Postal codes in Cygnia (Joan of What?)

Postal codes in , colloquially known as postcodes, are six or seven-character strings that form part of a postal address. Cygnian postcodes are alphanumeric, and are in the format A(A)1(1) 111, where A is a letter and 1 is a digit, with a space separating the third/fourth and the fourth/fifth characters. There are over 800,000 postcodes currently in service across Cygnia using postal districts ranging from SW1 in to P35 in.

When writing out the postal address for a location within Cygnia, the postcode follows the.

Postal districts
A postal district is a geographic area in which all postcodes start with the same three or four characters. The first letter(s) of a postal district code denotes a particular "postal region". These regions cover several states and/or territories, with the exception of, , and , which, due to their large populations, are divided into several postal regions. After the letters, the final number denotes the district itself, which is a division of a postal region.