| Code | Explanation | From | Through |
|---|---|---|---|
| AA | ARUBA | 01/01/1970 | Present |
| AC | ANTIGUA AND BARBUDA | 01/01/1970 | Present |
| AE | UNITED ARAB EMIRATES | 01/01/1970 | Present |
| AF | AFGHANISTAN | 01/01/1970 | Present |
| AG | ALGERIA | 01/01/1970 | Present |
| AJ | AZERBAIJAN | 01/01/1970 | Present |
| AL | ALBANIA | 01/01/1970 | Present |
| AM | ARMENIA | 01/01/1970 | Present |
| AN | ANDORRA | 01/01/1970 | Present |
| AO | ANGOLA | 01/01/1970 | Present |
| AQ | AMERICAN SAMOA | 01/01/1970 | Present |
| AR | ARGENTINA | 01/01/1970 | Present |
| AS | AUSTRALIA | 01/01/1970 | Present |
| AT | ASHMORE AND CARTIER ISLANDS | 01/01/1970 | Present |
| AU | AUSTRIA | 01/01/1970 | Present |
| AV | ANGUILLA | 01/01/1970 | Present |
| AX | AKROTIRI SOVEREIGN BASE AREA | 06/01/2007 | Present |
| AY | ANTARTICA | 01/01/1970 | Present |
| BA | BAHRAIN | 01/01/1970 | Present |
| BB | BARBADOS | 01/01/1970 | Present |
| BC | BOTSWANA | 01/01/1970 | Present |
| BD | BERMUDA | 01/01/1970 | Present |
| BE | BELGIUM | 01/01/1970 | Present |
| BF | BAHAMAS, THE | 01/01/1970 | Present |
| BG | BANGLADESH | 01/01/1970 | Present |
| BH | BELIZE | 01/01/1970 | Present |
| BK | BOSNIA AND HERZEGOVINA | 01/01/1970 | Present |
| BL | BOLIVIA | 01/01/1970 | Present |
| BM | BURMA | 01/01/1970 | Present |
| BN | BENIN | 01/01/1970 | Present |
| BO | BELARUS | 01/01/1970 | Present |
| BP | SOLOMON ISLANDS | 01/01/1970 | Present |
| BQ | NAVASSA ISLAN | 01/01/1970 | Present |
| BR | BRAZIL | 01/01/1970 | Present |
| BS | BASSAS DA INDIA | 01/01/1970 | Present |
| BT | BHUTAN | 01/01/1970 | Present |
| BU | BULGARIA | 01/01/1970 | Present |
| BV | BOUVET ISLAND | 01/01/1970 | Present |
| BX | BRUNEI | 01/01/1970 | Present |
| BY | BURUNDI | 01/01/1970 | Present |
| CA | CANADA | 01/01/1970 | Present |
| CB | CAMBODIA | 01/01/1970 | Present |
| CD | CHAD | 01/01/1970 | Present |
| CE | SRI LANKA | 01/01/1970 | Present |
| CF | CONGO | 01/01/1970 | Present |
| CG | CONGO, DEMOCRATIC REPUBLIC OF THE | 01/01/1970 | Present |
| CH | CHINA | 01/01/1970 | Present |
| CI | CHILE | 01/01/1970 | Present |
| CJ | CAYMAN ISLANDS | 01/01/1970 | Present |
| CK | COCOS (KEELING) ISLANDS | 01/01/1970 | Present |