In my city (Leipzig), all apartments have these. All the last names are listed on doorbells, and you have a phone in your flat, from which you can unlock the ap

In my city (Leipzig), all apartments have these. All the last names are listed on doorbells, and you have a phone in your flat, from which you can unlock the apartment building's front door without coming down. So, in total, your name is three places in the apartment: at the entrance next to a doorbell (which effectively "calls" your flat), on your mailbox, and above the actual doorbell near your flat's front door.