121.172.0.0/16

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Summary

IP address summary information
ASNs	2
Countries	1
BGP Prefixes	2
Routers	54
Pingable IPs	40,479

South Korea
100.00%


121.172.0.0/24	South Korea100.00%	1	1
121.172.1.0/24	South Korea100.00%	1	1
121.172.2.0/24	South Korea100.00%	1	1
121.172.3.0/24	South Korea100.00%	1	1
121.172.4.0/24	South Korea100.00%	1	1
121.172.5.0/24	South Korea100.00%	1	1
121.172.6.0/24	South Korea100.00%	1	1
121.172.7.0/24	South Korea100.00%	1	1
121.172.8.0/24	South Korea100.00%	1	1
121.172.9.0/24	South Korea100.00%	1	1

Sub-ranges

Important routers in 121.172.0.0/16


121.172.176.114	Incheon, South Korea	AS4766Korea Telecom
121.172.172.10	Incheon, South Korea	AS4766Korea Telecom
121.172.172.146	Incheon, South Korea	AS4766Korea Telecom
121.172.244.46	Incheon, South Korea	AS4766Korea Telecom
121.172.244.42	Incheon, South Korea	AS4766Korea Telecom
121.172.114.189	Incheon, South Korea	AS4766Korea Telecom
121.172.172.62	Incheon, South Korea	AS4766Korea Telecom
121.172.227.115	Incheon, South Korea	AS4766Korea Telecom
121.172.244.14	Incheon, South Korea	AS4766Korea Telecom
121.172.253.13	Incheon, South Korea	AS4766Korea Telecom

Important routers in 121.172.0.0/16

Pingable IPs

40,479 IPs in this range replied to an ICMP ping during our most recent internet scan. Learn more.


121.172.4.51	AS4766Korea Telecom	0.85ms from Incheon, KR
121.172.55.195	AS4766Korea Telecom	0.68ms from Incheon, KR
121.172.96.10	AS4766Korea Telecom	0.99ms from Incheon, KR
121.172.0.124	AS4766Korea Telecom	2.22ms from Incheon, KR
121.172.58.1	AS4766Korea Telecom	1.16ms from Incheon, KR
121.172.64.243	AS4766Korea Telecom	0.74ms from Incheon, KR
121.172.52.29	AS4766Korea Telecom	0.78ms from Incheon, KR
121.172.50.217	AS4766Korea Telecom	0.79ms from Incheon, KR
121.172.98.39	AS4766Korea Telecom	0.75ms from Incheon, KR
121.172.49.164	AS4766Korea Telecom	0.87ms from Incheon, KR

Other Pingable IPs

Below is a random selection of 25 IPs that replied to an ICMP ping during our most recent internet scan.


119.27.184.64	AS45090Shenzhen Tencent Computer Systems Company Limited	0.82ms from Chengdu, CN
34.28.97.160	AS396982Google LLC	0.12ms from Council Bluffs, US
86.159.56.208	AS2856British Telecommunications Limited	3.79ms from London, GB
63.199.113.144	AS7018AT&T Enterprises, LLC	1.70ms from Los Angeles, US
80.181.101.192	AS3269Telecom Italia S.p.A.	6.78ms from Naples, IT
39.88.221.176	AS4837CHINA UNICOM China169 Backbone	2.43ms from Qingdao, CN
180.182.152.0	AS17839LG HelloVision Corp.	1.48ms from Seoul, KR
18.141.19.16	AS16509Amazon.com, Inc.	0.12ms from Singapore, SG
13.63.10.208	AS16509Amazon.com, Inc.	0.09ms from Stockholm, SE
179.208.203.224	AS28573Claro NXT Telecomunicacoes Ltda	6.61ms from São Paulo, BR

Pingable IPs

Traceroute

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

$ traceroute -a -n -q1 -f5 121.172.196.131

traceroute to 121.172.196.131 (121.172.196.131): 64 hops max, 52 byte packets

5 [AS3491] 63.216.242.33 1.355 ms

6 [AS3491] 63.218.140.78 1.134 ms

7 [AS3491] 63.222.57.230 25.614 ms

8 [AS4766] 112.174.86.205 25.996 ms

9 [AS4766] 112.174.47.154 32.408 ms

10 *

11 [AS4766] 112.190.72.78 32.946 ms

12 [AS4766] 121.172.196.131 34.171 ms

Measurement taken from

IPinfo ProbeNet in Tokyo, JP

On July 12, 2026

Traceroute

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121.172.0.0/16

Summary

Sub-ranges

Important routers in 121.172.0.0/16

Important routers in 121.172.0.0/16

Pingable IPs

Other Pingable IPs

Pingable IPs

Traceroute

Traceroute

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Important routers in 121.172.0.0/16

Pingable IPs

Other Pingable IPs

Traceroute

121.172.0.0/16

Summary

Statistics

Statistics

Sub-ranges

Sub-ranges

Important routers in 121.172.0.0/16

Important routers in 121.172.0.0/16

Pingable IPs

Other Pingable IPs

Pingable IPs

Traceroute

Traceroute

An API built with users in mind: reliable, accurate, and easy-to-use

Our IP tools

What is my IP?

Map IPs

Summarize IPs

Statistics

Sub-ranges

Important routers in 121.172.0.0/16

Pingable IPs

Other Pingable IPs

Traceroute