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ip address range

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NetMan1958

is that the IPv4 classes were derived by the following rules:
Class A - Always begins with a 0 (zero) when expressed in binary - So that yields
00000001 (1) to 01111111 (127)

Class B - Always begins with 10 (0ne-zero) when expressed in binary - So that yields
10000000 (128) to 10111111 (191)

Class C - Always begins with 110 (One-one-zero) when expressed in binary - So that yields
11000000 (192) to 11011111 (223)

Class D - Always begins with 1110 (one-one-one-zero) when expressed in binary - So that yields 11100000 (224) to 11101111 (239)

Class E - Always begins with 1111 (0ne-one-one-one) when expressed in binary - So that yields 11110000 (240) to 11111111 (255)