Telephone country code 21 doesn’t actually belong to a specific country. It’s part of a range of codes that start with “2,” which are generally assigned to countries in Africa. However, 21 specifically isn’t used as a standalone code it’s the prefix for several countries that begin with 21, like Tunisia (+216) or Algeria (+213).
So, if you see +21, you’ll need the digits that follow to determine the exact country. Always double-check to avoid confusion it might save you from dialing the wrong number
