There are 244 countries with time zones. All added one by one. And it has been checked and approved.

Please don't hesitate to ask for a change if you notice incorrect information.

• Checked timezones here https://www.php.net/manual/en/timezones.php and https://www.localeplanet.com/icu/en-KY/timezone.html
• Checked countries code here https://www.iban.com/country-codes
• Checked phone codes here https://en.wikipedia.org/wiki/List_of_country_calling_codes
• Checked locale codes here https://www.localeplanet.com/icu/
• And https://www.iso.org/obp/ui/#iso:pub:PUB500001:en for confirming some specifics data

JSON is validated and it passed all the validations. You can verify this yourself.

• https://www.toptal.com/developers/json-formatter
• https://jsonformatter.curiousconcept.com
• https://jsonlint.com/
• https://codebeautify.org/jsonvalidator

Please don't forget to say thank you by giving a star :) It takes long time to collect and confirm all these data and make them one piece as a JSON which could be quite important for your projects need.