So, because Kaiser has an enterprise telephone system any persons who are dialing out from inside the network anywhere in the country may appear to be from that number.

Kaiser. Oakland area code but our doctor is in Vacaville.

This is a call from a Kaiser facility.  It a roll over #, so that you can't call the caller back.  This person must have been making some follow-up call or contact regarding a visit or if you know someone who works there.  Usually you can not call the number that displays on the phone because they don't want that particular phone to receive calls that are supposed to go through the call center or the exclusive # that belongs to that location.

i want to know were is thece kaiser is located.

send me the direction from kaiser