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Subnet Calculator
Network & Ops · Free Online Tool
Calculate IPv4 subnet details from CIDR.
By CoderNewbie Team
Examples:
Subnet Details — 192.168.1.0/24
- Network Address
- 192.168.1.0
- Broadcast Address
- 192.168.1.255
- Subnet Mask
- 255.255.255.0
- CIDR Notation
- /24
- Wildcard Mask
- 0.0.0.255
- First Usable Host
- 192.168.1.1
- Last Usable Host
- 192.168.1.254
- Total IP Addresses
- 256
- Usable Hosts
- 254
How to Use Subnet Calculator
- 1Enter the URL, IP address, or network parameter to look up.
- 2Click the lookup or test button.
- 3Review the detailed results in the output panel.
- 4Use the information for your network operations.
Features
- ✓100% free — no signup, no subscription, no ads
- ✓Runs entirely in your browser — data never leaves your device
- ✓Fast and lightweight — instant results
- ✓Cross-platform — works on desktop, tablet, and mobile
Frequently Asked Questions
Are network lookups real-time?
Yes, IP lookups, DNS queries, and HTTP tests perform live network requests to provide current data.
Is my IP address logged?
The IP Lookup tool queries public geolocation APIs. We do not store your IP address or lookup history.
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Learn the concept
Learn the concept
Understand the programming ideas behind this tool.