German Phone Number Regex

Question

I have a regex $?\+\(?49?$?[ ()]?([- ()]?\d[- ()]?){11}

This correctly matches German phone code like

+491739341284
+49 1739341284
(+49) 1739341284
+49 17 39 34 12 84
+49 (1739) 34 12 84
+(49) (1739) 34 12 84
+49 (1739) 34-12-84

but fails to match 0049 (1739) 34-12-84. I need to adjust the regular expression so that it can match numbers with 0049 as well. can anyone help me with the regex?

What have you tried so far? How much of the REGEx you have do you understand? What could be the problem? — helle, Jul 20 '22 at 20:07
so I tried this basic ```((\+49)?(0049)?)([0-9]{11})```, but it wont removed the spaces, so stack overflow it and got ```$?\+\(?49?$?[ ()]?([- ()]?\d[- ()]?){11}``` this one, now I'm finding it hard to add (0049) thing in this one — Ayub Jamal, Jul 20 '22 at 20:13
tried this ```\(?\+\(?49?(0049)?[ ()]?([- ()]?\d[- ()]?){11}``` but didn't worked — Ayub Jamal, Jul 20 '22 at 20:14
Note that your pattern does not match `+(49) (1739) 34 12 84` Is that the expected? See https://regex101.com/r/ij49Hv/1 — The fourth bird, Jul 20 '22 at 20:34

score 0 · Answer 1 · answered Jul 20 '22 at 22:26

Try this one:

\(?\+|0{0,2}\(?49\)?[ ()]*[ \d]+[ ()]*[ -]*\d{2}[ -]*\d{2}[ -]*\d{2}

https://regex101.com/r/CHjNBV/1

However, it's better to make it accept only +49 or 0049, and throw the error message in case the number fails validation. Because if someday you will require to extend the format - it will require making the regex much more complicated.

score 0 · Answer 2 · answered Jul 22 '22 at 15:37

If you want to match the variations in the question, you might use a pattern like:

^(?:\+?(?:00)?(?:49|\(49\))|\(\+49\))(?: *\(\d{4}\)|(?: ?\d){4})? *\d\d(?:[ -]?\d\d){2}$

Explanation

^ Start of string
(?: Non capture group
- \+? Match an optional +
- (?:00)? Optionally match 2 zeroes
- (?:49|$49$) Match 49 or (49)
- | Or
- $\+49$ Match (+49)
) Close non capture gruop
(?: Non capture group
- * Match optional spaces
- $\d{4}$ Match ( 4 digits and )
- | Or
- (?: ?\d){4} Repeat 4 times matching an optional space and a digit
)? Close non capture group and make it optional
* Match optional spaces
\d\d Match 2 digits
(?:[ -]?\d\d){2} Repeat 2 times matching either a space or - followed by 2 digits
$ End of string

Regex demo

Or a bit broader variation matching the 49 prefix variants, followed by matching 10 digits allowing optional repetitions of what is in the character class [ ()-]* in between the digits.

^(?:\+?(?:00)?(?:49|\(49\))|\(\+49\))(?:[ ()-]*\d){10}$

Regex demo

German Phone Number Regex

2 Answers2