This from Wikipedia:
“In 1999, the North American Numbering Plan Administration allocated telephone area code 321 (as in a launch countdown) to the Cape Canaveral area in homage to its spacefaring heritage.”
So now 666 and 321 have been assigned. With the knowledge that the ubiquitous 555 fictional area code is also used for directory assistance (555-1212), I think I know all the area code trivia.