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  2. 121.0.0.0/8
  3. AS4766  | 121.128.0.0/12

121.128.0.0/12

AS4766  ·  Korea Telecom

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Summary

Country South Korea
Domain kt.com
ASN AS4766
Parent Range 121.128.0.0/11
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:        [email protected] 20170203
source:         APNIC

irt:            IRT-KRNIC-KR
address:        Seoul Songpa-gu Jungdae-ro 135
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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:         [email protected]
nic-hdl:        IM667-AP
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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:        [email protected]
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:         [email protected]
nic-hdl:        IA9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected]
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:         [email protected]
nic-hdl:        IM9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected]
source:         KRNIC

Overlapping Ranges

BGP prefixes that contain 121.128.0.0/12

Range ASN Company Num of IPs
121.128.0.0/11 AS17588 Korea Telecom 2,097,152
121.128.0.0/11 AS18333 Korea Telecom 2,097,152
121.128.0.0/11 AS4766 Korea Telecom 2,097,152
121.128.0.0/11 AS38122 Korea Telecom 2,097,152
121.128.0.0/11 AS9647 Korea Telecom 2,097,152
121.128.0.0/11 AS9856 Korea Telecom 2,097,152

BGP prefixes that are contained by 121.128.0.0/12

Range ASN Company Num of IPs
121.128.97.0/24 AS152214 Korea Telecom 256
121.131.216.0/24 AS152214 Korea Telecom 256
121.141.60.0/24 AS9526 (ju)koseu 256
121.140.97.0/24 AS9530 (ju) sinsegyeaissi 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
121.139.137.0/24 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
121.140.76.0/24 AS9524 Korea Telecom 256
121.141.229.0/24 AS9526 (ju)koseu 256

Nearby Ranges

BGP prefixes that overlap with 121.0.0.0/8

Range ASN Company Num of IPs
121.160.0.0/11 AS23582 Korea Telecom 2,097,152
121.128.0.0/11 AS17588 Korea Telecom 2,097,152
121.128.0.0/11 AS38122 Korea Telecom 2,097,152
121.160.0.0/11 AS38089 Korea Telecom 2,097,152
121.128.0.0/11 AS18333 Korea Telecom 2,097,152
121.128.0.0/11 AS9856 Korea Telecom 2,097,152
121.128.0.0/11 AS9647 Korea Telecom 2,097,152
121.160.0.0/11 AS4766 Korea Telecom 2,097,152
121.128.0.0/11 AS4766 Korea Telecom 2,097,152
121.224.0.0/12 AS4134 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 AS146966 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 AS137699 CHINANET jiangsu province network 1,048,576
121.208.0.0/12 AS1221 Telstra Limited 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 AS137697 CHINANET jiangsu province network 1,048,576
121.112.0.0/13 AS4713 NTT DOCOMO BUSINESS,Inc. 524,288
121.8.0.0/13 AS135089 CHINANET Guangdong province network 524,288
121.16.0.0/13 AS4837 China Unicom Hebei province network 524,288
121.8.0.0/13 AS136199 CHINANET Guangdong province network 524,288
121.8.0.0/13 AS4134 CHINANET Guangdong province network 524,288
121.8.0.0/13 AS140308 CHINANET Guangdong province network 524,288
121.204.0.0/14 AS4134 CHINANET Fujian province network 262,144
121.60.0.0/14 AS4134 CHINANET Hubei province network 262,144
121.24.0.0/14 AS4837 China Unicom Hebei province network 262,144
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 AS148981 CHINANET Hubei province network 262,144
121.64.0.0/14 AS17598 LG DACOM Corporation 262,144
121.248.0.0/14 AS4538 China Education and Research Network 262,144
121.40.0.0/14 AS37963 Aliyun Computing Co., LTD 262,144
121.80.0.0/14 AS17511 OPTAGE Inc. 262,144
121.196.0.0/14 AS37963 Aliyun Computing Co., LTD 262,144
121.204.0.0/14 AS133776 CHINANET Fujian province network 262,144
121.204.0.0/14 AS133775 CHINANET Fujian province network 262,144
121.204.0.0/14 AS133774 CHINANET Fujian province network 262,144
121.64.0.0/14 AS23555 LG DACOM Corporation 262,144
121.84.0.0/14 AS17511 OPTAGE Inc. 262,144
121.64.0.0/14 AS17586 LG DACOM Corporation 262,144
121.124.0.0/15 AS9318 SK Broadband Co Ltd 131,072
121.44.0.0/15 AS4739 iiNet Limited 131,072
121.96.0.0/15 AS6648 Bayan Telecommunications Incorporated 131,072
121.2.0.0/15 AS2527 Sony Network Communications Inc. 131,072
121.4.0.0/15 AS132203 Tencent cloud computing (Beijing) Co., Ltd. 131,072
121.44.0.0/15 AS7545 iiNet Limited 131,072
121.202.0.0/15 AS17924 SmarTone Mobile Communications Ltd 131,072
121.28.0.0/15 AS4837 China Unicom Hebei province network 131,072
121.48.0.0/15 AS4538 China Education and Research Network 131,072

