Most do not use DUNS. You will find that most use Equifax and Experian but they may or may not look at DUNS to see your rating.
For example, the Citi gas cards use Experian.
Key uses Experian.
Homey Depot MC uses DUNS and Experian.
Lowes is Equifax.
Your EIN is basically a business social security number.
Message Edited by EddieX on 09-15-2008 08:16 PM