IPv4 Network
RFC 1519 • VLSM • Instant Evaluation
CIDR & VLSM Visual Calculator
Calculate subnet masks, wildcard masks, usable host ranges, and broadcast addresses in real time. Deconstruct 32-bit IPv4 boundaries with interactive visual binary partitioning.
Valid IP
/
Subnet Prefix Mask Slider:
/24 (255.255.255.0)
/8 (Class A)
/16 (Class B)
/24 (Class C)
/28
/30
/32 (Host)
Quick Presets:
Subnet Calculation Results
RFC 1918 Private
Network Address
192.168.1.0
Broadcast Address
192.168.1.255
Usable Host Range
192.168.1.1 – 192.168.1.254
Usable Hosts (2n - 2)
254
256 total
Subnet Mask (Dotted Decimal)
255.255.255.0
Wildcard (Inverted) Mask
0.0.0.255
Hex Mask & Historic Class
0xFFFFFF00
Class C
32-Bit Binary Address Boundary
Network Bits (24)
Host Bits (8)
Common Subnet Reference
| CIDR | Mask | Hosts |
|---|---|---|
| /32 | 255.255.255.255 | 1 |
| /30 | 255.255.255.252 | 2 |
| /29 | 255.255.255.248 | 6 |
| /28 | 255.255.255.240 | 14 |
| /27 | 255.255.255.224 | 30 |
| /26 | 255.255.255.192 | 62 |
| /24 | 255.255.255.0 | 254 |
| /23 | 255.255.254.0 | 510 |
| /20 | 255.255.240.0 | 4,094 |
| /16 | 255.255.0.0 | 65,534 |
| /8 | 255.0.0.0 | 16,777,214 |