Since Buddhism denies the existence of a separate self, as explicated in the teachings of anatman and sunyata, self-realization is a contradictio in terminis for Buddhism.
If you are calling from other country than Thailand to the Bangkok area, dial IDD of your country, then international phone number (country code) +66, after that phone area code of Bangkok 2 and call number. +66 - 2 (Telephone number).
CountryCode.org is your complete guide to make a call from anywhere in the world, to anywhere in the world. This page details Belgium phone code. The Belgium country code 32 will allow you to call Belgium from another country. Belgium telephone code 32 is dialed after the IDD.