Subnet Calculator
IPv4 & IPv6 calculator, subnetter, and summarizer with CSV, print, and shareable links.
IP
—
CIDR / Mask
—
Network
—
Broadcast
—
First host
—
Last host
—
Usable hosts
—
Wildcard
—
Class
—
Private/Reserved
—
Mask (binary)
—
IP (binary)
—
Base
—
New prefix
—
Total subnets
—
Hosts / subnet
—
| # | Network | First | Last | Broadcast |
|---|
IP
—
Prefix
—
Network
—
Range
—
Addresses
—
Network (expanded)
—
IP (expanded)
—
IID (last 64b)
—
Base
—
New prefix
—
Total subnets (2^Δ)
—
Example size
—
| # | Network | Range |
|---|
Input blocks
—
Collapsed to
—
Coverage (IPs)
—
Min set
—
| # | CIDR | Range | Count |
|---|