Which carriers do you use for shipping within the US?

Our shipping software doesn't give us the choice of carrier. The system chooses the carrier, and we are notified once the label is made. Our shipments are delivered via UPS, USPS, FedEx, and in some instances via Lasership / Ontrac or ACI

Some carriers have contracts with other carriers.

UPS Surepost, FedEx Smartpost, ACI, and DHL are partnered with USPS and help transport the package to the local USPS office for final delivery this can occur for regular street addresses and home addresses.