There is presently no postal code system in Namibia, although one is under consideration, which would use five-digit numeric codes.
Virginia Freeman Home Loans First National Bank Private Bag 13678 WINDHOEK 11002Before independence in 1990, when the country was under South African administration, it formed part of that country's post code system, but following independence, use of post codes was discontinued.
Former South African post codes
South West Africa, including the enclave of Walvis Bay, was allocated the number range 9000–9299.
PO Box 287 WINDHOEK 9100PO Box 44 SWAKOPMUND 9180PO Box 779 WALVIS BAY 9190However, the code 9000 was commonly used for all addresses for mail from or via South Africa.
Private Bag 13267 WINDHOEK 9000Private Bag 5017 SWAKOPMUND 9000PO Box 953 WALVIS BAY 9000Walvis Bay remained under South African administration until 1994.
References
Postal codes in Namibia Wikipedia(Text) CC BY-SA