IP / CIDR Calculator

Networking & Geo

Network, broadcast, mask and host range for IPv4.

Address

IPv4 only. Accepts a.b.c.d/n or a.b.c.d with a dotted mask.

Address / prefix

Class CPrivate (RFC 1918)

Network address

192.168.1.0/24

Broadcast address

192.168.1.255

Subnet mask

255.255.255.0

0xFFFFFF00 · /24

Wildcard mask

0.0.0.255

First usable host

192.168.1.1

Last usable host

192.168.1.254

Usable hosts

254

Total addresses

256

Address11000000.10101000.00000001.00001010

Mask11111111.11111111.11111111.00000000

Highlighted bits are the network portion.

IPv4 address

One CIDR per box (a bare IP counts as /32). Finds overlapping, nested and duplicate ranges.

Enter adds a field below; pasting a list fills separate fields.

Enter two or more ranges to check them for overlaps.