| Code | Name | Region |
|---|---|---|
| USDNX | De Smet | SD |
| US5FR | De Soto | IA |
| USOT4 | De Soto | IL |
| USDZO | De Soto | KS |
| USDSQ | De Soto | MO |
| USZ2C | De Soto | TX |
| USDT4 | De Tour Village | MI |
| USDWA | De Witt | AR |
| USDWJ | De Witt | IA |
| USDWT | De Witt | MI |
| USDWX | De Witt | NE |
| USDWN | De Witt | NY |
| USDDW | Deadwood | SD |
| USDAF | Deal | NJ |
| USDEJ | Deans | NJ |
| USD2E | Deansboro | NY |
| USDEO | Dearborn | MI |
| USDHG | Dearborn Heights | MI |
| USDR4 | Dearing | GA |
| USDTH | Death Valley | CA |
| USDAT | Dayton | TN |
| USDTX | Dayton | TX |
| USDYV | Dayton | VA |
| USDYW | Dayton | WA |
| USDAB | Daytona Beach | FL |
| USDLK | Dayville | CT |
| USIYV | Dayville | OR |
| USDQU | De Beque | CO |
| USDFO | De Forest | WI |
| USDFN | De Funiak Springs | FL |
| USDU5 | De Funiak Springs | FL |
| USDEK | De Kalb | IL |
| USDKL | De Kalb | MS |
| USDKB | De Kalb | TX |
| USDLD | De Land | FL |
| USZCQ | De Leon | TX |
| USDLF | De Leon Springs | FL |
| USDRW | De Pere | WI |
| USDQZ | De Queen | AR |
| USDRI | De Ridder | LA |
| USDS9 | Daviston | AL |
| USDVV | Davisville | RI |
| USIII | Davisville, Wood | WV |
| USDA6 | Davy | WV |
| USTDD | Dawn | TX |
| USDAW | Dawson | GA |
| USDWM | Dawson | MN |
| USDSG | Dawson Springs | KY |
| USDVX | Dawsonville | GA |
| USDYC | Days Creek | OR |