| Country | GEC | Names | Letter | Internet |
| Afghanistan | AF | AF | AFG | .af |
| Akrotiri | AX | – | – | – |
| Albania | AL | AL | ALB | .al |
| Algeria | AG | DZ | DZA | .dz |
| American Samoa | AQ | AS | ASM | .as |
| Andorra | AN | AD | AND | .ad |
| Angola | AO | AO | AGO | .ao |
| Anguilla | AV | AI | AIA | .ai |
| Antarctica | AY | AQ | ATA | .aq |
| Antigua and Barbuda | AC | AG | ATG | .ag |
| Argentina | AR | AR | ARG | .ar |
| Armenia | AM | AM | ARM | .am |
| Aruba | AA | AW | ABW | .aw |
| Ashmore and Cartier Islands | AT | – | – | – |
| Australia | AS | AU | AUS | .au |
| Austria | AU | AT | AUT | .at |
| Azerbaijan | AJ | AZ | AZE | .az |
| Bahamas, The | BF | BS | BHS | .bs |
| Bahrain | BA | BH | BHR | .bh |
| Baker Island | FQ | – | – | – |
| Bangladesh | BG | BD | BGD | .bd |
| Barbados | BB | BB | BRB | .bb |
| Bassas da India | BS | – | – | – |
| Belarus | BO | BY | BLR | .by |
| Belgium | BE | BE | BEL | .be |
| Belize | BH | BZ | BLZ | .bz |
| Benin | BN | BJ | BEN | .bj |
| Bermuda | BD | BM | BMU | .bm |
| Bhutan | BT | BT | BTN | .bt |
| Bolivia | BL | BO | BOL | .bo |
| Bosnia and Herzegovina | BK | BA | BIH | .ba |
| Botswana | BC | BW | BWA | .bw |
| Bouvet Island | BV | BV | BVT | .bv |
| Brazil | BR | BR | BRA | .br |
| British Indian Ocean Territory | IO | IO | IOT | .io |
| British Virgin Islands | VI | VG | VGB | .vg |
| Brunei | BX | BN | BRN | .bn |
| Bulgaria | BU | BG | BGR | .bg |
| Burkina Faso | UV | BF | BFA | .bf |
| Burma | BM | MM | MMR | .mm |
| Burundi | BY | BI | BDI | .bi |
| Cabo Verde | CV | CV | CPV | .cv |
| Cambodia | CB | KH | KHM | .kh |
| Cameroon | CM | CM | CMR | .cm |
| Canada | CA | CA | CAN | .ca |
| Cayman Islands | CJ | KY | CYM | .ky |
| Central African Republic | CT | CF | CAF | .cf |
| Chad | CD | TD | TCD | .td |
| Chile | CI | CL | CHL | .cl |
| China | CH | CN | CHN | .cn |
| Christmas Island | KT | CX | CXR | .cx |
| Clipperton Island | IP | – | – | – |
| Cocos (Keeling) Islands | CK | CC | CCK | .cc |
| Colombia | CO | CO | COL | .co |
| Comoros | CN | KM | COM | .km |
| Congo, Democratic Republic of the | CG | CD | COD | .cd |
| Congo, Republic of the | CF | CG | COG | .cg |
| Cook Islands | CW | CK | COK | .ck |
| Coral Sea Islands | CR | – | – | – |
| Costa Rica | CS | CR | CRI | .cr |
| Cote d’Ivoire | IV | CI | CIV | .ci |
| Croatia | HR | HR | HRV | .hr |
| Cuba | CU | CU | CUB | .cu |
| Curacao | UC | CW | CUW | .cw |
| Cyprus | CY | CY | CYP | .cy |
| Czechia | EZ | CZ | CZE | .cz |
| Denmark | DA | DK | DNK | .dk |
| Dhekelia | DX | – | – | – |
| Djibouti | DJ | DJ | DJI | .dj |
| Dominica | DO | DM | DMA | .dm |
| Dominican Republic | DR | DO | DOM | .do |
| Ecuador | EC | EC | ECU | .ec |
| Egypt | EG | EG | EGY | .eg |
| El Salvador | ES | SV | SLV | .sv |
| Equatorial Guinea | EK | GQ | GNQ | .gq |
| Eritrea | ER | ER | ERI | .er |
| Estonia | EN | EE | EST | .ee |
| Ethiopia | ET | ET | ETH | .et |
| Europa Island | EU | – | – | – |
| Falkland Islands (Islas Malvinas) | FK | FK | FLK | .fk |
| Faroe Islands | FO | FO | FRO | .fo |
| Fiji | FJ | FJ | FJI | .fj |
| Finland | FI | FI | FIN | .fi |
| France | FR | FR | FRA | .fr |
| France, Metropolitan | – | FX | FXX | .fx |
| French Guiana | FG | GF | GUF | .gf |
| French Polynesia | FP | PF | PYF | .pf |
| French Southern and Antarctic Lands | FS | TF | ATF | .tf |
| Gabon | GB | GA | GAB | .ga |
