121.55.96.0/20

AS9781 · GREEN CABLE TELEVISION STATION

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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 121.55.96.0/20

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

1,321 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

IP Address	ASN	Details
121.55.106.1	AS9781 GREEN CABLE TELEVISION STATION	`5.76ms` from Seoul, KR
121.55.100.0	AS9781 GREEN CABLE TELEVISION STATION	`6.13ms` from Seoul, KR
121.55.107.1	AS9781 GREEN CABLE TELEVISION STATION	`5.70ms` from Seoul, KR
121.55.103.1	AS9781 GREEN CABLE TELEVISION STATION	`5.54ms` from Seoul, KR
121.55.98.1	AS9781 GREEN CABLE TELEVISION STATION	`5.97ms` from Seoul, KR
121.55.108.255	AS9781 GREEN CABLE TELEVISION STATION	`5.72ms` from Seoul, KR
121.55.111.0	AS9781 GREEN CABLE TELEVISION STATION	`5.32ms` from Seoul, KR
121.55.99.1	AS9781 GREEN CABLE TELEVISION STATION	`5.97ms` from Seoul, KR
121.55.109.0	AS9781 GREEN CABLE TELEVISION STATION	`5.61ms` from Seoul, KR
121.55.104.1	AS9781 GREEN CABLE TELEVISION STATION	`5.60ms` from Seoul, KR
121.55.102.1	AS9781 GREEN CABLE TELEVISION STATION	`5.94ms` from Seoul, KR
121.55.110.1	AS9781 GREEN CABLE TELEVISION STATION	`5.46ms` from Seoul, KR
121.55.97.0	AS9781 GREEN CABLE TELEVISION STATION	`5.52ms` from Seoul, KR
121.55.105.255	AS9781 GREEN CABLE TELEVISION STATION	`5.61ms` from Seoul, KR
121.55.96.1	AS9781 GREEN CABLE TELEVISION STATION	`5.79ms` from Seoul, KR
121.55.101.0	AS9781 GREEN CABLE TELEVISION STATION	`5.94ms` 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
167.102.244.4	AS27026 networkMaryland	`3.48ms` from Ashburn, US
68.44.148.52	AS7922 Comcast Cable Communications, LLC	`12.88ms` from Chicago, US
80.170.171.36	AS1257 Tele2 Sverige AB	`0.51ms` from Goeteborg, SE
35.139.234.244	AS33363 Charter Communications, Inc	`9.62ms` from Orlando, US
126.94.166.116	AS17676 SoftBank Corp.	`3.77ms` from Osaka, JP
126.92.14.100	AS17676 SoftBank Corp.	`3.93ms` from Osaka, JP
49.251.113.164	AS9617 JCOM Co., Ltd.	`6.81ms` from Osaka, JP
212.46.69.100	AS47408 Mandarin S.p.A.	`9.31ms` from Palermo, IT
62.244.93.228	AS16347 ADISTA SAS	`1.07ms` from Paris, FR
148.206.54.4	AS3596 Universidad Autonoma Metropolitana	`4.55ms` from Santiago de Querétaro, MX
49.26.135.132	AS4766 Korea Telecom	`6.36ms` from Seoul, KR
35.247.165.20	AS396982 Google LLC	`0.12ms` from Singapore, SG
172.174.108.148	AS8075 Microsoft Corporation	`0.44ms` from Ashburn, US
93.216.59.244	AS3320 Deutsche Telekom AG	`4.23ms` from Frankfurt am Main, DE
106.55.167.84	AS45090 Shenzhen Tencent Computer Systems Company Limited	`1.99ms` from Guangzhou, CN
172.239.70.36	AS63949 Akamai Connected Cloud	`0.24ms` from Los Angeles, US
89.225.134.84	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`3.47ms` from Paris, FR
149.202.34.52	AS16276 OVH SAS	`0.15ms` from Strasbourg, FR
34.84.241.148	AS396982 Google LLC	`0.15ms` from Tokyo, JP
42.239.140.196	AS4837 CHINA UNICOM China169 Backbone	`6.37ms` from Zhengzhou, CN
185.192.16.244	AS206092 F.N.S. HOLDINGS LIMITED	`0.47ms` from Dublin, IE
81.141.184.36	AS2856 British Telecommunications PLC	`6.24ms` from Erith, GB
77.129.204.212	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`4.17ms` from Lausanne, CH
177.198.151.196	AS26599 TELEFÔNICA BRASIL S.A	`2.08ms` from Osasco, BR
181.217.135.244	AS28573 Claro NXT Telecomunicacoes Ltda	`11.19ms` from Porto Alegre, BR

Traceroute

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

traceroute -a -n -q1 -f5 121.55.97.2

traceroute to 121.55.97.2 (121.55.97.2): 64 hops max, 52 byte packets

5 [AS4637] 210.176.150.116 1.168 ms

6 *

7 *

8 *

9 *

10 [AS9318] 116.120.104.82 6.428 ms

11 [AS9781] 121.55.64.67 7.13 ms

12 [AS9781] 121.55.97.2 14.15 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.

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