210.103.72.0/24

AS17841 · NATIONAL INFORMATION RESOURCES SERVICE

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Summary

Country	South Korea
Domain	kt.com
ASN	AS17841
Registry	APNIC
ID	KORNET

WHOIS Details

inetnum:        210.103.64.0 - 210.103.79.255
netname:        KORNET
descr:          Korea Telecom
country:        KR
admin-c:        IM667-AP
tech-c:         IM667-AP
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2025-11-03T08:14:24Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        9, Jinheung-gil, Naju-si, Jeollanam-do
e-mail:         irt@nic.or.kr
abuse-mailbox:  irt@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        irt@nic.or.kr was validated on 2020-04-09
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-09-04T01:00:01Z
source:         APNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
country:        KR
phone:          +82-2-500-6630
e-mail:         kornet_ip@kt.com
nic-hdl:        IM667-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2017-03-28T06:37:04Z
source:         APNIC

inetnum:        210.103.64.0 - 210.103.79.255
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
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 210.103.0.0/16

Range	ASN	Company	Num of IPs
210.103.128.0/17	AS23593	SEJONG NETWORKS	32,768
210.103.128.0/17	AS9848	SEJONG NETWORKS	32,768
210.103.137.0/24	AS131866	Its-in	256
210.103.155.0/24	AS38676	FLEXNET	256
210.103.187.0/24	AS131866	Its-in	256
210.103.154.0/24	AS38676	FLEXNET	256
210.103.176.0/24	AS38676	FLEXNET	256
210.103.153.0/24	AS38676	FLEXNET	256
210.103.152.0/24	AS38676	FLEXNET	256
210.103.138.0/24	AS131866	Its-in	256

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

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

IP Address	ASN	Details
210.103.72.238	AS17841 NATIONAL INFORMATION RESOURCES SERVICE	`3.46ms` 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
188.203.131.72	AS1136 KPN B.V.	`9.80ms` from Amsterdam, NL
84.195.149.216	AS6848 Telenet BV	`4.96ms` from Brussels, BE
24.9.238.88	AS7922 Comcast Cable Communications, LLC	`3.53ms` from Denver, US
211.203.225.40	AS9318 SK Broadband Co Ltd	`7.19ms` from Incheon, KR
213.1.162.8	AS2856 British Telecommunications PLC	`5.17ms` from London, GB
100.37.224.248	AS701 Verizon Business	`1.98ms` from New York City, US
185.6.140.8	AS43436 SOCIETE DU FIGARO SAS	`0.18ms` from Paris, FR
47.107.205.40	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.61ms` from Shenzhen, CN
15.135.71.248	AS16509 Amazon.com, Inc.	`0.58ms` from Sydney, AU
218.61.129.216	AS4837 CHINA UNICOM China169 Backbone	`1.78ms` from Tieling, CN
93.115.24.152	AS16125 UAB Cherry Servers	`2.92ms` from Vilnius, LT
188.237.60.24	AS8926 Moldtelecom SA	`3.34ms` from Chisinau, MD
45.56.153.120	AS3257 GTT Communications Inc.	`0.23ms` from Dallas, US
178.201.222.8	AS3209 Vodafone GmbH	`7.41ms` from Duesseldorf, DE
161.156.72.200	AS36351 IBM Cloud	`0.63ms` from Frankfurt am Main, DE
183.134.201.216	AS4134 CHINANET-BACKBONE	`4.37ms` from Hangzhou, CN
121.158.219.136	AS4766 Korea Telecom	`7.13ms` from Incheon, KR
91.147.53.8	AS12389 PJSC Rostelecom	`15.93ms` from Khabarovsk, RU
84.8.248.104	AS31898 Oracle Corporation	`2.54ms` from Milan, IT
24.45.6.184	AS6128 Cablevision Systems Corp.	`6.17ms` from New York City, US
169.44.198.248	AS36351 IBM Cloud	`0.80ms` from San Jose, US
13.64.62.40	AS8075 Microsoft Corporation	`0.56ms` from San Jose, US
23.203.55.168	AS20940 Akamai International B.V.	`2.90ms` from Seattle, US
121.139.83.136	AS4766 Korea Telecom	`1.53ms` from Seoul, KR
140.227.105.232	AS2514 NTT PC Communications, Inc.	`0.71ms` from Tokyo, JP

Traceroute

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

traceroute -a -n -q1 210.103.72.241

traceroute to 210.103.72.241 (210.103.72.241): 64 hops max, 52 byte packets

1 [AS1312] 128.173.236.1 12.858 ms

2 [AS1312] 128.173.0.234 0.521 ms

3 [AS1312] 128.173.0.233 0.939 ms

4 [AS1312] 128.173.0.217 0.906 ms

5 *

6 [AS1312] 192.70.187.21 7.407 ms

7 *

8 *

9 [AS6939] 64.71.165.22 63.254 ms

10 [AS4766] 112.174.89.253 645.167 ms

11 [AS4766] 112.174.91.177 188.675 ms

12 [AS4766] 112.174.92.90 189.853 ms

13 [AS4766] 203.234.255.226 197.478 ms

14 *

15 *

16 *

17 *

18 *

19 *

20 [AS17841] 210.103.72.241 199.954 ms

Measurement taken from

IPinfo ProbeNet in Blacksburg, US

On April 13th 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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