210.121.136.0/24

AS55627 · Dongduk Womens University

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Summary

Country	South Korea
Domain	kt.com
ASN	AS55627
Parent Range	210.121.128.0/17
Registry	KRNIC
ID	KORNET-KR

WHOIS Details

inetnum:        210.121.128.0 - 210.121.255.255
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
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:        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 contain 210.121.136.0/24

Range	ASN	Company	Num of IPs
210.121.128.0/17	AS38676	Korea Telecom	32,768
210.121.128.0/17	AS152290	Korea Telecom	32,768
210.121.128.0/17	AS18176	Korea Telecom	32,768
210.121.128.0/17	AS10058	Korea Telecom	32,768
210.121.128.0/17	AS55627	Korea Telecom	32,768
210.121.128.0/17	AS4766	Korea Telecom	32,768

Nearby Ranges

BGP prefixes that overlap with 210.121.0.0/16

Range	ASN	Company	Num of IPs
210.121.128.0/17	AS10058	Korea Telecom	32,768
210.121.128.0/17	AS152290	Korea Telecom	32,768
210.121.128.0/17	AS18176	Korea Telecom	32,768
210.121.128.0/17	AS38676	Korea Telecom	32,768
210.121.0.0/17	AS45374	SEJONG NETWORKS	32,768
210.121.128.0/17	AS4766	Korea Telecom	32,768
210.121.128.0/17	AS55627	Korea Telecom	32,768
210.121.0.0/17	AS9848	SEJONG NETWORKS	32,768

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
216.245.97.248	AS55120 Tallahatchie Valley Internet Services, LLC	`12.93ms` from Atlanta, US
44.224.48.200	AS16509 Amazon.com, Inc.	`0.21ms` from Boardman, US
43.141.192.40	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.28ms` from Chengdu, CN
75.213.155.8	AS6167 Verizon Business	`16.75ms` from Chicago, US
169.59.210.168	AS36351 IBM Cloud	`1.02ms` from Dallas, US
111.124.205.136	AS4134 CHINANET-BACKBONE	`1.68ms` from Guiyang, CN
73.232.152.24	AS7922 Comcast Cable Communications, LLC	`4.13ms` from Houston, US
85.62.13.136	AS12479 Orange Espagne SA	`0.61ms` from Madrid, ES
101.182.14.104	AS1221 Telstra Limited	`8.02ms` from Melbourne, AU
108.212.66.200	AS7018 AT&T Enterprises, LLC	`16.67ms` from San Jose, US
73.225.147.56	AS7922 Comcast Cable Communications, LLC	`3.92ms` from Seattle, US
47.106.172.56	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`1.55ms` from Shenzhen, CN
219.134.187.56	AS4134 CHINANET-BACKBONE	`0.86ms` from Shenzhen, CN
64.228.62.152	AS577 Bell Canada	`6.14ms` from Toronto, CA
193.227.41.200	AS2561 Egyptian Universities Network (EUN)	`8.69ms` from Cairo, EG
34.55.79.8	AS396982 Google LLC	`0.10ms` from Council Bluffs, US
113.165.121.232	AS45899 VNPT Corp	`9.95ms` from Da Nang, VN
1.54.132.104	AS18403 FPT Telecom Company	`9.50ms` from Hanoi, VN
117.68.36.120	AS134425 China Telecom	`6.09ms` from Huai'an, CN
66.33.43.104	AS31875 Jackson County Rural Electric Membership Corporation	`4.12ms` from Indianapolis, US
84.201.160.216	AS200350 Yandex.Cloud LLC	`2.96ms` from Moscow, RU
173.72.12.24	AS701 Verizon Business	`4.49ms` from New York City, US
203.189.34.200	AS4685 Asahi Net	`5.73ms` from Osaka, JP
169.155.48.184	AS40509 Fly.io, Inc.	`0.10ms` from Osasco, BR
203.59.111.168	AS7545 TPG Telecom Limited	`1.87ms` from Perth, AU

Traceroute

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

traceroute -a -n -q1 -m13 210.121.136.48

traceroute to 210.121.136.48 (210.121.136.48): 13 hops max, 52 byte packets

1 [AS15169] 72.14.239.92 247.967 ms

2 *

3 [AS3786] 1.208.178.181 285.603 ms

4 *

5 *

6 *

7 [AS3786] 1.208.107.190 300.893 ms

8 [AS3786] 1.213.141.10 278.318 ms

9 [AS3786] 118.128.27.234 291.389 ms

10 [AS55627] 210.121.137.5 285.264 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Madrid, ES

On January 9th 2026

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.

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