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  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

Overlapping Ranges

BGP prefixes that are contained by 121.128.0.0/11

Range ASN Company Num of IPs
121.151.96.0/24 AS131792 Korea Telecom 256
121.128.97.0/24 AS152214 Korea Telecom 256
121.131.216.0/24 AS152214 Korea Telecom 256
121.144.249.0/24 AS18023 Haeyangdaehakgyo 256
121.144.250.0/24 AS18023 Haeyangdaehakgyo 256
121.139.137.0/24 AS3786 Eseuaitissi jusikhoesa 256
121.131.145.0/24 AS38126 (ju)koseu 256
121.133.198.0/24 AS38394 Korea Telecom 256
121.133.199.0/24 AS38395 Korea Telecom 256
121.133.203.0/24 AS38399 Korea Telecom 256
121.133.209.0/24 AS38412 Korea Telecom 256
121.135.53.0/24 AS38697 Hangyeongdaehakgyo 256
121.135.54.0/24 AS38697 Hangyeongdaehakgyo 256
121.135.55.0/24 AS38697 Hangyeongdaehakgyo 256
121.135.56.0/24 AS38697 Hangyeongdaehakgyo 256
121.135.147.0/24 AS46002 (ju)pyeonghwaijeu 256
121.135.148.0/24 AS46002 (ju)pyeonghwaijeu 256
121.137.151.0/24 AS4766 Bindaehakgyo 256
121.137.185.0/24 AS4766 Hangyeongdaehakgyo 256
121.150.39.0/24 AS4766 Gyeongbukdaehakgyo 256
121.156.150.0/24 AS4766 Hangukgyotongdaehakgyo 256
121.156.153.0/24 AS4766 Hangukgyotongdaehakgyo 256
121.159.242.0/24 AS4766 KT 256
121.159.243.0/24 AS4766 KT 256
121.140.76.0/24 AS9524 Korea Telecom 256
121.141.229.0/24 AS9526 (ju)koseu 256
121.141.60.0/24 AS9526 (ju)koseu 256
121.140.97.0/24 AS9530 (ju) sinsegyeaissi 256
121.157.108.0/24 AS9638 Korea Telecom 256
121.157.110.0/24 AS9638 Korea Telecom 256
121.157.111.0/24 AS9638 Korea Telecom 256
121.128.219.0/24 AS9647 Korea Telecom 256
121.135.246.0/24 AS9696 Korea Telecom 256
121.129.49.0/24 AS9776 (ju)gukmineunhaengbonjeom 256
121.141.101.0/24 AS9776 (ju)ibigukmindeu 256
121.144.148.0/24 AS9870 Donguidaehakgyo 256
121.144.149.0/24 AS9870 Donguidaehakgyo 256

