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My ZIP+4ZIP codes are in separate columns. How do I merge them into one column?
Last updated June 16, 2026.
Guide
Use the Flash Fill feature in your spreadsheet program to merge the ZIP codes together.

When you use our Postcard mailing services, you can upload your addresses in a spreadsheet. The upload works best when all the numbers of zip codes are contained within one cell. If the parts of the zip codes are in seperate cells, follow these step to merge the cells into one.  

1

Select a cell

Choose the cell where you want to put the first set of combined numbers.

2

Type the combined ZIP code

For example: 90210–6808. Then, press enter.

3

Select Data

In the menu, select the Data option.

4

Select Flash Fill

You’ll find the Flash fill function in the Data Tools group.

Excel automatically combines the rest of the text for you.


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