In The Netherlands we have PostNL, the postal company. They use KixCodes, a fast way to deliver letters and packages that can be scanned during the process.

The code is a combination of: "Postal code", "House/box/call number" and "House appendage / suffix"
If there is a character between the house number and the suffix, we need to replace that with an X. Eventually, the code will be printed in the KixCode font.
kix_code("PostNL, Postbus 30250, 2500 GG 's Gravenhage") ➞ "2500GG30250"
kix_code("Liesanne B Wilkens, Kogge 11-1, 1657 KA Abbekerk") ➞ "1657KA11X1"
kix_code("Dijk, Antwoordnummer 80430, 2130 VA Hoofddorp") ➞ "2130VA80430"