IOM3 divides the UK into 7 regions for administration purposes and local society activities.

Post codes included within each region are as follows:

South East

AL BN BR CB CM CO CR CT DA E EC EW GU HA HP IG IP KT LU ME MK N NR NW OX PE PO RG RH RM SE SL SM SO SS SW TN TW UB W WC WD

South West (including S Wales)

BA BH BS CF DT EX GL LD NP PL SA SN SP TA TQ TR

Midlands

B CV DE DY HR LE LN NG NN ST SY TF WR WS WV

North East

BD DH DL DN HD HG HU HX LS NE S SR TS WF YO

North West (including N Wales)

BB BL CA CH CW FY L LA LL M OL PR SK WA WN

Scotland

AB DD DG EH FK G IV KA KW KY ML PA PH TD

Ireland

BT, Eire