210.121.156.0/24

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:        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 210.121.156.0/24

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

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

IP Address	ASN	Details
210.121.156.131	AS18176 KOOKMIN UNIVERSITY	`1.97ms` 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
172.210.161.248	AS8075 Microsoft Corporation	`0.15ms` from Boydton, US
62.67.222.40	AS3356 Level 3 Parent, LLC	`0.66ms` from Frankfurt am Main, DE
14.249.139.104	AS45899 VNPT Corp	`2.44ms` from Hanoi, VN
112.184.149.216	AS4766 Korea Telecom	`2.79ms` from Incheon, KR
211.58.123.24	AS9318 SK Broadband Co Ltd	`0.90ms` from Incheon, KR
5.48.52.56	AS5410 Bouygues Telecom SA	`7.29ms` from Marseille, FR
178.122.98.248	AS6697 Republican Unitary Telecommunication Enterprise Beltelecom	`6.51ms` from Minsk, BY
3.7.96.200	AS16509 Amazon.com, Inc.	`0.10ms` from Mumbai, IN
173.198.197.248	AS40244 Turnkey Internet Inc.	`3.69ms` from New York City, US
79.217.92.248	AS3320 Deutsche Telekom AG	`4.35ms` from Nuernberg, DE
101.142.196.72	AS17511 OPTAGE Inc.	`2.76ms` from Osaka, JP
119.231.68.248	AS17511 OPTAGE Inc.	`1.90ms` from Osaka, JP
86.213.60.72	AS3215 Orange S.A.	`13.46ms` from Paris, FR
4.212.244.216	AS8075 Microsoft Corporation	`0.15ms` from Paris, FR
71.238.98.184	AS7922 Comcast Cable Communications, LLC	`4.19ms` from Portland, US
148.153.196.24	AS63199 CDS Global Cloud Co., Ltd	`0.68ms` from Singapore, SG
93.82.156.200	AS8447 A1 Telekom Austria AG	`11.18ms` from Vienna, AT
43.192.163.248	AS135629 Ningxia West Cloud Data Technology Co.Ltd.	`0.79ms` from Zhongwei, CN
2.50.132.152	AS5384 Emirates Internet	`8.19ms` from Al Fujairah City, AE
23.222.0.216	AS20940 Akamai International B.V.	`0.17ms` from Ashburn, US
157.181.0.248	AS2012 ELTENET	`0.39ms` from Budapest, HU
190.49.50.72	AS22927 Telefonica de Argentina	`1.89ms` from Buenos Aires, AR
98.209.121.8	AS7922 Comcast Cable Communications, LLC	`6.06ms` from Flint, US
220.120.52.24	AS4766 Korea Telecom	`1.36ms` from Incheon, KR
203.246.33.24	AS9318 SK Broadband Co Ltd	`1.44ms` from Incheon, KR

Traceroute

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

traceroute -a -n -q1 -m4 210.121.156.17

traceroute to 210.121.156.17 (210.121.156.17): 4 hops max, 52 byte packets

1 [AS199524] 82.117.226.1 0.117 ms

2 *

3 *

4 *

Measurement taken from

IPinfo ProbeNet in Incheon, KR

On March 13th 2026

What are IP address ranges?

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