A /22 combines four /24s: 1,024 addresses, 1,022 usable, mask 255.255.252.0. Guest Wi-Fi and large office networks often use one so there’s room for every phone and laptop. Because the boundary falls in the third octet, the network address always has a third octet divisible by 4, such as 10.0.4.0/22.
Facts
- Prefix
- /22
- Subnet mask
- 255.255.252.0
- Wildcard mask
- 0.0.3.255
- Binary mask
- 11111111.11111111.11111100.00000000
- Total addresses
- 1,024
- Usable hosts
- 1,022
- Example range
- 192.168.0.0/22: 192.168.0.0 – 192.168.3.255
- Typical use
- Large office or campus segments.
Try it
Try: , ,
- CIDR block
- 192.168.0.0/22
- IP range
- 192.168.0.0 – 192.168.3.255
- Addresses
- 1,024
- Usable hosts
- 1,022
- Subnet mask
- 255.255.252.0
- Wildcard mask
- 0.0.3.255
Frequently asked questions
How many hosts are in a /22?
A /22 has 1,024 addresses. Subtracting the network and broadcast addresses leaves 1,022 usable hosts.
What is the subnet mask for /22?
/22 is 255.255.252.0 (wildcard mask 0.0.3.255). In binary that’s 22 ones followed by 10 zeros.