Customer Care Center at (800) 522-9085 or postalone@email.usps.gov. For a convenient and fast way to order large quanties of stamps for your business, contact us at 1-800-STAMP-24 (800-782-6724) or email StampsNow.info@usps.gov.
| Carrier Tracking Information | Contact Info |
| ECMS EXPRESS | Phone: 1-855-266-9299 |
| ABF Freight System Inc. | Phone: 1-877-609-5681 |
| Australia Post | Phone: (within Australia) 13-POST-13-7678; (outside of Australia) +61-3-8847-9045 |
| CEVA Logistics | Phone: 1-800-592-7489 (6 a.m. to 5 p.m. PT) |
| DB Schenker | Phone: 1-877-280-4573 |
| TForce Final Mile | Phone: 1-855-396-2639 |
| Fidelitone | Phone: 1-844-524-6320 |
| Home Direct | Phone: 1-877-819-5771 |
| i-parcel | Phone: 1-888-472-7235 |
| Innovel Solutions | Phone: 1-888-460-5404 |
| Landmark Global | Phone: 1-519-737-9101 |
| LaserShip | Phone: 1-804-414-2590 |
| Lonestar Overnight | Phone: 1-800-800-8984 |
| Menlo Worldwide/UPS Supply Chain Solutions | Phone: 1-800-443-6379 |
| MSI | Phone: 1-519-737-9101 |
| Non Stop Delivery (NSD) | Phone: 1-844-401-9082 |
| OnTrac | Phone: 1-800-334-5000 |
| Parcel Pool | Phone: 1-877-727-2354 |
| Pilot | Phone: 1-877-549-0160 |
| Prestige | Phone: 1-877-778-0942 |
| Schneider/Watkins Shepard | Phone: 1-866-219-5973 |
| Watkins | Phone: 1-866-219-5973 |
| WnDirect | Phone: 1-516-254-4540 (4:00 a.m. to 6:30 p.m. EST) |
| XPO Logistics | Phone: 1-844-285-5279 |
| Zenith | Phone: 828-469-1095 |
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