Type your subnet mask into cells B1 through B4, tying each byte into a separate cell. Continuing the example, type "255" into cell B1, "255" into B2, "255" into B3 and "224" into B4.

We found several utilities to help calculate IP subnets, subnet ranges, and CIDR addressing. IP Subnet Calculator (free) is a good, basic subnet calculator that shows available subnets based on IP ...

I have an Excel spreadsheet containing IP addresses and subnet masks. I need to derive the subnet of each IP address in the spreadsheet.Example: IP (column A): 10.1.230.84, Subnet Mask (column B ...

Advanced Subnet Calculator (free) provides subnet calculations, does host lookups, and supplies basic whois information on the service provider for a specific IP address. Be prepared for a big ...

You can easily convert a subnet mask into a wildcard mask. A wildcard mask is simply all the 1s in a subnet mask (when in binary form) turned into 0s, and all the 0s turned into 1s. Here's an example: ...

The second part of a TCP/IP address that defines the subnetwork in which the device resides. The subnet ID number is shared with the host ID. See subnet mask and subnet mask tables. THIS ...