Free Guide to Finding Your Known Traveler Number

What Is a Known Traveler Number and Why It Matters

A Known Traveler Number (KTN) is a unique identification code that connects you to trusted traveler programs operated by the U.S. Department of Homeland Security. When you provide your KTN at airport check-in or during online booking, transportation security screeners have access to background information about you that has already been verified through a government vetting process.

The primary purpose of a KTN is to streamline your travel experience. Rather than going through standard security screening procedures that apply to all passengers, people with a KTN may go through expedited screening lanes. This can mean shorter wait times at security checkpoints, reduced need for removing shoes and belts, and a generally smoother process at the airport.

Several trusted traveler programs issue KTNs, including TSA PreCheck, Global Entry, NEXUS, and SENTRI. Each program serves different travel needs. TSA PreCheck focuses on domestic air travel within the United States. Global Entry covers international air travel. NEXUS and SENTRI address land border crossings between the United States and Canada or Mexico respectively.

As of 2024, TSA PreCheck has approximately 10 million active members. This represents a significant portion of regular air travelers. The program demonstrates that many Americans value the time savings and convenience that a KTN provides. For frequent flyers or business travelers, the benefits can add up substantially across multiple trips per year.

Understanding what a KTN is and how it works is the foundation for determining which program might be relevant to your travel patterns. Your specific travel needs—whether you fly domestically, internationally, or cross land borders—will inform which trusted traveler program and associated KTN makes sense for you.

Practical Takeaway: A KTN connects you to a trusted traveler program that may result in faster security screening. The right program depends on what type of travel you do most often.

The Major Trusted Traveler Programs That Issue KTNs

The Department of Homeland Security operates several trusted traveler programs, each with its own KTN format and associated benefits. Learning about the differences helps you understand which programs are structured for your travel situation.

TSA PreCheck is the most widely used program for domestic air travel. Members receive a Known Traveler Number that they enter when booking flights or checking in. The program costs $78 to $85 for a five-year membership. With TSA PreCheck, you can keep shoes on, keep laptops and toiletries in your carry-on bag, and proceed through dedicated security lanes at over 200 U.S. airports. Your KTN appears in a specific format that TSA agents recognize immediately.

Global Entry extends benefits to international travelers. This program costs $100 for a five-year membership and includes TSA PreCheck benefits plus expedited customs and immigration processing when you return to the United States by air. Your Global Entry KTN allows you to use automated kiosks at major U.S. airports rather than standing in traditional customs lines. The time savings can be particularly valuable if you travel internationally several times per year.

NEXUS serves frequent travelers at the U.S.-Canada border. The membership costs $120 for five years and allows expedited processing at air, land, and marine ports of entry between the United States and Canada. Your NEXUS KTN can also be used for TSA PreCheck benefits on domestic flights.

SENTRI (Secure Electronic Network for Travelers Rapid Inspection) covers land border crossings between the United States and Mexico. This program costs $122.50 for four years and allows you to use dedicated lanes at southern border ports of entry. Your SENTRI KTN also provides TSA PreCheck benefits on domestic flights.

Some programs nest within others. For example, if you have Global Entry, you automatically receive a TSA PreCheck KTN and don't need to purchase both separately. Understanding this structure prevents unnecessary spending and ensures you have the right number for each type of travel you undertake.

Practical Takeaway: Match your program choice to your travel patterns. Domestic flyers may only need TSA PreCheck, while international travelers should consider Global Entry, and border-crossing commuters should explore NEXUS or SENTRI.

How to Locate Your Known Traveler Number If You Already Have a Program

If you have previously completed a trusted traveler program, your Known Traveler Number already exists in the Department of Homeland Security database. Finding it is straightforward and requires accessing the right online portal. You do not need to create a new account or go through the vetting process again—you simply need to retrieve your existing number.

For TSA PreCheck members, the primary resource is the official TSA website at tsa.gov. Once you visit the site, look for the section labeled "TSA PreCheck" and find the option to check your membership status. You will need to provide identifying information such as your name, date of birth, and the email address associated with your membership. After entering this information, the system displays your Known Traveler Number, your membership expiration date, and other relevant details.

Global Entry members can search their information through the U.S. Customs and Border Protection (CBP) website, specifically through a resource called the "Trusted Traveler Program" portal. Visit cbp.gov and navigate to the Global Entry section. Similar to TSA PreCheck, you provide personal identifying information, and the system returns your KTN along with your membership details. This portal also shows whether your Global Entry status automatically provides TSA PreCheck benefits.

NEXUS members and SENTRI members follow a similar pattern through the CBP website, which manages both border crossing programs. The Trusted Traveler portal consolidates information for all these programs. If you have held membership in multiple programs, you can check each one through this single interface by providing your information and selecting which program you want to review.

Some people receive a physical card when they complete their trusted traveler program enrollment and interview. If you have this card, your KTN is printed on it directly. However, having the card is not necessary to locate your number—the online portals maintain complete records regardless of whether you retained the physical document.

If you cannot remember the email address you used for enrollment, you can use your passport number or other government-issued ID as an alternative identifier on most of these portals. The systems are designed to accommodate people who completed enrollment years ago and may not recall every detail of their original application.

Practical Takeaway: Check the official TSA or CBP websites using your personal information to retrieve your existing KTN. You do not need to pay fees again or re-enroll if you already completed the program.

Understanding the Enrollment Process and Timeline

For people who do not yet have a trusted traveler program, understanding the enrollment process provides realistic expectations about timing and requirements. The process involves both online submission and an in-person interview at an enrollment center. The entire process typically takes several weeks from start to finish, though the exact timeline varies by program and location.

The online portion begins on the official program website. You provide biographical information, employment history, travel patterns, and answers to background questions. This stage usually takes 15 to 30 minutes to complete. After submission, the Department of Homeland Security reviews your information and conducts initial background checks. This review phase can take anywhere from one to two weeks depending on the volume of applications being processed at that time.

Once your initial review is complete, the system sends you a notification to schedule an in-person interview at an enrollment center. These centers are located at airports and U.S. Customs and Border Protection facilities across the country. The availability of appointment slots varies by location, and during busy travel seasons, wait times for interviews can extend four to six weeks. Some enrollment centers have shorter waiting periods, so if you have flexibility in location, you might schedule an interview sooner at a center further from your home.

The in-person interview typically lasts 10 to 15 minutes. A CBP or TSA officer verifies your identity using government-issued documents, takes your biometric information (fingerprints and photograph), and conducts a brief conversation to confirm the information you submitted online. You also pay the membership fee at this time if you have not already done so online. After the interview, your background check continues in the background, and the agency issues your Known Traveler Number.