Converting a 32-Bit Binary Address

Converting a 32-Bit Binary Address to Dotted Decimal Format

Following is an example showing how to convert a 32-bit binary IP address to dotted decimal format.

Convert the binary address 01011001000111011100110000011000.

1. First break the address into 8-bit octets:

   Octet 1: 01011001

   Octet 2: 00011101

   Octet 3: 11001100

   Octet 4: 00011000

2. Convert each octet to a decimal number.

   Table 4.2. Converting a Binary Address to Dotted Decimal Format

   Octet	Binary Value	Calculation	Decimal Value
   1	01011001	1+8+16+64	89
   2	00011101	1+4+8+16	29
   3	11001100	4+8+64+128	204
   4	00011000	8+16	24

3. Write out the decimal equivalent values in order from left to right. Separate the values with periods:

   The address is: 89.29.204.24