КодСтранаРегионГородОператорДобавлено
+12-40СШАMD W Maryland: Silver Spring, Frederick, Gaithersbur2013-08-22
+12-40СШАGaithersburg, MD2013-10-18
+124-04-33СШАMontgomerySilver Spring, MDCavalier Telephone Mid-atlantic, Landline2013-10-18