Hi RC,

Yes, there is a way to add area codes to phone numbers that are missing them in Excel. Here's how you can do it:

1. Insert a new column next to the column containing the phone numbers.
2. In the first cell of the new column, enter the area code you want to add.
3. Select the entire column containing the phone numbers (including the header).
4. Click on the "Home" tab in the Excel ribbon.
5. Click on "Find & Select" in the "Editing" section of the ribbon.
6. Click on "Replace" in the drop-down menu.
7. In the "Find what" field, enter a single space (press the spacebar once).
8. In the "Replace with" field, enter a space followed by the area code you entered in step 2 (e.g. " 555").
9. Click on "Replace All".

This will add the area code to all phone numbers that were missing it. If there were any phone numbers that already had the area code, they will not be affected.