Numberplans
International numbering plans, a collection of all international numbering plans in the world.
http://www.numberingplans.com
Steve Kropla
Steve Kropla
http://kropla.com/dialcode.htm
The List
The List
http://thelist.internet.com/countrycode.html
The List US Area-codes
The List US Area-codes
http://thelist.internet.com/areacode.html