The Postcode Address File (PAF) is a data file available from the Royal Mail. Royal Mail is the national postal service in the United Kingdom. ...
It is used to validate postal addresses and look up postcodes. It holds the correct and full postal details for over 27 million UK addresses and is available in a variety of formats including Digital Audio Tape and compact disk. A charge is made for lookup services or wholesale supply of PAF data. Look up Address in Wiktionary, the free dictionary Address may refer toâ A name for the location of an individual or organization. ... UK and Australian postal codes are known as postcodes. ... A 90-minute DAT cartridge, size compared to an AAA(LR03) battery. ...
ELEMENT FIELD NAME MAX LENGTHOrganisation Organisation Name 60 Department Name 60 Premise Sub Building Name 30 Building Name 50 Building Number 4 Thoroughfare Dependent Thoroughfare Name 60 Dependent Thoroughfare Descriptor 20 Thoroughfare Name 60 Thoroughfare Descriptor 20 Locality Double Dependent Locality 35 Dependent Locality 35 Post Town 30 Postcode Postcode 7 PO Box PO Box 6
Application
The data is used by a wide range of organisations for a variety of activities other than directing mail, such as marketing, government statistics, calculating insurance premiums and credit referencing.
Alias data
The Alias File is a supplimentary file containing "postally-not-required" data, details that have changed over time, or have been slightly amended by the public, and then used. This file is used to identify these elements and cross-reference with the correct postal address.
In the London area postcodes are slightly different, being based on the old system of 163 London postal districts and predating by many years the introduction of postcodes in the 1960s:
Postcodes were devised solely for the purposes of sorting and directing mail and rarely coincide with political boundaries.
By including the map references of postcodes in the address database, the postcode can be used automatically to pinpoint a postcode area on a map.