Network Addressing Tool

IPv4 Subnet Calculator

Convert CIDR to subnet mask and see network, broadcast, host range and wildcard, with a live binary breakdown of every bit.

CIDR /0 – /32 • Binary visual • Instant, no sign-up

Network Configuration

IP Address

CIDR Mask

Binary Breakdown

24 network 8 host

1 1 0 0 0 0 0 0

192

1 0 1 0 1 0 0 0

168

0 0 0 0 0 0 0 1

Usable Host Range

192.168.1.1 – 192.168.1.254

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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