| Gambia, The | GA | GM | GMB | .gm |
| Gaza Strip | GZ | PS | PSE | .ps |
| Georgia | GG | GE | GEO | .ge |
| Germany | GM | DE | DEU | .de |
| Ghana | GH | GH | GHA | .gh |
| Gibraltar | GI | GI | GIB | .gi |
| Glorioso Islands | GO | – | – | – |
| Greece | GR | GR | GRC | .gr |
| Greenland | GL | GL | GRL | .gl |
| Grenada | GJ | GD | GRD | .gd |
| Guadeloupe | GP | GP | GLP | .gp |
| Guam | GQ | GU | GUM | .gu |
| Guatemala | GT | GT | GTM | .gt |
| Guernsey | GK | GG | GGY | .gg |
| Guinea | GV | GN | GIN | .gn |
| Guinea-Bissau | PU | GW | GNB | .gw |
| Guyana | GY | GY | GUY | .gy |
| Haiti | HA | HT | HTI | .ht |
| Heard Island and McDonald Islands | HM | HM | HMD | .hm |
| Holy See (Vatican City) | VT | VA | VAT | .va |
| Honduras | HO | HN | HND | .hn |
| Hong Kong | HK | HK | HKG | .hk |
| Howland Island | HQ | – | – | – |
| Hungary | HU | HU | HUN | .hu |
| Iceland | IC | IS | ISL | .is |
| India | IN | IN | IND | .in |
| Indonesia | ID | ID | IDN | .id |
| Iran | IR | IR | IRN | .ir |
| Iraq | IZ | IQ | IRQ | .iq |
| Ireland | EI | IE | IRL | .ie |
| Isle of Man | IM | IM | IMN | .im |
| Israel | IS | IL | ISR | .il |
| Italy | IT | IT | ITA | .it |
| Jamaica | JM | JM | JAM | .jm |
| Jan Mayen | JN | – | – | – |
| Japan | JA | JP | JPN | .jp |
| Jarvis Island | DQ | – | – | – |
| Jersey | JE | JE | JEY | .je |
| Johnston Atoll | JQ | – | – | – |
| Jordan | JO | JO | JOR | .jo |
| Juan de Nova Island | JU | – | – | – |
| Kazakhstan | KZ | KZ | KAZ | .kz |
| Kenya | KE | KE | KEN | .ke |
| Kingman Reef | KQ | – | – | – |
| Kiribati | KR | KI | KIR | .ki |
| Korea, North | KN | KP | PRK | .kp |
| Korea, South | KS | KR | KOR | .kr |
| Kosovo | KV | XK | XKS | – |
| Kuwait | KU | KW | KWT | .kw |
| Kyrgyzstan | KG | KG | KGZ | .kg |
| Laos | LA | LA | LAO | .la |
| Latvia | LG | LV | LVA | .lv |
| Lebanon | LE | LB | LBN | .lb |
| Lesotho | LT | LS | LSO | .ls |
| Liberia | LI | LR | LBR | .lr |
| Libya | LY | LY | LBY | .ly |
| Liechtenstein | LS | LI | LIE | .li |
| Lithuania | LH | LT | LTU | .lt |
| Luxembourg | LU | LU | LUX | .lu |
| Macau | MC | MO | MAC | .mo |
| Macedonia | MK | MK | MKD | .mk |
| Madagascar | MA | MG | MDG | .mg |
| Malawi | MI | MW | MWI | .mw |
| Malaysia | MY | MY | MYS | .my |
| Maldives | MV | MV | MDV | .mv |
| Mali | ML | ML | MLI | .ml |
| Malta | MT | MT | MLT | .mt |
| Marshall Islands | RM | MH | MHL | .mh |
| Martinique | MB | MQ | MTQ | .mq |
| Mauritania | MR | MR | MRT | .mr |
| Mauritius | MP | MU | MUS | .mu |
| Mayotte | MF | YT | MYT | .yt |
| Mexico | MX | MX | MEX | .mx |
| Micronesia, Federated States of | FM | FM | FSM | .fm |
| Midway Islands | MQ | – | – | – |
| Moldova | MD | MD | MDA | .md |
| Monaco | MN | MC | MCO | .mc |
| Mongolia | MG | MN | MNG | .mn |
| Montenegro | MJ | ME | MNE | .me |
| Montserrat | MH | MS | MSR | .ms |
| Morocco | MO | MA | MAR | .ma |
| Mozambique | MZ | MZ | MOZ | .mz |
| Myanmar | – | – | – | – |
| Namibia | WA | NA | NAM | .na |
| Nauru | NR | NR | NRU | .nr |
| Navassa Island | BQ | – | – | – |
| Nepal | NP | NP | NPL | .np |
| Netherlands | NL | NL | NLD | .nl |
| Netherlands Antilles | NT | .an | ||
| New Caledonia | NC | NC | NCL | .nc |
| New Zealand | NZ | NZ | NZL | .nz |
| Nicaragua | NU | NI | NIC | .ni |
| Niger | NG | NE | NER | .ne |
| Nigeria | NI | NG | NGA | .ng |
| Niue | NE | NU | NIU | .nu |
| Norfolk Island | NF | NF | NFK | .nf |
