CALCULATE / RANGE0BPS / MODULE
IPV4 RANGE → CIDR
Convert an IPv4 start/end range into the smallest exact set of aligned CIDR blocks. All address math stays in this browser.
EXAMPLES
The output is an exact cover: no generated block includes an address outside the entered range. The range is calculated locally and is not submitted to 0bps.
REFERENCE / FAQ
COMMON QUESTIONS
How does range-to-CIDR conversion work?
The calculator finds the largest correctly aligned CIDR block that fits inside the remaining address range, then repeats until the exact range is covered.
Does the output include addresses outside my range?
No. The generated CIDR list is an exact cover of the entered start and end addresses.
Is the address range sent to 0bps?
No. IPv4 range arithmetic runs locally in your browser.
The calculator produces the smallest aligned CIDR blocks that exactly cover the entered IPv4 range.
Start/end addresses are parsed and summarized in the browser; they are not submitted to 0bps.
PRACTICAL / EXAMPLES
PUT THE NUMBER IN CONTEXT.
Short examples using the same units and assumptions as this module.
This exact range collapses to one block: 192.168.1.0/24.
An unaligned range needs several CIDR blocks so no address outside the range is included.