MAC Address OUI Vendor Manufacturers as PowerShell Objects. Associated Blog Post can be found here https://blog.darrenjrobinson.com/an-azure-powershell-trigger-function-for-mac-address-vendor-manufacturer-lookup/

MAC Address OUI.ps1

# Get MAC Vendor List http://standards.ieee.org/develop/regauth/oui/oui.txt 
$uri = "http://standards.ieee.org/develop/regauth/oui/oui.txt"
$output = "C:\temp\MAC Address\vendors.txt"
[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12
Invoke-RestMethod -Uri $uri -Method GET -OutFile $output

$vendors = @()

if (test-path -Path $output) {
    $vendorlist = Get-Content -Path $output 
    if ($vendorlist.Length -gt 15300) {
        foreach ($vendor in $vendorlist) {
            if (($vendor.Contains("(hex)")) -or ($vendor.Contains("(base 16)"))) {
                $arrVDetails = $vendor.Split("`t")
                if (!$vendorName) {
                    $vendorName = $arrVDetails[2]
                }
                if ($vendor.Contains("(hex)")) { $hex = $arrVDetails[0].Split(" ")}
            if ($vendor.Contains("(base 16)")) { $base16 = $arrVDetails[0].Split(" ")}
                if ($hex -and $base16 -and $vendorName) {
                    write-host -ForegroundColor blue "$($base16[0]) $($hex[0]) $($vendorName)"                  
                    $vendorDetails = [PSCustomObject]@{    
                        vendor = $vendorName
                        base16 = "$($base16[0])"
                        hex    = "$($hex[0])"                    
                    }
                    $vendors += $vendorDetails
                    $arrVDetails = $null 
                    $hex = $null
                    $base16 = $null
                    $vendorName = $null 
                }
            }
        }
    }
}

$vendors | Export-Clixml -Path "C:\temp\MAC Address\Vendors.xml"

<#
Sample Objects 
vendor      base16 hex
------      ------ ---
Apple, Inc. F0766F 40-CB-C0
Apple, Inc. 40CBC0 40-98-AD
Apple, Inc. 4098AD 6C-4D-73
Apple, Inc. 6C4D73 C4-84-66
Apple, Inc. C48466 B8-63-4D
Apple, Inc. B8634D 50-32-37
Apple, Inc. 503237 D4-61-9D
Apple, Inc. D4619D B0-48-1A
Apple, Inc. B0481A 98-9E-63
#>