| Code | Name | Region |
|---|---|---|
| USNT7 | Nottingham | MD |
| USNJX | Northstar | CA |
| USNUM | Northumberland | PA |
| USNVL | Northvale | NJ |
| USNTV | Northville | MI |
| USNVR | Northville (riverhead) | NY |
| USORT | Northway | AK |
| USNZD | Northwood | IA |
| USWO6 | Northwood | ND |
| USN5W | Northwood | NH |
| USNW4 | Northwood, Logan | OH |
| USNHW | Northwood, Wood | OH |
| USNT8 | Norton | KS |
| USNNM | Norton | MA |
| USNOG | Norton | VA |
| USNRT | Norton | VT |
| USNTR | Norton Shores | MI |
| USNNU | Norton, Summit | OH |
| USNV2 | Nortonville | KS |
| USOJV | Nortonville | KY |
| USNAQ | Norwalk | CA |
| USOHC | Northeast Cape | AK |
| USEJB | Northern Cambria | PA |
| USXJO | Northfield | IL |
| USNF8 | Northfield | MA |
| USNRE | Northfield | MN |
| USQQF | Northfield | NH |
| USNHL | Northfield | NJ |
| USQNF | Northfield | OH |
| USNTF | Northfield | VT |
| USNT2 | Northford | CT |
| USNKZ | Northfork | WV |
| USNGT | Northgate | ND |
| USNGL | Northglenn | CO |
| USNTI | Northlake | IL |
| US9NL | Northlake | TX |
| USNM4 | Northmoor | MO |
| USNHP | Northport | AL |
| USZZH | Northport | MI |
| USNQP | Northport | NY |
| USNRJ | Northridge | CA |
| USNHV | North Vassalboro | ME |
| USNVZ | North Venice | IL |
| USNVY | North Vernon | IN |
| USZJY | North Versailles | PA |
| USNFT | North Wales | PA |
| USNJW | North Walpole | NH |
| USWN3 | North Webster | IN |
| USNWY | North Weymouth | MA |
| USNXU | North White Plains | NY |