Interactive CIDR Calculator
Enter any IPv4 address with a CIDR prefix (e.g., 192.168.1.0/24 or 10.0.0.0/16) to inspect netmask breakdown, usable IP range, host capacity, and wildcard mask:
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Client-Side CalculationInteractive CIDR & Subnet Range Calculator
Subnet Mask
255.255.255.0
Network Address
192.168.1.0
Broadcast Address
192.168.1.255
Usable Host Range
192.168.1.1 - 192.168.1.254
Calculated 100% locally in browser JS. No network latency.
CIDR Subnetting Theory
Classless Inter-Domain Routing (CIDR) replaces legacy Class A, B, and C network designation by appending a slash suffix (e.g. /24) indicating how many leading bits of an IP address belong to the network prefix.
💡Formula for Usable Hosts
For any CIDR prefix
/N, the total number of IP addresses is 2(32 - N). The number of usable hosts is 2(32 - N) - 2 (subtracting 1 for Network Address and 1 for Broadcast Address).Common Subnet Mask Table
| CIDR Prefix | Subnet Mask | Total Addresses | Usable Hosts |
|---|---|---|---|
| /24 | 255.255.255.0 | 256 | 254 |
| /16 | 255.255.0.0 | 65,536 | 65,534 |
| /30 | 255.255.255.252 | 4 | 2 (Point-to-Point Link) |
| /32 | 255.255.255.255 | 1 | 1 (Single Host) |
Terminal Command
$ ip route add 10.0.0.0/16 dev eth0
Adds a static Linux kernel routing entry for the 10.0.0.0/16 subnet over interface eth0.
Expected Output:
[Kernel Routing Table Updated] 10.0.0.0/16 dev eth0 proto kernel scope linkPrivacy & Browser Local Processing
ℹ️Zero Server Logging
TechSimpleHub network tools calculate subnet ranges, binary conversions, and wildcard masks 100% locally in your web browser. No IP addresses or internal network subnets are transmitted to external servers.
Video Walkthrough
YouTubeCIDR Subnetting & IP Address Ranges Explained
Watch on TechSimpleHub YouTubeClick to play