КодСтранаРегионГородОператорДобавлено
+12-40СШАMD W Maryland: Silver Spring, Frederick, Gaithersbur2013-08-22
+12-40СШАGaithersburg, MD2013-10-18
+124-02-06СШАPrince George'sGlenn Dale, MDXo Maryland, Landline2013-10-18