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The example below shows how to convert 192.168.2.81 to binary numbers.
1. On the left of the calculator, select Dec. Then enter the first decimal number of the IP address,
“192”. Select Bin and the number will be converted to binary number. Repeat the same pro-
cedure with the rest of decimal numbers. Remember to select Dec before entering the next
decimal number. Otherwise a decimal number cannot be entered. The table below shows the
binary representation of each decimal number.
Decimal Numbers Binary Numbers
192 11000000
168 10101000
2 10
81 1010001
2. Each binary number should have eight digits. If a binary number does not have eight digits,
please add leading zeros until it does. The binary number of each decimal number should be as
follows.
Decimal Numbers Binary Numbers
192 11000000
168 10101000
2 00000010
81 01010001
Therefore, the binary representation of IP address 192.168.2.81 is
11000000.10101000.00000010.01010001.
Menu Reference
Appendix B: Converting IP Addresses from Decimal to Binary
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