Dialing telephone calls from Singapore to Portugal
001
▶ 351
▶ city code
▶ local number
Step-by-step
001
▼ This IDD (International Direct Dial) prefix tells the phone system in Singapore that you are dialing an international number.
351
▼ Country code for Portugal.
city code
▼ local number
Notes
Not sure what time it is on the other end of the line? Look here for Portugal time, date, and time zone information.
If you are calling from a hotel or office phone system, additional steps may be required.