What Does A USPS Tracking Number Look Like? Solved (2024)

Custom Image - How to Identify USPS Tracking Numbers

Whenever you have packages sent or delivered via USPS, it comes with a unique tracking number.

But what does a USPS tracking number look like? Here’s exactly how to read it and what it means.

What A USPS Tracking Number Looks Like

USPS tracking numbers come in different formats depending on their mail classes. The main thing you have to learn how to interpret is its different formats.

Here’s what USPS tracking numbers look like:

  • USPS Tracking: 9400 1000 0000 0000 0000 00
  • Priority Mail: 9205 5000 0000 0000 0000 00
  • Certified Mail: 9589 0000 0000 0000 0000 00
  • Collect on Delivery: 9303 3000 0000 0000 0000 00
  • Global Express Guaranteed: 82 000 000 00
  • Priority Mail Express: 9270 1000 0000 0000 0000 00
  • Priority Mail International: CP 000 000 000 US
  • Registered Mail: 9208 8000 0000 0000 0000 00
  • Signature Confirmation: 9202 1000 0000 0000 0000 00

How To Track a USPS International Package

Possible Formats Of A USPS Tracking Number

All Numbers

When you observe the numbers we have listed for you above, you will notice that some numbers have 20 to 22 digits. This indicates that the package is being mailed within the
United States.

Lesser known formats, such as those with only ten digits, also exist.


The package is being mailed overseas if you see a USPS tracking number with letters in front, like EC or CP (or, in the above example, under Priority Mail International). [1]

Other alpha-numeric USPS tracking number formats also exist. This includes a combination of 13 alpha-numeric numbers, usually starting with two letters, nine numbers, and ending
with US (i.e., EA 999 999 999 US).

How Many Numbers Does It Have?

The most common USPS tracking number formats have 20 to 22 numbers.

On the other hand, alpha-numeric tracking number formats also exist, especially in packages coming from overseas.

Other less common USPS tracking number formats have only ten digits or a 13-digit alpha-numeric tracking number that starts with two letters, nine digits and ends with US.

Understanding The First Four Digits

The first four numbers in a USPS tracking number reveal the type of mail service the package is using. These numbers are otherwise known as the service code.

For example, tracking numbers that begin with 9400 denote that it is the classic USPS tracking code, and those starting with 9270 mean that it is from a Priority Mail Express.

How To Track A Package Without A USPS Tracking Number

Frequently Asked Questions (FAQs) about USPS Tracking Numbers

What do all the USPS tracking numbers start with?

All USPS tracking numbers start with the number 9. However, it might be slightly different for international packages, as they start with letters (EC or CP) instead.

What USPS service has the longest tracking number?

Most USPS services have tracking numbers containing 20 to 22 digits, other than international packages that are alpha-numeric codes instead that start with letters. Twenty to twenty-two-digit tracking numbers are the longest in the system.

For more tips visit Route4Me Route Planner.

Key Takeaways

USPS tracking numbers often come in the form of 20 to 22-digit codes that start with the number 9.

Of course, this is not the case for all packages, as those shipped overseas will have an alpha-numeric code instead.

The first four digits in your USPS tracking number also tell you everything you need to know about your package, as the first four digits denote the type of service used.

About author: Dominic Walker

Dominic Walker works as a content marketer as part of Route4Me’s worldwide remote workforce. A teacher of over 15 years, Dom knows how to break complex ideas down to the very basics and explain them in a digestible way. He loves answering questions, so if you’re wondering about route optimization, jazz guitar, or how to land a fat bass, Dom is your guy.


About Route4Me

Route4Me has over 40,000 customers globally. Route4Me's Android and iPhone mobile apps have been downloaded over 2 million times since 2009. Extremely easy-to-use, Route4Me's apps create optimized routes, synchronize routes to mobile devices, enable communication with drivers and customers, offer turn-by-turn directions, delivery confirmation, and more. Behind the scenes, Route4Me's operational optimization platform combines high-performance algorithms with data science, machine learning, and big data to plan, optimize, and analyze routes of almost any size in real-time.