121.55.64.0/20

AS9781 · GREEN CABLE TELEVISION STATION

Need more data or want to access it via API or data downloads? Sign up to get free access

Summary

Country	South Korea
Domain	gcs.co.kr
ASN	AS9781
Parent Range	121.55.64.0/18
Registry	APNIC
ID	GCS

WHOIS Details

inetnum:        121.55.64.0 - 121.55.127.255
netname:        GCS
descr:          GREEN CABLE TELEVISION STATION
country:        KR
admin-c:        IM706-AP
tech-c:         IM706-AP
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2025-11-03T06:34:05Z
source:         APNIC

irt:            IRT-KRNIC-KR
address:        9, Jinheung-gil, Naju-si, Jeollanam-do
e-mail:         [email protected]
abuse-mailbox:  [email protected]
admin-c:        IM574-AP
tech-c:         IM574-AP
auth:           # Filtered
remarks:        [email protected] was validated on 2020-04-09
mnt-by:         MNT-KRNIC-AP
last-modified:  2025-09-04T01:00:01Z
source:         APNIC

person:         IP Manager
address:        Daegu Dalseo-gu Dalgubeol-daero 1611
country:        KR
phone:          +82-53-551-2009
e-mail:         [email protected]
nic-hdl:        IM706-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2024-11-15T08:44:04Z
source:         APNIC

inetnum:        121.55.64.0 - 121.55.127.255
netname:        GCS-KR
descr:          GREEN CABLE TELEVISION STATION
country:        KR
admin-c:        KW472-KR
tech-c:         KD472-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.
source:         KRNIC

person:         IP Manager
address:        Daegu Dalseo-gu Dalgubeol-daero 1611
address:        gamsamdong
country:        KR
phone:          +82-53-551-2009
e-mail:         [email protected]
nic-hdl:        KD472-KR
mnt-by:         MNT-KRNIC-AP
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.
source:         KRNIC

person:         IP Manager
address:        Daegu Dalseo-gu Dalgubeol-daero 1611
address:        gamsamdong
country:        KR
phone:          +82-53-551-2009
e-mail:         [email protected]
nic-hdl:        KW472-KR
mnt-by:         MNT-KRNIC-AP
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.
source:         KRNIC

Overlapping Ranges

BGP prefixes that contain 121.55.64.0/20

Range	ASN	Company	Num of IPs
121.55.64.0/18	AS9781	GREEN CABLE TELEVISION STATION	16,384

Nearby Ranges

BGP prefixes that overlap with 121.55.0.0/16

Range	ASN	Company	Num of IPs
121.55.192.0/18	AS3605	Kuentos Communications	16,384
121.55.0.0/18	AS45061	Shanghai Information Network Co.,Ltd.	16,384
121.55.128.0/18	AS9781	GREEN CABLE TELEVISION STATION	16,384
121.55.64.0/18	AS9781	GREEN CABLE TELEVISION STATION	16,384
121.55.192.0/19	AS3605	Kuentos Communications, Inc.	8,192
121.55.224.0/19	AS3605	Kuentos Communications, Inc.	8,192

