+440 Country Code
What country is the area code +440?
The country code +440 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 United Kingdom (+44).
For this reason, any call received from a number with the country area code +440 will be interpreted as originating from United Kingdom.
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 +440 or 00440 it is probably a call from United Kingdom.
When should the +440 country code be used?
As mentioned above, the +440 is not a international area code as such, it is only +44, the number below being the beginning of an area code or the beginning of a phone number located in United Kingdom.
So to call United Kingdom you should use the country code +44 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.