| Code | Description |
|---|---|
| AVT | Averitt |
| DBP | USPS Bound Printed Matter |
| EFC | Endicia First-Class Mail |
| EIE | Endicia Express Mail |
| EIP | Endicia Priority Mail |
| EST | Estes |
| F18 | FedEx First Overnight |
| FEE | FedEx 2Day |
| FEP | FedEx Priority Overnight |
| FES | FedEx Standard Overnight |
| FFE | FedEx Freight Economy |
| FFP | FedEx Freight Priority |
| FPS | FedEx Priority Overnight |
| FSL | FedEx SmartPost parcel select |
| FSP | FedEx 2Day |
| FSS | FedEx SmartPost parcel select |
| FST | USPS First-Class Mail |
| GRD | FedEx Ground |
| M13 | USPS Priority Mail Express |
| MF | MotorFreight |
| RDR | Roadrunner |
| REA | Read for shipping instructions |
| SDA | FedEx 2Day |
| SDN | FedEx 2Day A.M. |
| U2M | UPS 2nd Day Air A.M. |
| U60 | UPS Next Day Air Early |
| UP1 | UPS Next Day Air |
| UP2 | UPS 2nd Day Air |
| UPS | UPS Ground |
| UPX | UPS Express Saver |
| USP | USPS Priority Mail |
| WTC | Ward Trucking Corporation |
