By default, Magento allows you to configure up to 4 address fields to be used in the checkout. The module allows you to specify which fields are mapped to street, house number, and house number extension.
If the house number and extension fields are disabled, the module will try to extract them from the street field. For the best results, use 1 or 3 street fields. If you use 2 street fields, you can't choose delivery time frames in the checkout.