IP Subnet Calculator

Network Configuration

Network Address

Mask bits

Subnet Results

Subnet Address	Subnet Mask	Address Range	Usable IPs	Hosts	Network Name	Divide	Join
192.168.0.0/16	192.168.0.0 - 192.168.255.255	192.168.0.1 - 192.168.255.254	65534		/16

Understanding Subnetting and IP Addresses

What is Subnetting?

Subnetting is the practice of dividing a large network into smaller, more manageable networks called subnets. This process helps improve network performance, security, and management by creating logical divisions within a network.

Key Concepts in Subnetting:

Subnet Mask: A 32-bit number that determines which portion of an IP address belongs to the network and which belongs to the host
Network Address: The first address in a subnet, representing the subnet itself
Broadcast Address: The last address in a subnet, used for broadcasting messages to all hosts in the subnet
Host Range: The usable IP addresses available for devices within the subnet
CIDR Notation: A compact representation of subnet masks (e.g., /24 for 255.255.255.0)

Benefits of Using a Subnet Calculator:

Accuracy: Eliminates human error in binary calculations
Efficiency: Saves time compared to manual calculations
Planning: Helps design optimal network architectures
Documentation: Provides clear records for network administration
Verification: Double-checks existing network configurations

Common Use Cases:

Network design and planning
IP address allocation
Network segmentation for security
VLAN configuration
DHCP scope planning
Network troubleshooting

Pro Tip:

When planning your network, always consider future growth. It's better to allocate more IP addresses than you currently need rather than having to redesign your network later.