A regular _expression_ is the obvious solution to me.  Assuming that there
are only 10 digits:

[a-z0-9]{3}[0-9]{7}

Would match (lowercase only, so use a re***nocase() call).

If you need more help than that, just ask.  Please be specific about CF
version, number of characters in the serial, and anything else you think
might be relevant.

--Ben Doom

[EMAIL PROTECTED] wrote:

> How would I check to see if the first three digits of a number are
> alpha-numeric and the last 7 are numbers?
>
> Thanks!
>
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