411 REFERENCE · Wikibooks
Arithmetic/Reading Serial Numbers, Account Numbers, et cetera
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Numbers such as serial numbers, account numbers, U.S. Social Security numbers, telephone numbers, ZIP codes, and other numbers that are non-sequential are read one digit at a time. Some people read two or three digits at a time.