61.72.225.0/24

AS17841 · NATIONAL INFORMATION RESOURCES SERVICE

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Summary

Country	South Korea
Domain	kt.com
ASN	AS17841
Registry	APNIC
ID	KORNET

WHOIS Details

inetnum:        61.72.0.0 - 61.77.255.255
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:        61.72.0.0 - 61.77.255.255
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 61.72.0.0/16

No nearby ranges found.

Hosted domains

There are no domains currently hosted on this ASN.

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

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
97.204.223.8	AS6167 Verizon Business	`18.19ms` from Ashburn, US
138.88.91.120	AS701 Verizon Business	`2.22ms` from Ashburn, US
98.168.113.248	AS63182 RapidScale, Inc	`0.24ms` from Chicago, US
14.175.142.216	AS45899 VNPT Corp	`8.41ms` from Da Nang, VN
34.174.225.184	AS396982 Google LLC	`0.12ms` from Dallas, US
75.245.112.200	AS6167 Verizon Business	`17.12ms` from Denver, US
86.43.186.152	AS5466 Eircom Limited	`4.80ms` from Dublin, IE
99.24.231.8	AS7018 AT&T Enterprises, LLC	`3.13ms` from Los Angeles, US
191.94.30.72	AS27805 UNE EPM TELECOMUNICACIONES S.A.	`7.74ms` from Medellin, CO
189.154.117.72	AS8151 UNINET	`14.76ms` from Phoenix, US
192.9.160.136	AS31898 Oracle Corporation	`0.15ms` from Sydney, AU
177.62.101.72	AS26599 TELEFÔNICA BRASIL S.A	`9.59ms` from São Paulo, BR
197.9.136.200	AS327934 SOCIETE NATIONALE DES TELECOMMUNICATIONS (Tunisie Telecom)	`18.13ms` from Tunis, TN
39.98.9.136	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.53ms` from Zhangjiakou, CN
123.10.13.136	AS4837 CHINA UNICOM China169 Backbone	`7.62ms` from Zhengzhou, CN
63.43.209.232	AS6167 Verizon Business	`18.21ms` from Chicago, US
77.7.164.24	AS6805 Telefonica Germany GmbH & Co.OHG	`9.02ms` from Frankfurt am Main, DE
20.240.13.104	AS8075 Microsoft Corporation	`0.19ms` from Gaevle, SE
80.187.132.88	AS3320 Deutsche Telekom AG	`0.49ms` from Hamburg, DE
223.122.85.72	AS137872 China Mobile Hong Kong Company Limited	`2.40ms` from Hong Kong, HK
109.87.110.56	AS13188 CONTENT DELIVERY NETWORK LTD	`6.96ms` from Kharkiv, UA
199.36.199.168	AS12155 Henderson Municipal Power & Light	`7.33ms` from Louisville, US
64.254.111.8	AS19808 NTT Global Networks Incorporated	`0.35ms` from Miami, US
99.162.254.152	AS7018 AT&T Enterprises, LLC	`2.44ms` from Miami, US
82.164.182.184	AS2119 Telenor Norge AS	`9.99ms` from Oslo, NO

Traceroute

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

traceroute -a -n -q1 -f2 -m7 61.72.225.236

traceroute to 61.72.225.236 (61.72.225.236): 7 hops max, 52 byte packets

2 [AS23265] 206.126.16.197 36.68 ms

3 *

4 [] 206.81.81.160 8.542 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Walla Walla, US

On October 25th 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.

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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