211.57.153.0/24

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:        211.57.152.0 - 211.57.155.255
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:        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

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

Nearby Ranges

BGP prefixes that overlap with 211.57.0.0/16

No nearby ranges found.

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

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

IP Address	ASN	Details
211.57.153.113	AS17841 NATIONAL INFORMATION RESOURCES SERVICE	`6.86ms` 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
132.250.81.72	AS48 Navy Network Information Center (NNIC)	`2.73ms` from Ashburn, US
96.33.85.136	AS20115 Charter Communications LLC	`5.43ms` from Atlanta, US
185.99.133.248	AS61138 Zappie Host	`0.18ms` from Auckland, NZ
123.146.162.24	AS4837 CHINA UNICOM China169 Backbone	`4.47ms` from Chongqing, CN
52.117.173.88	AS36351 IBM Cloud	`0.89ms` from Dallas, US
79.218.157.216	AS3320 Deutsche Telekom AG	`4.99ms` from Duesseldorf, DE
82.44.125.24	AS5089 Virgin Media Limited	`3.31ms` from Erith, GB
27.113.105.40	AS9781 GREEN CABLE TELEVISION STATION	`5.89ms` from Incheon, KR
185.201.76.168	AS208808 Enegan S.p.A.	`3.42ms` from Milan, IT
74.66.70.40	AS12271 Charter Communications Inc	`5.64ms` from Morris Plains, US
67.85.90.248	AS6128 Cablevision Systems Corp.	`2.58ms` from New York City, US
202.218.50.40	AS4694 IDC Frontier Inc.	`0.58ms` from Osaka, JP
153.227.142.248	AS4713 NTT DOCOMO BUSINESS,Inc.	`8.58ms` from Osaka, JP
107.22.13.88	AS14618 Amazon.com, Inc.	`0.25ms` from Reston, US
172.202.226.40	AS8075 Microsoft Corporation	`0.25ms` from San Antonio, US
118.167.83.72	AS3462 Data Communication Business Group	`1.46ms` from Taipei, TW
81.18.207.184	AS9141 P4 Sp. z o.o.	`0.56ms` from Warsaw, PL
194.171.42.8	AS1103 SURF B.V.	`1.94ms` from Amsterdam, NL
75.248.129.168	AS6167 Verizon Business	`17.27ms` from Denver, US
183.246.58.88	AS56041 China Mobile communications corporation	`12.16ms` from Hangzhou, CN
195.147.103.40	AS5413 Wavenet Limited	`10.49ms` from London, GB
85.59.67.184	AS12479 Orange Espagne SA	`2.13ms` from Madrid, ES
180.138.17.120	AS4134 CHINANET-BACKBONE	`6.21ms` from Nanning, CN
79.225.201.200	AS3320 Deutsche Telekom AG	`6.58ms` from Nuernberg, DE
45.225.66.104	AS262847 DBUG TELECOM LTDA	`6.70ms` from Osasco, BR

Traceroute

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

traceroute -a -n -q1 211.57.153.97

traceroute to 211.57.153.97 (211.57.153.97): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.60 0.064 ms

2 [AS3786] 211.118.152.142 0.963 ms

3 [AS3786] 211.118.152.141 1.644 ms

4 *

5 *

6 *

7 *

8 [AS3786] 1.213.152.150 2.591 ms

9 [AS3786] 210.107.53.202 3.531 ms

10 *

11 *

12 *

13 *

14 [AS17841] 211.57.153.97 9.007 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 9th 2026

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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