This article details the dialling protocol for reaching Hungarian telephone numbers from within Hungary.
Calls to international destinations are in the format 00 + country code + number.
The national trunk code 06 used inside Hungary shall not be dialed from abroad.
For example, a call to Monor (area code 29) would be made as +36 29 123 456 or (if calling from a country where the international prefix is 00) 00 36 29 123 456, where the +36 or the 0036 prefixes represent the country code of Hungary.
Certain services can be called with a short number, ignoring the above scheme.