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Source Regular Expression ^(?:(?<Contry>\d{1,1})(?<5>[- ]?)?)?(?:(?<1>[(])?(?<AreaCode>[2-9]\d{2})(?(1)[)])(?(1)(?<2>[ ])|(?:(?<3>[-])|(?<4>[ ])))?)?(?<Prefix>[1-9]\d{2})(?(AreaCode)(?:(?(1)(?(2)[- ]|[-]?))|(?(3)[-])|(?(4)[- ]))|[- ]?)(?<Suffix>\d{4})(?:[ ]?[#xXeE]?(?<Ext>\d{2,4}))?$
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