Area Codes
Any math student knows that a seven-digit number can be permuted into 10 million phone numbers. Since California has only 35 million phone numbers in use, the whole state needs only four area codes. Right?
GEORGE VARGHESE
Los Angeles
Start your day right
Sign up for Essential California for news, features and recommendations from the L.A. Times and beyond in your inbox six days a week.
You may occasionally receive promotional content from the Los Angeles Times.
