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
98.64.166.216	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
73.216.201.184	AS7922 Comcast Cable Communications, LLC	`9.86ms` from Ashburn, US
44.234.43.248	AS16509 Amazon.com, Inc.	`0.52ms` from Boardman, US
108.49.53.24	AS701 Verizon Business	`1.55ms` from Boston, US
45.185.137.232	AS269377 W.A.TECNOLOGIA LTDA	`15.06ms` from Brasilia, BR
86.152.203.168	AS2856 British Telecommunications PLC	`2.15ms` from London, GB
217.80.138.104	AS3320 Deutsche Telekom AG	`1.80ms` from Nuernberg, DE
162.250.160.232	AS62938 Sky Valley Network	`2.21ms` from San Diego, US
16.16.156.216	AS16509 Amazon.com, Inc.	`0.99ms` from Stockholm, SE
183.184.254.8	AS4837 CHINA UNICOM China169 Backbone	`2.73ms` from Taiyuan, CN
196.70.87.56	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`8.33ms` from Casablanca, MA
190.96.123.200	AS262150 Empresa Provincial de Energia de Cordoba	`9.37ms` from Cordoba, AR
79.207.227.56	AS3320 Deutsche Telekom AG	`2.21ms` from Duesseldorf, DE
60.13.114.72	AS4837 CHINA UNICOM China169 Backbone	`13.80ms` from Guangzhou, CN
150.40.235.184	AS136907 HUAWEI CLOUDS	`0.77ms` from Hong Kong, HK
146.113.137.8	AS23089 Hotwire Communications	`3.40ms` from Miami, US
79.2.90.8	AS3269 Telecom Italia S.p.A.	`6.46ms` from Milan, IT
111.171.103.184	AS38109 SK Broadband Co Ltd	`11.74ms` from Seoul, KR
121.142.97.104	AS4766 Korea Telecom	`1.23ms` from Seoul, KR
4.216.37.72	AS8075 Microsoft Corporation	`0.56ms` from Tokyo, JP
114.253.159.248	AS4808 China Unicom Beijing Province Network	`3.87ms` from Beijing, CN
20.114.229.136	AS8075 Microsoft Corporation	`0.29ms` from Boydton, US
109.138.92.120	AS5432 Proximus NV	`2.20ms` from Brussels, BE
91.43.232.88	AS3320 Deutsche Telekom AG	`5.50ms` from Frankfurt am Main, DE
116.2.101.200	AS4837 CHINA UNICOM China169 Backbone	`15.50ms` from Harbin, CN

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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