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IPv4 Classes

Type in the IPv4 ranges, default subnet, and CIDR notation for the subnet. Private classes can only be used on a LAN, while public addresses need to be registered with ICANN, more specifically, your Regional Internet Registry (RIR).
Quiz by JRBerger
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Last updated: May 7, 2023
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First submittedFebruary 2, 2021
Times taken42
Average score60.7%
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Hint
First IP
Last IP
Default Subnet Mask
CIDR
IPv4 Class A
1.0.0.0
126.255.255.255
255.0.0.0
/8
IPv4 Class B
128.0.0.0
191.255.255.255
255.255.0.0
/16
IPv4 Class C
192.0.0.0
223.255.255.255
255.255.255.0
/24
IPv4 Class D
224.0.0.0
239.255.255.255
 
 
IPv4 Class E
240.0.0.0
255.255.255.255
 
 
APIPA
169.254.0.0
169.254.255.255
255.255.0.0
/16
Loopback Address
127.0.0.1
 
 
 
Default Router IP
192.168.X.X
 
 
 
(Private) Class A
10.0.0.0
10.255.255.255
255.0.0.0
/8
(Private) Class B
172.16.0.0
172.31.255.255
255.255.0.0
/16
(Private) Class C
192.168.0.0
192.168.255.255
255.255.255.0
/24
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