Convert between CIDR notation and subnet masks
A CIDR calculator translates Classless Inter-Domain Routing notation into readable network details. Enter 10.0.0.0/16 or 2001:db8::/48 and the tool instantly shows the network range, subnet mask, wildcard, and host totals. It combines the jobs of a cidr block calculator, subnet calculator cidr, and cidr range calculator into one friendly workflow.
Because everything happens locally in your browser, the cidr ip calculator is safe for production planning. You can compare IPv4 and IPv6 blocks, perform classless subnet calculations, and document ranges for cloud or on-prem networks without touching spreadsheets.
Pick CIDR → Range, Range → CIDR, or Mask → CIDR. Each mode covers a common request like convert subnet mask to cidr or calculate cidr from ip range.
Paste a prefix, start/end IPs, or a dotted mask. The cidr ip calculator validates the format instantly.
See the network range, broadcast, host count, and binary representation. Copy the output into tickets, runbooks, or AWS/Azure templates.
Convert cidr to ip range or mask to cidr in a click with no manual math.
Great for AWS VPC cidr calculator and Azure cidr planning workflows.
Use the same cidr calculator for dual-stack environments.
All calculations stay in your browser—no addresses are uploaded.
Results include wildcard masks, host counts, and cidr range lookup data.
Natural sentences explain what’s happening so teams stay aligned.
Swap between cidr to ip converter, ip range to cidr converter, and subnet mask to cidr converter without reloading.
See start/end IPs, number of hosts, and wildcard masks for every cidr block calculation.
Plan CIDR blocks for AWS, Azure, or GCP and avoid overlaps before deployment.
Use the data to check ip in cidr lists and verify firewall policies.
No cryptic tables—just clean sentences your team can understand.
Jump to IPv4, IPv6, or wildcard calculators for further subnetting.
Design AWS or Azure CIDR blocks, split subnets, and document cidr range calculations for approvals.
Convert ip range to cidr during WAN upgrades or MPLS migrations.
Check cidr ranges against firewall lists and avoid overlapping policies.
Practice cidr formula problems, VLSM exercises, and ip cidr lookup drills.
Compare legacy networks to new dual-stack designs with the cidr address calculator.