1. All IP Ranges
  2. 121.0.0.0/8
  3. AS4766  | 121.128.0.0/11

121.128.0.0/11

AS4766  ·  Korea Telecom

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Summary

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

WHOIS Details

inetnum:        121.128.0.0 - 121.159.255.255
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:        121.128.0.0 - 121.159.255.255
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

Nearby Ranges

BGP prefixes that overlap with 121.0.0.0/8

Range ASN Company Num of IPs
121.160.0.0/11 AS38696 Korea Telecom 2,097,152
121.160.0.0/11 AS17859 Korea Telecom 2,097,152
121.160.0.0/11 AS10167 Korea Telecom 2,097,152
121.160.0.0/11 AS45399 Korea Telecom 2,097,152
121.160.0.0/11 AS55622 Korea Telecom 2,097,152
121.160.0.0/11 AS38392 Korea Telecom 2,097,152
121.160.0.0/11 AS55615 Korea Telecom 2,097,152
121.160.0.0/11 AS23582 Korea Telecom 2,097,152
121.160.0.0/11 AS17862 Korea Telecom 2,097,152
121.160.0.0/11 AS38391 Korea Telecom 2,097,152
121.160.0.0/11 AS38415 Korea Telecom 2,097,152
121.160.0.0/11 AS38427 Korea Telecom 2,097,152
121.160.0.0/11 AS38431 Korea Telecom 2,097,152
121.160.0.0/11 AS4766 Korea Telecom 2,097,152
121.160.0.0/11 AS9778 Korea Telecom 2,097,152
121.160.0.0/11 AS9843 Korea Telecom 2,097,152
121.160.0.0/11 AS38093 Korea Telecom 2,097,152
121.160.0.0/11 AS9708 Korea Telecom 2,097,152
121.160.0.0/11 AS9530 Korea Telecom 2,097,152
121.160.0.0/11 AS9684 Korea Telecom 2,097,152
121.160.0.0/11 AS38089 Korea Telecom 2,097,152
121.160.0.0/11 AS9647 Korea Telecom 2,097,152
121.160.0.0/11 AS3786 Korea Telecom 2,097,152
121.160.0.0/11 AS38087 Korea Telecom 2,097,152
121.160.0.0/11 AS38404 Korea Telecom 2,097,152
121.224.0.0/12 AS4134 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS137702 CHINANET jiangsu province network 1,048,576

Hosted domains

There are 5,742 domain names hosted across 1,897 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
121.152.44.120 koonsung.or.kr 312
121.140.43.236 jongbo.com 155
121.152.44.142 eunjaebaek.com 80
121.152.44.147 kwsprings.com 67
121.140.37.75 dreamspacer.net 62
121.152.44.193 setmission.com 51
121.152.44.179 ondokim.com 43
121.152.44.150 cd.or.kr 41
121.152.44.152 posthumantek.co.kr 37
121.152.44.171 kcsi.kr 33
121.152.44.180 krbird.co.kr 30
121.152.44.156 chammedical.kr 29
121.152.44.206 unidus.co.kr 28
121.152.44.199 kccsystem.co.kr 28
121.152.44.168 totalfl.com 27
121.152.44.173 chonparks.com 22
121.152.44.175 phic.kr 19
121.156.104.1 elihighkid.kr 17
121.152.44.174 rcm.pe.kr 16
121.152.44.162 princesspen.com 14

