Subnet calculator
Discover our **Subnet Calculator**, a free and customizable online tool designed to simplify your networking tasks. Easily calculate subnets while ensuring secure password management for your projects. Start optimizing your network today with this user-friendly solution!
Classful Network
| Class | Leading bits | Host Address Range | Number of Networks | Notation CIDR | Default Netmask |
|---|---|---|---|---|---|
| Class A | 0 | 0.0.0.0 - 127.255.255.255 | 128 | /8 | 255.0.0.0 |
| Class B | 10 | 128.0.0.0 - 191.255.255.255 | 16384 | /16 | 255.255.0.0 |
| Class C | 110 | 192.0.0.0 - 223.255.255.255 | 2097152 | /24 | 255.255.255.0 |
| Class D (multicast) | 1110 | 224.0.0.0 - 239.255.255.255 | not defined | not defined | |
| Class E (reserved) | 1111 | 240.0.0.0 - 255.255.255.255 | not defined | not defined |
Non-routable networks
The folowing addresses are reseved for private networks:
172.16.0.0 to 172.31.255.255 (172.16 / 12 prefix)
192.168.0.0 to 192.168.255.255 (192.168 / 16 prefix)
Special cases
127.0.0.0 to 127.255.255.255 (LoopBack)
169.254.0.0 to 169.254.255.255 (undeclared hosts)
224.0.0.0 to 239.255.255.255 (Multicast)
This ip address calculator takes IPv4 address and subnet mask or CIDR then calculates and converts to binary ip address, the network address, broadcast address (broadcast), inverse netmask (Cisco wildcard mask), CIDR(Mask Bits), network mask, number of hosts, maximum number of sub-networks, ip range calculator : first and last host address. It is also intended to be a very good educational tool to verify the results and understand the binary values.
Reference : wikipedia: classful network
Discover an advanced online subnet calculator designed to simplify IP address management. Effortlessly calculate first, last, and broadcast IP addresses along with wildcard masks and netmasks. Convert between CIDR notation and hexadecimal formats while obtaining the network ID for any given IP address. This powerful tool also includes an easy-to-use binary converter that transforms your IP addresses into their binary equivalents, providing a comprehensive solution for networking professionals and enthusiasts alike. Enhance your understanding of subnets with accurate calculations at your fingertips—ideal for both educational purposes and practical applications in network design or troubleshooting scenarios.