Alias and Base Street Names - Code-1_Plus - 5.0

It is possible for a single street to have more than one name. In such cases, the USPS differentiates between a base street name and one or more alias street names. Typically, either the alias or the base refers to only a portion of the street (for example, a particular house range or ranges). A base name is the preferred name for the entire street. Every street in the USPS database has one and only one base name. However, a base street can have multiple alias names. The USPS has identified three types of alias street names:

• USPS preferred street name

• Official street name change (as a result of a Chamber of Commerce Action)

• Other

If the alias street name is preferred, CODE-1 Plus always stores the alias name instead of the base name. If the alias street name is an official street name change, CODE-1 Plus always stores the base name. However, if the alias street name is of type "other," CODE-1 Plus stores the alias or base, depending on the option you chose on the SA OUT parameter. Note that you never have the option of returning the alias street name if the input address matches the base street name. It is important to remember, however, that both the base street and the alias street are valid, deliverable addresses.

For example, in Bethesda, Maryland there is a street called Rockville Pike. Another valid name for Rockville Pike in Bethesda is Wisconsin Avenue. In this case, the USPS designated Rockville Pike as the base street name and Wisconsin as the alias street name.

The following example input addresses illustrate CODE-1 Plus returned output when processing alias and base street names (this example assumes that all alias street names are of type "other").