Save your workbook (just in case)
select the range of phone numbers
edit|replace
what: . (period)
with: (leave blank)
replace all

Now use format|cells|number tab
to apply your phone number format.

Blu wrote:

I've been typing phone numbers with periods instead of dashes...when I go to
format phone numbers on Excel spreadsheet it comes up - the number.

Any suggestions?

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Dave Peterson