The following are the mailing addresses for the major credit bureaus. These are the addresses that you would use to send correspondence to them, such as a credit dispute.

Experian
NCAC
PO Box 9556
Allen TX 75013

Equifax Information Services
P O BOX 740256
Atlanta, GA 30374

TransUnion
Customer Disclosure Center
Trans Union Consumer Relations
PO Box 2000
Chester, PA 19022-2000

These addresses may change without notice so you are better off calling their phone number to get the latest address.

Experian
Office in TX: 1-888-397-3742
Business: 888-211-0728

Equifax Information Services
Business Line (also has option for Personal): 888-202-4025
Office in GA: 1-800-685-1111
Dispute Fax #: 888-826-0573
Business: 802-304-0364
General: 800-797-6801

TransUnion
Office in PA: 1-800-888-4213
888-259-6845 (6am-12 pacific time)
800-916-8800 (consumer relations