The first postal codes in Finland were introduced in Helsinki in mid-1960s. The city center post office became "Helsinki 10", Kruununhaka was "Helsinki 13", and Käpylä district, for instance, "Helsinki 60".
In the 1970s, a five-digit postal code was added to all addresses in the country: "00100 Helsinki 10", "00130 Helsinki 13", "96100 Rovaniemi 10", etc.
The first postal codes in Finland were introduced in Helsinki in mid-1960s. The city center post office became "Helsinki 10", Kruununhaka was "Helsinki 13", and Käpylä district, for instance, "Helsinki 60".
In the 1970s, a five-digit postal code was added to all addresses in the country: "00100 Helsinki 10", "00130 Helsinki 13", "96100 Rovaniemi 10", etc.