Common Subnet Sizes
CIDR
Mask
Hosts
Use Case
/30
255.255.255.252
2
Point-to-point links
/29
255.255.255.248
6
Small office
/28
255.255.255.240
14
Small network
/27
255.255.255.224
30
Small LAN
/26
255.255.255.192
62
Medium LAN
/25
255.255.255.128
126
Large LAN
/24
255.255.255.0
254
Standard network
/16
255.255.0.0
65,534
Large organization