If your existing "numbers" are text strings, then =0&A1
If your existing numbers are actually numbers, but formatted, then you may
need something like
=0&TEXT(A1,"000000000000")
--
David Biddulph

"Jannie" wrote in message
...
I have a column of numbers 005445688996
005675556543 and so on.

About 500 in all. I want to add a zero to the beginning of all the
numbers.
So example the first one reads: 0005445688996 and so on down the entire
column.
Please help.
Jannie