This power shell script goes through the csv file and exports the column into a filename+out.csv
Get-ChildItem -Path . -Recurse -Filter '*.csv' |
ForEach{
$out = $PSItem.Name+"_out.csv"
$PSItem |
Select-Object -Property FullName,
@{Name = 'FirstLineOfFile';Expression = {Get-Content -Path $PSItem.FullName -First 1}}
Import-Csv $PSItem.FullName | select Phone,HomePhone,Home_Phone,Phone_1,'Phone Home',PhoneNumber,HomePhoneNumber,'Phone Number'| Export-Csv -Path $out -NoTypeInformation
}