| Code | Name | Region |
|---|---|---|
| USRFO | Rockford | OH |
| USROF | Rockford | TN |
| USVKD | Rockford | WA |
| USRGM | Rockingham | NC |
| USKGH | Rockingham | VT |
| USRCA | Rockland | MA |
| USRKD | Rockland | ME |
| USKLA | Rockland | NY |
| USRQD | Rockland | WI |
| USRKE | Rockledge | FL |
| USK8L | Rockledge | GA |
| USRXH | Rockleigh | NJ |
| USRKL | Rocklin | CA |
| USRKA | Rockmart | GA |
| USR63 | Rockport | IL |
| USRHC | Rock Hill | NC |
| USR8L | Rock Hill | NY |
| USRKH | Rock Hill | SC |
| USRKI | Rock Island | IL |
| US4OK | Rock Island | WA |
| USKPR | Rock Port | MO |
| USRZR | Rock Rapids | IA |
| USXRS | Rock Springs | GA |
| USVWS | Rock Springs | WI |
| USRKS | Rock Springs | WY |
| USXRT | Rock Tavern | NY |
| USRCV | Rock Valley | IA |
| USRKJ | Rockaway | NJ |
| USRW8 | Rockaway Beach | NY |
| USRYK | Rockaway Parks | NY |
| USROE | Rockdale | IL |
| USRCK | Rockdale | TX |
| US9RC | Rocket Center | WV |
| USRF4 | Rockfall | CT |
| USYIC | Rockfield | KY |
| USROH | Rochester | IL |
| USRCR | Rochester | IN |
| USK5Y | Rochester | KY |
| USRCS | Rochester | MA |
| USRCZ | Rochester | MI |
| USRST | Rochester | MN |
| USROR | Rochester | NH |
| USROC | Rochester | NY |
| USRHR | Rochester | PA |
| USRXT | Rochester | TX |
| US9RH | Rochester | VT |
| USRCW | Rochester | WA |
| USOHX | Rochester | WI |
| USRHH | Rochester Hills/detroit | MI |
| USK9C | Rock | WV |