Just 1 followup to this :
they MAY or MAYNOT have records in the following tables :
contact_address,contact_phone
There may also be multiple records in that table w/ the same account_id -
but the domain_type_id will be different.
so the contact_phone could have 2 records :
account_id 1, domain PRIMARY phone 555-1212
account_id 1, domain SECONDARY phone -123-4556