The unit number will be 3 digits long, and this is important since there is your floor number followed by your 2 digit number. This is a total of 3 digits. It is important the know your apartment number if you want visitors, or if someone was to call your intercom phone for any reason. Let’s assume that John Doe has the unit number of 201, his address will look like:
John Doe
APT 201
2950 Orbin St
Pittsburgh PA 15219