EarthWorks Geospatial Catalog

U.S. Telephone Area Code Boundaries : ESRI Data Maps 2010

Description
U.S. Telephone Area Code Boundaries represents the telephone area codes for the United States. They are also known as Numbering Plan Areas (NPA). The Numbering Plan Areas reflect current and accurate boundary changes both where new NPAs "split" from existing NPAs and where new NPAs "overlay" existing NPAs.
Publisher
ESRI
Year
2010
Held by
Harvard
More details at