mobile numbers

http://en.wikipedia.org/wiki/North_American_Numbering_Plan

This means that most North American mobile phones are assigned the same locality-specific codes as landlines, and calls to them are billed at the same rate. 

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http://www.phonecallmall.com/cellphone/dialingcodes.html

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http://www.telespiegel.de/vorwahl/handyvorwahl-ausland.php