List of countries by ISO name and their calling codes. No one should have to go through the torture of finding these, so hopefully someone finds this useful.

international_calling_codes.json

{"Canada": "+1", "East Timor": "+670", "Réunion": "+262", "Montenegro": "+382", "Mali": "+223", "Cambodia": "+855", "Switzerland": "+41", "Ethiopia": "+251", "Saudi Arabia": "+966", "Aruba": "+297", "Swaziland": "+268", "Argentina": "+54", "Cameroon": "+237", "Wallis and Futuna Islands": "+681", "Bahrain": "+973", "Korea, Democratic People's Republic of": "+850", "Mayotte": "+262", "Haiti ": "+509", "Bosnia and Herzegovina": "+387", "Micronesia, Federated States of": "+691", "Jordan": "+962", "United States": "+1", "United States Minor Outlying Islands": "+1", "Trinidad and Tobago": "+1-868", "Greece": "+30", "Burkina Faso": "+226", "Senegal ": "+221", "Cuba (Guantanamo Bay)": "+5399", "Guantanamo Bay": "+5399", "Togo": "+228", "Spain": "+34", "Liberia": "+231", "French Antilles": "+596", "Nepal": "+977", "Tanzania, United Republic of": "+255", "Martinique": "+596", "Hungary": "+36", "Christmas Island": "+61-8", "French Guiana": "+594", "Niue": "+683", "Monaco": "+377", "Chatham Island (New Zealand)": "+64", "New Zealand": "+64", "Yemen": "+967", "Denmark": "+45", "Pakistan": "+92", "Albania": "+355", "Boa": "+685", "Slovakia": "+421", "Norfolk Island": "+672", "Norway": "+47", "India": "+91", "Azerbaijan": "+994", "Universal Personal Telecommunications (UPT)": "+878", "Lesotho": "+266", "Suriname": "+597", "Turkmenistan": "+993", "Turks and Caicos Islands": "1-649", "United Arab Emirates": "+971", "Somali Democratic Republic": "+252", "Kenya": "+254", "Armenia": "+374", "Macao": "+853", "Gibraltar": "+350", "Chile": "+56", "Turkey": "+90", "Afghanistan": "+93", "Bangladesh": "+880", "Mauritania": "+222", "Solomon Islands": "+677", "San Marino": "+378", "Rwanda": "+250", "French Polynesia": "+689", "France": "+33", "Peru": "+51", "Laos": "+856", "Latvia": "+371", "Mongolia": "+976", "Nauru": "+674", "Cook Islands": "+682", "Benin": "+229", "Cuba": "+53", "Korea, Republic of": "+82", "Macedonia, the former Yugoslav Republic of": "+389", "Falkland Islands (Malvinas)": "+500", "Brazil": "+55", "Malawi": "+265", "Easter Island": "+56", "St. Pierre & Miquelon": "+508", "Saint Helena": "+290", "Ukraine": "+380", "Slovenia": "+386", "Indonesia": "+62", "Libyan Arab Jamahiriya": "+218", "Kuwait": "+965", "Finland": "+358", "Central African Republic": "+236", "Mauritius": "+230", "Ascension": "+247", "Liechtenstein": "+423", "Viet Nam": "+84", "Wake Island": "+808", "Sweden": "+46", "Vatican City State": "+39", "Russian Federation": "+7", "Bulgaria": "+359", "Romania": "+40", "Italy": "+39", "Portugal": "+351", "South Africa": "+27", "Tokelau": "+690", "Bolivia": "+591", "Brunei Darussalam": "+673", "Qatar": "+974", "El Salvador": "+503", "Austria": "+43", "Mozambique": "+258", "Uganda": "+256", "Kyrgyzstan": "+996", "Niger": "+227", "Guinea-Bissau": "+245", "Angola": "+244", "Netherlands": "+31", "Chad": "+235", "Faroe Islands": "+298", "Guinea": "+224", "Panama": "+507", "Costa Rica": "+506", "Luxembourg": "+352", "Ireland": "+353", "Nigeria": "+234", "Czech