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:        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

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	`6.85ms` 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
37.80.68.40	AS3320 Deutsche Telekom AG	`19.52ms` from Berlin, DE
97.120.168.40	AS209 CenturyLink Communications, LLC	`1.90ms` from Hillsboro, US
178.150.165.232	AS13188 CONTENT DELIVERY NETWORK LTD	`7.15ms` from Kyiv, UA
193.242.214.136	AS198943 Electricity Authority of Cyprus	`1.69ms` from Larnaca, CY
97.189.160.104	AS6167 Verizon Business	`9.50ms` from Los Angeles, US
34.144.214.8	AS396982 Google LLC	`0.07ms` from Melbourne, AU
163.116.191.40	AS55256 Netskope Inc	`0.52ms` from Riyadh, SA
20.66.68.216	AS8075 Microsoft Corporation	`0.55ms` from San Jose, US
119.215.188.248	AS4766 Korea Telecom	`4.02ms` from Seoul, KR
43.106.0.216	AS45102 Alibaba (US) Technology Co., Ltd.	`0.78ms` from Singapore, SG
37.97.208.88	AS20857 Signet B.V.	`0.60ms` from Amsterdam, NL
174.77.60.104	AS22773 Cox Communications Inc.	`0.33ms` from Atlanta, US
74.92.15.184	AS7922 Comcast Cable Communications, LLC	`7.40ms` from Boston, US
84.3.17.216	AS5483 Magyar Telekom Plc.	`7.16ms` from Budapest, HU
190.51.171.168	AS22927 Telefonica de Argentina	`2.06ms` from Buenos Aires, AR
139.210.163.8	AS4837 CHINA UNICOM China169 Backbone	`4.30ms` from Changchun, CN
73.22.112.88	AS7922 Comcast Cable Communications, LLC	`6.05ms` from Chicago, US
75.179.20.56	AS10796 Charter Communications Inc	`10.36ms` from Columbus, US
89.185.159.232	AS41678 The Internet Business Ltd	`0.18ms` from Dublin, IE
212.86.200.232	AS12480 ILK Internet.Gmbh	`2.00ms` from Frankfurt am Main, DE
59.61.210.120	AS4134 CHINANET-BACKBONE	`8.63ms` from Fuzhou, CN
123.203.218.136	AS9269 Hong Kong Broadband Network Ltd.	`1.13ms` from Hong Kong, HK
2.220.58.120	AS5607 Sky UK Limited	`4.59ms` from London, GB
86.210.16.88	AS3215 Orange S.A.	`12.46ms` from Marseille, FR
188.13.229.120	AS3269 Telecom Italia S.p.A.	`4.51ms` from Milan, IT

Traceroute

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

traceroute -a -n -q1 211.57.153.115

traceroute to 211.57.153.115 (211.57.153.115): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.58 0.082 ms

2 *

3 [AS3786] 211.118.152.141 1.524 ms

4 *

5 *

6 *

7 *

8 [AS3786] 1.208.179.158 18.981 ms

9 [AS3786] 210.107.53.202 3.992 ms

10 *

11 *

12 *

13 *

14 [AS17841] 211.57.153.115 9.495 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On December 28th 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.

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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