Which IPv4 address range is correctly classified as Class A?
128.0.0.0 to 191.255.255.255
192.0.0.0 to 223.255.255.255
1.0.0.0 to 126.255.255.255
127.0.0.0 to 127.255.255.255
Class A addresses are designed for very large networks, with a default subnet mask of 255.0.0.0. They start with a first octet from 1 to 126. This allows for a large number of possible hosts on each network, suitable for networks with many devices.
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