Received robocall from 323-281-1438; a recording about free grocery certificates and a free medical alert device.  Blocked it with my call blocker device then got same call in next couple of days from 541-200-3489 and 661-774-4389.  Blocked those as well.  

AT&T should address this issue.  It's their network and their computers processing these calls.

Has called our office twice in the past 90 minutes. Sounds like they are trying to scam senior citizens. Won't take you off the list. Same pre-recorded message as the calls from from 360-633-9336, which has also called twice in the past half hour.

ATT cares not for the victim.  ATT cares only for the money.  When I had ATT service, they allowed phony 3rd party billing that doubled price of phone service.  Then they disconnect you if you do not pay.  They would not stop 3rd party billing.  They get a percentage of the 3rd party billing and they are all thieves.  ATT will not stop robocalls or fraudsters or any type of telephone service because that is how they get their money.  They sell line rental time to all phone companies.  Fraud comprises a lot of that billed time.  ATT cares not for the victim.

Caller ID read out as "CA". Didn't answer call.

The phone number came with the initials CA above it.  I don't recall getting this number before.  It is common to get a number with a state name above it.  I don't answer any of them.