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  2. 61.0.0.0/8
  3. AS4766  | 61.72.0.0/13

61.72.0.0/13

AS4766  ·  Korea Telecom

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Summary

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

WHOIS Details

inetnum:        61.72.0.0 - 61.75.255.255
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:  2025-11-03T08:14:02Z
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:        61.72.0.0 - 61.75.255.255
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.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

Overlapping Ranges

BGP prefixes that are contained by 61.72.0.0/13

Range ASN Company Num of IPs
61.78.157.0/24 AS9784 (ju)ibigukmindeu 256
61.72.46.0/24 AS152221 Yeonhapseutibi 256
61.74.93.0/24 AS9318 Eseuibrodeudeujusikhoesa 256
61.74.94.0/24 AS9318 Eseuibrodeudeujusikhoesa 256
61.75.198.0/24 AS9631 Yeongsandaehakgyo 256
61.75.199.0/24 AS9631 Yeongsandaehakgyo 256
61.75.200.0/24 AS9631 Yeongsandaehakgyo 256
61.75.201.0/24 AS9631 Yeongsandaehakgyo 256
61.76.236.0/24 AS9631 Yeongsandaehakgyo 256
61.76.237.0/24 AS9631 Yeongsandaehakgyo 256
61.76.238.0/24 AS9631 Yeongsandaehakgyo 256
61.78.74.0/24 AS10185 KT 256
61.72.224.0/24 AS17841 KT 256
61.72.225.0/24 AS17841 Korea Telecom 256
61.72.226.0/24 AS17841 Korea Telecom 256
61.72.230.0/24 AS17841 Korea Telecom 256
61.72.238.0/24 AS17841 Korea Telecom 256
61.79.246.0/24 AS38391 Korea Telecom 256
61.77.29.0/24 AS38403 Korea Telecom 256
61.79.88.0/24 AS38403 Korea Telecom 256
61.79.247.0/24 AS38404 Korea Telecom 256
61.77.45.0/24 AS38406 Gyeonggidohwaseongosangyoyukjiwoncheong 256
61.77.19.0/24 AS38408 Gyeonggidoanyanggwacheongyoyukjiwoncheong 256
61.74.191.0/24 AS38427 (ju)poseu 256
61.75.253.0/24 AS38427 (ju)poseu 256
61.75.254.0/24 AS38427 (ju)poseu 256
61.78.113.0/24 AS4766 Seongmobyeongwon 256
61.78.115.0/24 AS4766 Seongmobyeongwon 256
61.73.184.0/24 AS55615 (ju)deojonbijeuon 256
61.73.185.0/24 AS55615 (ju)deojonbijeuon 256
61.73.212.0/24 AS55615 (ju)deojonbijeuon 256
61.78.0.0/24 AS55615 (ju)deojonbijeuon 256
61.78.12.0/24 AS55615 (ju)deojonbijeuon 256
61.74.92.0/24 AS9318 Eseuibrodeudeujusikhoesa 256
61.77.180.0/23 AS4766 Korea Telecom 512
61.72.128.0/23 AS18031 Korea Telecom 512
61.72.126.0/23 AS18031 Korea Telecom 512
61.72.180.0/22 AS4766 KT 1,024

