123.99.110.0/23

AS17857 · SK Broadband Co Ltd

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Summary

Country	South Korea
Domain	skbroadband.com
ASN	AS17857
Parent Range	123.99.64.0/18
Registry	APNIC
ID	TBROAD

WHOIS Details

inetnum:        123.99.64.0 - 123.99.127.255
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:        123.99.64.0 - 123.99.127.255
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

Overlapping Ranges

BGP prefixes that contain 123.99.110.0/23

Range	ASN	Company	Num of IPs
123.99.64.0/18	AS17857	SK Broadband Co Ltd	16,384

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

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

IP Address	ASN	Details
123.99.110.1	AS17857 SK Broadband Co Ltd	`7.64ms` from Seoul, KR
123.99.111.1	AS17857 SK Broadband Co Ltd	`8.03ms` 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
172.211.135.7	AS8075 Microsoft Corporation	`0.27ms` from Amsterdam, NL
2.84.251.103	AS6799 Ote SA (Hellenic Telecommunications Organisation)	`9.17ms` from Athens, GR
192.178.245.215	AS15169 Google LLC	`0.21ms` from Denver, US
156.51.217.231	AS3301 Telia Company AB	`8.09ms` from Goeteborg, SE
213.30.41.231	AS12353 Vodafone Portugal	`0.58ms` from Lisbon, PT
79.168.53.135	AS2860 NOS COMUNICACOES, S.A.	`4.91ms` from Lisbon, PT
75.46.187.87	AS7018 AT&T Enterprises, LLC	`18.67ms` from Los Angeles, US
121.180.55.119	AS4766 Korea Telecom	`6.88ms` from Seoul, KR
61.175.18.231	AS4134 CHINANET-BACKBONE	`6.33ms` from Shanghai, CN
49.176.179.71	AS4804 Microplex PTY LTD	`1.83ms` from Sydney, AU
180.22.90.103	AS4713 NTT Communications Corporation	`17.48ms` from Tokyo, JP
172.211.252.55	AS8075 Microsoft Corporation	`1.36ms` from Amsterdam, NL
20.31.147.247	AS8075 Microsoft Corporation	`0.22ms` from Amsterdam, NL
75.211.56.183	AS6167 Verizon Business	`15.99ms` from Chicago, US
27.147.215.151	AS23688 Link3 Technologies Ltd.	`0.59ms` from Dhaka, BD
18.157.174.231	AS16509 Amazon.com, Inc.	`0.26ms` from Frankfurt am Main, DE
2.166.40.167	AS3320 Deutsche Telekom AG	`15.00ms` from Hamburg, DE
154.216.65.135	AS132839 POWER LINE DATACENTER	`1.06ms` from Hong Kong, HK
84.44.15.247	AS15924 Vodafone Net Iletisim Hizmetler AS	`1.43ms` from Istanbul, TR
86.138.36.55	AS2856 British Telecommunications PLC	`3.84ms` from London, GB
64.173.94.199	AS7018 AT&T Enterprises, LLC	`2.37ms` from Los Angeles, US
23.43.233.151	AS16625 Akamai Technologies, Inc.	`0.46ms` from Miami, US
24.228.111.7	AS6128 Cablevision Systems Corp.	`5.99ms` from New York City, US
121.82.143.119	AS17511 OPTAGE Inc.	`1.61ms` from Osaka, JP
124.96.68.167	AS4713 NTT Communications Corporation	`3.03ms` from Osaka, JP

Traceroute

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

traceroute -a -n -q1 -f3 123.99.111.209

traceroute to 123.99.111.209 (123.99.111.209): 64 hops max, 52 byte packets

3 [] 206.72.210.167 0.724 ms

4 *

5 *

6 *

7 *

8 *

9 *

10 [AS17857] 123.99.111.209 145.683 ms

Measurement taken from

IPinfo ProbeNet in Los Angeles, US

On September 11th 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.

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