If Equifax Mortgage Solutions is providing you the scores to all three agencies, then they are the consumer reporting agency (CRA) you are getting the score from as they are a CRA themselves.
From the Fair Credit Reporting Act:
"(f) The term “consumer reporting agency” means any person which, for monetary fees, dues, or on a cooperative nonprofit basis, regularly engages in whole or in part in the practice of assembling or evaluating consumer credit information or other information on consumers for the purpose of furnishing consumer reports to third parties, and which uses any means or facility of interstate commerce for the purpose of preparing or furnishing consumer reports."
Adam Witmer, CRCM
All statements are my opinion, not those of my employer, and should not be taken as legal advise.