IP Subnet Calculator
Calculate subnet masks, network ranges, and IP addressing information instantly.
Subnet Calculation Results
Network Information
IP Address
Network Address
Broadcast Address
Subnet Mask
Wildcard Mask
CIDR Notation
Host Information
Total Hosts
Usable Hosts
First Usable IP
Last Usable IP
IP Class
IP Type
Binary Representation
IP Address:
Subnet Mask:
Quick Reference: Common Subnet Masks
| CIDR | Subnet Mask | Usable Hosts | Common Use |
|---|---|---|---|
| /24 | 255.255.255.0 | 254 | Small network |
| /25 | 255.255.255.128 | 126 | Department |
| /26 | 255.255.255.192 | 62 | Small office |
| /27 | 255.255.255.224 | 30 | Point-to-point |
| /30 | 255.255.255.252 | 2 | Router links |