Search for ZIP codes online by entering as much information as you can about an address or area into a ZIP code database. The database will return results for the ZIP code of that address or area. Many such databases exi... More »

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The United States Postal Service assigns ZIP codes according to the geographical location and delivery route of the postal address. This allows for mail to be routed to the service centers that handle the mail for those ... More »

USPS zip code maps can be found by visiting the USPS website and inputting the street address, city and state. There is also an option to look up the zip code map by company or to view all of the cities within a particul... More »

Look up address and ZIP codes on USPS.com by accessing the site's ZIP code search tool and entering the available information into the designated fields. The tool allows you to find the ZIP code associated with an addres... More »

Find ZIP codes by entering the street address on the United States Postal Service website or at several ZIP code map sites, including UnitedStatesZIPCodes.org, MapsOfTheWorld.com and ZIP-Codes.com. Conversely, find ZIP c... More »

www.reference.com Government & Politics Public Records

The United States Postal Service assigns ZIP codes according to the geographical location and delivery route of the postal address. This allows for mail to be routed to the service centers that handle the mail for those ... More »

The U.S. Postal Service provides lists of ZIP codes for Portland and areas throughout the country; they are available, as a list or by address, via the ZIP code lookup tool on the USPS website. There are 56 ZIP codes use... More »

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