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As a result, some addresses end up with a ZCTA code that is different from their ZIP code. ZCTAs are not developed for ZIP codes that comprise only a small number of addresses. [3] Several ZCTAs represent ZIPs that no longer exist due to realignment by the USPS. There are approximately 42,000 ZIP Codes and 32,000 ZCTAs.
ZCTAs or ZIP Code Tabulation Areas are the census equivalent of ZIP codes used for statistical purposes. The reason why regular ZIP codes are not used is because they are defined by routes rather than geographic boundaries. Thus, they have the tendency to overlap and otherwise create difficulties.
ZIP Code Tabulation Areas (ZCTA) are quasi-statistical areas which attempt to approximate, but do not exactly match, the delivery areas of USPS ZIP codes. [1] ZIP codes are not truly areas, but rather a group of deliverable addresses. [2] Some or all of an existing ZIP code's addresses may be reassigned to a new ZIP if there is sufficient ...
In order to receive the appropriate barcode discount, the delivery point digits and the +4 extension must be verified using an up-to-date, CASS or Delivery Point Validation (DPV) certified program. Since each city block or section of a rural route has a different +4 extension, and address numbers generally increase by 100 per block, the ...
A check of address using LACS is typically not performed by the USPS, but by third parties who license the LACS data from the USPS. A licensee will create or purchase software to perform the LACS check and receive monthly or bi-monthly updates of LACS data from the USPS.
A map of the 5 digit ZIP Code Tabulation Areas in Virginia. David Benbennick made this map. The map uses the Census 2000 5-Digit ZIP Code Tabulation Areas, specifically zt51_d00_shp.zip. The map uses azimuthal equidistant projection, centered on (-78.68, 37.53). The map is in hectometers (tenths of a kilometer).
A 5 digit (plus check digit) barcode, containing the basic ZIP Code only, referred to as the "A" code. 32 bars total. A 6 digit (plus check digit) barcode, containing the last 2 digits of the ZIP Code and the 4 digits of the ZIP+4 Code, referred to as a "B" code. 37 bars total. In the early stages of Postal automated mail processing the B code ...
If the address is valid, it is assigned a ZIP+4 code something like this: 12344-5678, where the first five digits are the ZIP code and the trailing four digits are the delivery range. An address with a ZIP+4 code (or nine-digit ZIP code) is considered to be valid. In most cases, this means that the address is deliverable.