CIDR Prefix: /12
Usable Host Range for /12 Subnet
Class B private network allocation (172.16.0.0/12) and Azure Enterprise VNet space. Pre-calculated routing boundaries, binary mapping mask, cloud provider allocation metrics, and copy-ready Terraform snippets.
100% Free & Secure Client-Side Sandbox
Interactive /12 Subnet Workspace
Pre-loaded Seed: 172.16.0.0/12Instantly ingest standardized industrial address space assignments from cloud reference blueprints.
Pre-Computed /12 Subnet Technical Specifications
Verified 32-bit Bitwise Calculation MatrixSubnet Mask (Dotted Decimal)255.240.0.0
Usable Host Capacity1,048,574 IPs
Cloud Reserved IPs (AWS)5 IPs
Default Range Seed172.16.0.0/12
| Binary Mask Blueprint | 11111111.11110000.00000000.00000000 |
|---|---|
| CIDR Notation | /12 |
| Netmask Address | 255.240.0.0 |
| Total Host Addresses | 1,048,576 |
| Usable Hosts (Standard IPv4) | 1,048,574 usable IPs |
| Cloud Net Capacity (AWS / GCP) | 1,048,571 usable IPs(AWS reserves 5 addresses: Network, VPC Router, DNS, Reserved, Broadcast) |
| Primary Architectural Use Case | Class B private network allocation (172.16.0.0/12) and Azure Enterprise VNet space. |
Terraform IaC Configuration Block (/12)
Copy-ready infrastructure code# Azure Virtual Network using the private /12 range.
resource "azurerm_virtual_network" "vnet" {
name = "enterprise-vnet"
address_space = ["172.16.0.0/12"]
location = "East US"
resource_group_name = "rg-network"
}Related CIDR Subnet Specifications
← Larger Network (Double Host Capacity)/11 Subnet (2,097,150 Usable Hosts)
Large multi-region cloud transit supernet for global hybrid infrastructure.
Smaller Network (Half Host Capacity) →/13 Subnet (524,286 Usable Hosts)
Large enterprise WAN aggregation block covering multiple datacenters.