Customer Master

Hello All,

when i try to enter the customer master, as the selection screen, there is it allows me to enter with no Company code field value, and so in the customer master there is no Company Code Tab, how do i find under what company code this customer was created, and also, this is only a ship to customer, where do i find a link for its sold-to customer other than the Sales area tab, because there is no assignment of partners in that tab.

regards