121.55.128.0/21

AS9781 · GREEN CABLE TELEVISION STATION

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Summary

Country	South Korea
Domain	gcs.co.kr
ASN	AS9781
Parent Range	121.55.128.0/18
Registry	KRNIC
ID	121.55.128.0-121.55.128.255

WHOIS Details

inetnum:            121.55.128.0 - 121.55.128.255
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 121.55.128.0/21

Range	ASN	Company	Num of IPs
121.55.128.0/18	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

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

IP Address	ASN	Details
121.55.128.255	AS9781 GREEN CABLE TELEVISION STATION	`5.55ms` from Seoul, KR
121.55.129.0	AS9781 GREEN CABLE TELEVISION STATION	`5.46ms` from Seoul, KR
121.55.133.255	AS9781 GREEN CABLE TELEVISION STATION	`5.84ms` from Seoul, KR
121.55.135.255	AS9781 GREEN CABLE TELEVISION STATION	`5.66ms` from Seoul, KR
121.55.132.255	AS9781 GREEN CABLE TELEVISION STATION	`6.03ms` from Seoul, KR
121.55.130.0	AS9781 GREEN CABLE TELEVISION STATION	`5.71ms` from Seoul, KR
121.55.131.0	AS9781 GREEN CABLE TELEVISION STATION	`5.43ms` from Seoul, KR
121.55.134.0	AS9781 GREEN CABLE TELEVISION STATION	`5.57ms` 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
60.6.250.229	AS4837 CHINA UNICOM China169 Backbone	`8.35ms` from Beijing, CN
1.119.56.69	AS58851 Priority of Fashion(Beijing)Information Technology Co.,Ltd	`5.54ms` from Beijing, CN
196.61.228.5	AS328068 Beginning 2 End Technologies	`0.49ms` from Durban, ZA
140.224.39.117	AS4134 CHINANET-BACKBONE	`5.92ms` from Fuzhou, CN
4.26.107.213	AS3356 Level 3 Parent, LLC	`0.65ms` from Houston, US
37.55.73.245	AS6849 JSC "Ukrtelecom"	`8.57ms` from Khmelnytskyi, UA
86.137.83.149	AS2856 British Telecommunications PLC	`2.71ms` from London, GB
2.123.58.197	AS5607 Sky UK Limited	`5.75ms` from London, GB
83.42.35.5	AS3352 TELEFONICA DE ESPANA S.A.U.	`8.42ms` from Madrid, ES
195.22.123.5	AS197808 Technical Services Company Ltd	`0.76ms` from Moscow, RU
68.52.7.53	AS7922 Comcast Cable Communications, LLC	`6.93ms` from Murfreesboro, US
71.195.228.181	AS7922 Comcast Cable Communications, LLC	`5.02ms` from Salt Lake City, US
61.108.9.37	AS9316 DACOM-PUBNETPLUS	`4.27ms` from Seoul, KR
35.198.202.5	AS396982 Google LLC	`0.12ms` from Singapore, SG
195.3.65.37	AS8447 A1 Telekom Austria AG	`0.25ms` from Vienna, AT
110.49.138.53	AS38444 Super Broadband Network	`1.46ms` from Bangkok, TH
121.210.213.181	AS1221 Telstra Limited	`2.34ms` from Brisbane, AU
84.119.255.197	AS3209 Vodafone GmbH	`8.70ms` from Frankfurt am Main, DE
62.224.89.165	AS3320 Deutsche Telekom AG	`4.84ms` from Frankfurt am Main, DE
171.232.47.85	AS7552 Viettel Group	`1.53ms` from Ho Chi Minh City, VN
221.124.35.245	AS9304 HGC Global Communications Limited	`1.24ms` from Hong Kong, HK
67.52.74.117	AS20001 Charter Communications Inc	`2.02ms` from Honolulu, US
185.160.155.5	AS205694 Fibranet Telecomunicaciones Murcia S.L.	`8.69ms` from Madrid, ES
103.205.126.21	AS17625 BlazeNet's Network	`0.58ms` from Mumbai, IN
173.52.94.101	AS701 Verizon Business	`2.48ms` from New York City, US

Traceroute

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

traceroute -a -n -q1 -f2 121.55.132.124

traceroute to 121.55.132.124 (121.55.132.124): 64 hops max, 52 byte packets

2 [AS9848] 61.250.82.93 1.168 ms

3 [AS9848] 211.116.176.136 1.562 ms

4 *

5 *

6 [AS9781] 121.55.64.250 6.257 ms

7 *

8 [AS9781] 121.55.132.124 14.984 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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