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Postal Service Secondary Unit Designator - Abbreviations

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Secondary            Approved
Unit Designator      Abbreviation

APARTMENT            APT
BASEMENT             BSMT **
BUILDING             BLDG
DEPARTMENT           DEPT
FLOOR                FL
FRONT                FRNT **
HANGAR               HNGR   
LOBBY                LBBY **
LOT                  LOT    
LOWER                LOWR **
OFFICE               OFC  **
PENTHOUSE            PH   **
PIER                 PIER   
REAR                 REAR **  
ROOM                 RM     
SIDE                 SIDE **
SLIP                 SLIP   
SPACE                SPC
STOP                 STOP   
SUITE                STE    
TRAILER              TRLR   
UNIT                 UNIT   
UPPER                UPPR **


** Does not require Secondary Range Number to follow.