NPA	NXX	CLLI	City, ST	Telco
312	326	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS
312	328	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS
312	528	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS
312	567	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS
312	570	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS
312	674	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS
312	791	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS
312	808	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS
312	945	CHCGILCADS0	CHICGOZN01	AMERITECH ILLINOIS