that overlap with 211.253.0.0/16

Range	ASN	Company	Num of IPs
211.253.176.0/20	AS10176	Korea Telecom	4,096
211.253.72.0/21	AS9531	Korea Telecom	2,048
211.253.68.0/22	AS9531	Gwangjugwangyeoksigyoyukcheong	1,024
211.253.61.0/24	AS17574	KT	256
211.253.61.0/24	AS17574	KT	256
211.253.60.0/24	AS17841	KT	256
211.253.60.0/24	AS17841	KT	256
211.253.61.0/24	AS17841	KT	256
211.253.61.0/24	AS17841	KT	256
211.253.62.0/24	AS17841	Korea Telecom	256
211.253.65.0/24	AS45400	Korea Telecom	256
211.253.67.0/24	AS45400	Korea Telecom	256
211.253.56.0/24	AS4766	Korea Telecom	256
211.253.59.0/24	AS4766	Baekseokyesuldaehakgyo	256
211.253.60.0/24	AS17574	KT	256
211.253.60.0/24	AS17574	KT	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

Read more

Pingable IPs

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

IP Address	ASN	Details
211.253.121.4	AS17841 NATIONAL INFORMATION RESOURCES SERVICE	`6.78ms` 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
104.1.149.40	AS7018 AT&T Enterprises, LLC	`2.85ms` from Atlanta, US
125.25.249.40	AS23969 TOT Public Company Limited	`7.57ms` from Bangkok, TH
110.248.185.136	AS4837 CHINA UNICOM China169 Backbone	`9.15ms` from Beijing, CN
116.2.101.200	AS4837 CHINA UNICOM China169 Backbone	`15.50ms` from Harbin, CN
5.79.2.248	AS15395 Rackspace Ltd.	`1.40ms` from London, GB
77.89.140.8	AS39545 Fluidone Ltd.	`0.58ms` from London, GB
159.93.124.248	AS2875 Joint Institute for Nuclear Research	`3.35ms` from Moscow, RU
115.111.194.184	AS4755 TATA Communications formerly VSNL is Leading ISP	`9.96ms` from Mumbai, IN
122.96.243.168	AS4837 CHINA UNICOM China169 Backbone	`8.77ms` from Nanjing, CN
176.165.41.232	AS5410 Bouygues Telecom SA	`3.02ms` from Paris, FR
42.147.106.184	AS9824 JCOM Co., Ltd.	`4.96ms` from Tokyo, JP
108.206.17.88	AS7018 AT&T Enterprises, LLC	`7.57ms` from Atlanta, US
35.238.93.248	AS396982 Google LLC	`0.10ms` from Council Bluffs, US
169.55.196.24	AS36351 IBM Cloud	`2.16ms` from Dallas, US
54.78.49.168	AS16509 Amazon.com, Inc.	`0.16ms` from Dublin, IE
27.75.133.104	AS7552 Viettel Group	`0.92ms` from Ho Chi Minh City, VN
75.157.171.56	AS852 TELUS Communications Inc.	`16.62ms` from Kelowna, CA
178.54.237.120	AS48437 PP "Merezha"	`1.63ms` from Kyiv, UA
223.84.78.24	AS56045 China Mobile communications corporation	`2.38ms` from Nanchang, CN
24.17.26.232	AS7922 Comcast Cable Communications, LLC	`6.12ms` from Seattle, US
121.142.97.104	AS4766 Korea Telecom	`1.23ms` from Seoul, KR
121.125.152.136	AS9318 SK Broadband Co Ltd	`2.01ms` from Seoul, KR
211.213.87.168	AS9318 SK Broadband Co Ltd	`7.70ms` from Seoul, KR
183.184.254.8	AS4837 CHINA UNICOM China169 Backbone	`2.73ms` from Taiyuan, CN
188.123.221.72	AS35434 PirxNet Grzegorz Bialas	`4.10ms` from Wrocław, PL

Traceroute

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

traceroute -a -n -q1 211.253.121.33

traceroute to 211.253.121.33 (211.253.121.33): 64 hops max, 52 byte packets

1 [AS15169] 172.253.64.138 1.101 ms

2 [AS9286] 121.78.63.69 1.286 ms

3 [AS9957] 203.246.169.174 1.86 ms

4 [] 139.150.100.124 3.96 ms

5 *

6 *

7 *

8 *

9 [AS17841] 211.253.121.33 8.465 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On December 20th 2025

What are IP address ranges?

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