IPArray.json

{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "inputArray": {
            "type": "array",
            "metadata": {
                "description": "string array of ip addresses"
            }
        }
    },
    "variables": {
        "outputArray": {
            "copy": [
                {
                    "name": "items",
                    "count": "[length(parameters('inputArray'))]",
                    "input": {
                        "startIpAddress": "[parameters('inputArray')[copyIndex('items')]]", 
                        "endIpAddress": "[parameters('inputArray')[copyIndex('items')]]",
                    }
                }
            ]
        }        
    },
    "resources": [],
    "outputs": {
        "ipRangeDefinitions": {
            "value": "[variables('outputArray').items]",
            "type": "array"
        },
        "ipCount": {
            "value": "[length(variables('outputArray'))]",
            "type": "int"
        }
    }
}