| Code | Name | Region |
|---|---|---|
| USSN9 | Nichols | NY |
| USNMQ | Newton | IL |
| USEWK | Newton | KS |
| USNTN | Newton | MA |
| USNTM | Newton | MS |
| USOXP | Newton | NC |
| USNWU | Newton | NH |
| USNWN | Newton | NJ |
| USNXW | Newton | TX |
| USQKW | Newton | WI |
| USN2C | Newton Centre | MA |
| USNFS | Newton Falls | NY |
| USZNF | Newton Falls | OH |
| USNGV | Newton Grove | NC |
| USTGX | Newton Highlands | MA |
| USNFM | Newton Upper Falls | MA |
| USNN4 | Newtonville | IN |
| USNNF | Newtonville | MA |
| USNN5 | Newtonville | NY |
| USNTC | Newtown | CT |
| USNXE | Newtown | IN |
| USNWH | Newport | NH |
| USP5W | Newport | OH |
| USNPO | Newport | OR |
| USNPT | Newport | RI |
| USNPR | Newport | TN |
| USVAP | Newport | VA |
| USEFK | Newport | VT |
| USNP6 | Newport | WA |
| USJNP | Newport Beach | CA |
| USQPQ | Newport Coast | CA |
| USNNS | Newport News | VA |
| USNRP | Newport, Perry | PA |
| USQNE | Newportville | PA |
| US8RY | Newry | ME |
| USNQR | Newry | PA |
| USWWT | Newtok | AK |
| US2N2 | Newton | AL |
| USNEO | Newton | GA |
| USTNU | Newton | IA |
| USNQG | Newington | VA |
| USNR6 | Newkirk | OH |
| US9KI | Newkirk | OK |
| USNMW | Newman | CA |
| USNAG | Newman Grove | NE |
| USNL7 | Newman Lake | WA |
| USUWN | Newmanstown | PA |
| USKT9 | Newmarket | MD |
| USNMK | Newmarket | NH |
| USW4O | Newmarket | VA |