In the case of cities and large towns, however, the last two digits of the postcode indicate the mode of delivery, with the digits 01 indicating a street address and 00 a PO Box or Private Bag address.
In the case of cities and large towns, however, the last two digits of the postcode indicate the mode of delivery. For example, in Port Elizabeth the code 6001 indicates a street address and 6000 indicates a PO Box or Private Bag address.