Common Subnets
Frequently used CIDR prefixes with masks, host counts, and typical usage.
CIDR Subnet Mask Hosts Usage
/8 255.0.0.0 16,777,214 Large ISPs
/16 255.255.0.0 65,534 Universities
/24 255.255.255.0 254 Small businesses
/25 255.255.255.128 126 Departments
/26 255.255.255.192 62 Teams
/27 255.255.255.224 30 Small offices
/28 255.255.255.240 14 Workgroups
/29 255.255.255.248 6 Small groups
/30 255.255.255.252 2 Point-to-point