When you design your international data format, the more space you allow, the cleaner and more consistent your international records will be. And be sure to set aside the last line of the address for the name of the country. This system is not used in the USA, so mail entered into the mail stream within the USA should have the name of the destination country on the last line. Make your layout flexible. There is no standard layout for international addresses.
Formats differ from country to country, and sometimes even within the same country.
In some countries, the postcode goes to the right of the city. In others, it is to the left. A typical address will have many short lines in some countries, while, in others, each line will be longer. And two-line addresses are acceptable in some places, so make sure your system does not discard them as undeliverable. Develop your system so that it does some of the work.