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

1,157,599 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
121.133.122.254 AS4766 Korea Telecom 1.29ms from Seoul, KR
121.133.197.129 AS4766 Korea Telecom 1.33ms from Seoul, KR
121.134.62.41 AS4766 Korea Telecom 1.35ms from Seoul, KR
121.133.158.218 AS4766 Korea Telecom 1.24ms from Seoul, KR
121.133.178.1 AS4766 Korea Telecom 1.56ms from Seoul, KR
121.134.61.254 AS4766 Korea Telecom 1.18ms from Seoul, KR
121.133.202.8 AS4766 Korea Telecom 1.36ms from Seoul, KR
121.134.60.254 AS4766 Korea Telecom 1.09ms from Seoul, KR
121.134.67.126 AS4766 Korea Telecom 1.18ms from Seoul, KR
121.133.177.193 AS4766 Korea Telecom 1.27ms from Seoul, KR
121.133.193.204 AS4766 Korea Telecom 3.82ms from Seoul, KR
121.133.181.214 AS4766 Korea Telecom 1.78ms from Seoul, KR
121.133.142.2 AS4766 Korea Telecom 1.59ms from Seoul, KR
121.133.189.1 AS4766 Korea Telecom 1.67ms from Seoul, KR
121.133.204.189 AS4766 Korea Telecom 1.80ms from Seoul, KR
121.133.236.1 AS4766 Korea Telecom 1.90ms from Seoul, KR
121.133.230.201 AS4766 Korea Telecom 1.65ms from Seoul, KR
121.133.148.193 AS4766 Korea Telecom 1.22ms from Seoul, KR
121.133.129.131 AS4766 Korea Telecom 1.04ms from Seoul, KR
121.134.38.214 AS4766 Korea Telecom 1.46ms from Seoul, KR
121.133.251.1 AS4766 Korea Telecom 1.96ms from Seoul, KR
121.134.44.211 AS4766 Korea Telecom 1.13ms from Seoul, KR
121.133.157.254 AS4766 Korea Telecom 1.32ms from Seoul, KR
121.133.216.200 AS4766 Korea Telecom 1.53ms from Seoul, KR
121.134.53.185 AS4766 Korea Telecom 1.13ms 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
86.94.159.91 AS1136 KPN B.V. 2.68ms from Amsterdam, NL
196.200.235.59 AS37349 Aptus Solutions Ltd 0.67ms from Dar es Salaam, TZ
79.218.97.11 AS3320 Deutsche Telekom AG 2.43ms from Frankfurt am Main, DE
129.13.112.251 AS34878 Karlsruhe Institute of Technology 3.77ms from Frankfurt am Main, DE
89.140.251.235 AS6739 VODAFONE ONO, S.A. 15.36ms from Madrid, ES
181.139.141.59 AS13489 UNE EPM TELECOMUNICACIONES S.A. 4.51ms from Medellin, CO
179.167.60.219 AS26599 TELEFÔNICA BRASIL S.A 2.13ms from Osasco, BR
44.211.219.91 AS14618 Amazon.com, Inc. 0.44ms from Reston, US
189.142.163.91 AS8151 UNINET 5.00ms from Santiago de Queretaro, MX
220.132.169.219 AS3462 Data Communication Business Group 5.65ms from Taichung, TW
114.41.8.107 AS3462 Data Communication Business Group 1.98ms from Taichung, TW
222.138.61.219 AS4837 CHINA UNICOM China169 Backbone 3.40ms from Zhengzhou, CN
44.227.224.235 AS16509 Amazon.com, Inc. 0.17ms from Boardman, US
196.115.237.107 AS36925 MEDITELECOM 2.59ms from Casablanca, MA
118.121.1.155 AS4134 CHINANET-BACKBONE 4.70ms from Chengdu, CN
52.49.254.235 AS16509 Amazon.com, Inc. 0.17ms from Dublin, IE
3.123.153.11 AS16509 Amazon.com, Inc. 0.48ms from Frankfurt am Main, DE
223.235.45.107 AS24560 Bharti Airtel Ltd., Telemedia Services 14.99ms from Kolkata, IN
46.37.214.203 AS44078 Skyline Electronics Ltd. 6.90ms from Kyiv, UA
92.41.159.203 AS206067 Hutchison 3G UK Limited 6.98ms from London, GB
91.125.12.27 AS6871 Plusnet 2.13ms from London, GB
151.170.3.251 AS39326 Syntura Group Limited 8.95ms from Manchester, GB
99.32.157.27 AS7018 AT&T Enterprises, LLC 9.73ms from Miami, US
60.94.150.11 AS17676 SoftBank Corp. 4.11ms from Osaka, JP
129.24.109.123 AS3388 University of New Mexico 14.64ms from Phoenix, US

Traceroute

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

$
traceroute -a -n -q1 121.141.86.254
traceroute to 121.141.86.254 (121.141.86.254): 64 hops max, 52 byte packets
3 *
4 *
6 *
7 *
Measurement taken from IPinfo ProbeNet in Seoul, KR
On

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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