How does the United States postal service track packages to APO and FPO addresses?

For each package that we forward to the United States Postal Service on your behalf, we are given a USPS Delivery Confirmation number. We send this tracking number to you so that you may be able to obtain information about your package from the USPS. Some APO/FPO locations are hooked into the USPS Delivery Confirmation system, others are not. Further, some APO/FPO locations are hooked in, but do not maintain tracking information. You may contact your local Postmaster for more details.