4.21.0.0/16

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Summary

IP address summary information
ASNs	1
Countries	1
BGP Prefixes	1
Routers	69
Pingable IPs	681

United States
100.00%


4.21.0.0/24	United States100.00%	1	1	0
4.21.1.0/24	United States100.00%	1	1	0
4.21.2.0/24	United States100.00%	1	1	6
4.21.3.0/24	United States100.00%	1	1	3
4.21.4.0/24	United States100.00%	1	1	0
4.21.5.0/24	United States100.00%	1	1	0
4.21.6.0/24	United States100.00%	1	1	0
4.21.7.0/24	United States100.00%	1	1	0
4.21.8.0/24	United States100.00%	1	1	0
4.21.9.0/24	United States100.00%	1	1	0

Sub-ranges

Important routers in 4.21.0.0/16


4.21.25.86	Atlanta, United States	AS3356Level 3 Parent, LLC
4.21.29.130	Atlanta, United States	AS3356Level 3 Parent, LLC
4.21.23.86	Atlanta, United States	AS3356Level 3 Parent, LLC
4.21.29.114	Atlanta, United States	AS3356Level 3 Parent, LLC
4.21.27.105	Atlanta, United States	AS3356Level 3 Parent, LLC
4.21.30.158	Atlanta, United States	AS3356Level 3 Parent, LLC
4.21.144.158	Philadelphia, United States	AS3356Level 3 Parent, LLC
4.21.21.150	Nashville, United States	AS3356Level 3 Parent, LLC
4.21.27.142	Atlanta, United States	AS3356Level 3 Parent, LLC
4.21.23.218	Atlanta, United States	AS3356Level 3 Parent, LLC

Important routers in 4.21.0.0/16

Pingable IPs

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


4.21.29.33	AS3356Level 3 Parent, LLC	0.33ms from Atlanta, US
4.21.19.109	AS3356Level 3 Parent, LLC	0.35ms from Atlanta, US
4.21.20.13	AS3356Level 3 Parent, LLC	0.33ms from Atlanta, US
4.21.144.161	AS3356Level 3 Parent, LLC	0.47ms from Philadelphia, US
4.21.3.97	AS3356Level 3 Parent, LLC	0.47ms from Orlando, US
4.21.200.209	AS3356Level 3 Parent, LLC	0.62ms from Phoenix, US
4.21.203.113	AS3356Level 3 Parent, LLC	0.66ms from Phoenix, US
4.21.96.49	AS3356Level 3 Parent, LLC	2.54ms from Ashburn, US
4.21.23.65	AS3356Level 3 Parent, LLC	0.31ms from Atlanta, US
4.21.2.141	AS3356Level 3 Parent, LLC	0.36ms from Miami, US

Other Pingable IPs

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


41.200.164.96	AS36947Telecom Algeria	13.80ms from Algiers, DZ
20.229.168.64	AS8075Microsoft Corporation	0.30ms from Amsterdam, NL
99.86.174.112	AS16509Amazon.com, Inc.	0.87ms from Bengaluru, IN
75.66.228.192	AS7922Comcast Cable Communications, LLC	17.79ms from Dallas, US
217.175.1.208	AS25591BCLan LLC	10.66ms from Krasnodar, RU
149.96.189.112	AS397182SERVICENOW, INC.	0.26ms from Miami, US
85.19.25.192	AS25400Telia Norge AS	0.89ms from Oslo, NO
92.202.246.16	AS2527Sony Network Communications Inc.	1.61ms from Tokyo, JP
40.91.205.240	AS8075Microsoft Corporation	0.25ms from Amsterdam, NL
185.46.138.192	AS25291SysEleven GmbH	0.61ms from Berlin, DE

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 -m7 4.21.79.79

traceroute to 4.21.79.79 (4.21.79.79): 7 hops max, 52 byte packets

1 [AS31898] 140.91.254.11 0.113 ms

2 [AS12400] 212.199.130.114 29.252 ms

3 [AS12400] 212.199.130.113 2.107 ms

4 [AS3356] 212.133.114.163 54.46 ms

5 *

6 *

7 *

Measurement taken from

IPinfo ProbeNet in Jerusalem, IL

On July 12, 2026

Traceroute

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4.21.0.0/16

Summary

Sub-ranges

Important routers in 4.21.0.0/16

Important routers in 4.21.0.0/16

Pingable IPs

Other Pingable IPs

Pingable IPs

Traceroute

Traceroute

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Important routers in 4.21.0.0/16

Pingable IPs

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Traceroute

4.21.0.0/16

Summary

Statistics

Statistics

Sub-ranges

Sub-ranges

Important routers in 4.21.0.0/16

Important routers in 4.21.0.0/16

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 4.21.0.0/16

Pingable IPs

Other Pingable IPs

Traceroute