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POSTNET (Postal Numeric Encoding Technique) is a barcode symbology used by the United States Postal Service to assist in directing mail. The ZIP Code or ZIP+4 code is encoded in half- and full-height bars. [1] Most often, the delivery point is added, usually being the last two digits of the address or PO box number.
Also like POSTNET, PLANET always starts and ends with a full bar (often called a guard rail), and each individual digit is represented by a set of five bars using a two-out-of-five code. [1] However, in POSTNET, the two bars are full bars; in PLANET, the two-of-five are the short bars.
Postal codes in Nigeria are numeric, consisting of six digits. NIPOST, the Nigerian Postal Service, divides the country into nine regions, which make up the first digit of the code. The second and third digits, combined with the first, are the dispatch district for outgoing sorting. The last three digits represent the delivery location.
The delivery point digits are almost never printed on mail in human-readable form; instead they are encoded in the POSTNET delivery point barcode (DPBC) or as part of the newer Intelligent Mail Barcode (IMb). The DPBC makes automated mail sorting possible, including ordering the mail according to how the carrier delivers it (walk sequence).
The final digit of a Universal Product Code, International Article Number, Global Location Number or Global Trade Item Number is a check digit computed as follows: [3] [4]. Add the digits in the odd-numbered positions from the left (first, third, fifth, etc.—not including the check digit) together and multiply by three.
Aza is a Nigerian slang term that refers to bank account digits, specifically the account number. [1] When someone in Nigeria uses the term "Aza," they are requesting the account number from another person, usually with the intention of sending money to that account.
The full 11-digit form includes the standard 5-digit ZIP code, the ZIP + 4 code, and a 2-digit code indicating the exact delivery point. This is the same information that was encoded in the POSTNET barcode, which the Intelligent Mail barcode replaces.
ITF encodes pairs of digits; the first digit is encoded in the five bars (or black lines), while the second digit is encoded in the five spaces (or white lines) interleaved with them. Two out of every five bars or spaces are wide, giving the name "2 of 5", and each pair has a consistent width.