"999 999 9999" is not a valid North American phone number, it should be 10 digits number like "999 999 9999"

The validation error contains an invalid number and does not clearify that the extension is invalid.

Comments

g1smd’s picture

g1smd commented

Yes. It is important that the example number is one that is in a valid number range, with the correct number of digits and shown in the correct format.

I'm the UK metadata editor for the Google libphonenumber project over at:
http://code.google.com/p/libphonenumber/
The xml metadata file there has number length, validation and formatting information as well as an example number for each number type in each country.