NPA	NXX	CLLI	City, ST	Telco
248	472	DTRTMIMD1TD	DETROIT	AMERITECH MICHIGAN
313	472	DTRTMIMD1TD	DETROIT	AMERITECH MICHIGAN
734	472	DTRTMIMD1TD	DETROIT	AMERITECH MICHIGAN
810	472	DTRTMIMD1TD	DETROIT	AMERITECH MICHIGAN