> As I understand for 'normal' phone numbers in CA + USA exists only 1 unique format > (except for tollfree numbers / mobile numbers) > Area code = 3 digits > Phone or Fax: 7 digits
> Is this correct? Yes > Are there any other possible formats for phone / fax? No > Concerning checking of the ZIP codes in the USA I noticed that > some users enter a ZIP code with leading state like > CA 12345 > some are using the new format > 12345-1234 and also CA 12345-1234 > Is the 9 digit ZIP code an official code and every city/locations does have > such a 9 digit code or are the 4 additional digits 'optional'. ZIP codes come in only 1 form: 12345 ZIP+4 is: 12345-6789 But most users won't use the ZIP+4 form, yet you should allow for it. Consider it's use optional. I know my +4 code, but I'd bet that a high 9x% of people don't know theirs. The use of "CA" in front of the ZIP is never proper. Maybe your form doesn't have a field for "State" or "Province"? > Also is there an official rule concerning the leading 2-character state? Yes - its use is wrong. Hugh
