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 FileMaker Pro Custom Functions

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  Average rating: 4.2  (40 votes)
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Timothy Trimble, Data Design Labs

Phone Number Formatting

Sample Input:
Sample Output:
1+(425)555-1212 x55

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.


Determines the correct structure of a US phone number based on length and if the number starts with a 1.

Will support numbers with structure of :
1 888 555 1212 x943
555 1212
888 555 1212
1 888 555 1212

Anything over 11 chars, with a 1 prefix, will suffix the rest as an extension.
Or, anything over 10 chars, wo a 1 prefix, will suffix the rest as an extension.
Anything less than 7 characters will not get any formatting.

Formatting is structured as:
n+(nnn)nnn-nnnn xnnn

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


You can replace the substitute function by a Filter function.

Let (pnum = Filter( text; "1234567890") ;

to remove all unwanted character from the input string.

Jean-Pierre Boudreau, Montreal QC Canada
November 10, 2009 12:13pm

C'est genial!
Merci, mon pote.

Greg Pering, Greer, SC
January 03, 2010 4:56pm

Hi I am utilizing the Starting Point Freeware. which has this script

However the phone fields are formatted to suit USA as above.

Is it possiable to get scripting to suit New Zealand, number formatting as follows:

64 06 3425589

64= NZ 06=town /city
3425589= local number.

Your help would be really appreciated

Regards Mark Stratford

Mark Stratford, New Zealand
October 15, 2012 3:20pm

hi there,
i am having exactly the same problem!! how can i get a formatting suitable for new zealand or, even better, an international one?

mark, if you found a solution, could you please email me?, thanks a lot!
thanks, maria

maria fritzen, auckland
February 03, 2016 2:12pm

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