| Code | Name | Region |
|---|---|---|
| USBB3 | Broken Bow | OK |
| USBM3 | Bromley | KY |
| USB9A | Bronaugh | MO |
| USWO9 | Bronson | IA |
| USQTX | Bronson | MI |
| USTSZ | Bronston | KY |
| USOOO | Bronwood | GA |
| USBRX | Bronx | NY |
| USBZL | Bristol | VT |
| USBSJ | Bristol | WI |
| USTRI | Bristol-johnson City-kingsport (tri-cities Regional) Apt | TN |
| USP7D | Bristow | IA |
| USYIW | Bristow | OK |
| USVBW | Bristow | VA |
| USDJT | Britt | IA |
| USTZJ | Britton | MI |
| USTTO | Britton | SD |
| USBB8 | Broad Brook | CT |
| USFU8 | Broad Run | VA |
| US7BR | Broadlands | VA |
| USBDX | Broadus | MT |
| USBRJ | Broadview | IL |
| USDVH | Broadview Heights | OH |
| USBV2 | Broadview, Summit | OH |
| USBW7 | Broadway | NC |
| USBPQ | Broadway | NJ |
| USBDW | Broadway | VA |
| USB3K | Brock | TX |
| USXCJ | Brillion | WI |
| USBRM | Brimfield | IL |
| USBMY | Brimfield | IN |
| USBF5 | Brimfield | MA |
| USBZX | Brimfield | OH |
| USBJM | Brimley | MI |
| USRIY | Brinkley | AR |
| USB2N | Brinnon | WA |
| USBSA | Brisbane | CA |
| USBRT | Bristol | CO |
| USBCO | Bristol | CT |
| USBT5 | Bristol | FL |
| USQBX | Bristol | IL |
| USBSX | Bristol | IN |
| USIZO | Bristol | ME |
| USIOB | Bristol | NH |
| USUAC | Bristol | PA |
| USBSE | Bristol | RI |
| USBSO | Bristol | TN |
| USBFS | Bristol | VA |
| USB7S | Bridgewater | SD |
| USBHR | Bridgewater | VA |