The phone code 44 at the beginning of the phone number +44 (subscriber’s phone) means that you are being called from United Kingdom or you are calling a subscriber registered in United Kingdom.
+44 — United Kingdom
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Telephone Code +44 — what country it is
The international phone code +44 officially belongs to United Kingdom, so all phone numbers that start with these numbers refer to this country.
It means that you must enter “44″ after the “+” sign to call to United Kingdom. Then the next digits of the phone number can be entered.
Whose country code is +44?
+44 is the beginning of a phone number which can belong to any subscriber who purchased a SIM card in United Kingdom. It does not mean that a subscriber is definitely there at the time of the call (since he or she can make a call in roaming), but there is such a possibility.