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.
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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.
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RESULT / EXPLAINED
Exact address math, with operational claims kept separate.
The network-planning tools perform deterministic IPv4/IPv6 arithmetic locally. They describe address-space relationships, not whether a network is deployed correctly.
What is exact
Network boundaries, containment, ranges, prefix lengths, masks and exact aggregation/splitting results come from deterministic address arithmetic.
Canonical output
Normalized network values remove host bits where appropriate. Containment means one calculated address range fully includes another; overlap means ranges intersect.
No live network validation
The browser does not confirm routing tables, VLANs, DHCP, firewall rules, ownership, reachability or whether the calculated prefix is appropriate for your deployment.
Before deployment
Use the arithmetic result as a planning input, then verify it against the real network design, routing/firewall policy and authoritative address allocation.
0BPS SHOWS MEASURED OR CALCULATED FACTS SEPARATELY FROM INTERPRETATION. WHERE A RESULT IS ADVISORY, ESTIMATED OR DESTINATION-SPECIFIC, THE LIMIT IS STATED IN THE TOOL.
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.