Nearby Ranges

BGP prefixes that overlap with 121.0.0.0/8

Range ASN Company Num of IPs
121.160.0.0/11 AS38089 Korea Telecom 2,097,152
121.160.0.0/11 AS4766 Korea Telecom 2,097,152
121.160.0.0/11 AS23582 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
121.224.0.0/12 AS134770 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS140292 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS134756 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS137697 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS146966 CHINANET jiangsu province network 1,048,576
121.224.0.0/12 AS137699 CHINANET jiangsu province network 1,048,576
121.208.0.0/12 AS1221 Telstra Limited 1,048,576
121.16.0.0/13 AS4837 China Unicom Hebei province network 524,288
121.8.0.0/13 AS135089 CHINANET Guangdong province network 524,288
121.8.0.0/13 AS140308 CHINANET Guangdong province network 524,288
121.8.0.0/13 AS136199 CHINANET Guangdong province network 524,288
121.112.0.0/13 AS4713 NTT DOCOMO BUSINESS,Inc. 524,288
121.8.0.0/13 AS4134 CHINANET Guangdong province network 524,288
121.32.0.0/14 AS4134 CHINANET Guangdong province network 262,144
121.64.0.0/14 AS3786 LG DACOM Corporation 262,144
121.60.0.0/14 AS4134 CHINANET Hubei province network 262,144
121.64.0.0/14 AS23555 LG DACOM Corporation 262,144
121.204.0.0/14 AS4134 CHINANET Fujian province network 262,144
121.204.0.0/14 AS133776 CHINANET Fujian province network 262,144
121.64.0.0/14 AS17598 LG DACOM Corporation 262,144
121.24.0.0/14 AS4837 China Unicom Hebei province network 262,144
121.40.0.0/14 AS37963 Aliyun Computing Co., LTD 262,144
121.204.0.0/14 AS133775 CHINANET Fujian province network 262,144
121.80.0.0/14 AS17511 OPTAGE Inc. 262,144
121.248.0.0/14 AS4538 China Education and Research Network 262,144
121.84.0.0/14 AS17511 OPTAGE Inc. 262,144
121.64.0.0/14 AS17586 LG DACOM Corporation 262,144
121.196.0.0/14 AS37963 Aliyun Computing Co., LTD 262,144
121.204.0.0/14 AS133774 CHINANET Fujian province network 262,144
121.60.0.0/14 AS148981 CHINANET Hubei province network 262,144
121.98.0.0/15 AS9790 Two Degrees Mobile Limited 131,072
121.2.0.0/15 AS2527 Sony Network Communications Inc. 131,072
121.124.0.0/15 AS9318 SK Broadband Co Ltd 131,072
121.44.0.0/15 AS7545 iiNet Limited 131,072
121.4.0.0/15 AS45090 Tencent cloud computing (Beijing) Co., Ltd. 131,072
121.4.0.0/15 AS132203 Tencent cloud computing (Beijing) Co., Ltd. 131,072
121.44.0.0/15 AS4739 iiNet Limited 131,072
121.194.0.0/15 AS4538 China Education and Research Network 131,072
121.28.0.0/15 AS4837 China Unicom Hebei province network 131,072

Hosted domains

There are 5,748 domain names hosted across 1,917 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
121.143.79.109 jeilatec.com 284
121.152.44.142 jebidabang.com 77
121.134.128.35 regeneraactiva.co.kr 76
121.152.44.179 celesphe.net 45
121.152.104.186 bestdealsonline.kr 43
121.152.44.165 robogram.co.kr 40
121.152.44.211 miriyoo.com 32
121.152.44.157 webggum.com 32
121.152.44.168 ansan-rrif.co.kr 27
121.152.44.192 peace-wave.or.kr 26
121.152.44.173 smice.kr 22
121.152.44.172 reno337.pe.kr 21
121.152.44.210 wtma.or.kr 18
121.152.44.184 dongshinpnp.com 18
121.152.44.207 xn--vk1b65obxd6ba878diqgb1a860g.com 17
121.156.104.1 elihigh.com 17
121.131.184.157 msit2030.or.kr 17
121.152.44.174 smallhappy.kr 16
121.149.115.222 shinanculture.net 16
121.152.44.182 zzbe.net 15

