Free Online Tool
Subnet Calculator
Calculate network addresses, broadcast addresses, and host ranges from CIDR notation.
About
About Subnet Calculator
Calculate network addresses, broadcast addresses, and host ranges from CIDR notation. This free online tool runs entirely in your browser — no data is sent to any server. Bookmark it and use it anytime you need it.
Upgrade to Pro
Unlimited usage, bulk processing, API access & priority support — €9/month
Free
- ✓ 5 uses per day
- ✓ Basic features
- ✗ No bulk processing
- ✗ No API access
Pro
- ✓ Unlimited uses
- ✓ All features unlocked
- ✓ Bulk processing
- ✓ API access
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