Regex for dutch phone numbers that works inside a sentence or if concatenated

Question

I'm looking for a regex that will find a dutch phone number inside a piece of text. For example:

• Mijn telefoonnnummer is 0612131415
• Mijn telefoonnnummer is 06-12345678
• Mijn telefoonnummer0612131415email

Is shouldn't detect

• 000006121314150000
• -0612131415-
• 00-0612131415-00

This regex (https://regexr.com/3aevr) seems fine for detecting seperate values:

^((\+|00(\s|\s?\-\s?)?)31(\s|\s?\-\s?)?(\(0\)[\-\s]?)?|0)[1-9]((\s|\s?\-\s?)?[0-9])((\s|\s?-\s?)?[0-9])((\s|\s?-\s?)?[0-9])\s?[0-9]\s?[0-9]\s?[0-9]\s?[0-9]\s?[0-9]$

Unfortunately it does not work for my purposes. Any help is appreciated.

Answer 1

You can use

(?<![^a-zA-Z\s])((\+|00(\s|\s?-\s?)?)31(\s|\s?-\s?)?(\(0\)[-\s]?)?|0)[1-9]((\s|\s?-\s?)?[0-9])((\s|\s?-\s?)?[0-9])((\s|\s?-\s?)?[0-9])\s?[0-9]\s?[0-9]\s?[0-9]\s?[0-9]\s?[0-9](?![^a-zA-Z\s])

See the regex demo.

The (?<![^a-zA-Z\s]) negative lookbehind makes sure there is an ASCII letter or a whitespace char, or start of string immediately to the left of the current location.

The (?![^a-zA-Z\s]) negative lookahead makes sure there is an ASCII letter or a whitespace char, or end of string immediately to the right of the current location.

Answer 2

You can try with this regex:

(?<![\d\-])\d{2}-?\d{8}(?!\d)

Explanation:

• (?<![\d\-]): Negative lookbehind that doesn't matches ...
  • [\d\-]: a digit or a dash (at the beginning of your number)
• \d{2}: two digits
• -?: optional dash
• \d{8}: eight digits
• (?!\d): Negative lookahead that doesn't matches ...
  • \d: a digit (at the end of your number)

Try it here.

Note: Lookbehind and lookahead in this regex ensure there are no more than 10 digits in your string (the ones inside the matching pattern).