Clear all formatting between the last cell and the data. 1  Do one of the following: To select all columns to the right of the last column that contains data, click the first column heading, hold down CTRL, and then click the column headings of the columns that you want to select.
Find your IP range by examining your subnet mask. Most likely, if you are using a simple home network, your IP address begins with 192.168.0 and your mask is 255.255.255.0. This mask means that the address range 192.168.0.1 to 192.168.0.255 is available for assignment in your subnet. Show Comments.
Valid IP Ranges. Class A IP addresses are networks 1.0.0.0 through 127.0.0.0. Class B is networks 128.0.0.0 through 191.255.0.0. Class C is 192.0.0.0 through 223.255.255.0. Class A networks are identified by the first number, while Class B networks use the first two numbers and Class C the first three.