For example, no one ever canceled the 329 phone lines at Martin Luther King Jr.-Harbor Hospital when it was downgraded to an outpatient clinic in August 2007.
Auditors found one line that was actually registered to a Hollywood ticket broker that is now out of business. That line cost taxpayers $38 a month for 14 years.
Auditors said they could find up to 16,000 abandoned county phone lines when their review is complete. The cost for those lines could reach $3 million a year.
The Associated Press contributed to this story.