area code (US) dialling code

identifying an area or region, used before the local telephone number 电话分区代号（用於当地电话号码之前）. =>App 4 见附录4.

archetypally, archetype, archipelago, architect, architectural, architecture, archive, archives, archivist, archway, Arctic, Arctic Circle, ardent, ardently, ardor, ardour (US ardor), arduous, arduously, are, area, areca, areca nut (also betel-nut), aren't, arena, arete, argon, argot, arguable, arguably, argue, argument, argumentation, argumentative, argumentatively, argy-bargy, aria, arid, aridity, aridly, aridness,