121.254.20.0/24

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

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

IP Address	ASN	Details
121.254.20.1	AS23563 SK Broadband Co Ltd	`1.43ms` 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
83.244.57.120	AS12975 PALTEL Autonomous System	`18.63ms` from Amman, JO
1.1.162.200	AS23969 TOT Public Company Limited	`12.53ms` from Bangkok, TH
50.122.32.40	AS5650 Frontier Communications of America, Inc.	`9.03ms` from Chicago, US
20.52.243.24	AS8075 Microsoft Corporation	`0.19ms` from Frankfurt am Main, DE
112.92.27.8	AS17816 China Unicom IP network China169 Guangdong province	`10.92ms` from Guangzhou, CN
113.184.157.200	AS45899 VNPT Corp	`2.29ms` from Ho Chi Minh City, VN
104.21.30.24	AS13335 Cloudflare, Inc.	`0.14ms` from Johannesburg, ZA
113.233.113.200	AS4837 CHINA UNICOM China169 Backbone	`14.09ms` from Liaoyang, CN
135.180.249.40	AS46375 Sonic Telecom LLC	`1.75ms` from San Jose, US
23.2.67.232	AS16625 Akamai Technologies, Inc.	`0.26ms` from Warsaw, PL
46.229.96.168	AS12668 LLC KomTehCentr	`0.76ms` from Yekaterinburg, RU
104.85.13.72	AS16625 Akamai Technologies, Inc.	`0.11ms` from Bucharest, RO
209.59.154.232	AS32244 Liquid Web, L.L.C	`0.14ms` from Lansing, US
217.43.236.88	AS2856 British Telecommunications PLC	`3.25ms` from London, GB
129.122.227.56	AS37645 Finstar - Sociedade de Investimento e Participacoes S.A	`2.96ms` from Luanda, AO
69.207.119.104	AS11351 Charter Communications Inc	`15.89ms` from New York City, US
141.150.142.216	AS701 Verizon Business	`1.78ms` from New York City, US
173.169.158.24	AS33363 Charter Communications, Inc	`12.34ms` from Orlando, US
201.146.22.120	AS8151 UNINET	`11.07ms` from Phoenix, US
198.141.97.248	AS2571 DHL Information Services (Europe) s.r.o	`0.76ms` from Prague, CZ
128.83.161.72	AS18 University of Texas at Austin	`5.03ms` from San Antonio, US
14.75.110.40	AS4766 Korea Telecom	`7.57ms` from Seoul, KR
125.145.155.24	AS4766 Korea Telecom	`1.28ms` from Seoul, KR
185.145.143.136	AS59494 Enigma Telecom Ltd.	`10.94ms` from Stockholm, SE
111.242.53.168	AS3462 Data Communication Business Group	`5.81ms` from Taichung, TW

Traceroute

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

traceroute -a -n -q1 -f4 121.254.20.112

traceroute to 121.254.20.112 (121.254.20.112): 64 hops max, 52 byte packets

4 [AS9498] 116.119.44.134 200.41 ms

5 [] 206.72.210.167 199.581 ms

6 *

7 *

8 *

9 *

10 *

11 *

12 [AS23563] 121.254.20.112 217.103 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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