6 min read
2026-03-07
Subnetting the 10.10.0.0/16 network for an office with 200 employees:
Workstations — 10.10.1.0/24 (254 hosts)
Servers — 10.10.10.0/28 (14 hosts)
Guest Wi-Fi — 10.10.20.0/24 (254 hosts)
Management — 10.10.100.0/28 (14 hosts)
| VLAN | Subnet | Purpose |
|---|---|---|
| VLAN 10 | 192.168.10.0/24 | Accounting |
| VLAN 20 | 192.168.20.0/24 | Development |
| VLAN 30 | 192.168.30.0/24 | Guest network |
| VLAN 99 | 192.168.99.0/28 | Management |
In AWS VPC or Azure VNet, you need to plan subnets in advance for public and private resources, databases, and load balancers.
When connecting multiple offices, each branch's subnets must not overlap. The calculator helps select unique ranges.
Subnetting problems are a key part of CCNA and Network+ exams. The calculator lets you verify solutions and analyze mistakes.
Plan your subnets with the Subnet Calculator.
See also: IP Calculator, Port List