| 18010 Ackermanville | 610/484 | Northampton County | Pennsylvania (PA) |
| 18010 Bangor | 610/484 | Northampton County | Pennsylvania (PA) |
| 18013 Bangor | 610/484 | Northampton County | Pennsylvania (PA) |
| 18050 Bangor | 610/484 | Northampton County | Pennsylvania (PA) |
| 18014 Bath | 610/484 | Northampton County | Pennsylvania (PA) |
| 18015 Bethlehem | 610/484 | Northampton County | Pennsylvania (PA) |
| 18016 Bethlehem | 610/484 | Northampton County | Pennsylvania (PA) |
| 18017 Bethlehem | 610/484 | Northampton County | Pennsylvania (PA) |
| 18018 Bethlehem | 610/484 | Northampton County | Pennsylvania (PA) |
| 18020 Bethlehem | 610/484 | Northampton County | Pennsylvania (PA) |
| 18003 Business Reply Mail | 610/484 | Northampton County | Pennsylvania (PA) |
| 18017 Butztown | 610/484 | Northampton County | Pennsylvania (PA) |
| 18014 Chapmans | 610/484 | Northampton County | Pennsylvania (PA) |
| 18035 Cherryville | 610/484 | Northampton County | Pennsylvania (PA) |
| 18042 College Hill | 610/484 | Northampton County | Pennsylvania (PA) |
| 18038 Danielsville | 610/484 | Northampton County | Pennsylvania (PA) |
| 18013 East Bangor | 610/484 | Northampton County | Pennsylvania (PA) |
| 18040 Easton | 610/484 | Northampton County | Pennsylvania (PA) |
| 18042 Easton | 610/484 | Northampton County | Pennsylvania (PA) |
| 18043 Easton | 610/484 | Northampton County | Pennsylvania (PA) |
| 18044 Easton | 610/484 | Northampton County | Pennsylvania (PA) |
| 18045 Easton | 610/484 | Northampton County | Pennsylvania (PA) |
| 18050 Flicksville | 610/484 | Northampton County | Pennsylvania (PA) |
| 18040 Forks Township | 610/484 | Northampton County | Pennsylvania (PA) |
| 18015 Fountain Hill | 610/484 | Northampton County | Pennsylvania (PA) |
| 18017 Freemansburg | 610/484 | Northampton County | Pennsylvania (PA) |
| 18042 Glendon | 610/484 | Northampton County | Pennsylvania (PA) |
| 18055 Hellertown | 610/484 | Northampton County | Pennsylvania (PA) |
| 18001 Lehigh Valley | 610/484 | Northampton County | Pennsylvania (PA) |
| 18002 Lehigh Valley | 610/484 | Northampton County | Pennsylvania (PA) |
| 18003 Lehigh Valley | 610/484 | Northampton County | Pennsylvania (PA) |
| 18063 Martins Creek | 610/484 | Northampton County | Pennsylvania (PA) |
| 18343 Mount Bethel | 570 | Northampton County | Pennsylvania (PA) |
| 18064 Nazareth | 610/484 | Northampton County | Pennsylvania (PA) |
| 18067 Northampton | 610/484 | Northampton County | Pennsylvania (PA) |
| 18043 Palmer | 610/484 | Northampton County | Pennsylvania (PA) |
| 18045 Palmer | 610/484 | Northampton County | Pennsylvania (PA) |
| 18045 Palmer Township | 610/484 | Northampton County | Pennsylvania (PA) |
| 18072 Pen Argyl | 610/484 | Northampton County | Pennsylvania (PA) |
| 18351 Portland | 570 | Northampton County | Pennsylvania (PA) |
| 18013 Roseto | 610/484 | Northampton County | Pennsylvania (PA) |
| 18083 Stockertown | 610/484 | Northampton County | Pennsylvania (PA) |
| 18085 Tatamy | 610/484 | Northampton County | Pennsylvania (PA) |
| 18086 Treichlers | 610/484 | Northampton County | Pennsylvania (PA) |
| 18088 Walnutport | 610/484 | Northampton County | Pennsylvania (PA) |
| 18042 West Easton | 610/484 | Northampton County | Pennsylvania (PA) |
| 18042 Williams Township | 610/484 | Northampton County | Pennsylvania (PA) |
| 18091 Wind Gap | 610/484 | Northampton County | Pennsylvania (PA) |