In New York, if you have trouble getting a taxi from 212-666-6666, you can also try 212-777-7777 which is a different taxi company.
No, no, you read it fine. It’s just that the article errs quite consistent by saying “area code” where it should be saying “exchange code” or “central office code” or even “prefix”. The three parts of a ten-digit North American phone number are the area code (first three digits), the “exchange code” (middle three digits), and the “line number” (last four digits).