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The Ultimate Guide to USPS Tracking: From Number Lookups to Informed Delivery

The ability to track packages has become an essential part of our modern lives. Whether you’re sending a birthday gift across the country or ordering a new pair of shoes online, knowing where your package is and when it will arrive is a vital part of the experience. The United States Postal Service (USPS) offers a robust tracking system that provides valuable insights into the journey of your shipments. This guide will walk you through everything you need to know about USPS tracking, from understanding tracking numbers to utilizing advanced features like Informed Delivery and package interception.

Table of Contents

Understanding USPS Tracking Numbers

USPS tracking numbers are unique identifiers assigned to each mailpiece or package processed by the USPS. These numbers allow you to track the progress of your shipment from the moment it is created to the moment it is delivered. Understanding the format and structure of these numbers is crucial for successful tracking.

1. The Format:
A typical USPS tracking number consists of a combination of letters and numbers. It can vary in length, but it generally follows a specific structure:

  • Package ID: The most common type of tracking number is the Package ID. It typically starts with a series of letters followed by a series of numbers, for example, “9400110205327090081458”.
  • Mailpiece ID: This type of tracking number is assigned to smaller mailpieces like letters and envelopes. It usually consists of a combination of letters and numbers, often starting with a letter like “U,” followed by a series of numbers.

2. Identifying a Tracking Number:
You can usually find the tracking number on the shipping label attached to your package or in the email confirmation you received after placing an order. Look for a number that stands out and includes a mix of letters and numbers. If you’re unsure, you can always contact the sender for the tracking number.

Ways to Track Your Package

USPS offers multiple ways to track your packages, providing flexibility and convenience for users.

Step-by-Step Instructions:

  • Go to the USPS website:
  • Find the “Track & Manage” section on the website.
  • Enter your tracking number in the designated field.
  • Click “Track” to view the status of your shipment.

Features and Benefits:

  • Real-Time Updates: The USPS website provides real-time updates on your package’s location and movement.
  • Delivery Notifications: You can set up email or text notifications to be alerted when your package is out for delivery or has been delivered.
  • Detailed Tracking Information: The website shows a detailed history of your package’s journey, including each scan and location update.

2. The USPS Mobile App:

App Download:

  • Search for “USPS” in your app store (Apple App Store or Google Play).
  • Download and install the app on your smartphone or tablet.

Tracking Features:

  • Open the app and log in (if required).
  • Enter your tracking number in the app’s search bar.
  • View the status and location of your package in the app interface.

Additional Benefits:

  • Easy Access: Track packages conveniently from your mobile device.
  • Push Notifications: Receive immediate notifications directly to your phone about package updates.
  • Barcode Scanning: The app allows you to scan barcodes directly from packages to track shipments.

3. Third-Party Apps and Websites:

Several third-party apps and websites offer USPS tracking functionality. These platforms often aggregate tracking information from multiple carriers, providing a single dashboard for managing shipments.

Examples of Third-Party Tools:

  • Parcel: A popular tracking app that allows you to track packages from various carriers, including USPS.
  • Trackr: Another user-friendly app that provides detailed tracking information and delivery notifications.
  • ShipStation: A comprehensive shipping and fulfillment platform that includes USPS tracking features.


  • Convenience: Track shipments from various carriers in one location.
  • Enhanced Features: Some third-party tools offer additional features like price comparisons, package insurance, and return labels.


  • Accuracy: Information may not be as accurate or up-to-date as official USPS channels.
  • Security: Third-party apps may require access to your personal information, so choose reputable providers.

Utilizing Additional Tracking Features

USPS offers additional features that can enhance your tracking experience and provide greater control over your shipments.

1. Informed Delivery:

Concept: Informed Delivery is a free service that sends you daily email notifications with digital previews of your incoming mail and packages. This allows you to anticipate what to expect before your mail arrives.


  • Convenience: Be prepared for deliveries and avoid missing important mail.
  • Security: Informed Delivery helps you monitor mail and identify potential fraudulent activity.

Sign Up:

  • Go to the USPS Informed Delivery website:
  • Create an account using your email address and other required information.
  • Select the “Sign Up for Informed Delivery” option.
  • Provide your address and confirm your subscription.

2. USPS Package Intercept:

Purpose: The USPS Package Intercept service allows you to intercept a package that is already in transit and change its delivery address, return it to the sender, or have it held at a local post office.


  1. Go to the USPS Package Intercept website:
  2. Enter the tracking number of the package you want to intercept.
  3. Select the reason for intercepting the package.
  4. Provide the new address or other instructions.
  5. Pay the associated fees for the service.
    * Note: The success of a package intercept request depends on the location and status of the package. It’s best to initiate the request as early as possible.

