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Locatable Address Conversion System (LACS) is a service offered by the United States Postal Service to update mailing addresses when a street is renamed or the address is updated for 911. In the case of 911, the address is changed from a rural route format to an urban/city route format.
Before an address can be certified as deliverable (CASS-certified), it must first be standardized. Standardization converts an address into a standard format by correcting the address, if possible, and adding missing information, such as a ZIP code, to produce a complete address containing a street address, city, state, and ZIP code.
National Change of Address (NCOALink) is "a secure dataset of approximately 160 million permanent change-of-address (COA) records consisting of the names and addresses of individuals, families and businesses who have filed a change-of-address with the USPS". [1]
The delivery point is usually redundant for post office boxes, since they are typically assigned their own ZIP+4 code, but must nonetheless be assigned a complete DPBC for full postal discounts. The full rules for identifying the delivery point for a given address are specified in the USPS CASS Technical Guide. [2]
The Post office/Mail centre field is the name of the town/city which post office/mail centre jurisdiction covers the mailing address, and in several cases, may not be the actual town/city which the address is geographically located. It is recommended to have the Post office/Mail centre written in block letters, e.g. KUALA LUMPUR.
An example of a PO box-only ZIP Code is 22313, used for boxes at the main post office in Alexandria, Virginia, including those used by the United States Patent and Trademark Office. In the area surrounding that post office, home and business mail delivery addresses use ZIP Code 22314, a standard ZIP Code.
Address geocoding, or simply geocoding, is the process of taking a text-based description of a location, such as an address or the name of a place, and returning geographic coordinates, frequently latitude/longitude pair, to identify a location on the Earth's surface. [1]
Several United States post offices are individually notable and have operated under the authority of the United States Post Office Department (1792–1971) or the United States Postal Service (since 1971).