210.121.158.0/24

AS18176 · KOOKMIN UNIVERSITY

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Summary

Country	South Korea
Domain	kt.com
ASN	AS18176
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:        [email protected] 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:         [email protected]
nic-hdl:        IM9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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:         [email protected]
nic-hdl:        IA9-KR
mnt-by:         MNT-KRNIC-AP
changed:        [email protected] 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 210.121.158.0/24

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

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

IP Address	ASN	Details
210.121.158.31	AS18176 KOOKMIN UNIVERSITY	`1.69ms` from Incheon, 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
77.160.251.40	AS1136 KPN B.V.	`1.20ms` from Amsterdam, NL
91.6.100.216	AS3320 Deutsche Telekom AG	`6.04ms` from Berlin, DE
59.180.169.200	AS17813 Mahanagar Telephone Nigam Limited	`1.77ms` from Delhi, IN
62.183.254.184	AS16086 DNA Oyj	`5.30ms` from Helsinki, FI
49.244.161.104	AS23752 Nepal Telecommunications Corporation, Internet Services,	`1.98ms` from Kathmandu, NP
188.76.149.200	AS12479 Orange Espagne SA	`1.32ms` from Madrid, ES
80.93.131.24	AS21056 Vianova S.p.A	`0.09ms` from Milan, IT
73.120.57.8	AS7922 Comcast Cable Communications, LLC	`18.04ms` from Murfreesboro, US
18.204.142.104	AS14618 Amazon.com, Inc.	`0.20ms` from Reston, US
13.125.116.184	AS16509 Amazon.com, Inc.	`0.15ms` from Seoul, KR
119.207.238.104	AS4766 Korea Telecom	`1.56ms` from Seoul, KR
211.25.18.104	AS9930 TTNET-MY	`1.30ms` from Sepang, MY
49.235.238.216	AS45090 Shenzhen Tencent Computer Systems Company Limited	`0.83ms` from Shanghai, CN
35.78.5.40	AS16509 Amazon.com, Inc.	`0.22ms` from Tokyo, JP
84.238.7.184	AS33796 BOLIGNET-AARHUS F.M.B.A.	`3.34ms` from Copenhagen, DK
39.102.232.200	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`0.99ms` from Hohhot, CN
121.125.80.72	AS9318 SK Broadband Co Ltd	`1.70ms` from Incheon, KR
212.170.18.168	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.36ms` from Madrid, ES
101.191.76.40	AS1221 Telstra Limited	`9.42ms` from Melbourne, AU
187.209.75.72	AS8151 UNINET	`10.45ms` from Monterrey, MX
121.127.37.8	AS50340 JSC Selectel	`0.69ms` from Moscow, RU
129.219.87.168	AS2900 Arizona Tri University Network	`0.92ms` from Phoenix, US
174.168.78.88	AS7922 Comcast Cable Communications, LLC	`9.84ms` from Providence, US
124.132.156.216	AS4837 CHINA UNICOM China169 Backbone	`9.40ms` from Qingdao, CN
20.230.148.200	AS8075 Microsoft Corporation	`0.31ms` from Quincy, US

Traceroute

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

traceroute -a -n -q1 210.121.158.92

traceroute to 210.121.158.92 (210.121.158.92): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.45 0.073 ms

2 [AS3786] 211.118.152.142 1.195 ms

3 *

4 *

5 *

6 *

7 [AS3786] 115.89.206.242 3.052 ms

8 *

9 [AS18176] 210.121.158.92 2.869 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 31st 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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