3. USPS Hold Mail:

Purpose: The Hold Mail service allows you to temporarily stop the delivery of your mail to your address for a specified period. This is useful for situations like vacations or when you are expecting a large package and want to avoid theft or damage.


  • Hold Mail for a Specified Period: Set a specific duration for the hold (e.g., 7 days, 14 days, etc.)
  • Hold Mail for a Specific Date Range: Set a start and end date for the hold.

Requesting Hold Mail:

  • Visit the USPS Hold Mail website:
  • Enter your address and choose the hold mail option.
  • Select the duration or date range for the hold.
  • Provide any additional information required.

Troubleshooting Common Tracking Issues

While USPS tracking is generally reliable, you may encounter some issues that require troubleshooting.

1. Tracking Number Not Found:

Possible Reasons:

  • Incorrect Tracking Number: Verify that you have entered the correct tracking number.
  • Newly Created Package: It may take some time for the USPS system to recognize new tracking numbers. Wait a few hours and try again.
  • Incorrect Package ID: The USPS system uses different identifiers for packages and mailpieces. Ensure you are using the correct tracking number format for the type of shipment.

Steps to Take:

  • Check Your Email Confirmation: Re-verify the tracking number provided in your order confirmation email.
  • Contact the Sender: Contact the sender for the correct tracking number or to inquire about the package’s status.

2. Delayed or Missing Package:

Common Causes:

  • Shipping Delays: Unexpected weather events, holidays, or increased shipping volume can cause delays.
  • Incorrect Address: Verify that the delivery address on the package is correct.
  • Undeliverable Package: The package may be undeliverable due to an invalid address or other reasons.
  • Theft or Damage: Packages can sometimes be lost or stolen during transit.

Potential Solutions:

  • Check for Updates: Track the package regularly to monitor its progress.
  • Contact the Sender: Inform the sender about the delay and request assistance.
  • File a Missing Package Claim: If the package remains missing after a reasonable timeframe, file a claim with the USPS.

3. Incorrect Tracking Information:

Possible Reasons:

  • System Errors: Tracking systems may occasionally experience technical glitches.
  • Scanning Delays: Scans may be delayed, leading to inaccurate updates.
  • Package Misrouting: Packages may be misrouted during transit.

Ways to Verify:

  • Check Multiple Sources: Use the USPS website, mobile app, and third-party tracking tools to cross-reference information.
  • Contact the Sender: Contact the sender to confirm the package’s status.
  • Report Inaccuracies: If you notice significant inaccuracies in the tracking information, contact the USPS for assistance.


  • Q: How long does it take for USPS tracking to update?
    • A: USPS tracking updates can vary depending on the package’s location and the time of day. In general, tracking information updates more frequently when packages are in transit. However, it’s not uncommon for updates to be delayed, especially in rural areas or during peak shipping seasons.
  • Q: Can I track international shipments with USPS tracking?
    • A: Yes, USPS tracking can be used to track international shipments. However, the level of tracking detail available may vary depending on the destination country and the shipping method used.
  • Q: What does “Out for Delivery” mean on USPS tracking?
    • A: “Out for Delivery” means that the package has left the USPS facility and is on its way to your address. The package is expected to be delivered within the same day.
  • Q: Is it possible to track a package without a tracking number?
    • A: Unfortunately, tracking a package without a tracking number is usually not possible. The tracking number acts as a unique identifier that allows the USPS system to locate and monitor the package’s journey.
  • Q: What happens to my package if it’s undeliverable?
    • A: If the USPS is unable to deliver your package due to an invalid address, incorrect information, or other reasons, it will typically attempt to return it to the sender. If the package cannot be returned, it may be sent to a USPS facility for storage or disposal.
  • Q: What are the different delivery statuses shown on USPS tracking?
    • A: The USPS tracking system displays various delivery statuses, including:
      • In Transit: The package is being transported to the next location.
      • Arrived at USPS Facility: The package has arrived at a USPS facility for processing or sorting.
      • Out for Delivery: The package is on its way to your address.
      • Delivered: The package has been successfully delivered to your address.
      • Attempted Delivery: The USPS attempted to deliver the package but was unable to do so.
      • Return to Sender: The package is being returned to the sender.


USPS tracking is an invaluable tool for both senders and recipients of mail and packages. By understanding the basics of tracking numbers, utilizing available tracking channels, and familiarizing yourself with additional features like Informed Delivery, you can stay informed about your shipments and ensure a smooth and hassle-free experience. Remember, the information provided in this guide is meant to be a comprehensive resource, but always consult the USPS website for the most up-to-date information and specific instructions.