With your Contacts info in columns in Excel..................
Name.........Address..........email.........whatever
Save the workbook after giving your list a defined
name through Insert>Name>Define.
Outlook likes that.
With Outlook open go to File>Import Export>"Import from another program or file"
Follow your nose from there to choose your Excel workbook.
Note: the mapping can be done while importing.
To see the full list of fields Outlook has, export some of your your contacts to
a new Excel workbook to get an idea of what's available for mapping.
Gord Dibben MS Excel MVP