NPA	NXX	CLLI	City, ST	Telco
773	224	CHCGILSTDS0	CHICGOZN07	AMERITECH ILLINOIS
773	361	CHCGILSTDS0	CHICGOZN07	AMERITECH ILLINOIS
773	371	CHCGILSTDS0	CHICGOZN07	AMERITECH ILLINOIS
773	483	CHCGILSTDS0	CHICGOZN07	AMERITECH ILLINOIS
773	487	CHCGILSTDS0	CHICGOZN07	AMERITECH ILLINOIS
773	602	CHCGILSTDS0	CHICGOZN07	AMERITECH ILLINOIS
773	873	CHCGILSTDS0	CHICGOZN07	AMERITECH ILLINOIS
773	892	CHCGILSTDS0	CHICGOZN07	AMERITECH ILLINOIS