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:        [email protected] 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:         [email protected]
nic-hdl:        IA9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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:         [email protected]
nic-hdl:        IM9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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

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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	`7.11ms` 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
84.35.251.24	AS21221 Infopact Netwerkdiensten B.V.	`17.29ms` from Amsterdam, NL
212.190.205.72	AS702 Verizon Business	`8.19ms` from Amsterdam, NL
34.220.81.184	AS16509 Amazon.com, Inc.	`0.52ms` from Boardman, US
109.138.92.120	AS5432 Proximus NV	`2.04ms` from Brussels, BE
162.151.231.120	AS7922 Comcast Cable Communications, LLC	`1.15ms` from Denver, US
35.158.66.40	AS16509 Amazon.com, Inc.	`0.13ms` from Frankfurt am Main, DE
83.40.249.72	AS3352 TELEFONICA DE ESPANA S.A.U.	`9.50ms` from Madrid, ES
72.55.156.216	AS32613 Leaseweb Canada Inc.	`1.47ms` from Montreal, CA
31.23.246.184	AS12389 PJSC Rostelecom	`17.16ms` from Moscow, RU
221.156.179.8	AS4766 Korea Telecom	`6.93ms` from Seoul, KR
222.104.103.120	AS4766 Korea Telecom	`5.93ms` from Seoul, KR
14.88.140.152	AS4766 Korea Telecom	`2.87ms` from Seoul, KR
218.79.14.168	AS4812 China Telecom (Group)	`1.98ms` from Shanghai, CN
31.168.157.248	AS8551 Bezeq International Ltd.	`6.59ms` from Tel Aviv, IL
125.194.110.40	AS2518 BIGLOBE Inc.	`2.39ms` from Tokyo, JP
112.126.111.40	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.14ms` from Beijing, CN
120.153.239.72	AS1221 Telstra Limited	`4.97ms` from Brisbane, AU
35.221.227.56	AS396982 Google LLC	`0.17ms` from Chang-hua, TW
123.146.149.216	AS4837 CHINA UNICOM China169 Backbone	`2.53ms` from Chongqing, CN
113.253.110.8	AS9304 HGC Global Communications Limited	`1.75ms` from Hong Kong, HK
110.8.63.8	AS9318 SK Broadband Co Ltd	`1.82ms` from Incheon, KR
90.218.187.24	AS5607 Sky UK Limited	`11.35ms` from London, GB
187.145.203.104	AS8151 UNINET	`1.73ms` from Mexico City, MX
91.14.156.88	AS3320 Deutsche Telekom AG	`3.56ms` from Nuernberg, DE
210.253.227.104	AS4685 Asahi Net	`3.73ms` from Osaka, JP

Traceroute

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

traceroute -a -n -q1 211.253.121.6

traceroute to 211.253.121.6 (211.253.121.6): 64 hops max, 52 byte packets

1 [AS15169] 172.253.64.138 0.666 ms

2 [AS9286] 121.78.63.69 15.965 ms

3 *

4 [] 139.150.100.124 4.275 ms

5 *

6 *

7 *

8 *

9 [AS17841] 211.253.121.6 7.866 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 30th 2026

What are IP address ranges?

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