Prosečne GPS koordinate za poštanski broj 40829: 36.797, -83.265
Spisak gradova:
>> Grays Knob 40829, Kentucky, Harlan, GPS koordinate: 36.7974,-83.2645
Spisak gradova:
>> Grays Knob 40829, Kentucky, Harlan, GPS koordinate: 36.7974,-83.2645