NPA	NXX	CLLI	City, ST	Telco
319	406	CDRRIAAB4MD	DENVER	AT&T LOCAL
319	464	CDRRIAAB4MD	WATERLOO	AT&T LOCAL
319	471	CDRRIAAB4MD	IOWA CITY	AT&T LOCAL
319	491	CDRRIAAB4MD	CEDAR RPDS	AT&T LOCAL