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
51.136.35.184	AS8075 Microsoft Corporation	`0.21ms` from Amsterdam, NL
186.89.176.120	AS8048 CANTV Servicios, Venezuela	`8.27ms` from Caracas, VE
65.27.84.40	AS10796 Charter Communications Inc	`8.77ms` from Chicago, US
187.69.151.24	AS22085 Claro S/A	`18.60ms` from Curitiba, BR
47.185.104.120	AS5650 Frontier Communications of America, Inc.	`1.35ms` from Dallas, US
130.233.242.136	AS15496 Aalto University	`0.69ms` from Helsinki, FI
88.102.157.184	AS5610 O2 Czech Republic, a.s.	`3.53ms` from Prague, CZ
187.64.142.8	AS28573 Claro NXT Telecomunicacoes Ltda	`8.98ms` from Rio de Janeiro, BR
176.214.59.232	AS56330 JSC "ER-Telecom Holding"	`14.59ms` from Samara, RU
181.37.230.248	AS28118 ALTICE DOMINICANA S.A.	`9.57ms` from Santo Domingo, DO
120.51.85.40	AS2519 ARTERIA Networks Corporation	`7.79ms` from Tokyo, JP
113.141.54.248	AS4134 CHINANET-BACKBONE	`5.47ms` from Xi'an, CN
213.173.59.216	AS41960 Nextpertise	`11.13ms` from Amsterdam, NL
40.71.188.232	AS8075 Microsoft Corporation	`0.41ms` from Ashburn, US
20.190.249.152	AS8075 Microsoft Corporation	`0.18ms` from Boydton, US
20.98.12.136	AS8075 Microsoft Corporation	`0.73ms` from Chicago, US
188.151.185.152	AS1257 Tele2 Sverige AB	`2.04ms` from Copenhagen, DK
34.59.187.216	AS396982 Google LLC	`0.12ms` from Council Bluffs, US
207.126.112.136	AS18707 Intelemedia Communications, Inc	`1.49ms` from Dallas, US
162.144.93.72	AS46606 Unified Layer	`1.73ms` from Draper, US
5.56.249.216	AS3209 Vodafone GmbH	`12.88ms` from Frankfurt am Main, DE
141.58.123.24	AS553 BelWue-Koordination	`3.81ms` from Frankfurt am Main, DE
154.218.163.216	AS137951 ASLINE LIMITED	`0.74ms` from Hong Kong, HK
123.176.149.8	AS17939 miyazaki cabletelevision network Co.,LTD	`18.07ms` from Osaka, JP
56.124.37.24	AS16509 Amazon.com, Inc.	`0.17ms` from Osasco, BR

Traceroute

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

traceroute -a -n -q1 -f3 -m17 210.121.136.141

traceroute to 210.121.136.141 (210.121.136.141): 17 hops max, 52 byte packets

3 [AS9002] 87.245.227.86 27.491 ms

4 *

5 [] 80.81.193.16 28.521 ms

6 *

7 *

8 *

9 *

10 [AS3786] 1.208.107.190 205.556 ms

11 [AS3786] 1.208.141.26 210.847 ms

12 [AS3786] 118.128.27.234 206.256 ms

13 [AS55627] 210.121.137.5 206.952 ms

14 [AS55627] 210.121.137.4 205.22 ms

15 *

16 *

17 *

Measurement taken from

IPinfo ProbeNet in Riga, LV

On January 30th 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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