| Code | Name | Region |
|---|---|---|
| UST5R | Randlett | UT |
| USRDH | Randolph | MA |
| USR8D | Randolph | ME |
| USRD8 | Randolph | MN |
| USRA6 | Raleigh | IL |
| USRAG | Raleigh | NC |
| USXKZ | Ralls | TX |
| USJPH | Ralph | MI |
| USRLQ | Ralston | IA |
| USRAX | Ralston | NE |
| USRYP | Ramapo | NY |
| USRA2 | Ramer | AL |
| USRNX | Ramona | CA |
| USRXM | Ramona | OK |
| USRMP | Rampart | AK |
| USRSR | Ramseur | NC |
| USRMY | Ramsey | IN |
| USQNS | Ramsey | MN |
| USRMJ | Ramsey | NJ |
| USRBR | Ranburne | AL |
| USRW7 | Ranchester | WY |
| USRBK | Rancho | CA |
| USRBQ | Rancho Belago | CA |
| USRAC | Racine | WI |
| USQRD | Radcliff | KY |
| USDCF | Radcliffe | IA |
| USXLD | Radford | VA |
| USRPS | Radium Springs | NM |
| USRAR | Radnor | PA |
| USRM9 | Radom | IL |
| USRFN | Raeford | NC |
| USYRG | Ragland | AL |
| USRHN | Rahns | PA |
| USRAH | Rahway | NJ |
| USRAY | Rahway | OH |
| USRAU | Raiford | FL |
| USYRI | Rainbow | AL |
| USXRC | Rainbow City | AL |
| USRNU | Rainelle | WV |
| USRN3 | Rainier | MN |
| USRAI | Rainier | OR |
| USQIE | Rainier | WA |
| USRNV | Rainsville | AL |
| USQNC | Quincy | WA |
| USKWN | Quinhagak | AK |
| US9QL | Quinlan | MT |
| USQN2 | Quinnesec | MI |
| USQUT | Quintana | TX |
| USQNR | Quinter | KS |
| USJQT | Quinton | AL |