Calculate IP Subnets & CIDR Fast & Accurately
Calculate IPv4 subnet masks, usable host ranges, broadcast addresses, and binary representations in real time.
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How to Use IP Address & Subnet CIDR Calculator
- 1
Enter IPv4 Address
Type your IPv4 address (e.g. 192.168.1.1 or 10.0.0.1) into the input box.
- 2
Adjust Subnet Mask CIDR
Drag the smooth prefix slider or select any CIDR prefix from /0 to /32.
- 3
Inspect Network Ranges & Copy
Review network address, usable host ranges, broadcast IP, and binary breakdowns.
Frequently Asked Questions
CIDR (Classless Inter-Domain Routing) notation specifies an IP address and its associated routing prefix (e.g. /24 indicates 24 network bits and 8 host bits, yielding a 255.255.255.0 netmask).
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