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.
Any address whose first octet is in the range 128 to 191 is a Class B address. Class CâThe first three octets denote the network address, and the last octet is the host portion. The first octet range of 192 to 223 is a Class C address.Class DâUsed for multicast.Multicast IP addresses have their first octets in the range 224 to 239. Class EâReserved for future use and includes the range of addresses with a first octet from 240 to 255.he following are the classes of IP addresses. Class AâThe first octet denotes the network address, and the last three octets are the host portion. Any IP address whose first octet is between 1 and 126 is a Class A address.