Prosečne GPS koordinate za poštanski broj 17939: 40.749, -76.454
Spisak gradova:
>> Helfenstein 17939, Pennsylvania, Northumberland County, GPS koordinate: 40.7492,-76.4536
Spisak gradova:
>> Helfenstein 17939, Pennsylvania, Northumberland County, GPS koordinate: 40.7492,-76.4536