What is a +1 phone number?

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Tags

1. #numbers
2. #three
3. #follow
4. #format
5. #prefix
6. #office
7. #telephone
8. #represented
9. #length
10. #followed
11. #canada
12. #country
13. #trunk
14. #station
15. #fixed
16. #which
17. #digit
18. #system
19. #consisting
20. #central
21. #exchange