NPA	NXX	CLLI	City, ST	Telco
313	224	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	235	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	237	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	471	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	596	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	628	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	961	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	964	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	965	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN
313	967	DTRTMIBHDS1	DETROITZN1	AMERITECH MICHIGAN