The ZIP code belongs to New Alexandria, Pennsylvania , located in Westmoreland County.

: New Alexandria is part of the larger Derry Area, which has deep roots in the early industrial development of Western Pennsylvania, particularly in coal mining and the railroad industry.

: According to the U.S. Postal Service decoding system , the "1" indicates the Northeast region (encompassing Delaware, New York, and Pennsylvania), while the "56" narrows it down to the Western Pennsylvania sectional center. Historical Significance

: The area is bordered by the Loyalhanna Creek , which played a strategic role during the French and Indian War, specifically near the nearby Fort Ligonier. Common "156XX" Typos