Parcels often pass through multiple carriers before reaching their final destination. Below are some of the most common logistics providers that handle last-mile or cross-border delivery. Each carrier has unique tracking number formats and status codes — and InstantParcels helps unify them into a single timeline.
USPS is the backbone of last-mile delivery in the United States. Millions of international parcels are handed to USPS after clearing customs at hubs like ISC New York or ISC Los Angeles. Tracking numbers often start with 940, 927, or use the 420 ZIP routing code.
UPS operates one of the largest global logistics networks, handling both express shipments and cross-border e-commerce parcels. Tracking numbers usually start with 1Z, followed by a 6-digit account code and package ID. UPS is known for detailed scans such as Export Scan and Import Scan, which give visibility during customs clearance.
FedEx manages millions of parcels daily across its hubs in Memphis and Indianapolis. Tracking numbers may be 12 digits, 15 digits, or 20 digits depending on the service. FedEx Express, Ground, and SmartPost (often handed to USPS) are all supported, making it one of the most versatile carriers in international trade.