Republic": "+420", "Belarus": "+375", "Iran, Islamic Republic of": "+98", "Algeria": "+213", "Australian External Territories": "+672", "Tuvalu": "+688", "Andorra": "+376", "Marshall Islands": "+692", "Botswana": "+267", "Belgium": "+32", "Thailand": "+66", "Belize": "+501", "Hong Kong": "+852", "Sierra Leone": "+232", "Georgia": "+995", "South Georgia and the South Sandwich Islands": "+500", "Gambia": "+220", "Philippines": "+63", "Tajikistan": "+992", "Morocco": "+212", "Croatia": "+385", "Cocos (Keeling) Islands": "+61", "Namibia": "+264", "Guatemala": "+502", "Cape Verde": "+238", "Iraq": "+964", "Lithuania": "+370", "Estonia": "+372", "Uruguay": "+598", "Mexico": "+52", "Lebanon": "+961", "Uzbekistan": "+998", "Tunisia": "+216", "Djibouti": "+253", "Burundi": "+257", "Taiwan, Province of China": "+886", "Cyprus": "+357", "Madagascar": "+261", "Palau": "+680", "Curacao": "+599", "Bhutan": "+975", "Sudan": "+249", "Ghana": "+233", "Fiji": "+679", "Vanuatu": "+678", "Malta": "+356", "Maldives": "+960", "Greenland": "+299", "Venezuela, Bolivarian Republic of": "+58", "Côte d'Ivoire": "+225", "Netherlands Antilles": "+599", "Tonga": "+676", "United Kingdom": "+44", "Ecuador": "+593", "Oman": "+968", "Malaysia": "+60", "Iceland": "+354", "Papua New Guinea": "+675", "Palestinian Territory, Occupied": "+970", "Germany": "+49", "Congo, Democratic Republic of the": "+243", "Diego Garcia": "+246", "Kazakhstan": "+7", "Poland": "+48", "Zambia ": "+260", "Eritrea": "+291", "Israel": "+972", "New Caledonia": "+687", "Timor-Leste": "+670", "Sri Lanka": "+94", "Japan": "+81", "Colombia": "+57", "Australia": "+61", "Sao Tome and Principe": "+239", "Guyana": "+592", "Zimbabwe ": "+263", "Syrian Arab Republic": "+963", "Guadeloupe": "+590", "Seychelles": "+248", "Gabon": "+241", "Honduras": "+504", "Myanmar": "+95", "Equatorial Guinea": "+240", "Egypt": "+20", "Nicaragua": "+505", "Singapore": "+65", "Serbia": "+381", "Moldova, Republic of": "+373", "Antarctica": "+672", "Congo": "+242", "Paraguay": "+595", "China": "+86", "Kiribati": "+686", "Comoros": "+269", "Zanzibar": "+255", "Åland Islands": "+358", "Zambia": "+260", "Zimbabwe": "+263", "Western Sahara": "358", "Wallis and Futuna": "+681", "Virgin Islands, U.S.": "+1-340", "Virgin Islands, British": "+1-284", "Svalbard and Jan Mayen": "+47", "Somalia": "+252", "Senegal": "+221", "Saint Vincent and the Grenadines": "+1-784", "Saint Pierre and Miquelon": "+508", "Saint Martin (French part)": "+590", "Saint Lucia": "+1-758", "Saint Kitts and Nevis": "+1-869", "Saint Barthélemy": "+590", "Puerto Rico": "+1", "Pitcairn": "+64", "Northern Mariana Islands": "+1-670", "Montserrat": "+1-664", "Lao People's Democratic Republic": "+856", "Jersey": "+44-1534", "Jamaica": "+1-876", "Isle of Man": "+44", "Haiti": "+509", "Guernsey": "+44", "Guam": "+1-671", "Grenada": "+1-473", "Dominican Republic": "+1", "Dominica": "+1-767", "Cayman Islands": "+1-345", "British Indian Ocean Territory": "+246", "Bermuda": "+1-441", "Barbados": "+1-246", "Bahamas": "+1-242", "Antigua and Barbuda": "+1-268", "Anguilla": "+1-264", "American Samoa": "+1-684", "Samoa": "+685"}