121.55.80.0/20

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 121.55.80.0/20

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

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

IP Address	ASN	Details
121.55.89.12	AS9781 GREEN CABLE TELEVISION STATION	`6.12ms` from Seoul, KR
121.55.84.255	AS9781 GREEN CABLE TELEVISION STATION	`5.87ms` from Seoul, KR
121.55.91.84	AS9781 GREEN CABLE TELEVISION STATION	`5.97ms` from Seoul, KR
121.55.87.255	AS9781 GREEN CABLE TELEVISION STATION	`5.99ms` from Seoul, KR
121.55.83.1	AS9781 GREEN CABLE TELEVISION STATION	`5.92ms` from Seoul, KR
121.55.85.255	AS9781 GREEN CABLE TELEVISION STATION	`5.34ms` from Seoul, KR
121.55.82.0	AS9781 GREEN CABLE TELEVISION STATION	`5.81ms` from Seoul, KR
121.55.92.167	AS9781 GREEN CABLE TELEVISION STATION	`5.96ms` from Seoul, KR
121.55.86.0	AS9781 GREEN CABLE TELEVISION STATION	`6.11ms` from Seoul, KR
121.55.93.1	AS9781 GREEN CABLE TELEVISION STATION	`5.55ms` from Seoul, KR
121.55.88.255	AS9781 GREEN CABLE TELEVISION STATION	`5.72ms` from Seoul, KR
121.55.90.64	AS9781 GREEN CABLE TELEVISION STATION	`6.33ms` from Seoul, KR
121.55.95.1	AS9781 GREEN CABLE TELEVISION STATION	`5.83ms` from Seoul, KR
121.55.94.1	AS9781 GREEN CABLE TELEVISION STATION	`5.83ms` from Seoul, KR
121.55.81.1	AS9781 GREEN CABLE TELEVISION STATION	`5.86ms` from Seoul, KR
121.55.80.1	AS9781 GREEN CABLE TELEVISION STATION	`5.96ms` 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
169.62.60.20	AS36351 IBM Cloud	`0.46ms` from Ashburn, US
102.222.12.20	AS328767 Wiza Solutions Pty Ltd	`0.90ms` from Cape Town, ZA
192.249.55.100	AS55025 BLUEZONE INTERNET INC	`12.39ms` from Dallas, US
217.224.86.164	AS3320 Deutsche Telekom AG	`2.14ms` from Frankfurt am Main, DE
109.148.243.36	AS2856 British Telecommunications PLC	`4.26ms` from London, GB
81.40.164.196	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.45ms` from Madrid, ES
124.104.146.212	AS9299 Philippine Long Distance Telephone Company	`1.04ms` from Manila, PH
90.119.233.244	AS3215 Orange S.A.	`5.83ms` from Marseille, FR
165.228.215.228	AS1221 Telstra Limited	`2.10ms` from Melbourne, AU
69.126.49.132	AS6128 Cablevision Systems Corp.	`2.88ms` from New York City, US
20.38.169.164	AS8075 Microsoft Corporation	`0.17ms` from Phoenix, US
13.223.233.132	AS14618 Amazon.com, Inc.	`0.38ms` from Reston, US
73.187.62.244	AS7922 Comcast Cable Communications, LLC	`18.88ms` from Reston, US
78.84.235.84	AS12578 SIA Tet	`1.32ms` from Riga, LV
200.104.231.36	AS22047 VTR BANDA ANCHA S.A.	`1.13ms` from Santiago, CL
1.104.98.68	AS4766 Korea Telecom	`2.87ms` from Seoul, KR
218.166.179.228	AS3462 Data Communication Business Group	`7.44ms` from Taichung, TW
190.1.6.4	AS27833 BVNET S.A.	`7.70ms` from Buenos Aires, AR
12.229.171.4	AS7018 AT&T Enterprises, LLC	`3.70ms` from Chicago, US
189.30.71.36	AS8167 V tal	`7.93ms` from Curitiba, BR
68.12.199.52	AS22773 Cox Communications Inc.	`9.25ms` from Dallas, US
137.191.242.196	AS15806 Irish Government	`0.61ms` from Dublin, IE
84.157.89.36	AS3320 Deutsche Telekom AG	`1.36ms` from Frankfurt am Main, DE
131.188.164.68	AS680 Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.	`4.02ms` from Frankfurt am Main, DE
83.135.124.84	AS8881 1&1 Versatel GmbH	`10.01ms` from Frankfurt am Main, DE

Traceroute

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

traceroute -a -n -q1 -f2 121.55.92.61

traceroute to 121.55.92.61 (121.55.92.61): 64 hops max, 52 byte packets

2 [AS9848] 61.250.82.93 1.121 ms

3 [AS9848] 211.115.197.78 1.558 ms

4 *

5 *

6 *

7 [AS9781] 121.55.92.61 7.655 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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