Software Venture Consulting

FileMaker Pro downloads & Resources
FileMaker Custom Functions
FileMaker Web Viewer Examples
FileMaker Pro & Lasso Consulting
FileMaker Books
FileMaker Articles
FileMaker Error Reference

Free Web Tools
Free FileMaker Tools

Personal Pages

Shopping Cart
Shopping Cart


Free Newsletter


Privacy Policy

FileMaker is a registered trademark of FileMaker, Inc. in the U.S. and other countries.


 FileMaker Pro Custom Functions

List  |  Show Random  |  Upload  |  Add This to Your Site

FormatTelNL ( TelNr ; Divider )

Rate this function:  

  Average rating: 4.7  (28 votes)
  Discuss this Custom Function

Henk Brendel, Data 33

Format telephone nrs from the perspective of dutch users

Sample Input:
FormatTelNr ( "+3311234567890" ; "-" )
Sample Output:

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


This function formats telephone numbers from the perspective of dutch users.
Any entered character that is no digit (0-9) will be stripped, except for the string "+", which will be replaced by "00" (the international entry in the Netherlands).
The telephone number will be returned as: 'Part1'-'Divider'-'Part2'.
Telephone numbers not starting with "0" or "+" will not be formatted.
Part1 will be one of 3: the dutch 'kengetal' (3 or 4 digits) or the international telephone number preceded with "00" or an empty string (in case no "0" or "+" is provided as the first digit)
Part2 will be whatever is left after Part1, without any spaces or dividers.
International numbers will have to be entered with "00" or "+" at the beginning, if not they will not be recognized as such.

"+3311234567890" will return "0033 11234567890" (when 'Divider' is a space) or "0033-11234567890" (when 'Divider' is "-").
"0123456789" will return "0123 456789".
"0123456789" will return "0123Data456789" (when 'Divider' is "Data").
"0203456789 (123)" will return "020 3456789123".
"12 34 567" will return "1234567".
"abc987 j875--" will return "987875".
"abcdef--" will return an empty string.
"abcd+ef--" will return "00 " (because of the +sign)

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


There are no comments yet. Be the first to post a comment about this Custom Function! Please try to keep it brief & to the point. Anyone can post:

Your Name:
characters left. If you paste in more than 1500 characters, it will be truncated. Discuss the function - advertisements and other useless posts will be deleted.
Answer 0 + 6 =
Search for Custom Functions:

Custom Functions Widget
Download the Custom Function Dashboard Widget for OS X
Keep all the latest Custom Functions right at your fingertips!

Newest Custom Functions:

1. HexUUIDToNum_cf (_uuid)
  (Sat, Jun 16, 1:55pm)
2. httpResponseCode ( responseHeaders )
  (Tue, Jun 12, 10:40pm)
3. FindDuplicateCharacters ( string )
  (Fri, Jun 08, 5:01pm)
4. FieldRepetitionLast ( field ; maxRepetition )
  (Wed, Jun 06, 6:05pm)
5. CountModifiedRecords ( NameTimestampField ; StartTimestamp ; EndTimestamp )
  (Mon, May 28, 8:23am)
6. JSONArrayLength ( JSONArrayStr )
  (Fri, May 25, 7:46am)
7. interpolation (y1; y2; y3; x1; x2; x3; x1y1; x2y1; x1y2; x2y2; rnd)
  (Sat, May 19, 3:55am)
8. @JSONFormatElements ( json )
  (Tue, May 15, 3:31am)

RSS Feed of Custom Functions