Pitney Bowes MapMarker USA - Manual (Page 319)

Appendix F:
Location Codes
MapMarker USA 25
319
User Guide
ZIP +4 Code Location Codes
ZIP + 4 ® centroid Location Codes indicate the quality of two location attributes: Census ID accuracy
and positional accuracy. The Structure of ZIP+4 Location Codes table shows how the ZIP+4
centroid Location Codes are formatted.
The ZIP +4 Centroid Location Codes (Z Codes) table provides a detailed description of the ZIP+4
centroid Location Codes. These always begin with the letter Z.
Structure of ZIP+4 Location Codes
Character Position Description
1st character Always Z indicating a location derived from a ZIP
centroid.
2nd character Census ID accuracy.
3rd character Location type.
4th character How the location and Census ID was defined. Provided
for completeness, but may not be useful for most
applications.
ZIP +4 Centroid Location Codes (Z Codes)
Character position Code Description
2nd Character
B Block Group accuracy (most accurate).
T Census Tract accuracy.
C Unclassified Census accuracy. Normally accurate to at
least the County level.
3rd Character
5 Location of the Post Office that delivers mail to the
address, a 5-digit ZIP Code centroid, or a location
based upon locale (city). See the 4th character for a
precise indication of locational accuracy.
7 Location based upon a ZIP + 2 centroid. These
locations can represent a multiple block area in urban
locations, or a slightly larger area in rural settings.