| Code | Name | Region |
|---|---|---|
| USPMF | Plymouth | FL |
| USYIQ | Plymouth | IL |
| USPLY | Plymouth | IN |
| USPYM | Plymouth | MA |
| US8PY | Plymouth | ME |
| USUXY | Plymouth | MI |
| USPYO | Plymouth | MN |
| USXKN | Plymouth | NC |
| USPVH | Plymouth | NH |
| USPLH | Plymouth | OH |
| USPMY | Plymouth | PA |
| USXOU | Plymouth | UT |
| USPAP | Pleasant Plain | OH |
| USPPL | Pleasant Plains | IL |
| USXPP | Pleasant Prairie | IA |
| USPLP | Pleasant Prairie | WI |
| USPZ6 | Pleasant Shade | TN |
| USPU7 | Pleasant Unity | PA |
| USPEY | Pleasant Valley | MO |
| USZHJ | Pleasant Valley | NY |
| USNIW | Pleasant View | TN |
| USPWZ | Pleasant View, Cheatham | TN |
| USXOX | Pleasant View, Weber | UT |
| USJBS | Pleasanton | CA |
| USDTF | Pleasanton | KS |
| USPT5 | Pleasanton | TX |
| USVV3 | Pleasantville | IA |
| USUXV | Pleasantville | NJ |
| USVPP | Pleasantville | NY |
| US9PT | Pleasantville | TN |
| USPGK | Pleasure Ridge Park | KY |
| USEIU | Pleasureville | KY |
| USPJY | Pleasant City | OH |
| USPNG | Pleasant Gap | PA |
| USXTG | Pleasant Garden | NC |
| USTGO | Pleasant Grove | AL |
| USYPG | Pleasant Grove | CA |
| USPXG | Pleasant Grove | UT |
| USP8H | Pleasant Hall | PA |
| USPTR | Pleasant Harbour | AK |
| USPFH | Pleasant Hill | CA |
| USLSH | Pleasant Hill | IA |
| USPT9 | Pleasant Hill | IL |
| USPDH | Pleasant Hill | LA |
| USPTI | Pleasant Hill | MO |
| USP9T | Pleasant Hill | NC |
| USPL7 | Pleasant Hill | OR |
| USP4S | Pleasant Hill | TN |
| USPH7 | Pleasant Hills | PA |
| USPO3 | Pleasant Hope | MO |