+621 Country Code
What country is the area code +621?
The country code +621 does not exist. However, it should be noted that there is currently no country that uses this country code, but the beginning of the prefix matches that of Indonesia (+62).
For this reason, any call received from a number with the country area code +621 will be interpreted as originating from Indonesia.
At the same time, it should be noted that international prefixes can start with 00 or with the "+" symbol and then the phone number of the cell phone you want to call. Both are the same, so if you receive a call from a phone starting with the country code +621 or 00621 it is probably a call from Indonesia.
When should the +621 country code be used?
As mentioned above, the +621 is not a international area code as such, it is only +62, the number below being the beginning of an area code or the beginning of a phone number located in Indonesia.
So to call Indonesia you should use the country code +62 and then add the corresponding area code (if necessary) and the phone number you wish to call.
It is important to remember that all calls from a foreign country to another country will have a higher cost than calls made in the same country. The final cost of the call will be defined by the telephone company with which the call is made.