121.254.18.0/23

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

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

IP Address	ASN	Details
121.254.18.1	AS23563 SK Broadband Co Ltd	`1.43ms` from Seoul, KR
121.254.19.1	AS23563 SK Broadband Co Ltd	`1.48ms` 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
172.208.44.7	AS8075 Microsoft Corporation	`0.81ms` from Ashburn, US
101.200.108.247	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.37ms` from Beijing, CN
3.20.123.55	AS16509 Amazon.com, Inc.	`7.79ms` from Chicago, US
156.251.33.231	AS399077 Tcloudnet	`1.65ms` from Hong Kong, HK
218.246.191.71	AS17968 Daqing zhongji petroleum telecommunication construction limited cpmpany	`16.69ms` from Liaoyang, CN
47.138.237.119	AS5650 Frontier Communications of America, Inc.	`5.94ms` from Los Angeles, US
196.119.81.55	AS36925 MEDITELECOM	`15.22ms` from Madrid, ES
112.122.157.135	AS4837 CHINA UNICOM China169 Backbone	`3.17ms` from Nanjing, CN
125.251.126.119	AS17858 LG POWERCOMM	`7.69ms` from Seoul, KR
18.140.152.71	AS16509 Amazon.com, Inc.	`0.13ms` from Singapore, SG
36.83.18.39	AS7713 PT Telekomunikasi Indonesia	`7.67ms` from Surabaya, ID
176.231.97.247	AS12400 Partner Communications Ltd.	`1.81ms` from Tel Aviv, IL
159.27.27.183	AS58593 Shanghai Blue Cloud Technology Co.,Ltd	`5.91ms` from Beijing, CN
109.50.236.151	AS2860 NOS COMUNICACOES, S.A.	`2.07ms` from Braga, PT
58.96.54.103	AS10143 Exetel Pty Ltd	`1.05ms` from Brisbane, AU
69.132.254.231	AS11426 Charter Communications Inc	`7.95ms` from Charlotte, US
34.247.160.215	AS16509 Amazon.com, Inc.	`0.40ms` from Dublin, IE
61.154.239.7	AS4134 CHINANET-BACKBONE	`4.11ms` from Fuzhou, CN
91.179.63.183	AS5432 Proximus NV	`3.78ms` from Gravelines, FR
18.67.168.103	AS16509 Amazon.com, Inc.	`0.70ms` from Jakarta, ID
75.229.58.119	AS6167 Verizon Business	`18.39ms` from Miami, US
3.6.113.119	AS16509 Amazon.com, Inc.	`0.12ms` from Mumbai, IN
5.129.131.151	AS31200 Novotelecom Ltd	`1.31ms` from Novosibirsk, RU
210.231.38.7	AS4725 SoftBank Corp.	`15.59ms` from Osaka, JP
54.167.77.23	AS14618 Amazon.com, Inc.	`0.21ms` from Reston, US

Traceroute

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

traceroute -a -n -q1 -f5 121.254.18.71

traceroute to 121.254.18.71 (121.254.18.71): 64 hops max, 52 byte packets

5 [AS9318] 110.9.3.45 2.398 ms

6 *

7 *

8 *

9 *

10 [AS23563] 121.254.18.71 7.98 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

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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