21.0.0.0/8

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Summary

IP address summary information
ASNs	1
Countries	1
BGP Prefixes	5
Routers	4
Pingable IPs	1

United States
100.00%


21.0.0.0/16	United States100.00%	1	1	1
21.1.0.0/16	United States100.00%	1	1	0
21.2.0.0/16	United States100.00%	1	1	0
21.3.0.0/16	United States100.00%	1	1	0
21.4.0.0/16	United States100.00%	1	1	0
21.5.0.0/16	United States100.00%	1	1	0
21.6.0.0/16	United States100.00%	1	1	0
21.7.0.0/16	United States100.00%	1	1	0
21.8.0.0/16	United States100.00%	1	1	0
21.9.0.0/16	United States100.00%	1	1	0

Sub-ranges

Important routers in 21.0.0.0/8


21.252.32.1	Columbus, United States	AS749United States Department of Defense (DoD)
21.2.186.253	Columbus, United States	AS749United States Department of Defense (DoD)
21.22.23.3	Columbus, United States	AS749United States Department of Defense (DoD)
21.21.21.14	Columbus, United States	AS749United States Department of Defense (DoD)

Important routers in 21.0.0.0/8

Pingable IPs

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


21.21.21.1	AS749United States Department of Defense (DoD)	23.58ms from Fortaleza, BR

Other Pingable IPs

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


64.40.71.104	AS19901Brightspeed	8.16ms from Ashburn, US
67.159.69.184	AS13371Duke University	14.02ms from Atlanta, US
175.152.223.184	AS4837CHINA UNICOM China169 Backbone	3.56ms from Chengdu, CN
142.204.146.152	AS393238ImOn Communications, LLC	11.88ms from Chicago, US
76.141.88.24	AS7922Comcast Cable Communications, LLC	7.30ms from Chicago, US
108.130.127.24	AS16509Amazon.com, Inc.	0.49ms from Dublin, IE
157.156.97.184	AS17816China Unicom IP network China169 Guangdong province	5.91ms from Guangzhou, CN
79.77.20.88	AS13285TalkTalk Communications Limited	8.17ms from London, GB
20.68.237.104	AS8075Microsoft Corporation	0.21ms from London, GB
89.96.226.8	AS12874Fastweb SpA	8.36ms from Milan, IT

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 -f2 -m8 21.65.223.234

traceroute to 21.65.223.234 (21.65.223.234): 8 hops max, 52 byte packets

2 [AS749] 11.73.14.117 2.187 ms

3 [AS749] 11.110.76.29 0.253 ms

4 *

5 [AS749] 11.94.155.97 1.079 ms

6 *

7 *

8 *

Measurement taken from

IPinfo ProbeNet in Guangzhou, CN

On July 13, 2026

Traceroute

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

Discover why industry-leading companies around the globe love our data. IPinfo's accurate insights fuel use cases from cybersecurity, data enrichment, web personalization, and much more.

21.0.0.0/8

Summary

Sub-ranges

Important routers in 21.0.0.0/8

Important routers in 21.0.0.0/8

Pingable IPs

Other Pingable IPs

Pingable IPs

Traceroute

Traceroute

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

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Important routers in 21.0.0.0/8

Pingable IPs

Other Pingable IPs

Traceroute

21.0.0.0/8

Summary

Statistics

Statistics

Sub-ranges

Sub-ranges

Important routers in 21.0.0.0/8

Important routers in 21.0.0.0/8

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 21.0.0.0/8

Pingable IPs

Other Pingable IPs

Traceroute