121.55.72.0/21

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	KRNIC
ID	121.55.72.0-121.55.72.255

WHOIS Details

inetnum:            121.55.72.0 - 121.55.72.255
descr:              GREEN CABLE TELEVISION STATION
network-type:       INFRA
address:            Daegu Dalseo-gu Dalgubeol-daero 1611
zip-code:           42640
created:            2006-10-02
admin:              GENERATED-KRNIC-IP-MANAGER-YS0964
country:            KR
source:             KRNIC

nic-hdl:            GENERATED-KRNIC-IP-MANAGER-YS0964
person:             IP Manager
name:               IP Manager
phone:              +82-53-551-2009
e-mail:             [email protected]
source:             KRNIC

Overlapping Ranges

BGP prefixes that contain 121.55.72.0/21

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

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Pingable IPs

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

IP Address	ASN	Details
121.55.77.255	AS9781 GREEN CABLE TELEVISION STATION	`5.75ms` 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
121.55.73.255	AS9781 GREEN CABLE TELEVISION STATION	`5.85ms` from Seoul, KR
121.55.72.255	AS9781 GREEN CABLE TELEVISION STATION	`5.60ms` from Seoul, KR
121.55.75.0	AS9781 GREEN CABLE TELEVISION STATION	`5.86ms` from Seoul, KR
121.55.76.1	AS9781 GREEN CABLE TELEVISION STATION	`5.73ms` from Seoul, KR
121.55.78.255	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
67.129.150.53	AS209 CenturyLink Communications, LLC	`2.87ms` from Ashburn, US
94.227.121.117	AS6848 Telenet BV	`6.19ms` from Brussels, BE
72.246.213.133	AS16625 Akamai Technologies, Inc.	`0.30ms` from Buenos Aires, AR
105.68.241.245	AS36884 Wana Corporate	`4.30ms` from Casablanca, MA
73.144.203.149	AS7922 Comcast Cable Communications, LLC	`7.20ms` from Flint, US
62.245.204.133	AS8767 M-net Telekommunikations GmbH	`4.14ms` from Frankfurt am Main, DE
183.232.82.197	AS56040 China Mobile communications corporation	`6.69ms` from Guangzhou, CN
89.109.1.165	AS12389 PJSC Rostelecom	`6.05ms` from Kazan, RU
39.36.255.69	AS17557 Pakistan Telecommunication Company Limited	`5.14ms` from Lahore, PK
82.19.74.229	AS5089 Virgin Media Limited	`4.88ms` from London, GB
89.141.90.229	AS12430 VODAFONE ESPANA S.A.U.	`11.31ms` from Madrid, ES
5.128.5.101	AS31200 Novotelecom Ltd	`1.22ms` from Novosibirsk, RU
217.87.228.197	AS3320 Deutsche Telekom AG	`7.92ms` from Nuernberg, DE
27.98.112.37	AS10010 TOKAI Communications Corporation	`6.34ms` from Osaka, JP
144.123.23.149	AS4134 CHINANET-BACKBONE	`5.77ms` from Qingdao, CN
134.197.150.133	AS3851 Nevada System of Higher Education	`7.58ms` from San Jose, US
49.26.72.117	AS4766 Korea Telecom	`5.52ms` from Seoul, KR
175.125.83.21	AS9318 SK Broadband Co Ltd	`6.95ms` from Seoul, KR
24.111.149.245	AS11232 Midcontinent Communications	`7.53ms` from Sioux Falls, US
77.126.89.117	AS12400 Partner Communications Ltd.	`10.66ms` from Tel Aviv, IL
126.111.9.53	AS17676 SoftBank Corp.	`9.85ms` from Tokyo, JP
173.241.130.245	AS3257 GTT Communications Inc.	`0.29ms` from Vancouver, CA
213.200.202.149	AS3303 Swisscom (Switzerland) Ltd	`1.01ms` from Zuerich, CH
178.88.212.181	AS9198 JSC Kazakhtelecom	`6.54ms` from Astana, KZ
87.183.176.133	AS3320 Deutsche Telekom AG	`5.85ms` from Berlin, DE

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.

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