IPv4 Subnet Calculator
Convert CIDR to subnet mask and see network, broadcast, host range and wildcard, with a live binary breakdown of every bit.
Network Configuration
Binary Breakdown
Usable Host Range
- Network Address
- 192.168.1.0
- Broadcast Address
- 192.168.1.255
- Subnet Mask
- 255.255.255.0
- Wildcard Mask
- 0.0.0.255
Network Properties
- Usable Hosts
- 254
- Total IPs
- 256
- IP Class
- C
- IP Type
- Private
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How to calculate Subnet Mask from CIDR?
Classless Inter-Domain Routing (CIDR) is a method for allocating IP addresses and IP routing. The CIDR notation specifies the number of bits in the network prefix (the "slash" notation, e.g., /24).
This utility calculates the Subnet Mask, Network Address, Broadcast Address, and the range of usable host IP addresses. It also provides the Wildcard Mask, which is useful for configuring ACLs (Access Control Lists) on routers like Cisco or Mikrotik.
Common Subnets
- /24 (255.255.255.0) - 254 Usable Hosts (Standard LAN)
- /30 (255.255.255.252) - 2 Usable Hosts (PtP Links)
- /32 (255.255.255.255) - 1 Usable Host (Loopback / Single IP)
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