121.133.209.0/24

AS38412 · Gyeonggi-Do Icheon office of Education

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Summary

Country	South Korea
Domain	kt.com
ASN	AS38412
Parent Range	121.128.0.0/11
Registry	KRNIC
ID	121.133.209.0-121.133.209.255

WHOIS Details

inetnum:            121.133.209.0 - 121.133.209.255
descr:              Korea Telecom
network-type:       CUSTOMER
address:            KT Corporation jeongja-dong Bundang_gu, Seongnam-si Gyeonggi-do
zip-code:           463711
created:            2016-12-08
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:             kornet_ip@kt.com
source:             KRNIC

Overlapping Ranges

BGP prefixes that contain 121.133.209.0/24

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 121.133.0.0/16

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
121.133.198.0/24	AS38394	Korea Telecom	256
121.133.199.0/24	AS38395	Korea Telecom	256
121.133.203.0/24	AS38399	Korea Telecom	256

Hosted domains

There are no domains currently hosted on this ASN.

Hosted domains API

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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
100.27.85.120	AS14618 Amazon.com, Inc.	`0.52ms` from Ashburn, US
20.232.16.184	AS8075 Microsoft Corporation	`0.42ms` from Ashburn, US
67.203.100.72	AS11915 TPx Communications	`0.46ms` from Dallas, US
65.151.31.40	AS209 CenturyLink Communications, LLC	`0.82ms` from Denver, US
14.229.55.104	AS45899 VNPT Corp	`3.71ms` from Hanoi, VN
171.225.169.152	AS7552 Viettel Group	`11.06ms` from Ho Chi Minh City, VN
121.56.155.120	AS4134 CHINANET-BACKBONE	`7.47ms` from Hohhot, CN
223.241.232.216	AS4134 CHINANET-BACKBONE	`9.49ms` from Huai'an, CN
72.197.10.248	AS22773 Cox Communications Inc.	`6.96ms` from Los Angeles, US
201.121.205.200	AS8151 UNINET	`1.48ms` from Mexico City, MX
97.220.215.40	AS6167 Verizon Business	`16.59ms` from Miami, US
94.84.154.200	AS3269 Telecom Italia S.p.A.	`6.67ms` from Milan, IT
73.105.58.56	AS7922 Comcast Cable Communications, LLC	`4.69ms` from Orlando, US
126.142.107.232	AS17676 SoftBank Corp.	`3.89ms` from Osaka, JP
46.218.94.104	AS15557 Societe Francaise Du Radiotelephone - SFR SA	`1.14ms` from Paris, FR
203.235.27.232	AS9848 SEJONG NETWORKS	`7.07ms` from Seoul, KR
2.50.241.24	AS5384 Emirates Internet	`4.72ms` from Al Fujairah City, AE
34.21.122.120	AS396982 Google LLC	`0.13ms` from Ashburn, US
216.65.134.152	AS7029 Windstream Communications LLC	`0.81ms` from Ashburn, US
4.249.217.72	AS8075 Microsoft Corporation	`0.19ms` from Des Moines, US
54.74.131.88	AS16509 Amazon.com, Inc.	`0.22ms` from Dublin, IE
124.80.98.200	AS17849 SK Broadband Co Ltd	`2.20ms` from Incheon, KR
178.185.56.8	AS12389 PJSC Rostelecom	`1.00ms` from Krasnoyarsk, RU
81.154.23.24	AS2856 British Telecommunications PLC	`6.58ms` from London, GB
80.182.31.184	AS3269 Telecom Italia S.p.A.	`5.72ms` from Milan, IT

Traceroute

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

traceroute -a -n -q1 -f2 -m13 121.133.209.107

traceroute to 121.133.209.107 (121.133.209.107): 13 hops max, 52 byte packets

2 [AS3356] 4.16.21.77 0.541 ms

3 *

4 [AS3356] 4.68.37.206 40.833 ms

5 [AS4766] 112.174.89.249 629.112 ms

6 [AS4766] 112.174.91.217 165.261 ms

7 *

8 *

9 [AS4766] 112.189.143.238 184.366 ms

10 [AS38412] 124.138.123.193 172.087 ms

11 *

12 *

13 *

Measurement taken from

IPinfo ProbeNet in Tulsa, US

On March 13th 2026

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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