Networking & DevOps4 min read•Updated 2026-09-04
What is a /24 Subnet? CIDR Mask, Usable IPs, and Calculation
Understand 192.168.1.0/24: why it provides 256 total IP addresses, 254 usable hosts, and a 255.255.255.0 mask.
MX
MultiToolX Technical Team
Cloud & Network Architecture
Key Takeaways
- /24 means the first 24 bits of the 32-bit IPv4 address belong to the Network Prefix.
- Subnet Mask: 255.255.255.0. Total IP addresses: 2^(32 - 24) = 2^8 = 256.
- Usable Hosts: 254 (Host .0 is the Network ID, Host .255 is the Broadcast Address).
1. Why /24 is the Most Common Local Subnet
Almost every home router and small office network uses a /24 subnet (e.g. 192.168.1.0/24). It provides an easy-to-remember address pool of 254 connectable devices (smartphones, laptops, IoT gadgets, printers) without complex IP routing.
Frequently Asked Questions
Can I assign .0 or .255 to my laptop?
No. The .0 address identifies the subnet itself, and .255 sends packets to all devices on the subnet (broadcast).
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