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.