Nearby Ranges

BGP prefixes that overlap with 61.0.0.0/8

Range ASN Company Num of IPs
61.32.0.0/13 AS38122 LG DACOM Corporation 524,288
61.32.0.0/13 AS45363 LG DACOM Corporation 524,288
61.32.0.0/13 AS9955 LG DACOM Corporation 524,288
61.32.0.0/13 AS38428 LG DACOM Corporation 524,288
61.32.0.0/13 AS23714 LG DACOM Corporation 524,288
61.32.0.0/13 AS13335 LG DACOM Corporation 524,288
61.32.0.0/13 AS10178 LG DACOM Corporation 524,288
61.32.0.0/13 AS10058 LG DACOM Corporation 524,288
61.32.0.0/13 AS10185 LG DACOM Corporation 524,288
61.32.0.0/13 AS4766 LG DACOM Corporation 524,288
61.32.0.0/13 AS63199 LG DACOM Corporation 524,288
61.32.0.0/13 AS9863 LG DACOM Corporation 524,288
61.32.0.0/13 AS9857 LG DACOM Corporation 524,288
61.32.0.0/13 AS3786 LG DACOM Corporation 524,288
61.32.0.0/13 AS9946 LG DACOM Corporation 524,288
61.32.0.0/13 AS138195 LG DACOM Corporation 524,288
61.32.0.0/13 AS9638 LG DACOM Corporation 524,288
61.32.0.0/13 AS17586 LG DACOM Corporation 524,288
61.32.0.0/13 AS9578 LG DACOM Corporation 524,288
61.40.0.0/14 AS3786 LG DACOM Corporation 262,144
61.40.0.0/14 AS17586 LG DACOM Corporation 262,144
61.40.0.0/14 AS45978 LG DACOM Corporation 262,144
61.40.0.0/14 AS9871 LG DACOM Corporation 262,144
61.40.0.0/14 AS9955 LG DACOM Corporation 262,144
61.40.0.0/14 AS55585 LG DACOM Corporation 262,144
61.40.0.0/14 AS23714 LG DACOM Corporation 262,144
61.174.0.0/15 AS136190 CHINANET Zhejiang province network 131,072
61.84.0.0/15 AS4766 Korea Telecom 131,072
61.148.0.0/15 AS4808 China Unicom IP network 131,072
61.174.0.0/15 AS4134 CHINANET Zhejiang province network 131,072
61.52.0.0/15 AS4837 China Unicom Henan province network 131,072
61.167.0.0/16 AS4837 China Unicom Heilongjiang province network 65,536
61.59.0.0/16 AS4780 Digital United Inc. 65,536
61.156.0.0/16 AS4837 China Unicom IP network 65,536
61.163.0.0/16 AS4837 China Unicom Henan province network 65,536
61.188.0.0/16 AS4134 CHINANET Sichuan province network 65,536
61.66.0.0/16 AS4780 New Centry InfoComm Tech. Co., Ltd. 65,536
61.168.0.0/16 AS4837 China Unicom Henan province network 65,536
61.178.0.0/16 AS4134 CHINANET Gansu province network 65,536
61.164.0.0/16 AS4134 CHINANET Zhejiang province network 65,536
61.157.0.0/16 AS4134 CHINANET Sichuan province network 65,536
61.177.0.0/16 AS4134 CHINANET jiangsu province network 65,536
61.246.0.0/16 AS24560 Bharti Broadband networks Limited 65,536
61.197.0.0/16 AS2514 NTT PC Communications,Inc. 65,536
61.89.0.0/16 AS18081 Kintetsu Cable Network Ltd. 65,536
61.166.0.0/16 AS4134 CHINANET Yunnan province network 65,536
61.185.0.0/16 AS4134 CHINANET Shanxi(SN) province network 65,536
61.147.0.0/16 AS137697 CHINANET jiangsu province network 65,536
61.154.0.0/16 AS140329 CHINANET Fujian province network 65,536
61.154.0.0/16 AS140330 CHINANET Fujian province network 65,536

Hosted domains

There are 11,428 domain names hosted across 735 IP addresses on this ASN. Checkout our API to access full domain hosting information.

IP Address Domain Domains on this IP
61.78.75.231 atb-school.kr 2685
61.78.75.253 koreaedugroup.com 1050
61.78.36.48 bonbonbeauty.kr 839
61.78.36.49 mintwini.kr 823
61.78.36.26 webgood.co.kr 795
61.78.36.27 webgood.co.kr 792
61.78.36.45 gsbshop.com 790
61.78.36.44 uvprinting.kr 786
61.78.36.29 infuni.kr 783
61.78.36.28 jbutton.co.kr 782
61.78.36.47 leadingtrust.com 780
61.78.36.46 leadingtrust.com 775
61.78.36.43 the-kafka.com 734
61.78.36.42 johnpick.co.kr 718
61.78.75.248 bnwcontest.kr 222
61.78.62.142 fie-forum.or.kr 48
61.74.156.125 orientalmyeongdong.com 48
61.78.36.51 luxnine.com.cn 44
61.78.36.56 tcoa.co.kr 44
61.78.75.238 koreaedugroup.com 42

