The following flags are not single unicode character.
They are made by combining 2 abstract unicode characters that are REGIONAL INDICATOR SYMBOL LETTER.
Basically, 2 letter codes of the country.
For example, United States is ๐บ (U+1F1FA: REGIONAL INDICATOR SYMBOL LETTER U) followed by ๐ธ (U+1F1F8: REGIONAL INDICATOR SYMBOL LETTER S)
Microsoft Windows 10 does not support these flag code combinations.
Apparently, their reason is, some country may get angry for political reasons.
Well Known Countries
๐บ๐ธ United States
๐จ๐ณ China
๐ฏ๐ต Japan
๐ฉ๐ช Germany
๐ฌ๐ง United Kingdom
๐ซ๐ท France
๐ฎ๐ณ India
๐ฎ๐น Italy
๐ง๐ท Brazil
๐จ๐ฆ Canada
๐ฐ๐ท South Korea
๐ท๐บ Russia
Northern Europe
๐ฎ๐ธ Iceland
๐ฉ๐ฐ Denmark
๐ณ๐ด Norway
๐ซ๐ฎ Finland
๐ธ๐ช Sweden
๐ฆ๐ฝ ร land Islands
Western Europe
๐ฌ๐ง United Kingdom
๐ฎ๐ช Ireland
๐ณ๐ฑ Netherlands
๐ง๐ช Belgium
๐ซ๐ท France
Southern Europe
๐ช๐ธ Spain
๐ต๐น Portugal
๐ฆ๐ฉ Andorra
๐ฎ๐น Italy
๐ป๐ฆ Vatican City
๐ฒ๐จ Monaco
๐ฒ๐ฉ Moldova
๐ท๐ด Romania
๐ง๐ฌ Bulgaria
๐ท๐ธ Serbia
๐ฒ๐ฐ Macedonia
๐ฝ๐ฐ Kosovo
๐ง๐ฆ Bosnia
๐ฌ๐ท Greece
๐ฒ๐ช Montenegro
๐ฆ๐ฑ Albania
East Asia
๐ท๐บ Russia
๐จ๐ณ China
๐ฏ๐ต Japan
๐ฐ๐ท South Korea
๐ฐ๐ต North Korea
๐ญ๐ฐ Hong Kong (China)
๐ฒ๐ด Macau (China)
๐น๐ผ Taiwan (Republic of China)
๐ฒ๐ณ Mongolia
South Asia
๐ฎ๐ณ India
๐ฑ๐ฐ Sri Lanka
๐ณ๐ต Nepal
๐ง๐น Bhutan
๐ง๐ฉ Bangladesh
๐ฒ๐ฒ Myanmar (Burma)
๐ฑ๐ฆ Laos
๐น๐ญ Thailand
๐ฐ๐ญ Cambodia
๐ป๐ณ Vietnam
๐ธ๐ฌ Singapore
๐ฒ๐พ Malaysia
๐ต๐ญ Philippines
๐ฎ๐ฉ Indonesia
Middle East
๐น๐ท Turkey
๐ฆ๐ช United Arab Emirates
๐ฎ๐ถ Iraq
๐ฎ๐ท Iran
๐ฎ๐ฑ Israel
๐ฐ๐ผ Kuwait
๐ธ๐ฆ Saudi Arabia
๐ถ๐ฆ Qatar
๐ง๐ญ Bahrain
๐ธ๐พ Syria
๐ฆ๐ซ Afghanistan
๐ฆ๐ฒ Armenia
๐ฑ๐ง Lebanon
๐ฏ๐ด Jordan
๐พ๐ช Yemen
๐ด๐ฒ Oman
๐ฌ๐ช Georgia
๐ฆ๐ฟ Azerbaijan
๐น๐ฒ Turkmenistan
๐บ๐ฟ Uzbekistan
๐น๐ฏ Tajikistan
๐ฐ๐ฌ Kyrgyzstan
๐ต๐ฐ Pakistan
๐จ๐พ Cyprus
North America
๐บ๐ธ United States
๐จ๐ฆ Canada
๐ฌ๐ฑ Greenland
Central America
๐ฒ๐ฝ Mexico
๐ฌ๐น Guatemala
๐ง๐ฟ Belize
๐ญ๐ณ Honduras
๐ณ๐ฎ Nicaragua
๐จ๐ท Costa Rica
๐ต๐ฆ Panama
๐จ๐บ Cuba
๐ง๐ธ Bahamas
๐ฉ๐ด Dominican Republic
๐ญ๐น Haiti
๐ต๐ท Puerto Rico
๐ฆ๐ฌ Antigua and Barbuda
๐ฒ๐ธ Montserrat
๐ฉ๐ฒ Dominica
๐ฒ๐ถ Martinique
๐ฑ๐จ St. Lucia
๐ง๐ง Barbados
๐ฌ๐ฉ Grenada
๐ป๐จ St. Vincent and Grenadines
๐น๐น Trinidad and Tobago
South America
๐ง๐ท Brazil
๐ฆ๐ท Argentina
๐ฏ๐ฒ Jamaica
๐ช๐จ Ecuador
๐จ๐ด Colombia
๐บ๐พ Uruguay
๐ป๐ช Venezuela
๐ต๐พ Paraguay
๐ง๐ด Bolivia
๐จ๐ฑ Chile
๐ฌ๐ซ French Guiana
