121.128.219.0/24

AS9647 · Seoul Metropolitan Government

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Summary

Country	South Korea
Domain	kt.com
ASN	AS9647
Parent Range	121.128.0.0/11
Registry	KRNIC
ID	121.128.219.0-121.128.219.255

WHOIS Details

inetnum:            121.128.219.0 - 121.128.219.255
descr:              Korea Telecom
network-type:       CUSTOMER
address:            90 Buljeongro Bundang-Gu Seongnam-Si Gyeonggi-Do
zip-code:           13606
created:            2023-03-22
admin:              GENERATED-KRNIC-IP-MANAGER-KORNETIP
country:            KR
source:             KRNIC

nic-hdl:            GENERATED-KRNIC-IP-MANAGER-KORNETIP
person:             IP Manager
name:               IP Manager
phone:              +82-2-500-6630
e-mail:             [email protected]
source:             KRNIC

Overlapping Ranges

BGP prefixes that contain 121.128.219.0/24

Range	ASN	Company	Num of IPs
121.128.0.0/11	AS17588	Korea Telecom	2,097,152
121.128.0.0/11	AS18333	Korea Telecom	2,097,152
121.128.0.0/11	AS38122	Korea Telecom	2,097,152
121.128.0.0/11	AS4766	Korea Telecom	2,097,152
121.128.0.0/11	AS9647	Korea Telecom	2,097,152
121.128.0.0/11	AS9856	Korea Telecom	2,097,152

Nearby Ranges

BGP prefixes that overlap with 121.128.0.0/16

Range	ASN	Company	Num of IPs
121.128.0.0/11	AS9856	Korea Telecom	2,097,152
121.128.0.0/11	AS17588	Korea Telecom	2,097,152
121.128.0.0/11	AS18333	Korea Telecom	2,097,152
121.128.0.0/11	AS38122	Korea Telecom	2,097,152
121.128.0.0/11	AS4766	Korea Telecom	2,097,152
121.128.0.0/11	AS9647	Korea Telecom	2,097,152
121.128.97.0/24	AS152214	Korea Telecom	256

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

No IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.

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
97.201.176.88	AS6167 Verizon Business	`10.70ms` from Atlanta, US
155.141.151.120	AS668 United States Department of Defense (DoD)	`0.56ms` from Atlanta, US
190.122.200.200	AS28066 COOP. MARIANO ACOSTA	`2.07ms` from Buenos Aires, AR
184.106.169.8	AS19994 Rackspace Hosting	`1.25ms` from Chicago, US
46.55.122.184	AS8926 Moldtelecom SA	`2.66ms` from Chisinau, MD
90.232.172.8	AS3301 Telia Company AB	`9.84ms` from Goeteborg, SE
171.249.21.56	AS7552 Viettel Group	`4.50ms` from Ho Chi Minh City, VN
193.144.187.88	AS766 RedIRIS Autonomous System	`10.05ms` from Madrid, ES
92.26.156.88	AS13285 TalkTalk Communications Limited	`4.53ms` from Manchester, GB
203.221.154.104	AS7545 TPG Telecom Limited	`1.66ms` from Melbourne, AU
177.115.54.136	AS26599 TELEFÔNICA BRASIL S.A	`1.55ms` from Osasco, BR
93.67.100.232	AS30722 Vodafone Italia S.p.A.	`8.81ms` from Rome, IT
166.148.80.168	AS6167 Verizon Business	`19.92ms` from San Jose, US
61.253.27.136	AS9318 SK Broadband Co Ltd	`4.32ms` from Seoul, KR
62.46.178.216	AS8447 A1 Telekom Austria AG	`3.75ms` from Vienna, AT
208.93.8.8	AS54900 Alianza Inc.	`0.42ms` from Ashburn, US
216.246.223.232	AS398420 Tishomingo Connect, LLC	`10.65ms` from Atlanta, US
152.110.203.72	AS20011 Dimension Data	`2.67ms` from Cape Town, ZA
1.60.150.56	AS4837 CHINA UNICOM China169 Backbone	`18.82ms` from Changchun, CN
45.36.93.8	AS11426 Charter Communications Inc	`11.18ms` from Charlotte, US
50.116.18.248	AS63949 Akamai Connected Cloud	`0.76ms` from Dallas, US
123.21.250.8	AS45899 VNPT Corp	`1.52ms` from Ho Chi Minh City, VN
64.5.71.152	AS32867 Long Lines Internet	`8.43ms` from Lincoln, US
86.163.253.120	AS2856 British Telecommunications PLC	`4.31ms` from London, GB
79.249.231.168	AS3320 Deutsche Telekom AG	`9.18ms` from Nuernberg, DE

Traceroute

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

traceroute -a -n -q1 -m12 121.128.219.61

traceroute to 121.128.219.61 (121.128.219.61): 12 hops max, 52 byte packets

1 [AS15169] 64.233.174.23 47.858 ms

2 *

3 [AS4766] 112.174.88.17 206.285 ms

4 [AS4766] 112.174.91.45 213.255 ms

5 *

6 *

7 *

8 [AS4766] 211.217.66.82 217.436 ms

9 [AS9647] 202.14.90.137 103.779 ms

10 *

11 *

12 *

Measurement taken from

IPinfo ProbeNet in Jakarta, ID

On December 6th 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.

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