| Code | Name | Region |
|---|---|---|
| USBXM | Bridgeport | AL |
| USIEP | Bridgeport | CA |
| USBP3 | Bridgeport | CO |
| USBDR | Bridgeport | CT |
| US4BP | Bridgeport | IL |
| USBPM | Bridgeport | MI |
| USBGP | Bridgeport | NE |
| USBPG | Bridgeport | NJ |
| USBM6 | Bremond | TX |
| USXCO | Brenham | TX |
| USBJN | Brent | AL |
| USBXF | Brentwood | CA |
| USBXG | Brentwood | MD |
| USJBW | Brentwood | MO |
| USRTW | Brentwood | NH |
| USBQB | Brentwood | NY |
| USBWE | Brentwood | TN |
| USBW6 | Bretton Woods | NH |
| USBCV | Brevard | NC |
| USBM4 | Brevort | MI |
| USBXH | Brewer | ME |
| USB2W | Brewerton | NY |
| USBCW | Brewster | MA |
| US6BS | Brewster | MN |
| USBWZ | Brewster | NY |
| USBRR | Brewster | OH |
| USBXI | Brewster | WA |
| USBXJ | Brewton | AL |
| USBQE | Brea | CA |
| USBQZ | Breaks | VA |
| USBXB | Breaux Bridge | LA |
| USEKG | Breckenridge | CO |
| USKRG | Breckenridge | MI |
| USBYY | Breckenridge | MN |
| USBKD | Breckenridge | TX |
| USKDQ | Breckenridge Hills | MO |
| USBKV | Brecksville | OH |
| USBD6 | Breda | IA |
| USBG8 | Breeding | KY |
| USBXD | Breese | IL |
| USZWB | Breezewood | PA |
| USBVI | Breinigsville | PA |
| USREM | Bremen | AL |
| USEEL | Bremen | GA |
| USBXE | Bremen | IN |
| USRMZ | Bremen | ME |
| USBEM | Bremen | OH |
| USPWT | Bremerton | WA |
| USBFC | Branford | CT |
| USBJ4 | Branford | FL |