🌐 Subnet Calculator & IP Address Calculator
Calculate Subnet Masks, CIDR Notation, IP Ranges
Subnet & IP Calculator
What is a Subnet Mask?
A subnet mask is a 32-bit number that separates IP addresses into network and host portions.
Example
IP: 192.168.1.50
Mask: 255.255.255.0
Network: 192.168.1.0 | Host: 50
CIDR Notation
CIDR (Classless Inter-Domain Routing) represents network bits after a slash.
| CIDR | Subnet Mask | Usable Hosts |
|---|---|---|
| /8 | 255.0.0.0 | 16,777,214 |
| /16 | 255.255.0.0 | 65,534 |
| /24 | 255.255.255.0 | 254 |
| /26 | 255.255.255.192 | 62 |
| /30 | 255.255.255.252 | 2 |