looks not like a valid German phone number.
Examples of valid German phone numbers:
- 004957193299091
- +4957193299091
- +49 57193299091
- +49 170 12345678
- +49 30 1234567
- +49 571 932 990 91
- +49-30-1234567
- +49-30-123-45-67
- 057193299091
- 030 12345678
- 0170 1234567
- 0571 932 990 91
- 0571-932-990-91
- (030) 12345 67