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

1,506 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
121.55.68.1	AS9781 GREEN CABLE TELEVISION STATION	`5.92ms` from Seoul, KR
121.55.77.255	AS9781 GREEN CABLE TELEVISION STATION	`5.75ms` from Seoul, KR
121.55.69.0	AS9781 GREEN CABLE TELEVISION STATION	`5.84ms` from Seoul, KR
121.55.71.255	AS9781 GREEN CABLE TELEVISION STATION	`5.42ms` from Seoul, KR
121.55.64.6	AS9781 GREEN CABLE TELEVISION STATION	`5.39ms` from Seoul, KR
121.55.74.255	AS9781 GREEN CABLE TELEVISION STATION	`5.60ms` from Seoul, KR
121.55.79.1	AS9781 GREEN CABLE TELEVISION STATION	`5.69ms` from Seoul, KR
121.55.67.1	AS9781 GREEN CABLE TELEVISION STATION	`5.75ms` from Seoul, KR
121.55.73.255	AS9781 GREEN CABLE TELEVISION STATION	`5.85ms` from Seoul, KR
121.55.72.255	AS9781 GREEN CABLE TELEVISION STATION	`5.60ms` from Seoul, KR
121.55.66.255	AS9781 GREEN CABLE TELEVISION STATION	`5.92ms` from Seoul, KR
121.55.65.255	AS9781 GREEN CABLE TELEVISION STATION	`5.42ms` from Seoul, KR
121.55.75.0	AS9781 GREEN CABLE TELEVISION STATION	`5.86ms` from Seoul, KR
121.55.76.1	AS9781 GREEN CABLE TELEVISION STATION	`5.73ms` from Seoul, KR
121.55.70.255	AS9781 GREEN CABLE TELEVISION STATION	`5.51ms` from Seoul, KR
121.55.78.255	AS9781 GREEN CABLE TELEVISION STATION	`5.77ms` 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
112.141.98.164	AS9443 Vocus Retail	`2.31ms` from Adelaide, AU
150.241.107.52	AS215590 DpkgSoft International Limited	`0.13ms` from Amsterdam, NL
36.135.105.4	AS134810 China Mobile Group JiLin communications corporation	`10.83ms` from Harbin, CN
221.229.45.20	AS4134 CHINANET-BACKBONE	`5.31ms` from Huai'an, CN
103.10.60.52	AS38758 PT. HIPERNET INDODATA	`2.89ms` from Jakarta, ID
117.121.233.244	AS4613 Mercantile Office Systems	`0.89ms` from Kathmandu, NP
122.177.249.52	AS24560 Bharti Airtel Ltd., Telemedia Services	`5.24ms` from Kolkata, IN
42.7.125.196	AS4837 CHINA UNICOM China169 Backbone	`12.46ms` from Liaoyang, CN
83.106.71.100	AS5378 Vodafone Limited	`5.93ms` from London, GB
221.250.59.180	AS17506 ARTERIA Networks Corporation	`1.11ms` from Osaka, JP
52.21.244.68	AS14618 Amazon.com, Inc.	`0.16ms` from Reston, US
44.199.175.52	AS14618 Amazon.com, Inc.	`0.16ms` from Reston, US
73.157.31.164	AS7922 Comcast Cable Communications, LLC	`6.09ms` from Seattle, US
75.97.100.228	AS3737 PenTeleData Inc.	`10.67ms` from Secaucus, US
110.46.178.36	AS38091 LG HelloVision Corp.	`0.77ms` from Seoul, KR
221.155.121.228	AS4766 Korea Telecom	`1.80ms` from Seoul, KR
154.205.187.4	AS137510 JENEXUS HOLDING SDN BHD	`0.47ms` from Sepang, MY
175.182.170.148	AS4780 Digital United Inc.	`6.18ms` from Taipei, TW
178.209.244.84	AS12714 PJSC MegaFon	`15.43ms` from Yekaterinburg, RU
168.62.111.84	AS8075 Microsoft Corporation	`0.51ms` from Chicago, US
104.52.61.68	AS7018 AT&T Enterprises, LLC	`7.02ms` from Dallas, US
20.221.24.100	AS8075 Microsoft Corporation	`0.35ms` from Des Moines, US
86.160.225.84	AS2856 British Telecommunications PLC	`2.91ms` from London, GB
176.65.55.84	AS49814 TomGate LLC	`4.86ms` from Novosibirsk, RU
200.20.0.100	AS2715 Fundação Carlos Chagas Filho de Amparo a Pesquisa	`1.32ms` from Rio de Janeiro, BR

Traceroute

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

traceroute -a -n -q1 -f3 121.55.73.19

traceroute to 121.55.73.19 (121.55.73.19): 64 hops max, 52 byte packets

3 [AS9848] 211.116.176.135 1.576 ms

4 [AS9848] 211.115.200.98 6.514 ms

5 *

6 [AS9781] 121.55.64.254 6.757 ms

7 *

8 [AS9781] 121.55.73.19 41.778 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On December 14th 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.

An API built with users in mind: reliable, accurate, and easy-to-use

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

Get Started for Free Contact Sales