UPS, FedEx, and USPS Tracking Numbers: How to Tell Them Apart

Every part you order comes with a tracking number. The problem is they all look different, and when you've got numbers from three suppliers sitting in your inbox, it's easy to lose track of which carrier is bringing what.

Here's a quick way to know the carrier just by looking at the number.

How to identify each carrier at a glance

UPS starts with the letters "1Z" and is 18 characters long. Example: 1Z999AA10123456784. If you see "1Z" at the front, it's UPS, no question.

FedEx is usually 12 digits, sometimes 15, and occasionally 20 — all numbers, no letters. They look like a long string of digits with nothing else.

USPS is the longest, usually 20 to 22 digits, and often starts with 92, 93, or 94. International USPS packages can also start with two letters and end in "US" (like EA123456789US).

DHL is less common for parts, but when it shows up it's usually 10 digits.

Why this matters on the job

When a part is late, the first thing you do is check the tracking. If you can spot the carrier instantly, you go straight to the right site instead of pasting the number into all three and waiting. Over a week of orders, that adds up.

The bigger habit worth building is keeping every tracking number in one place tied to the job it belongs to — not scattered across emails, texts, and sticky notes. That's where most "where's that part?" headaches come from, not from the numbers themselves.

Tools that read the number, figure out the carrier for you, and tie it to the job take this off your plate entirely. If you want the full setup, see how to set up automated parts tracking. But even a simple shared sheet beats hunting through your inbox.

FAQ

What does a UPS tracking number look like? A UPS tracking number starts with "1Z" followed by 16 characters, 18 in total — for example 1Z999AA10123456784.

How do I know if a tracking number is FedEx or USPS? FedEx numbers are all digits, usually 12 or 15 long. USPS numbers are longer, typically 20 to 22 digits, and often begin with 92, 93, or 94.

Why do my appliance parts ship on different carriers? Suppliers like Marcone, Reliable Parts, and PartSelect each pick their own carrier based on warehouse location and cost, so a single repair can involve parts arriving on UPS, FedEx, and USPS at the same time.