About IP Subnet & CIDR Network Calculator Studio
Comprehensive client-side IPv4 subnet and CIDR calculator for network engineers and cloud architects. Computes network address, broadcast address, usable host IP range, total and usable host count, dotted-decimal subnet mask, wildcard mask, 32-bit binary bitmask layout, and RFC 1918 private/public network scope classification. Zero server calls.
Key Capabilities & Features
- CIDR prefix slider from /0 to /32 with instant recalculation
- Network, broadcast, and first/last usable IP determination
- Wildcard mask calculation for Cisco ACLs and OSPF configs
- 32-bit binary layout with colored network vs host bits
- RFC 1918 private, public, loopback, and CGNAT classification
How to Use IP Subnet & CIDR Network Calculator Studio
Enter IPv4 Address
Type any valid IPv4 host address (e.g., 192.168.1.15).
Adjust CIDR Prefix
Drag the slider to pick your mask (/8 to /32).
Copy Subnet Specifications
Copy network address, usable host range, or complete CIDR summary.
Privacy & In-Browser Execution Guarantee
100% Client-Side. Your IP addresses and network topologies are never transmitted across the network.
Frequently Asked Questions
What is the difference between total hosts and usable hosts?
In standard IPv4 subnets (/30 and below), the first address is reserved as the Network ID and the last address is reserved as the Broadcast address, so usable hosts equal 2^(32-CIDR) - 2. Point-to-point /31 subnets (RFC 3021) allow 2 usable hosts without broadcast.