IPv4 Subnet Calculator
Calculate network addresses, subnet masks, usable hosts, and CIDR notation
Network Parameters
Usable IP Range
—
—
Network Address
—
Subnet Mask
—
Broadcast Address
—
Usable Hosts
—
How to Use the IPv4 Subnet Calculator
- Input IP Address: Enter any valid IPv4 address (e.g., 10.0.0.1 or 192.168.1.1).
- Select Subnet Mask: Choose a prefix length from /1 to /32. Standard home networks usually use /24 (255.255.255.0).
- Calculate Network Specs: Click “Calculate Subnet Details” to obtain network addresses, host ranges, and broadcast boundaries.
Key IPv4 Subnetting Concepts
1. Network Address:
Network Address = IP Address AND Subnet Mask
2. Broadcast Address:
Broadcast Address = Network Address OR (NOT Subnet Mask)
3. Usable Host Calculation:
Usable Hosts = 2^(32 – Prefix Length) – 2
Frequently Asked Questions (FAQ)
Why subtract 2 from total host capacity?
In standard IPv4 subnets, two addresses are reserved for specific networking tasks: the first address serves as the Network Address, and the last address acts as the Broadcast Address.
What is CIDR Notation?
Classless Inter-Domain Routing (CIDR) represents a subnet mask as a slash followed by the number of leading 1-bits in the binary mask (e.g., /24 equals 255.255.255.0).
✨ You Might Also Like
🏡 Mortgage Calculator
Estimate monthly home loan payments and interest rates.
Try Tool →
🧬 BMI Calculator
Assess your Body Mass Index and healthy weight range.
Try Tool →
٪ Percentage Tool
Quickly compute percentages, increases, and decreases.
Try Tool →
📅 Age Calculator
Find your exact age down to hours and minutes.
Try Tool →
🌙 Zakat Calculator
Calculate obligatory Zakat according to Islamic rules.
Try Tool →