| Code | Name | Region |
|---|---|---|
| USNQH | Annisquam Harbour | MA |
| USANB | Anniston | AL |
| USNNT | Anniston | MO |
| USA5N | Annona | TX |
| USVVY | Annville | KY |
| USAIL | Annville | PA |
| USANK | Anoka | MN |
| USO9N | Anson | ME |
| USA4S | Anson | TX |
| USAQZ | Ansonia | CT |
| USANS | Ansonia | OH |
| USVFR | Ansonville | NC |
| USQTP | Antelope | CA |
| USAJH | Anthem | AZ |
| USAT7 | Anthony | FL |
| USANY | Anthony | KS |
| USTNY | Anthony | NM |
| USUBM | Anthony | TX |
| USAGN | Angoon | AK |
| USRFK | Anguilla | MS |
| USAWG | Angwin | CA |
| USANI | Aniak | AK |
| USAM3 | Animas | NM |
| USNAJ | Anita | IA |
| USAIB | Anita Bay | AK |
| USAKE | Ankeny | IA |
| USANM | Anmoore | WV |
| USARB | Ann Arbor | MI |
| USYRU | Anna | IL |
| USNNA | Anna | OH |
| USBK6 | Anna | TX |
| US8NN | Anna Maria | FL |
| USXAT | Annandale | MN |
| USA7N | Annandale | NJ |
| USAJA | Annandale | VA |
| USDHD | Annandale-on-hudson | NY |
| USANP | Annapolis | MD |
| USAM4 | Annapolis | MO |
| USAN9 | Andover | NJ |
| USAN8 | Andover | NY |
| USAR3 | Andover | OH |
| USAJR | Andover | SD |
| USANU | Andrade | CA |
| USDGQ | Andreas | PA |
| USANF | Andrews | IN |
| USAGM | Andrews | NC |
| USADR | Andrews | SC |
| USUBO | Andrews | TX |
| USAS3 | Andrews Afb | MD |
| USAXX | Angel Fire | NM |