Subaddress Element

Subaddress Element - USA - A single combination of Subaddress Type and Subaddress Identifier (or, in some cases, a Subaddress Identifier alone), which, alone or in combination with other Subaddress Elements, distinguishes one subaddress within or between structures from another when several occur within the same feature.

Examples: 

Building 4

Wing 7

North Tower

Apartment 2D

PMB 596

Synonyms: Secondary Address Identifier (Source: USPS, EPA)

[Category=Postal ]

Source: USPS, 01 November 2009 11:42:45, http://www.usps.com/cpim/ftp/pubs/pub32/pub32q_z.html