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A UK Post Code is made up of a number of different parts like these; BS12 6LS or N1 1DF. All together these are known as Post Code Units. Only really large buildings or large mail users have an individual code unit all to themselves. Usually code units are shared between a number of different premises.
It is worth to note at this point that in a built up area an individual Post Code will represent a handful of houses all within a few 100 metres of each other whereas a Post Code unit in a remote or rural area may represent a group of dwellings many miles apart.
HP1 3AF
HP1 3BA
HP1 3BB
HP1 3BD
HP1 3BG
HP1 3BH
HP1 3BJ
HP1 3BL
HP1 3BN
HP1 3BP
HP1 3BS
HP1 3BT
HP1 3BU
HP1 3BW
HP1 3BY
HP1 3BZ
HP1 3DA
HP1 3DB
HP1 3DD
HP1 3DE
HP1 3DF
HP1 3DG
HP1 3DQ
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