Simplify network management with free IP Subnet Calculators. Easily configure subnets, find usable host ranges, and ensure accurate network addressing.
Get results in seconds, boosting efficiency for network administrators and IT professionals.
Subnetting a network is the process of dividing it logically. Subnetting is the process of separating a network into smaller sections known as subnets.
IP Subnet Calculator
Subnetting is applicable to IP addresses since it is done by borrowing bits from the IP address’s host section. In a sense, the IP address includes three parts: the network part, the subnet part, and the host part.
Subnet Calculator
CIDR
CIDR, or Classless Inter Domain Routing, allows you to borrow bits from the Host part of an IP address and use them as Network in Network, or Subnet. Subnetting allows a single Class A IP address to be used to create smaller sub-networks, which improves network administration capabilities.
IP Subnetting Calculator
Our Calculator give you exact no of Hosts , Network, First IP . Last IP and Broadcast IP of a given network .
Keyword: IP address Subnet, Network IP address, Visual Subnet Calculator , subnet calculator cheat sheet
| fix size | Network mask | Usable hosts per subnet |
| /1 | 128.0.0.0 | 2,147,483,646 |
| /2 | 192.0.0.0 | 1,073,741,822 |
| /3 | 224.0.0.0 | 536,870,910 |
| /4 | 240.0.0.0 | 268,435,454 |
| /5 | 248.0.0.0 | 134,217,726 |
| /6 | 252.0.0.0 | 67,108,862 |
| /7 | 254.0.0.0 | 33,554,430 |
| Class A | ||
| /8 | 255.0.0.0 | 16,777,214 |
| /9 | 255.128.0.0 | 8,388,606 |
| /10 | 255.192.0.0 | 4,194,302 |
| /11 | 255.224.0.0 | 2,097,150 |
| /12 | 255.240.0.0 | 1,048,574 |
| /13 | 255.248.0.0 | 524,286 |
| /14 | 255.252.0.0 | 262,142 |
| /15 | 255.254.0.0 | 131,070 |
| Class B | ||
| /16 | 255.255.0.0 | 65,534 |
| /17 | 255.255.128.0 | 32,766 |
| /18 | 255.255.192.0 | 16,382 |
| /19 | 255.255.224.0 | 8,190 |
| /20 | 255.255.240.0 | 4,094 |
| /21 | 255.255.248.0 | 2,046 |
| /22 | 255.255.252.0 | 1,022 |
| /23 | 255.255.254.0 | 510 |
| Class C | ||
| /24 | 255.255.255.0 | 254 |
| /25 | 255.255.255.128 | 126 |
| /26 | 255.255.255.192 | 62 |
| /27 | 255.255.255.224 | 30 |
| /28 | 255.255.255.240 | 14 |
| /29 | 255.255.255.248 | 6 |
| /30 | 255.255.255.252 | 2 |
| /31 | 255.255.255.254 | 0 |
| /32 | 255.255.255.255 | 0 |
