Subnet Calculator
IPv4 network range, mask, hosts, and binary — calculated as you type. Click any value to copy.
Try
192.168.1.0/24 or 10.0.0.0 255.255.255.0Network
Broadcast
First Host
Last Host
Usable Hosts
Total Addresses
Subnet Mask
Wildcard Mask
CIDR
Binary Mask
Download a file with Export, or copy a row with Copy with headers (fresh sheet) or Copy values only (existing sheet).
CIDR Reference
Click any row to load that prefix into the calculator above. Uses your current IP, or 0.0.0.0 if blank.
| CIDR | Subnet Mask | Total Addresses | Usable Hosts |
|---|
Network & Security Architect
Need help on a network or security project?
I take consulting engagements for network design, segmentation, and security architecture reviews. Reach out to scope something — direct, or via Upwork.