Ip Address Calculator
Free Ip address Calculator for networking. Enter parameters to get optimized results with detailed breakdowns. Get results you can export or share.
Formula
Network = IP AND Mask | Broadcast = Network OR Wildcard | Usable Hosts = 2^(32-CIDR) - 2
The network address is found by bitwise AND of the IP and subnet mask. The broadcast address is found by bitwise OR of the network address and wildcard mask (inverse of subnet mask). Usable hosts equal 2 raised to the number of host bits minus 2 (for network and broadcast addresses).
Worked Examples
Example 1: Home Network Subnet
Problem: Calculate network details for IP address 192.168.1.100 with subnet mask 255.255.255.0 (/24).
Solution: Network Address: 192.168.1.100 AND 255.255.255.0 = 192.168.1.0\nBroadcast Address: 192.168.1.0 OR 0.0.0.255 = 192.168.1.255\nHost bits = 32 - 24 = 8\nTotal addresses = 2^8 = 256\nUsable hosts = 256 - 2 = 254\nFirst host: 192.168.1.1\nLast host: 192.168.1.254\nWildcard mask: 0.0.0.255
Result: Network: 192.168.1.0/24 | Usable: 192.168.1.1 - 192.168.1.254 (254 hosts)
Example 2: Small Office Subnet
Problem: An office needs a subnet for 25 devices. Using 10.0.5.0 with mask 255.255.255.224 (/27), calculate the network details.
Solution: Network Address: 10.0.5.0 AND 255.255.255.224 = 10.0.5.0\nBroadcast Address: 10.0.5.0 OR 0.0.0.31 = 10.0.5.31\nHost bits = 32 - 27 = 5\nTotal addresses = 2^5 = 32\nUsable hosts = 32 - 2 = 30\nFirst host: 10.0.5.1\nLast host: 10.0.5.30\nWildcard mask: 0.0.0.31
Result: Network: 10.0.5.0/27 | Usable: 10.0.5.1 - 10.0.5.30 (30 hosts) | Sufficient for 25 devices
Frequently Asked Questions
What is the difference between network address and broadcast address?
The network address is the first address in a subnet, obtained by performing a bitwise AND between the IP address and subnet mask. It identifies the subnet itself and cannot be assigned to any device. The broadcast address is the last address in a subnet, obtained by setting all host bits to 1. It is used to send data to all devices on the subnet simultaneously. For the 192.168.1.0/24 network, the network address is 192.168.1.0 and the broadcast address is 192.168.1.255. These two addresses reduce the usable host count by 2. In a /24 subnet with 256 total addresses, only 254 are usable for devices (1 through 254). Understanding these addresses is critical for proper network configuration and troubleshooting.
What are private IP address ranges and when are they used?
Private IP addresses are ranges reserved by RFC 1918 for use within internal networks. They are not routable on the public internet. The three private ranges are: 10.0.0.0/8 (10.0.0.0 to 10.255.255.255, providing over 16 million addresses), 172.16.0.0/12 (172.16.0.0 to 172.31.255.255, providing about 1 million addresses), and 192.168.0.0/16 (192.168.0.0 to 192.168.255.255, providing about 65,000 addresses). Home routers typically use the 192.168.x.x range. Enterprises often use the 10.x.x.x range for their larger internal networks. Private addresses are translated to public addresses using NAT (Network Address Translation) when communicating with the internet. This system conserves the limited IPv4 address space by allowing millions of internal devices to share a single public IP.
How accurate are the results from Ip Address Calculator?
All calculations use established mathematical formulas and are performed with high-precision arithmetic. Results are accurate to the precision shown. For critical decisions in finance, medicine, or engineering, always verify results with a qualified professional.
How do I get the most accurate result?
Enter values as precisely as possible using the correct units for each field. Check that you have selected the right unit (e.g. kilograms vs pounds, meters vs feet) before calculating. Rounding inputs early can reduce output precision.
Is Ip Address Calculator free to use?
Yes, completely free with no sign-up required. All calculators on NovaCalculator are free to use without registration, subscription, or payment.
Can I use the results for professional or academic purposes?
You may use the results for reference and educational purposes. For professional reports, academic papers, or critical decisions, we recommend verifying outputs against peer-reviewed sources or consulting a qualified expert in the relevant field.