Hosted domains

There are 2,602 domain names hosted across 1,200 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
121.141.6.56 emct.kr 12
121.141.70.19 century.kr 12
121.138.248.144 ahnsahnghong.com 12
121.138.248.67 vnwatv.org 11
121.141.70.12 kitutennis.co.kr 10
121.129.56.50 nationalteam.or.kr 8
121.133.2.0 xn--1lqw2ai0fl00cqfm.com 8
121.141.70.17 kituramihomsys.kr 7
121.134.74.70 hyosungibill.co.kr 7
121.133.85.162 ieulhealthcare.com 6
121.141.137.64 vtalk.co.kr 6
121.137.210.41 kindauthor.com 6
121.136.95.140 n-telecom.co.kr 6
121.143.143.57 atcg.ml 5
121.142.24.171 cobatec.co.kr 5
121.129.166.41 jgihun.kr 5
121.134.42.114 coreamigos.com 5
121.141.141.113 danceforest.co.kr 5
121.136.237.239 kopress.kr 5
121.140.204.7 pline.co.kr 4

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

553,739 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
121.142.166.224 AS4766 Korea Telecom 1.46ms from Seoul, KR
121.142.143.170 AS4766 Korea Telecom 1.43ms from Seoul, KR
121.142.84.242 AS4766 Korea Telecom 1.33ms from Seoul, KR
121.142.127.39 AS4766 Korea Telecom 1.54ms from Seoul, KR
121.142.107.158 AS4766 Korea Telecom 1.55ms from Seoul, KR
121.142.93.153 AS4766 Korea Telecom 1.80ms from Seoul, KR
121.142.225.32 AS4766 Korea Telecom 1.40ms from Seoul, KR
121.142.116.23 AS4766 Korea Telecom 1.79ms from Seoul, KR
121.142.88.40 AS4766 Korea Telecom 1.39ms from Seoul, KR
121.142.178.2 AS4766 Korea Telecom 1.58ms from Seoul, KR
121.142.142.36 AS4766 Korea Telecom 1.41ms from Seoul, KR
121.142.128.254 AS4766 Korea Telecom 1.71ms from Seoul, KR
121.142.198.104 AS4766 Korea Telecom 1.53ms from Seoul, KR
121.142.109.146 AS4766 Korea Telecom 1.48ms from Seoul, KR
121.142.222.163 AS4766 Korea Telecom 2.17ms from Seoul, KR
121.142.86.254 AS4766 Korea Telecom 2.12ms from Seoul, KR
121.142.136.175 AS4766 Korea Telecom 1.51ms from Seoul, KR
121.142.133.153 AS4766 Korea Telecom 1.45ms from Seoul, KR
121.142.170.71 AS4766 Korea Telecom 1.53ms from Seoul, KR
121.142.190.225 AS4766 Korea Telecom 1.09ms from Seoul, KR
121.142.221.143 AS4766 Korea Telecom 1.46ms from Seoul, KR
121.142.77.7 AS4766 Korea Telecom 1.77ms from Seoul, KR
121.142.124.107 AS4766 Korea Telecom 1.44ms from Seoul, KR
121.142.114.78 AS4766 Korea Telecom 1.65ms from Seoul, KR
121.142.197.84 AS4766 Korea Telecom 1.59ms 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
178.227.41.140 AS31615 Odido Netherlands B.V. 11.62ms from Amsterdam, NL
222.245.52.172 AS4134 CHINANET-BACKBONE 5.79ms from Changsha, CN
98.183.123.12 AS22773 Cox Communications Inc. 7.85ms from Dallas, US
20.240.151.140 AS8075 Microsoft Corporation 0.21ms from Gaevle, SE
74.177.148.12 AS8075 Microsoft Corporation 0.32ms from London, GB
37.134.206.204 AS12479 Orange Espagne SA 1.35ms from Madrid, ES
113.131.121.156 AS9697 LG HelloVision Corp. 8.15ms from Seoul, KR
58.105.202.236 AS4804 Microplex PTY LTD 1.93ms from Sydney, AU
123.204.136.28 AS4780 Digital United Inc. 1.65ms from Taipei, TW
110.0.31.60 AS10013 FreeBit Co.,Ltd. 8.84ms from Tokyo, JP
99.209.40.108 AS812 Rogers Communications Canada Inc. 0.59ms from Toronto, CA
185.32.232.252 AS60341 Luna.nl B.V. 2.05ms from Amsterdam, NL
200.193.156.172 AS8167 V tal 1.43ms from Curitiba, BR
188.126.185.252 AS12759 Stephan Fuss trading as SoftCom Datensysteme 1.64ms from Duesseldorf, DE
41.175.223.12 AS30844 Liquid Telecommunications Ltd 0.43ms from Johannesburg, ZA
83.203.35.60 AS3215 Orange S.A. 3.03ms from Le Lamentin, MQ
185.158.242.156 AS25369 Hydra Communications Ltd 0.33ms from London, GB
189.138.54.140 AS8151 UNINET 2.26ms from Mexico City, MX
83.216.183.204 AS21309 HERABIT S.p.A. 5.94ms from Milan, IT
79.136.229.172 AS44417 JSC Neotelecom 4.86ms from Novosibirsk, RU
34.231.107.204 AS14618 Amazon.com, Inc. 0.23ms from Reston, US
199.21.232.124 AS33353 Sony Interactive Entertainment LLC 0.32ms from San Jose, US
142.58.179.172 AS11105 Simon Fraser University 4.51ms from Seattle, US
61.84.220.236 AS18164 Mokpo University 7.52ms from Seoul, KR
183.109.225.204 AS4766 Korea Telecom 4.54ms from Seoul, KR

Traceroute

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

$
traceroute -a -n -q1 -f7 121.135.221.205
traceroute to 121.135.221.205 (121.135.221.205): 64 hops max, 52 byte packets
7 [AS4766] 112.174.58.62 6.286 ms
8 *
9 *
Measurement taken from IPinfo ProbeNet in Seoul, KR
On

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