210.121.209.0/24

AS152290 · Jejuair

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Summary

Country	South Korea
Domain	kt.com
ASN	AS152290
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 210.121.209.0/24

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
210.121.209.37	AS152290 Jejuair	`0.79ms` 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
108.142.12.232	AS8075 Microsoft Corporation	`0.22ms` from Amsterdam, NL
172.74.70.8	AS11426 Charter Communications Inc	`10.89ms` from Ashburn, US
35.81.225.168	AS16509 Amazon.com, Inc.	`0.17ms` from Boardman, US
35.90.70.24	AS16509 Amazon.com, Inc.	`0.57ms` from Boardman, US
191.111.218.184	AS3816 COLOMBIA TELECOMUNICACIONES S.A. ESP BIC	`9.77ms` from Bogota, CO
35.242.64.88	AS396982 Google LLC	`0.14ms` from Brussels, BE
50.96.220.168	AS7029 Windstream Communications LLC	`17.76ms` from Chicago, US
173.88.12.136	AS10796 Charter Communications Inc	`15.89ms` from Columbus, US
71.88.153.72	AS20115 Charter Communications LLC	`17.57ms` from Dallas, US
123.21.175.120	AS45899 VNPT Corp	`1.49ms` from Ho Chi Minh City, VN
223.16.199.56	AS9304 HGC Global Communications Limited	`1.34ms` from Hong Kong, HK
70.114.9.216	AS11427 Charter Communications Inc	`8.10ms` from Houston, US
96.41.74.88	AS20115 Charter Communications LLC	`3.69ms` from Los Angeles, US
16.26.231.216	AS16509 Amazon.com, Inc.	`0.66ms` from Melbourne, AU
207.171.228.8	AS32890 Beehive Telephone Company, Inc.	`7.52ms` from Salt Lake City, US
172.207.45.120	AS8075 Microsoft Corporation	`1.31ms` from Tokyo, JP
185.15.2.232	AS199475 Mazowieckie Sieci Swiatlowodowe sp. z o.o.	`0.46ms` from Warsaw, PL
222.143.137.72	AS4837 CHINA UNICOM China169 Backbone	`5.12ms` from Zhengzhou, CN
89.35.127.248	AS39572 DataWeb Global Group B.V.	`0.65ms` from Amsterdam, NL
51.144.170.24	AS8075 Microsoft Corporation	`0.23ms` from Amsterdam, NL
187.213.235.24	AS8151 UNINET	`1.05ms` from Guadalajara, MX
49.156.6.8	AS24251 Iwakuni Cable Network Corporation	`1.48ms` from Hiroshima, JP
16.60.4.104	AS16509 Amazon.com, Inc.	`0.15ms` from London, GB
82.15.15.152	AS5089 Virgin Media Limited	`6.53ms` from London, GB
47.150.114.8	AS5650 Frontier Communications of America, Inc.	`3.10ms` from Los Angeles, US

Traceroute

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

traceroute -a -n -q1 210.121.209.52

traceroute to 210.121.209.52 (210.121.209.52): 64 hops max, 52 byte packets

1 [AS31898] 140.91.214.45 0.068 ms

2 *

3 *

4 *

5 [AS4766] 112.174.120.206 0.887 ms

6 *

7 [AS4766] 14.36.200.102 1.3 ms

8 [AS152290] 220.76.194.250 1.221 ms

9 [AS152290] 210.121.209.52 1.002 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On March 21st 2026

What are IP address ranges?

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