| Code | Name | Region |
|---|---|---|
| USXVX | Ridgeway | NC |
| USZRW | Ridgeway | SC |
| USRIT | Ridgeway | WI |
| USRJV | Ridgeway, Henry | VA |
| USRWD | Ridgewood | NJ |
| USRGO | Ridgewood | NY |
| US5RW | Ridgway | CO |
| USRJW | Ridgway | IL |
| USXLE | Ridgway | PA |
| USRPK | Ridley Park | PA |
| USRZT | Ridott | IL |
| USRGL | Riegelwood | NC |
| USRZI | Rienzi | MS |
| USRIZ | Riesel | TX |
| USRIL | Rifle | CO |
| USRW3 | Richwoods | MO |
| USRIB | Rickenbacker International Apt | OH |
| USKU8 | Rickman | TN |
| USZIC | Rickreall | OR |
| USR2C | Rico | CO |
| USRIR | Riddle | OR |
| USRB6 | Riddlesburg | PA |
| USR5D | Ridge | NY |
| USGPJ | Ridge Spring | SC |
| USIGD | Ridgecrest | CA |
| USRT9 | Ridgecrest | NC |
| USRG8 | Ridgedale | MO |
| USRF3 | Ridgefield | CT |
| USUYE | Ridgefield | NJ |
| USRLF | Ridgefield | WA |
| USRFP | Ridgefield Park | NJ |
| USRDE | Ridgeland | MS |
| USRGE | Ridgeland | SC |
| USRZG | Ridgeland | WI |
| USRG9 | Ridgeley | WV |
| USRM4 | Richmond | UT |
| USRIC | Richmond | VA |
| USRMH | Richmond | VT |
| USRMW | Richmond | WI |
| USRJJ | Richmond Beach | WA |
| USIAF | Richmond Dale | OH |
| USRMS | Richmond Heights | OH |
| USRJH | Richmond Highlands | WA |
| USRJK | Richmond Hill | GA |
| USRIX | Richmond Hill/queens/new York | NY |
| USRHL | Richmondville | NY |
| USRC9 | Richton | MS |
| USRPJ | Richton Park | IL |
| USR5P | Richton Park | IL |
| USZIA | Richvale | CA |