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

267,032 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address ASN Details
61.75.172.225 AS4766 Korea Telecom 6.59ms from Seoul, KR
61.76.7.254 AS4766 Korea Telecom 7.32ms from Seoul, KR
61.75.151.81 AS4766 Korea Telecom 7.35ms from Seoul, KR
61.75.156.94 AS4766 Korea Telecom 6.86ms from Seoul, KR
61.75.90.103 AS4766 Korea Telecom 1.73ms from Seoul, KR
61.75.217.242 AS4766 Korea Telecom 6.34ms from Seoul, KR
61.75.229.81 AS4766 Korea Telecom 6.70ms from Seoul, KR
61.76.9.217 AS4766 Korea Telecom 6.36ms from Seoul, KR
61.75.97.129 AS4766 Korea Telecom 6.38ms from Seoul, KR
61.76.2.178 AS4766 Korea Telecom 6.38ms from Seoul, KR
61.75.93.249 AS4766 Korea Telecom 0.99ms from Seoul, KR
61.75.103.238 AS4766 Korea Telecom 6.48ms from Seoul, KR
61.75.170.16 AS4766 Korea Telecom 7.38ms from Seoul, KR
61.75.232.246 AS4766 Korea Telecom 7.21ms from Seoul, KR
61.75.191.65 AS4766 Korea Telecom 6.59ms from Seoul, KR
61.75.89.85 AS4766 Korea Telecom 1.08ms from Seoul, KR
61.75.220.77 AS4766 Korea Telecom 6.27ms from Seoul, KR
61.75.161.162 AS4766 Korea Telecom 6.22ms from Seoul, KR
61.75.99.126 AS4766 Korea Telecom 6.25ms from Seoul, KR
61.75.163.147 AS4766 Korea Telecom 6.67ms from Seoul, KR
61.75.244.209 AS4766 Korea Telecom 7.54ms from Seoul, KR
61.75.91.221 AS4766 Korea Telecom 1.38ms from Seoul, KR
61.75.222.166 AS4766 Korea Telecom 7.27ms from Seoul, KR
61.75.112.146 AS4766 Korea Telecom 6.07ms from Seoul, KR
61.76.10.224 AS4766 Korea Telecom 6.77ms 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
54.90.42.125 AS14618 Amazon.com, Inc. 0.67ms from Ashburn, US
199.168.88.221 AS54054 Deteque 0.27ms from Ashburn, US
98.32.212.189 AS7922 Comcast Cable Communications, LLC 5.68ms from Chicago, US
24.210.129.13 AS10796 Charter Communications Inc 8.94ms from Columbus, US
38.48.73.157 AS26375 AIRESPRING, INC. 0.57ms from Dallas, US
97.154.219.221 AS6167 Verizon Business 12.67ms from Dallas, US
91.22.157.141 AS3320 Deutsche Telekom AG 5.92ms from Frankfurt am Main, DE
110.6.124.61 AS4837 CHINA UNICOM China169 Backbone 15.19ms from Harbin, CN
222.221.247.141 AS4134 CHINANET-BACKBONE 1.01ms from Kunming, CN
86.151.126.13 AS2856 British Telecommunications PLC 6.04ms from London, GB
20.11.170.45 AS8075 Microsoft Corporation 0.41ms from Melbourne, AU
67.171.150.253 AS7922 Comcast Cable Communications, LLC 6.24ms from Portland, US
192.188.48.253 AS61468 CEDIA 7.59ms from Quito, EC
115.5.4.237 AS4766 Korea Telecom 1.83ms from Seoul, KR
104.103.109.205 AS16625 Akamai Technologies, Inc. 0.12ms from Vienna, AT
98.90.13.45 AS14618 Amazon.com, Inc. 0.63ms from Ashburn, US
66.39.182.29 AS27008 BendTel 0.77ms from Bend, US
3.162.79.77 AS16509 Amazon.com, Inc. 0.24ms from Berlin, DE
216.68.248.189 AS6181 Cincinnati Bell Telephone Company LLC 0.57ms from Cincinnati, US
96.217.57.141 AS7922 Comcast Cable Communications, LLC 1.11ms from Denver, US
212.202.159.13 AS20676 Plusnet GmbH 1.42ms from Duesseldorf, DE
63.176.77.125 AS16509 Amazon.com, Inc. 0.27ms from Frankfurt am Main, DE
93.220.38.45 AS3320 Deutsche Telekom AG 2.35ms from Frankfurt am Main, DE
219.129.251.77 AS4134 CHINANET-BACKBONE 7.87ms from Guangzhou, CN
154.194.130.253 AS139880 OWGELS INTERNATIONAL CO., LIMITED 0.50ms from Hong Kong, HK

Traceroute

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

$
traceroute -a -n -q1 -f3 -m8 61.78.37.236
traceroute to 61.78.37.236 (61.78.37.236): 8 hops max, 52 byte packets
3 [] 193.239.118.191 159.663 ms
4 *
5 [AS4766] 112.174.80.57 218.793 ms
6 *
7 *
8 *
Measurement taken from IPinfo ProbeNet in Roosendaal, NL
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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