telephone number for carfax
1 Address: Carfax, Inc. 5860 Trinity Pkwy. 2  Ste. 600 Centreville, VA 20120. 3  Phone Number: Callers can reach the Carfax headquarters at 1-703-934-2664. 4  Fax Number: Dealers and vehicle owners can fax documents to 1-703-691-2861.