Parse Phone Number into component parts

Question

I need a well tested Regular Expression (.net style preferred), or some other simple bit of code that will parse a USA/CA phone number into component parts, so:

• 3035551234122
• 1-303-555-1234x122
• (303)555-1234-122
• 1 (303) 555 -1234-122

etc...

all parse into:

• AreaCode: 303
• Exchange: 555
• Suffix: 1234
• Extension: 122

Answer 1

None of the answers given so far was robust enough for me, so I continued looking for something better, and I found it:

Google's library for dealing with phone numbers

I hope it is also useful for you.

Answer 2

This is the one I use:

^(?:(?:[\+]?(?<CountryCode>[\d]{1,3}(?:[ ]+|[\-.])))?[(]?(?<AreaCode>[\d]{3})[\-/)]?(?:[ ]+)?)?(?<Number>[a-zA-Z2-9][a-zA-Z0-9 \-.]{6,})(?:(?:[ ]+|[xX]|(i:ext[\.]?)){1,2}(?<Ext>[\d]{1,5}))?$

I got it from RegexLib I believe.

Answer 3

This regex works exactly as you want with your examples:

Regex regexObj = new Regex(@"\(?(?<AreaCode>[0-9]{3})\)?[-. ]?(?<Exchange>[0-9]{3})[-. ]*?(?<Suffix>[0-9]{4})[-. x]?(?<Extension>[0-9]{3})");
Match matchResult = regexObj.Match("1 (303) 555 -1234-122");

// Now you have the results in groups 
matchResult.Groups["AreaCode"];
matchResult.Groups["Exchange"];
matchResult.Groups["Suffix"];
matchResult.Groups["Extension"];

Answer 4

Strip out anything that's not a digit first. Then all your examples reduce to:

/^1?(\d{3})(\d{3})(\d{4})(\d*)$/

To support all country codes is a little more complicated, but the same general rule applies.

Answer 5

Here is a well-written library used with GeoIP for instance:

http://highway.to/geoip/numberparser.inc

Answer 6

here's a method easier on the eyes provided by the Z Directory (vettrasoft.com), geared towards American phone numbers:

string_o s2, s1 = "888/872.7676";
z_fix_phone_number (s1, s2);
cout << s2.print();      // prints "+1 (888) 872-7676"
phone_number_o pho = s2;
pho.store_save();

the last line stores the number to database table "phone_number". column values: country_code = "1", area_code = "888", exchange = "872", etc.