Infoblox Universal DDI: Extract Empty Subnets

This PowerShell script finds all empty subnets (no assigned hosts, only network/broadcast addresses used) across all IPAM spaces in your Infoblox Universal DDI (EU tenant) and exports them to a CSV file.

Quick Start

1. Install PowerShell 7+ and the ibPS module:

   Install-Module -Name ibPS -Scope CurrentUser

2. Save your API key in a file named .b1apikey in the script directory (no quotes, no extra lines).
3. Run the script:

   pwsh ./extract-empty-subnets.ps1

Output

• Results are saved as empty_subnets-YYYYMMDD-HHmmss.csv.
• Columns: Name, Address, CIDR, Location, Cloud Provider, Subnet Creation Date, First Seen, Last Seen (sortable in Excel).

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Note: Requires access to the Infoblox Universal DDI EU tenant and a valid API key.