If this number was not spoofed, and you did not get a bogus telemarketer, please note that it is a legitimate Orange County CA emergency notification service that you were supposed to have signed up for through your local municipality in Orange County, CA.
I am enrolled for this service and have found that it works well for earthquake, fire, flood, and other emergencies.
Call Type, below, should have a category for 'legitimate'
Here is a partial quote from a 12/7/2007 press release (http://ocgov.com/):
Orange County Emergency Operations Center and Public Information Hotlines Activated
ORANGE COUNTY OPERATIONAL AREA - EMERGENCY OPERATIONS CENTER
... The Public Information Hotline has been staffed and is ready to accept calls of inquiry in regard to evacuations in the Canyon communities of Orange County.
The Public Information Hotline phone number is (714) 628-7085. All resources and support personnel have been identified and are on standby ready to mobilize other areas of the Emergency Operations Center when needed.
...
If you have questions please call the Orange County hotline at 714-628-7085.
If you have an emergency please call 911.
Got a call this morning from this number. It was a robocall about something. I hung up and rolled over and went back to sleep. It is the Orange Co emergy notification number.