Refrence field populated in REV REC

Hi

We have the revenue recognition implemented.When we do REV REC,the reference field in the accounting document gets updated with a number.This is based on a Number range object.In number range object,there is no company code assigned.We have two company codes and the same number is triggered for both company codes in reference field during the revenue recognition and the documents related to both the company codes gets displayed while viewing the document in a specific company code.

How do i control this number range and where does it get assigned to company code in IS media config.Please advice.

Regards

Rekha