To dial from the United States to anywhere outside North America (telephone country code +1, including Canada and 18 Caribbean and nearby islands), dial:
011 + country code + city code (if applicable) + number + #
(If you are calling on a landline, pressing # at the end will tell the telephone switch not to wait for any more digits.)
Alternatively, on a GSM cellphone, or some other kinds of cellphones, you can dial in international format, beginning with the plus symbol and the country code.
Telephone numbers in Singapore are in country code +65, and most numbers have 8 further digits.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
To dial Singapore from the US, first dial the international access code (011), then the country code for Singapore (65), followed by the local phone number in Singapore.
To dial out of the US, first dial the international access code (usually 011), then the country code of the country you are calling, followed by the area code and phone number.
To dial out of the US, first dial the international access code (usually 011), then the country code of the country you are calling, followed by the area code and phone number.
To call Singapore from the US, dial the international access code (011), followed by the country code for Singapore (65), and then the phone number you wish to reach.
To call Singapore from the US, dial the international access code (011), followed by Singapore's country code (65), and then the local phone number in Singapore.
To dial outside the US, first dial the international access code (usually "011" in the US), then the country code of the country you are calling, followed by the local phone number.
To dial outside of the US, you typically need to dial the international dialing code (usually "011"), followed by the country code of the country you are calling, and then the local phone number.
1 is the country code of the US. If you are outside of the US, you must dial 1 before any number to reach any number within the US. Every country has a different country code that you add to the beginning of a number in that country to dial a number in that country.
To dial China from the US, first dial the international access code (011), then the country code for China (86), followed by the area code and phone number.
To dial China from the US, first dial the international access code (011), then the country code for China (86), followed by the area code and phone number.
To dial from the US to Australia, you need to first dial the international dialing code, which is 011. Then, dial the country code for Australia, which is 61. Finally, dial the area code and phone number you wish to reach in Australia.
To dial out to Australia from the US, you need to first dial the international dialing code "011" followed by the country code for Australia which is "61." Then, dial the area code and phone number you wish to reach in Australia.