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The Postcode Address File (PAF) is a database that contains all known "delivery points" and postcodes in the United Kingdom. The PAF is a collection of over 29 million Royal Mail postal addresses and 1.8 million postcodes . [ 1 ]
The BF postcode area was introduced in 2012 to provide optional postcodes for British Forces Post Office addresses, for consistency with the layout of other UK addresses. It uses the national non-geographic post town "BFPO" and, as of 2012, the postcode district "BF1". Each BFPO number is assigned an inward code, which are grouped as: 0 ...
Two letter postal codes for each of the nation's 18 administrative regions (e.g. AW for Awdal, BN for Banaadir, BR for Bari and SL for Sool). [27] South Africa: 8 October 1973 ZA: NNNN Postal codes are allocated to individual Post Office branches, some have two codes to differentiate between P.O. Boxes and street delivery addresses.
A postcode can be validated against a table of all 1.7 million postcodes in Code-Point Open. The full delivery address including postcode can be validated against the Royal Mail Postcode Address File (PAF), which lists 29 million valid delivery addresses, [27] constituting most (but not all) addresses in the UK. [28]
The postcode area is the largest geographical unit used and forms the initial characters of the alphanumeric UK postcode. [1] There are currently 121 geographic postcode areas in use in the UK and a further 3 often combined with these covering the Crown Dependencies of Guernsey, Jersey and Isle of Man. [ 2 ]
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.
Postcode areas shown with former postal counties. This is a list of postcode districts in the United Kingdom and Crown Dependencies. A group of postcode districts with the same alphabetical prefix is called a postcode area. All, or part, of one or more postcode districts are grouped into post towns. [1]
Established in 1975 during the Royal Mail postal strikes of the 1970s, DX Group has been in private ownership since 2006 and combines DX Network Services Ltd, DX Secure (previously Secure Mail Services (SMS)) and, as of 15 March 2012, DX Freight, previously known as Nightfreight GB until its acquisition in 2012.