IP Range Calculator
Total addresses and range between two IPv4 addresses.
Enter your values
ⓘ Live results
Results
- Total addresses
- 254
- Range
- 10.0.0.1 - 10.0.0.254
- Nearest CIDR block size
- 2^8 = 256
Quick answer
Address count = end IP numeric value - start IP numeric value + 1.
count = endNum - startNum + 1
How to use the IP Range Calculator
- 1Enter the start and end IPv4 addresses of the range.
- 2The calculator converts both to numeric form and finds the difference.
- 3Read the total number of addresses spanned.
Worked example
Using the values the calculator loads with:
Inputs
- Start IP10.0.0.1
- End IP10.0.0.254
Results
- Total addresses254
- Range10.0.0.1 - 10.0.0.254
- Nearest CIDR block size2^8 = 256
Frequently asked questions
Is this the same as usable hosts?
This counts every address in the range; subtract 2 if network/broadcast addresses should be excluded.
What if the range doesn't fit a clean CIDR block?
The nearest power-of-two block size is shown, but you may need multiple CIDR blocks to cover an odd range exactly.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.