121.254.54.0/23

AS23563 · SK Broadband Co Ltd

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Summary

Country	South Korea
Domain	skbroadband.com
ASN	AS23563
Registry	APNIC
ID	TBROAD

WHOIS Details

inetnum:        121.254.0.0 - 121.254.63.255
netname:        broadNnet
descr:          SK Broadband Co Ltd
country:        KR
admin-c:        IM670-AP
tech-c:         IM670-AP
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2020-12-29T05:46:12Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        Jeollanam-do Naju-si Jinheung-gil
e-mail:         irt@nic.or.kr
abuse-mailbox:  irt@nic.or.kr
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        irt@nic.or.kr was validated on 2020-04-09
mnt-by:         MNT-KRNIC-AP
last-modified:  2021-06-15T06:21:49Z
source:         APNIC

person:         IP Manager
address:        Seoul Jung-gu Toegye-ro 24
country:        KR
phone:          +82-80-828-2106
e-mail:         ip-adm@skbroadband.com
nic-hdl:        IM670-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2021-10-05T05:20:03Z
source:         APNIC

inetnum:        121.254.0.0 - 121.254.63.255
netname:        broadNnet-KR
descr:          SK Broadband Co Ltd
country:        KR
admin-c:        IM12-KR
tech-c:         IM12-KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
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.
changed:        hostmaster@nic.or.kr
source:         KRNIC

person:         IP Manager
address:        Seoul Jung-gu Toegye-ro 24
address:        SK Namsan Green Bldg.
country:        KR
phone:          +82-80-828-2106
e-mail:         ip-adm@skbroadband.com
nic-hdl:        IM12-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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Useful for Cybersecurity

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Pingable IPs

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

IP Address	ASN	Details
121.254.54.1	AS23563 SK Broadband Co Ltd	`1.67ms` from Seoul, KR
121.254.55.1	AS23563 SK Broadband Co Ltd	`1.51ms` 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
89.180.17.71	AS2860 NOS COMUNICACOES, S.A.	`2.54ms` from Braga, PT
141.81.184.151	AS2687 AT&T Enterprises, LLC	`0.76ms` from Chicago, US
143.89.72.103	AS3363 Hong Kong University of Science and Technology	`2.00ms` from Hong Kong, HK
76.153.108.55	AS7922 Comcast Cable Communications, LLC	`9.03ms` from Miami, US
79.13.121.119	AS3269 Telecom Italia S.p.A.	`4.24ms` from Milan, IT
182.59.51.135	AS17813 Mahanagar Telephone Nigam Limited	`3.04ms` from Mumbai, IN
202.144.71.135	AS9583 Sify Limited	`1.32ms` from Mumbai, IN
117.66.169.215	AS4134 CHINANET-BACKBONE	`10.71ms` from Nanchang, CN
113.17.92.55	AS4134 CHINANET-BACKBONE	`5.86ms` from Nanning, CN
54.208.163.247	AS14618 Amazon.com, Inc.	`0.19ms` from Reston, US
64.252.141.135	AS16509 Amazon.com, Inc.	`0.24ms` from Seattle, US
38.177.230.167	AS399195 PEG TECH INC	`0.23ms` from Seoul, KR
126.37.230.199	AS17676 SoftBank Corp.	`4.66ms` from Tokyo, JP
157.120.140.55	AS9604 FUJI SOFT INCORPORATED	`0.85ms` from Tokyo, JP
159.8.240.55	AS36351 IBM Cloud	`1.06ms` from Amsterdam, NL
40.71.200.231	AS8075 Microsoft Corporation	`0.39ms` from Ashburn, US
68.72.132.55	AS7018 AT&T Enterprises, LLC	`10.28ms` from Atlanta, US
92.224.192.39	AS6805 Telefonica Germany GmbH & Co.OHG	`1.64ms` from Berlin, DE
68.145.155.39	AS6327 Shaw Communications Inc.	`8.89ms` from Calgary, CA
212.211.137.167	AS12399 q.beyond AG	`0.86ms` from Frankfurt am Main, DE
109.138.127.103	AS5432 Proximus NV	`4.70ms` from Gravelines, FR
98.130.102.167	AS16509 Amazon.com, Inc.	`1.57ms` from Hyderabad, IN
80.245.115.87	AS6789 CRELCOM LLC	`7.39ms` from Krasnodar, RU
61.158.110.103	AS4837 CHINA UNICOM China169 Backbone	`16.33ms` from Liaoyang, CN
109.147.167.39	AS2856 British Telecommunications PLC	`3.56ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -f4 121.254.55.190

traceroute to 121.254.55.190 (121.254.55.190): 64 hops max, 52 byte packets

4 [AS9498] 116.119.44.136 212.487 ms

5 [] 206.72.210.167 207.846 ms

6 *

7 *

8 *

9 *

10 *

11 *

12 [AS23563] 121.254.55.190 238.571 ms

Measurement taken from

IPinfo ProbeNet in Chennai, IN

On August 28th 2025

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.

Traffic works its way around the internet based on the routing table, which contains a list of networks and their associated netblocks.

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