123.99.100.0/24

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 123.99.100.0/24

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

Nearby Ranges

BGP prefixes that overlap with 123.99.0.0/16

Range	ASN	Company	Num of IPs
123.99.64.0/18	AS17857	SK Broadband Co Ltd	16,384
123.99.192.0/18	AS58461	Room 1405, Star building, No. 669 Jiefang Avenue,	16,384

Hosted domains

There is 1 domain name hosted across 1 IP address on this ASN. Checkout our API to access full domain hosting information.

IP Address	Domain	Domains on this IP
123.99.100.4	lkhnas.shop	1

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

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

IP Address	ASN	Details
123.99.100.1	AS17857 SK Broadband Co Ltd	`8.07ms` 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
45.148.145.88	AS208949 HBING LIMITED	`0.41ms` from Amsterdam, NL
23.47.254.72	AS16625 Akamai Technologies, Inc.	`0.17ms` from Chennai, IN
98.222.254.72	AS7922 Comcast Cable Communications, LLC	`5.37ms` from Chicago, US
122.174.29.216	AS24560 Bharti Airtel Ltd., Telemedia Services	`16.16ms` from Kolkata, IN
23.205.196.232	AS16625 Akamai Technologies, Inc.	`0.14ms` from Los Angeles, US
34.14.150.8	AS396982 Google LLC	`0.10ms` from Mumbai, IN
176.181.153.56	AS5410 Bouygues Telecom SA	`4.94ms` from Paris, FR
187.207.179.88	AS8151 UNINET	`11.43ms` from Santiago de Queretaro, MX
118.46.254.88	AS4766 Korea Telecom	`5.79ms` from Seoul, KR
115.198.215.248	AS4134 CHINANET-BACKBONE	`10.13ms` from Shanghai, CN
152.42.202.200	AS14061 DigitalOcean, LLC	`0.21ms` from Singapore, SG
103.204.229.40	AS58922 Fujifilm Microchannel Hosting Pty Ltd	`1.13ms` from Sydney, AU
183.189.251.168	AS4837 CHINA UNICOM China169 Backbone	`10.58ms` from Taiyuan, CN
60.153.83.40	AS17676 SoftBank Corp.	`3.53ms` from Tokyo, JP
171.80.251.184	AS4134 CHINANET-BACKBONE	`6.27ms` from Wuhan, CN
218.207.164.232	AS9808 China Mobile Communications Group Co., Ltd.	`4.01ms` from Xiamen, CN
178.192.210.136	AS3303 Swisscom (Switzerland) Ltd	`1.41ms` from Zuerich, CH
117.98.134.152	AS24560 Bharti Airtel Ltd., Telemedia Services	`3.24ms` from Ahmedabad, IN
148.153.180.200	AS63199 CDS Global Cloud Co., Ltd	`0.27ms` from Ashburn, US
41.141.18.216	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`8.40ms` from Casablanca, MA
69.232.35.40	AS7018 AT&T Enterprises, LLC	`4.80ms` from Durham, US
23.179.56.8	AS8095 LightStack Global LLC	`0.32ms` from Hong Kong, HK
39.27.196.184	AS4766 Korea Telecom	`1.98ms` from Incheon, KR
196.39.121.40	AS20011 Dimension Data	`2.38ms` from Johannesburg, ZA
41.192.205.8	AS29975 Vodacom	`14.48ms` from Johannesburg, ZA

Traceroute

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

traceroute -a -n -q1 -f5 123.99.100.110

traceroute to 123.99.100.110 (123.99.100.110): 64 hops max, 52 byte packets

5 [AS4637] 210.176.150.116 1.605 ms

6 [AS9318] 1.255.14.108 1.067 ms

7 *

8 *

9 *

10 *

11 [AS17857] 123.99.100.110 8.77 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On January 19th 2026

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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