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

1,188,735 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
121.137.19.65 AS4766 Korea Telecom 1.49ms from Seoul, KR
121.136.246.238 AS4766 Korea Telecom 1.20ms from Seoul, KR
121.137.16.131 AS4766 Korea Telecom 1.61ms from Seoul, KR
121.137.80.130 AS4766 Korea Telecom 1.42ms from Seoul, KR
121.137.32.246 AS4766 Korea Telecom 2.15ms from Seoul, KR
121.136.176.201 AS4766 Korea Telecom 1.57ms from Seoul, KR
121.136.158.173 AS4766 Korea Telecom 1.27ms from Seoul, KR
121.137.79.72 AS4766 Korea Telecom 1.23ms from Seoul, KR
121.137.51.138 AS4766 Korea Telecom 1.58ms from Seoul, KR
121.137.46.162 AS4766 Korea Telecom 2.09ms from Seoul, KR
121.137.50.129 AS4766 Korea Telecom 1.77ms from Seoul, KR
121.137.84.170 AS4766 Korea Telecom 1.89ms from Seoul, KR
121.137.2.30 AS4766 Korea Telecom 1.68ms from Seoul, KR
121.136.181.115 AS4766 Korea Telecom 1.66ms from Seoul, KR
121.136.213.23 AS4766 Korea Telecom 2.10ms from Seoul, KR
121.137.35.147 AS4766 Korea Telecom 1.23ms from Seoul, KR
121.137.99.132 AS4766 Korea Telecom 1.36ms from Seoul, KR
121.136.210.77 AS4766 Korea Telecom 2.00ms from Seoul, KR
121.136.191.97 AS4766 Korea Telecom 1.60ms from Seoul, KR
121.136.153.9 AS4766 Korea Telecom 1.60ms from Seoul, KR
121.137.66.134 AS4766 Korea Telecom 1.28ms from Seoul, KR
121.136.251.22 AS4766 Korea Telecom 1.47ms from Seoul, KR
121.136.214.21 AS4766 Korea Telecom 1.49ms from Seoul, KR
121.137.69.178 AS4766 Korea Telecom 1.76ms from Seoul, KR
121.137.70.85 AS4766 Korea Telecom 1.37ms 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
161.51.68.235 AS39686 Eurofiber Nederland BV 0.87ms from Amsterdam, NL
1.91.120.43 AS17429 BEIJING GEHUA CATV NETWORK CO.LTD 9.35ms from Beijing, CN
117.216.241.11 AS9829 National Internet Backbone 12.99ms from Chennai, IN
79.192.190.139 AS3320 Deutsche Telekom AG 7.80ms from Frankfurt am Main, DE
193.38.112.27 AS5089 Virgin Media Limited 11.01ms from London, GB
62.49.129.75 AS5378 Vodafone Limited 2.71ms from London, GB
92.132.105.251 AS3215 Orange S.A. 10.30ms from Lyon, FR
95.61.72.107 AS12430 VODAFONE ESPANA S.A.U. 12.32ms from Madrid, ES
3.6.26.235 AS16509 Amazon.com, Inc. 0.14ms from Mumbai, IN
182.90.157.11 AS4837 CHINA UNICOM China169 Backbone 9.10ms from Nanning, CN
93.200.208.219 AS3320 Deutsche Telekom AG 6.86ms from Nuernberg, DE
211.211.43.75 AS9318 SK Broadband Co Ltd 1.60ms from Seoul, KR
216.213.93.123 AS6580 Golden West Telecommunications Coop., Inc. 1.81ms from Sioux Falls, US
109.244.173.139 AS45090 Shenzhen Tencent Computer Systems Company Limited 4.65ms from Tianjin, CN
125.40.227.203 AS4837 CHINA UNICOM China169 Backbone 6.36ms from Zhengzhou, CN
86.90.167.187 AS1136 KPN B.V. 2.46ms from Amsterdam, NL
74.37.206.203 AS5650 Frontier Communications of America, Inc. 12.46ms from Ashburn, US
51.8.75.251 AS8075 Microsoft Corporation 0.33ms from Ashburn, US
202.59.224.155 AS55729 Pacific Technology Solutions Ltd 2.67ms from Auckland, NZ
38.152.101.219 AS55286 B2 Net Solutions Inc. 0.14ms from Buffalo, US
103.117.81.59 AS137923 CiB Net Station Sdn Bhd 0.65ms from Kuala Lumpur, MY
194.55.224.27 AS20326 TeraSwitch Networks Inc. 0.19ms from Los Angeles, US
80.40.11.219 AS13285 TalkTalk Communications Limited 5.71ms from Manchester, GB
38.140.9.203 AS174 Cogent Communications, LLC 0.31ms from New York City, US
114.46.17.123 AS3462 Data Communication Business Group 1.39ms from Taichung, TW

Traceroute

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

$
traceroute -a -n -q1 121.140.81.254
traceroute to 121.140.81.254 (121.140.81.254): 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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