More countries than the USA use +1. Canadians may not appreciate seeing the stars and stripes instead of the noble maple leaf. See https://en.wikipedia.org/wiki

More countries than the USA use +1. Canadians may not appreciate seeing the stars and stripes instead of the noble maple leaf. See https://en.wikipedia.org/wiki/North_American_Numbering_Plan https://en.wikipedia.org/wiki/North_American_Numbering_Plan The UK uses +44. But people from England, Scotland, and Wales may have a preference for their national flag.