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).
Thailand international dialing 66 is followed by an area code. The Thailand area code table below shows the various city codes for Thailand. Thailand country codes are followed by these area codes. With the complete Thailand dialing code, you can make your international call.