Subnet capacity
Standard AWS / Azure subnets and GCP primary IPv4 ranges.
10.20.0.0/24
Capacity fits- Total addresses
- 256
- Provider reserved
- 5
- Usable addresses
- 251
- IPs including growth
- 240
- Remaining after growth
- 11
- Suggested subnet size
- /24
Assignable range: 10.20.0.4 – 10.20.0.254
Planning scope
This is capacity math, not deployment validation. Count all IP-consuming interfaces, private endpoints and services, not just VMs. Service-specific minimum sizes, overlaps, routes and BYOIP exceptions are not checked. GCP secondary ranges use different reservations. A suggested prefix does not allocate a free CIDR.
Read AWS subnet documentation