๐ธ๐ท Suriname
๐ฌ๐พ Guyana
๐ต๐ช Peru
๐ฆ๐ผ Aruba
Africa
๐ช๐ฌ Egypt
๐ช๐ญ Western Sahara
๐ฒ๐ท Mauritania
๐ฌ๐ณ Guinea
๐ฉ๐ฟ Algeria
๐น๐ณ Tunisia
๐ฑ๐พ Libya
๐ช๐น Ethiopia
๐ฒ๐ฆ Morocco
๐ธ๐ฉ Sudan
๐ธ๐ธ South Sudan
๐น๐ฉ Chad
๐ณ๐ช Niger
๐ณ๐ฌ Nigeria
๐ฒ๐ฑ Mali
๐จ๐ซ Central African Republic
๐ฟ๐ฆ South Africa
๐บ๐ฌ Uganda
๐ฐ๐ช Kenya
๐น๐ฟ Tanzania
๐ฟ๐ฒ Zambia
๐ฟ๐ผ Zimbabwe
๐ง๐ผ Botswana
๐ฆ๐ด Angola
๐ณ๐ฆ Namibia
๐ท๐ผ Rwanda
๐ง๐ฎ Burundi
๐ช๐ท Eritrea
๐ฉ๐ฏ Djibouti
๐ธ๐ด Somalia
๐จ๐ฒ Cameroon
๐ฌ๐ถ Equatorial Guinea
๐ฌ๐ฆ Gabon
๐ธ๐ฟ Swaziland
๐ฒ๐ฌ Madagascar
๐ง๐ฏ Benin
๐น๐ฌ Togo
๐ฌ๐ญ Ghana
๐ง๐ซ Burkina Faso
๐ธ๐ณ Senegal
๐ฌ๐ฒ Gambia
๐ฌ๐ผ Guinea-Bissau
๐ธ๐ฑ Sierra Leone
๐ฑ๐ท Liberia
United Kingdom Related Flags
๐ฆ๐จ Ascension Island
๐ง๐ฒ Bermuda
๐ฆ๐ฎ Anguilla
๐ฉ๐ฌ Diego Garcia
๐จ๐ฐ Cook Islands
๐ซ๐ฏ Fiji
๐ซ๐ฐ Falkland Islands
๐ฌ๐ธ South Georgia and South Sandwich Islands
๐ญ๐ฒ Heard and Mcdonald Islands
๐ฎ๐ด British Indian Ocean Territory
๐ฐ๐พ Cayman Islands
๐ณ๐ฟ New Zealand
๐ต๐ณ Pitcairn Islands
๐น๐ฆ Tristan Da Cunha
๐น๐จ Turks and Caicos Islands
๐ป๐ฌ British Virgin Islands
๐น๐ป Tuvalu
US Related Regions
๐บ๐ฒ U.S. Outlying Islands
๐ป๐ฎ U.S. Virgin Islands
Oceania
๐ฆ๐บ Australia
๐ต๐ฌ Papua New Guinea
๐ธ๐ง Solomon Islands
๐ป๐บ Vanuatu
๐ณ๐จ New Caledonia
๐ณ๐ท Nauru
๐น๐ฐ Tokelau
๐ฆ๐ธ American Samoa
๐ณ๐บ Niue
๐น๐ด Tonga
๐ฐ๐ฎ Kiribati
๐ต๐ซ French Polynesia
๐ฌ๐บ Guam
Misc Small Countries
๐ง๐ฑ St. Barthรฉlemy
๐ง๐ณ Brunei
๐ง๐ถ Caribbean Netherlands
๐ง๐ป Bouvet Island
๐จ๐จ Cocos (Keeling) Islands
๐จ๐ฉ Congo - Kinshasa
๐จ๐ฌ Congo - Brazzaville
๐จ๐ฎ Cรดte D'Ivoire
๐จ๐ต Clipperton Island
๐จ๐ป Cape Verde
๐จ๐ผ Curaรงao
๐จ๐ฝ Christmas Island
๐ช๐ฆ Ceuta and Melilla
๐ซ๐ฒ Micronesia
๐ซ๐ด Faroe Islands
๐ฌ๐ฌ Guernsey
๐ฌ๐ฎ Gibraltar
๐ฌ๐ต Guadeloupe
๐ฎ๐จ Canary Islands
๐ฎ๐ฒ Isle of Man
๐ฏ๐ช Jersey
๐ฐ๐ฒ Comoros
๐ฐ๐ณ St. Kitts and Nevis
๐ฑ๐ฎ Liechtenstein
๐ฑ๐ธ Lesotho
๐ฒ๐ซ St. Martin
๐ฒ๐ญ Marshall Islands
๐ฒ๐ต Northern Mariana Islands
๐ฒ๐น Malta
๐ฒ๐บ Mauritius
๐ฒ๐ป Maldives
๐ฒ๐ผ Malawi
๐ฒ๐ฟ Mozambique
๐ณ๐ซ Norfolk Island
๐ต๐ฒ St. Pierre and Miquelon
๐ต๐ธ Palestinian Territories
๐ต๐ผ Palau
๐ท๐ช Rรฉunion
๐ธ๐จ Seychelles
๐ธ๐ญ St. Helena
๐ธ๐ฏ Svalbard and Jan Mayen
๐ธ๐ฒ San Marino
๐ธ๐น Sรฃo Tomรฉ and Prรญncipe
๐ธ๐ป El Salvador
๐ธ๐ฝ Sint Maarten
๐น๐ซ French Southern Territories
๐น๐ฑ Timor-Leste
๐ผ๐ซ Wallis and Futuna
๐ผ๐ธ Samoa
๐พ๐น Mayotte
Special
๐บ๐ณ United Nations
๐ช๐บ European Union
๐ฆ๐ถ Antarctica