Introduction
A known traveler number (KTN) is a nine-digit code that is issued by the Transportation Security Administration (TSA). It is used to identify travelers who have undergone additional security screening and have been approved for expedited airport security clearance. This number is valid for five years from the date of issuance, but understanding when it expires can be confusing. In this article, we will explore the expiration date of known traveler numbers, as well as how to tell when it’s set to expire and what to do when it does.
Exploring the Expiration Date of Known Traveler Numbers
The expiration date of a known traveler number is determined by the issuing agency, which is typically the TSA or Global Entry. The expiration date is usually five years from the date of issuance, but this can vary depending on the type of program and the issuing agency. For example, the TSA Precheck program has an expiration date of five years, while the Global Entry program has an expiration date of four years.
How Long Does a Known Traveler Number Last?
The length of time that a known traveler number is valid depends on the type of program and the issuing agency. Most programs have an expiration date of five years, although some are shorter or longer. For example, the TSA Precheck program has an expiration date of five years, while the Global Entry program has an expiration date of four years. The exact expiration date of your known traveler number can be found on the documentation that was provided when you applied for the program.
Factors That Impact the Expiration Date
The expiration date of a known traveler number can be affected by several factors, including the type of program and the issuing agency. Additionally, some programs may require periodic recertification, which can extend the life of the known traveler number. For example, the TSA Precheck program requires travelers to re-enroll every five years in order to keep their known traveler number active.
How to Tell When Your Known Traveler Number is Set to Expire
Knowing when your known traveler number is set to expire is important in order to ensure that you can continue to enjoy the benefits of the program. There are a few different ways to tell when your known traveler number is set to expire.
Checking with the Issuing Agency
The best way to find out when your known traveler number is set to expire is to check with the issuing agency. You can contact the agency directly or visit their website to view the expiration date of your known traveler number. Additionally, some agencies may send out notifications when your known traveler number is set to expire.
Looking at Your Travel Documents
Another way to determine when your known traveler number is set to expire is to look at your travel documents. The expiration date should be listed on the documentation that was provided when you applied for the program. Additionally, some airlines may include the expiration date on your boarding pass or other travel documents.
Contacting Your Airline
If you are unable to find the expiration date of your known traveler number on your travel documents, you can also contact your airline. Airlines are required to keep track of the expiration dates of known traveler numbers, and they may be able to provide you with the information you need.

Knowing When Your Known Traveler Number Must Be Renewed
Once you know when your known traveler number is set to expire, it’s important to take action to ensure that it is renewed before the expiration date. There are a few different ways to make sure that your known traveler number is renewed on time.
Signing Up for Notifications
Many issuing agencies offer notification services that will alert you when your known traveler number is set to expire. This allows you to stay up-to-date on the status of your known traveler number and take action to renew it before it expires.
Setting Reminders
If you don’t want to sign up for notifications, you can also set reminders for yourself to remind you when your known traveler number is set to expire. This can be done through a calendar app, to-do list app, or even a simple reminder on your phone.

A Guide to Understanding the Life Span of Known Traveler Numbers
Knowing the expiration date of your known traveler number is just the first step. It’s also important to understand what happens after your known traveler number expires and what the benefits are of renewing it. Here’s a guide to understanding the life span of known traveler numbers.
What to Expect After Renewal
Once your known traveler number has been renewed, you can expect to continue to enjoy the benefits of the program. You will still be able to use your known traveler number to access expedited airport security clearance and other perks associated with the program.
Benefits of Renewing Your Known Traveler Number
Renewing your known traveler number on time can help you save time and money. By renewing your known traveler number before it expires, you can avoid any delays or fees associated with having an expired known traveler number. Additionally, some programs may require periodic recertification, so renewing your known traveler number on time can help you maintain your eligibility for the program.

The Surprising Facts About the Shelf Life of Known Traveler Numbers
While most people know that known traveler numbers have an expiration date, there are some surprising facts about the shelf life of these numbers that many people don’t know. Here are some of the most common misconceptions about known traveler numbers, as well as some unexpected consequences of not renewing them.
Common Misconceptions About Known Traveler Numbers
Many people mistakenly believe that known traveler numbers never expire, or that they are only valid for a certain period of time. However, this is not true. All known traveler numbers have an expiration date, and it is important to understand when yours is set to expire in order to maintain the benefits of the program.
Unexpected Consequences of Not Renewing
Failing to renew your known traveler number before it expires can have unexpected consequences. If your known traveler number is expired, you may not be able to access expedited airport security clearance, and you may be subject to additional fees or penalties. Additionally, if you are enrolled in a program that requires periodic recertification, failing to renew your known traveler number on time may result in the loss of your eligibility for the program.
Conclusion
In conclusion, understanding when your known traveler number is set to expire is essential in order to maintain the benefits of the program. Knowing the expiration date of your known traveler number is the first step, and there are a few different ways to determine when it is set to expire. Additionally, it’s important to take action to ensure that your known traveler number is renewed on time in order to avoid any unexpected consequences. With this comprehensive guide, you now have all the information you need to manage the expiration date of your known traveler number.
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