| Code | Name | Region |
|---|---|---|
| USMPV | Barre-montpelier Apt | VT |
| USBRQ | Barrington | IL |
| USQRG | Barrington | NH |
| USBRN | Barrington | NJ |
| USBRZ | Barrington | RI |
| USYRR | Barron | WI |
| USBRW | Barrow | AK |
| USYRB | Barry | IL |
| USBZW | Barstow | CA |
| USB3S | Barstow | TX |
| USBTI | Barter Island | AK |
| USBVO | Bartlesville | OK |
| USBIJ | Bartlett | IL |
| USBA2 | Bartlett | NE |
| USZLB | Bartlett | NH |
| USBBP | Bartlett | TN |
| USXTX | Bartlett | TX |
| USBSP | Bartlett Springs | CA |
| USBAO | Barlow | OH |
| USVM9 | Barnard | VT |
| USVL3 | Barnardsville | NC |
| USBG7 | Barnegat | NJ |
| USB6N | Barnes | WI |
| USBAV | Barnesville | GA |
| USB7N | Barnesville | MN |
| USBZC | Barnesville | OH |
| USBV3 | Barnesville | PA |
| USBJR | Barnet | VT |
| USVDX | Barneveld | WI |
| USBHT | Barnhart | MO |
| USUVB | Barnsdall | OK |
| USBB6 | Barnstable | MA |
| USBA8 | Barnstead | NH |
| USB3R | Barnum | MN |
| USBNL | Barnwell | SC |
| USZ9B | Baroda | MI |
| US9BA | Barrackville | WV |
| USBJE | Barre | MA |
| USBHB | Bar Harbor | ME |
| USRNI | Bar Nunn | WY |
| USXBQ | Baraboo | WI |
| USRGA | Baraga | MI |
| USBNF | Baranof | AK |
| USNAX | Barbers Point (oahu) | HI |
| USBAT | Barberton | OH |
| USBBT | Barbours Cut | TX |
| USRUX | Barboursville | VA |
| USBAB | Barboursville | WV |
| USBBZ | Barbourville | KY |
| USBFK | Barclay | MD |