121.55.112.0/20

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 121.55.112.0/20

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

1,755 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
121.55.125.1	AS9781 GREEN CABLE TELEVISION STATION	`5.74ms` from Seoul, KR
121.55.114.1	AS9781 GREEN CABLE TELEVISION STATION	`5.74ms` from Seoul, KR
121.55.118.39	AS9781 GREEN CABLE TELEVISION STATION	`5.93ms` from Seoul, KR
121.55.116.0	AS9781 GREEN CABLE TELEVISION STATION	`5.87ms` from Seoul, KR
121.55.127.0	AS9781 GREEN CABLE TELEVISION STATION	`5.37ms` from Seoul, KR
121.55.112.0	AS9781 GREEN CABLE TELEVISION STATION	`5.63ms` from Seoul, KR
121.55.124.1	AS9781 GREEN CABLE TELEVISION STATION	`5.47ms` from Seoul, KR
121.55.126.255	AS9781 GREEN CABLE TELEVISION STATION	`5.42ms` from Seoul, KR
121.55.121.255	AS9781 GREEN CABLE TELEVISION STATION	`5.57ms` from Seoul, KR
121.55.119.21	AS9781 GREEN CABLE TELEVISION STATION	`5.93ms` from Seoul, KR
121.55.113.255	AS9781 GREEN CABLE TELEVISION STATION	`5.59ms` from Seoul, KR
121.55.123.1	AS9781 GREEN CABLE TELEVISION STATION	`5.67ms` from Seoul, KR
121.55.120.1	AS9781 GREEN CABLE TELEVISION STATION	`6.55ms` from Seoul, KR
121.55.117.55	AS9781 GREEN CABLE TELEVISION STATION	`6.04ms` from Seoul, KR
121.55.115.255	AS9781 GREEN CABLE TELEVISION STATION	`5.68ms` from Seoul, KR
121.55.122.1	AS9781 GREEN CABLE TELEVISION STATION	`5.76ms` 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
68.219.168.228	AS8075 Microsoft Corporation	`0.22ms` from Amsterdam, NL
78.99.255.116	AS6855 Slovak Telekom, a.s.	`4.92ms` from Bratislava, SK
99.6.151.52	AS7018 AT&T Enterprises, LLC	`3.79ms` from Dallas, US
74.129.149.36	AS10796 Charter Communications Inc	`9.74ms` from Flint, US
91.53.102.132	AS3320 Deutsche Telekom AG	`4.77ms` from Frankfurt am Main, DE
187.144.155.52	AS8151 UNINET	`1.05ms` from Guadalajara, MX
88.195.202.68	AS1759 Telia Finland Oyj	`7.94ms` from Helsinki, FI
113.192.31.52	AS149360 PT Indo Telemedia Solusi	`0.27ms` from Jakarta, ID
207.8.71.132	AS2828 Verizon Business	`2.57ms` from Los Angeles, US
37.10.210.196	AS3352 TELEFONICA DE ESPANA S.A.U.	`17.60ms` from Madrid, ES
2.47.45.164	AS30722 Vodafone Italia S.p.A.	`1.54ms` from Milan, IT
109.219.185.20	AS3215 Orange S.A.	`11.77ms` from Paris, FR
123.235.225.180	AS4837 CHINA UNICOM China169 Backbone	`1.27ms` from Qingdao, CN
24.107.3.4	AS20115 Charter Communications LLC	`6.11ms` from St. Louis, US
140.128.185.100	AS1659 Taiwan Academic Network (TANet) Information Center	`3.75ms` from Taichung, TW
216.223.129.100	AS12059 Internet Light and Power Inc.	`0.35ms` from Toronto, CA
148.163.140.132	AS22843 Proofpoint, Inc.	`0.69ms` from Atlanta, US
76.145.59.68	AS7922 Comcast Cable Communications, LLC	`4.18ms` from Atlanta, US
203.150.4.36	AS4618 Internet Thailand Company Limited	`1.27ms` from Bangkok, TH
117.247.135.84	AS9829 National Internet Backbone	`1.41ms` from Chennai, IN
103.46.150.4	AS133890 Bangladesh Army	`0.89ms` from Dhaka, BD
120.138.64.36	AS38244 VNG Corporation	`0.66ms` from Ho Chi Minh City, VN
76.85.28.164	AS11427 Charter Communications Inc	`16.59ms` from Houston, US
105.29.70.164	AS37100 SEACOM Limited	`0.21ms` from Johannesburg, ZA
109.151.249.84	AS2856 British Telecommunications PLC	`1.46ms` from London, GB

Traceroute

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

traceroute -a -n -q1 -f5 121.55.117.135

traceroute to 121.55.117.135 (121.55.117.135): 64 hops max, 52 byte packets

5 [AS9848] 203.231.94.198 5.884 ms

6 [AS9781] 121.55.64.250 6.12 ms

7 *

8 [AS9781] 121.55.117.135 6.683 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