123.99.78.0/23

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 123.99.78.0/23

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

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

IP Address	ASN	Details
123.99.79.1	AS17857 SK Broadband Co Ltd	`7.63ms` from Seoul, KR
123.99.78.1	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
5.79.125.199	AS60781 LeaseWeb Netherlands B.V.	`0.24ms` from Amsterdam, NL
100.6.81.71	AS701 Verizon Business	`6.60ms` from Ashburn, US
156.193.5.199	AS8452 TE-AS	`4.11ms` from Cairo, EG
66.56.231.215	AS11426 Charter Communications Inc	`12.68ms` from Charlotte, US
149.166.44.199	AS87 Indiana University	`4.02ms` from Chicago, US
164.47.125.7	AS14737 Colorado Community College and Occupational Education System	`3.50ms` from Denver, US
54.154.91.119	AS16509 Amazon.com, Inc.	`0.12ms` from Dublin, IE
27.58.233.55	AS24560 Bharti Airtel Ltd., Telemedia Services	`2.13ms` from Hyderabad, IN
160.178.178.87	AS36903 Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM	`17.69ms` from Lisbon, PT
18.175.105.55	AS16509 Amazon.com, Inc.	`0.16ms` from London, GB
73.90.41.119	AS7922 Comcast Cable Communications, LLC	`10.15ms` from Los Angeles, US
51.95.84.183	AS16509 Amazon.com, Inc.	`5.73ms` from Madrid, ES
107.77.223.151	AS20057 AT&T Enterprises, LLC	`0.68ms` from New York City, US
81.254.58.135	AS3215 Orange S.A.	`8.92ms` from Paris, FR
94.246.177.151	AS33923 ART-COM Sp. z o.o.	`6.60ms` from Poznan, PL
222.121.249.71	AS4766 Korea Telecom	`7.05ms` from Seoul, KR
14.81.219.119	AS4766 Korea Telecom	`5.36ms` from Seoul, KR
83.148.106.231	AS8866 Vivacom Bulgaria EAD	`2.36ms` from Sofia, BG
73.137.157.231	AS7922 Comcast Cable Communications, LLC	`4.22ms` from Atlanta, US
113.189.93.103	AS45899 VNPT Corp	`9.05ms` from Da Nang, VN
118.31.205.39	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`3.61ms` from Hangzhou, CN
115.238.110.55	AS4134 CHINANET-BACKBONE	`4.23ms` from Hangzhou, CN
43.198.153.39	AS16509 Amazon.com, Inc.	`0.12ms` from Hong Kong, HK
50.21.189.183	AS8560 IONOS SE	`0.43ms` from Lenexa, US
104.18.60.151	AS13335 Cloudflare, Inc.	`0.14ms` from Lima, PE

Traceroute

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

traceroute -a -n -q1 123.99.78.61

traceroute to 123.99.78.61 (123.99.78.61): 64 hops max, 52 byte packets

1 [AS31898] 140.91.230.12 0.077 ms

2 [AS9318] 39.120.201.122 0.529 ms

3 [AS9318] 39.120.201.121 3.462 ms

4 *

5 *

6 *

7 *

8 [AS17857] 123.99.78.61 14.346 ms

Measurement taken from

IPinfo ProbeNet in Chuncheon, KR

On September 11th 2025

What are IP address ranges?

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