To call Portugal from the United States, you will need to dial the international dialing code for the United States, which is 011, followed by the country code for Portugal, which is 351. After dialing the country code, you will need to dial the local phone number.
Here is an example of how to call a phone number in Portugal from the United States:
Dial 011, the international dialing code for the United States
Dial 351, the country code for Portugal
Dial the local phone number (including the area code)
For example, to call a phone number in Lisbon, Portugal, you would dial 011-351-21-123-4567.
It is important to note that international calls can be expensive, so it is a good idea to check with your phone provider or use a calling card or internet-based service to make international calls.