| Northern Mariana Islands | CQ | MP | MNP | .mp |
| Norway | NO | NO | NOR | .no |
| Oman | MU | OM | OMN | .om |
| Pakistan | PK | PK | PAK | .pk |
| Palau | PS | PW | PLW | .pw |
| Palmyra Atoll | LQ | – | – | – |
| Panama | PM | PA | PAN | .pa |
| Papua New Guinea | PP | PG | PNG | .pg |
| Paracel Islands | PF | – | – | – |
| Paraguay | PA | PY | PRY | .py |
| Peru | PE | PE | PER | .pe |
| Philippines | RP | PH | PHL | .ph |
| Pitcairn Islands | PC | PN | PCN | .pn |
| Poland | PL | PL | POL | .pl |
| Portugal | PO | PT | PRT | .pt |
| Puerto Rico | RQ | PR | PRI | .pr |
| Qatar | QA | QA | QAT | .qa |
| Reunion | RE | RE | REU | .re |
| Romania | RO | RO | ROU | .ro |
| Russia | RS | RU | RUS | .ru |
| Rwanda | RW | RW | RWA | .rw |
| Saint Barthelemy | TB | BL | BLM | .bl |
| Saint Helena, Ascension, and Tristan da Cunha | SH | SH | SHN | .sh |
| Saint Kitts and Nevis | SC | KN | KNA | .kn |
| Saint Lucia | ST | LC | LCA | .lc |
| Saint Martin | RN | MF | MAF | .mf |
| Saint Pierre and Miquelon | SB | PM | SPM | .pm |
| Saint Vincent and the Grenadines | VC | VC | VCT | .vc |
| Samoa | WS | WS | WSM | .ws |
| San Marino | SM | SM | SMR | .sm |
| Sao Tome and Principe | TP | ST | STP | .st |
| Saudi Arabia | SA | SA | SAU | .sa |
| Senegal | SG | SN | SEN | .sn |
| Serbia | RI | RS | SRB | .rs |
| Seychelles | SE | SC | SYC | .sc |
| Sierra Leone | SL | SL | SLE | .sl |
| Singapore | SN | SG | SGP | .sg |
| Sint Maarten | NN | SX | SXM | .sx |
| Slovakia | LO | SK | SVK | .sk |
| Slovenia | SI | SI | SVN | .si |
| Solomon Islands | BP | SB | SLB | .sb |
| Somalia | SO | SO | SOM | .so |
| South Africa | SF | ZA | ZAF | .za |
| South Georgia and the Islands | SX | GS | SGS | .gs |
| South Sudan | OD | SS | SSD | – |
| Spain | SP | ES | ESP | .es |
| Spratly Islands | PG | – | – | – |
| Sri Lanka | CE | LK | LKA | .lk |
| Sudan | SU | SD | SDN | .sd |
| Suriname | NS | SR | SUR | .sr |
| Svalbard | SV | SJ | SJM | .sj |
| Swaziland | WZ | SZ | SWZ | .sz |
| Sweden | SW | SE | SWE | .se |
| Switzerland | SZ | CH | CHE | .ch |
| Syria | SY | SY | SYR | .sy |
| Taiwan | TW | TW | TWN | .tw |
| Tajikistan | TI | TJ | TJK | .tj |
| Tanzania | TZ | TZ | TZA | .tz |
| Thailand | TH | TH | THA | .th |
| Timor-Leste | TT | TL | TLS | .tl |
| Togo | TO | TG | TGO | .tg |
| Tokelau | TL | TK | TKL | .tk |
| Tonga | TN | TO | TON | .to |
| Trinidad and Tobago | TD | TT | TTO | .tt |
| Tromelin Island | TE | – | – | – |
| Tunisia | TS | TN | TUN | .tn |
| Turkey | TU | TR | TUR | .tr |
| Turkmenistan | TX | TM | TKM | .tm |
| Turks and Caicos Islands | TK | TC | TCA | .tc |
| Tuvalu | TV | TV | TUV | .tv |
| Uganda | UG | UG | UGA | .ug |
| Ukraine | UP | UA | UKR | .ua |
| United Arab Emirates | AE | AE | ARE | .ae |
| United Kingdom | UK | GB | GBR | .uk |
| United States | US | US | USA | .us |
| United States Minor Outlying Islands | – | UM | UMI | .um |
| Uruguay | UY | UY | URY | .uy |
| Uzbekistan | UZ | UZ | UZB | .uz |
| Vanuatu | NH | VU | VUT | .vu |
| Venezuela | VE | VE | VEN | .ve |
| Vietnam | VM | VN | VNM | .vn |
| Virgin Islands | VQ | VI | VIR | .vi |
| Virgin Islands (UK) | – | – | – | .vg |
| Virgin Islands (US) | – | – | – | .vi |
| Wake Island | WQ | – | – | – |
| Wallis and Futuna | WF | WF | WLF | .wf |
| West Bank | WE | PS | PSE | .ps |
| Western Sahara | WI | EH | ESH | .eh |
| Western Samoa | – | – | – | .ws |