The AB postcode area, also known as the Aberdeen postcode area, is a group of postcode districts around Aberdeen, Aberlour, Aboyne, Alford, Ballater, Ballindalloch, Banchory, Banff, Buckie, Ellon, Fraserburgh, Huntly, Insch, Inverurie, Keith, Laurencekirk, Macduff, Milltimber, Peterculter, Peterhead, Portlethen, Stonehaven, Strathdon, Turriff and Westhill in Scotland.
AB postcode area Wikipedia
The approximate coverage of the postcode districts:
Originally, only postcode district numbers AB1 to AB5 were used, but in August 1990 the area was recoded to allocate a separate district number to each Post Town. At the same time, the postcode districts IV33, IV34 and IV35 were recoded as part of AB38.