All IP Ranges
121.0.0.0/8
AS4766 | 121.160.0.0/11

121.160.0.0/11

AS4766 · Korea Telecom

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Summary

Country	South Korea
Domain	kt.com
ASN	AS4766
Registry	APNIC
ID	KORNET

WHOIS Details

inetnum:        121.160.0.0 - 121.191.255.255
netname:        KORNET
descr:          Korea Telecom
admin-c:        IM667-AP
tech-c:         IM667-AP
country:        KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
changed:        hostmaster@nic.or.kr 20170203
source:         APNIC

irt:            IRT-KRNIC-KR
address:        Seoul Songpa-gu Jungdae-ro 135
e-mail:         hostmaster@nic.or.kr
abuse-mailbox:  hostmaster@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr 20150513
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
changed:        hostmaster@nic.or.kr 20170328
source:         APNIC

inetnum:        121.160.0.0 - 121.191.255.255
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.krnic.net.
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        
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
source:         KRNIC

person:         IP Manager
address:        Gyeonggi-do Bundang-gu, Seongnam-si Buljeong-ro 90
address:        
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
source:         KRNIC

Hosted domains

There are 2,961 domain names hosted across 1,602 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
121.169.120.42	gaidd.or.kr	50
121.170.181.212	yulsuwon.com	26
121.162.146.3	hmcne.com	25
121.189.15.230	kamcosimc.com	12
121.162.19.88	weeklykorea.co.kr	11
121.189.15.228	insuladd.kr	11
121.188.118.135	b77.kr	8
121.185.143.57	analesson.com	7
121.184.79.15	wscard.net	6
121.189.58.240	blognawa.com	6
121.167.224.100	2023wwn.shop	6
121.189.18.173	seoajin.net	6
121.162.139.213	netdisk.co.kr	5
121.167.45.2	autoxmlai.com	5
121.173.20.22	iroyalbath.com	5
121.181.14.165	bjsnco.kr	5
121.172.115.16	isimjang.com	5
121.189.58.21	towntalk.kr	5
121.188.164.218	1647.co.kr	5
121.170.4.175	youmile.cn	5

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

1,175,952 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
121.191.171.6	AS4766 Korea Telecom	`2.89ms` from Seoul, KR
121.191.138.151	AS4766 Korea Telecom	`3.25ms` from Seoul, KR
121.191.93.62	AS4766 Korea Telecom	`3.86ms` from Seoul, KR
121.191.152.250	AS4766 Korea Telecom	`4.04ms` from Seoul, KR
121.191.158.32	AS4766 Korea Telecom	`2.93ms` from Seoul, KR
121.191.239.129	AS4766 Korea Telecom	`3.23ms` from Seoul, KR
121.191.70.193	AS4766 Korea Telecom	`3.15ms` from Seoul, KR
121.191.48.1	AS4766 Korea Telecom	`2.92ms` from Seoul, KR
121.191.251.129	AS4766 Korea Telecom	`3.91ms` from Seoul, KR
121.191.86.235	AS4766 Korea Telecom	`2.65ms` from Seoul, KR
121.191.50.178	AS4766 Korea Telecom	`3.82ms` from Seoul, KR
121.191.199.158	AS4766 Korea Telecom	`3.15ms` from Seoul, KR
121.191.141.1	AS4766 Korea Telecom	`3.26ms` from Seoul, KR
121.191.84.192	AS4766 Korea Telecom	`3.05ms` from Seoul, KR
121.191.122.129	AS4766 Korea Telecom	`3.36ms` from Seoul, KR
121.191.189.254	AS4766 Korea Telecom	`4.98ms` from Seoul, KR
121.191.229.129	AS4766 Korea Telecom	`3.13ms` from Seoul, KR
121.191.235.13	AS4766 Korea Telecom	`3.98ms` from Seoul, KR
121.191.192.3	AS4766 Korea Telecom	`3.21ms` from Seoul, KR
121.191.126.178	AS4766 Korea Telecom	`3.25ms` from Seoul, KR
121.191.180.1	AS4766 Korea Telecom	`3.59ms` from Seoul, KR
121.191.92.94	AS4766 Korea Telecom	`3.00ms` from Seoul, KR
121.191.252.225	AS4766 Korea Telecom	`3.67ms` from Seoul, KR
121.191.59.240	AS4766 Korea Telecom	`2.98ms` from Seoul, KR
121.191.227.197	AS4766 Korea Telecom	`3.43ms` 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
88.77.225.27	AS3209 Vodafone GmbH	`3.94ms` from Hamburg, DE
70.117.179.251	AS11427 Charter Communications Inc	`10.17ms` from Houston, US
185.41.66.75	AS50272 AVUR AS	`7.37ms` from Oslo, NO
75.202.193.27	AS6167 Verizon Business	`11.17ms` from Portland, US
218.18.219.107	AS4134 CHINANET-BACKBONE	`2.27ms` from Shenzhen, CN
173.238.128.203	AS7992 Cogeco Connexion Inc.	`8.75ms` from Toronto, CA
173.22.190.107	AS30036 Mediacom Communications Corp	`12.58ms` from Chicago, US
52.159.52.139	AS8075 Microsoft Corporation	`3.13ms` from Denver, US
31.128.182.11	AS56465 Therecom Ltd	`7.06ms` from Kyiv, UA
196.75.36.155	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`12.71ms` from Lisbon, PT
90.204.234.219	AS5607 Sky UK Limited	`11.37ms` from London, GB
198.23.128.43	AS36352 HostPapa	`0.37ms` from Los Angeles, US
2.21.32.27	AS34164 Akamai International B.V.	`0.22ms` from Madrid, ES
201.232.16.43	AS13489 UNE EPM TELECOMUNICACIONES S.A.	`2.13ms` from Medellin, CO
23.196.226.27	AS20940 Akamai International B.V.	`0.66ms` from San Jose, US
117.110.22.43	AS9316 DACOM-PUBNETPLUS	`2.08ms` from Seoul, KR
47.106.206.203	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.13ms` from Shenzhen, CN
94.156.222.155	AS34224 Neterra Ltd.	`0.49ms` from Sofia, BG
203.111.115.123	AS2764 AAPT Limited	`0.56ms` from Sydney, AU
87.71.226.203	AS12400 Partner Communications Ltd.	`1.30ms` from Tel Aviv, IL
64.203.129.251	AS7795 LUMOS Networks, Inc.	`7.51ms` from Ashburn, US
200.96.250.251	AS8167 V tal	`0.62ms` from Brasilia, BR
18.157.116.171	AS16509 Amazon.com, Inc.	`0.17ms` from Frankfurt am Main, DE
77.187.31.107	AS6805 Telefonica Germany GmbH & Co.OHG	`3.65ms` from Frankfurt am Main, DE
61.167.55.139	AS4837 CHINA UNICOM China169 Backbone	`14.77ms` from Liaoyang, CN

Traceroute

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

traceroute -a -n -q1 -f7 121.170.27.3

traceroute to 121.170.27.3 (121.170.27.3): 64 hops max, 52 byte packets

7 [AS4766] 112.174.99.254 1.527 ms

8 *

9 [AS4766] 112.189.171.26 2.155 ms

10 [AS4766] 121.170.27.3 2.496 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On September 4th 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.

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