The phone code 64 at the beginning of the phone number +64 (subscriber’s phone) means that you are being called from New Zealand or you are calling a subscriber registered in New Zealand.
+64 — New Zealand
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Telephone Code +64 — what country it is
The international phone code +64 officially belongs to New Zealand, so all phone numbers that start with these numbers refer to this country.
It means that you must enter “64″ after the “+” sign to call to New Zealand. Then the next digits of the phone number can be entered.
Whose country code is +64?
+64 is the beginning of a phone number which can belong to any subscriber who purchased a SIM card in New Zealand. 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.