"Every phone number has an area code." Is the falsehood of the above statement sufficiently evident? I don't see it listed explicitly. In Hong Kong, for exampl

"Every phone number has an area code." Is the falsehood of the above statement sufficiently evident? I don't see it listed explicitly. In Hong Kong, for example, phone numbers are just 8 digits (+852 1234 5678). Some websites/apps insist on an area code, forcing one to arbitrarily split the number.