
| IP | Mask | First | Last | Note |
| {y} |

Calculate an IP Address Range with a Subnet Mask
Network administrators often need to know an IP address range, which they can calculate from the IP address and the subnet mask.
This online tool automatically calculates the first and the last address of a range.
Automatic calculation
Enter an IP address and then the subnet mask. If there is no error, the IP address range appears along with the magic number.
Error handling
Error messages are displayed automatically when needed.
Why calculate the range from the subnet mask?
This tool quickly calculates the range of an IP address associated with a network mask. You can also use it for subnetting.
Subnetting example
A network administrator wants to know the range of the address 192.168.160.5 associated with the subnet mask 255.255.192.0!
The address range starts at 192.168.128.1 and ends at 192.168.191.254. Calculating a range is very quick and easy with this online tool.
Keyboard shortcuts
m ⇝ Reset
f ⇝ Save
Results history
The Save button records the results in a structured table that can be exported in PDF or CSV format.