CIDR prefix
/22
255.255.252.0
1,022 usable hosts · 1,024 addresses
The mask for /22 is 255.255.252.0 — 1,024 addresses, 1,022 usable hosts. Campus and larger office networks; /22–/23 are common for offices with a few hundred devices.
Mask
255.255.252.0
Wildcard
0.0.3.255
Addresses
1,024
Hosts
1,022
Worked example: 192.168.0.0/22
Network address192.168.0.0/22
Broadcast address192.168.3.255
First host192.168.0.1
Last host192.168.3.254
FAQ — /22
What is the subnet mask for /22?
The subnet mask for /22 is 255.255.252.0 (wildcard: 0.0.3.255). The first 22 bits are the network part, the remaining 10 are the host part.
How many hosts fit in a /22?
A /22 block holds 1,024 addresses, of which 1,022 are usable hosts (the network and broadcast addresses are excluded).
How many /22 subnets fit in a /16?
A /16 network divides into 64 /22 subnets.
What is a /22 used for?
Campus and larger office networks; /22–/23 are common for offices with a few hundred devices.