How do you call a US 1-800 number from the UK?

To call a US 1-800 number from the UK, follow these steps:

1. Dial the exit code for the UK, which is 00.

2. Dial the country code for the United States, which is 1.

3. Dial the area code for the 1-800 number, which is always 800.

4. Dial the 7-digit phone number of the 1-800 number.

For example, to call the 1-800 number 1-800-123-4567 from the UK, you would dial 00 1 800 123 4567.