| Bahamas | +1242 |
| Bahrain | +973 |
| Bangladesh | +880 |
| Barbados | +1246 |
| Belarus | +375 |
| Belarus | +375 |
| Belgium | +32 |
| Belize | +501 |
| Benin | +229 |
| Bermuda | +1441 |
| Bhutan | +975 |
| Bolivia | +591 |
| Bonaire, Saint Eustatius and Saba | +5993 |
| Bosnia and Herzegovina | +387 |
| Botswana | +267 |
| Brazil | +55 |
| British Indian Ocean Territory | +246 |
| British Virgin Islands | +1284 |
| Brunei | +673 |
| Bulgaria | +359 |
| Burkina Faso | +226 |
| Burundi | +257 |