121.55.104.0/21

AS9781 · GREEN CABLE TELEVISION STATION

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Summary

Country	South Korea
Domain	gcs.co.kr
ASN	AS9781
Registry	APNIC
ID	GCS

WHOIS Details

inetnum:        121.55.64.0 - 121.55.191.255
netname:        GCS
descr:          GREEN CABLE TELEVISION STATION
admin-c:        IM706-AP
tech-c:         IM706-AP
country:        KR
status:         ALLOCATED PORTABLE
mnt-by:         MNT-KRNIC-AP
mnt-irt:        IRT-KRNIC-KR
last-modified:  2017-02-02T01:24:38Z
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:        Daegu Dalseo-gu Dalgubeol-daero 1611
country:        KR
phone:          +82-53-551-2009
e-mail:         ys0964@gcs.co.kr
nic-hdl:        IM706-AP
mnt-by:         MNT-KRNIC-AP
last-modified:  2024-11-15T08:44:04Z
source:         APNIC

inetnum:        121.55.64.0 - 121.55.191.255
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.
changed:        hostmaster@nic.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:         ys0964@gcs.co.kr
nic-hdl:        KD472-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.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:         ys0964@gcs.co.kr
nic-hdl:        KW472-KR
mnt-by:         MNT-KRNIC-AP
changed:        hostmaster@nic.or.kr
source:         KRNIC

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

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

IP Address	ASN	Details
121.55.107.0	AS9781 GREEN CABLE TELEVISION STATION	`5.61ms` from Seoul, KR
121.55.108.255	AS9781 GREEN CABLE TELEVISION STATION	`5.92ms` from Seoul, KR
121.55.105.255	AS9781 GREEN CABLE TELEVISION STATION	`5.53ms` from Seoul, KR
121.55.110.255	AS9781 GREEN CABLE TELEVISION STATION	`5.58ms` from Seoul, KR
121.55.104.0	AS9781 GREEN CABLE TELEVISION STATION	`5.67ms` from Seoul, KR
121.55.106.0	AS9781 GREEN CABLE TELEVISION STATION	`5.60ms` from Seoul, KR
121.55.111.1	AS9781 GREEN CABLE TELEVISION STATION	`5.82ms` from Seoul, KR
121.55.109.1	AS9781 GREEN CABLE TELEVISION STATION	`5.80ms` 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
216.15.10.5	AS6079 RCN	`6.05ms` from Ashburn, US
162.81.222.21	AS33566 Knoxville Utilities Board	`6.43ms` from Atlanta, US
20.81.162.53	AS8075 Microsoft Corporation	`0.22ms` from Boydton, US
68.70.140.213	AS8134 Baraga Telephone Company	`14.61ms` from Detroit, US
93.223.190.5	AS3320 Deutsche Telekom AG	`5.81ms` from Frankfurt am Main, DE
185.220.5.101	AS212547 Webu SARL-SCOP	`2.68ms` from Geneve, CH
95.113.129.149	AS6805 Telefonica Germany GmbH & Co.OHG	`1.28ms` from Hamburg, DE
14.169.68.245	AS45899 VNPT Corp	`1.61ms` from Ho Chi Minh City, VN
107.134.118.117	AS7018 AT&T Enterprises, LLC	`2.38ms` from Miami, US
219.103.53.181	AS17958 Kasaoka Cable Vision Co,LTD.	`6.49ms` from Osaka, JP
221.139.39.37	AS9318 SK Broadband Co Ltd	`1.03ms` from Seoul, KR
114.200.95.117	AS9318 SK Broadband Co Ltd	`4.46ms` from Seoul, KR
183.238.180.85	AS56040 China Mobile communications corporation	`5.80ms` from Shenzhen, CN
52.77.127.245	AS16509 Amazon.com, Inc.	`0.10ms` from Singapore, SG
78.39.138.181	AS58224 Iran Telecommunication Company PJS	`17.25ms` from Yerevan, AM
47.253.173.213	AS45102 Alibaba (US) Technology Co., Ltd.	`0.31ms` from Ashburn, US
71.30.61.229	AS7029 Windstream Communications LLC	`4.78ms` from Atlanta, US
203.174.180.69	AS2764 AAPT Limited	`0.71ms` from Brisbane, AU
68.50.65.133	AS7922 Comcast Cable Communications, LLC	`15.01ms` from Chicago, US
124.234.172.21	AS4134 CHINANET-BACKBONE	`11.25ms` from Dalian, CN
42.176.183.5	AS4837 CHINA UNICOM China169 Backbone	`12.37ms` from Dalian, CN
176.202.218.165	AS8781 Ooredoo Q.S.C.	`2.13ms` from Doha, QA
130.180.76.245	AS3209 Vodafone GmbH	`7.29ms` from Frankfurt am Main, DE
217.85.186.213	AS3320 Deutsche Telekom AG	`2.71ms` from Frankfurt am Main, DE
115.124.31.21	AS37963 Hangzhou Alibaba Advertising Co.,Ltd.	`4.42ms` from Hangzhou, CN

Traceroute

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

traceroute -a -n -q1 121.55.111.0

traceroute to 121.55.111.0 (121.55.111.0): 64 hops max, 52 byte packets

1 [AS15169] 172.253.64.143 1.213 ms

2 [AS9848] 61.250.82.93 1.678 ms

3 [AS9848] 211.115.197.78 1.529 ms

4 [AS9848] 211.115.200.107 6.081 ms

5 [AS9848] 203.231.94.198 6.187 ms

6 [AS9781] 121.55.64.246 6.342 ms

7 [AS9781] 121.55.111.0 6.847 ms

Measurement taken from

IPinfo ProbeNet in Seoul, KR

On September 11th 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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