United States 5-Digit ZIP Code Database - Premium Edition Schema Copyright (C) 2005 www.datanetworksource.com All rights reserved. United States 5-digit ZIP Code Premium Edition data master. Default (preferred) city name recognized by the USPS Default (preferred) organization name recognized by the USPS Alternate city name accepted by the USPS Not-recommended, used or accepted, by the USPS Standard delivery PO Box Only Organization Military Newfoundland UTC -3:30 hours Atlantic UTC -4 hours Eastern UTC -5 hours Central UTC -6 hours Mountain UTC -7 hours Pacific UTC -8 hours Alaskan UTC -9 hours Hawaiian-Aleutian UTC -10 hours Samoa UTC -11 (American Samoa) Chamorro UTC +10 (Guam and Northern Mariana Islands) United States county cross-reference. All counties located within the 25 largest MSA's All counties not included in (A) with a population over 150,000 or Located within an MSA having a population over 150,000. All counties not included in (A) or (B) with a population over 35,000 or located within an MSA having a population over 35,000. All other counties not included in (A), (B), or (C). Census Area Borough County District Municipio Parish