210.121.138.0/24

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:        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

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

Overlapping Ranges

BGP prefixes that contain 210.121.138.0/24

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

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

IP Address	ASN	Details
210.121.138.240	AS55627 Dongduk Womens University	`2.16ms` 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
167.17.44.120	AS5650 Frontier Communications of America, Inc.	`0.50ms` from Ashburn, US
121.24.17.216	AS4837 CHINA UNICOM China169 Backbone	`9.78ms` from Beijing, CN
154.220.200.184	AS136907 HUAWEI CLOUDS	`1.15ms` from Hong Kong, HK
174.176.2.136	AS7922 Comcast Cable Communications, LLC	`3.49ms` from Miami, US
88.57.195.88	AS3269 Telecom Italia S.p.A.	`3.69ms` from Milan, IT
90.49.155.184	AS3215 Orange S.A.	`10.20ms` from Paris, FR
189.115.234.200	AS18881 TELEFÔNICA BRASIL S.A	`1.02ms` from Rio de Janeiro, BR
178.71.207.72	AS12389 PJSC Rostelecom	`1.93ms` from Saint Petersburg, RU
201.26.63.88	AS27699 TELEFÔNICA BRASIL S.A	`6.72ms` from Sao Paulo, BR
23.101.21.88	AS8075 Microsoft Corporation	`0.61ms` from Singapore, SG
60.71.134.248	AS17676 SoftBank Corp.	`2.92ms` from Tokyo, JP
153.185.87.88	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.68ms` from Tokyo, JP
153.167.7.216	AS4713 NTT DOCOMO BUSINESS,Inc.	`2.89ms` from Tokyo, JP
119.96.157.216	AS58563 CHINANET Hubei province network	`0.28ms` from Wuhan, CN
38.179.21.40	AS15081 Omni Fiber	`4.04ms` from Columbus, US
66.128.61.88	AS7819 Global IP Networks INC	`0.89ms` from Dallas, US
212.56.81.24	AS6871 Plusnet	`4.15ms` from Erith, GB
93.199.69.152	AS3320 Deutsche Telekom AG	`6.03ms` from Frankfurt am Main, DE
47.110.9.152	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`5.79ms` from Hangzhou, CN
116.48.225.184	AS4760 HKT Limited	`8.15ms` from Hong Kong, HK
61.43.243.136	AS3786 LG DACOM Corporation	`1.26ms` from Incheon, KR
173.25.171.24	AS30036 Mediacom Communications Corp	`19.26ms` from Kansas City, US
148.63.14.248	AS12353 Vodafone Portugal	`2.61ms` from Lisbon, PT
79.147.182.120	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.62ms` from Madrid, ES
204.176.55.88	AS701 Verizon Business	`5.56ms` from New York City, US

Traceroute

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

traceroute -a -n -q1 210.121.138.251

traceroute to 210.121.138.251 (210.121.138.251): 64 hops max, 52 byte packets

1 [AS15169] 172.253.64.138 1.184 ms

2 [AS3786] 182.162.208.37 0.755 ms

3 *

4 [AS3786] 110.45.128.73 1.796 ms

5 [AS3786] 182.162.37.14 1.814 ms

6 *

7 *

8 *

9 *

10 [AS3786] 1.213.140.22 2.6 ms

11 *

12 [AS55627] 210.121.137.5 2.459 ms

13 [AS55627] 210.121.137.3 2.964 ms

14 *

15 [AS55627] 210.121.138.251 2.874 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 19th 2026

What are IP address ranges?

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