What TSA PreCheck Is and How It Works
TSA PreCheck is a trusted traveler program run by the Transportation Security Administration, a division of the U.S. Department of Homeland Security. The program allows certain travelers to move through airport security checkpoints more quickly by using dedicated security lanes. Instead of following standard screening procedures, TSA PreCheck members can keep their shoes, belts, and light jackets on. They can also leave laptops and compliant liquids in their carry-on bags during the screening process.
How to Change Your Address With USPS →
The program started in 2011 as a way to reduce wait times at major U.S. airports while maintaining security standards. Today, TSA PreCheck operates at over 200 U.S. airports and covers more than 99 percent of all commercial airline passengers. The program has screened millions of travelers since its launch. TSA PreCheck members still go through security screening—they simply experience a streamlined version of the process.
To participate in TSA PreCheck, individuals must complete an in-person appointment at an approved enrollment center, pass a background check, and pay a program fee. Once enrolled, members receive a Known Traveler Number (KTN), which is the unique identifier needed to access TSA PreCheck benefits. This number must be provided when booking flights to activate PreCheck security lanes for that specific trip.
TSA PreCheck membership typically lasts five years. After that period, members must renew their enrollment to continue using the program. The renewal process is similar to initial enrollment but may cost less than the first-time fee.
Practical takeaway: TSA PreCheck is a paid membership program that provides faster airport security screening, not a free government benefit. You need a valid membership and must enter your KTN when booking flights to use the service.
Understanding Your TSA PreCheck Number
Your TSA PreCheck number is called a Known Traveler Number, or KTN. This is a unique nine-character code assigned to you when you complete your enrollment and background check. Your KTN is what the TSA uses to identify you as a PreCheck member and grant you access to expedited security lanes at participating airports.
Learn What to Expect at Roswell Georgia DMV →
The KTN serves as your official identifier within the TSA PreCheck system. When you provide this number to an airline during flight booking, the airline adds it to your reservation. This tells airport security staff that you are a verified PreCheck member. At the security checkpoint, TSA officers scan your boarding pass and see your KTN in the system, which directs you to the PreCheck lane.
Your KTN appears on several documents you receive during enrollment. It will be printed on your TSA PreCheck approval letter, which you receive in the mail after passing your background check. Some people also receive a TSA PreCheck card or membership card showing their KTN, though this card is not required to use PreCheck benefits. The approval letter serves as your official proof of membership.
It is important to keep your KTN in a safe place and memorize it or save it in a notes app on your phone. You will need it every time you book a flight. Some travelers write it down in their travel documents or store it in their airline loyalty account, where many programs allow you to save your TSA PreCheck number for future bookings.
Your KTN is personal to you and should not be shared with others. However, family members who are enrolled in TSA PreCheck will each have their own unique KTN.
Practical takeaway: Your KTN is a nine-character code that identifies you as a TSA PreCheck member. You must enter it when booking flights to access PreCheck security lanes, and you should save it in a secure location for future reference.
Ways to Find Your TSA PreCheck Number
If you have already completed your TSA PreCheck enrollment, your KTN is available through several reliable sources. The most official source is your TSA PreCheck approval letter, which is mailed to you after your background check is completed and approved. This letter contains your KTN and details about your membership, including your enrollment date and expiration date. If you still have this letter, you can find your number printed clearly on it.
Understanding DMV Score Sheets and Their Purpose →
You can also retrieve your KTN through the official TSA PreCheck website at tsa.gov/precheck. The website has a login portal where existing members can access their account information. To use this portal, you will need to enter personal information such as your name, date of birth, and the email address you used when you enrolled. Once you log in, your KTN will be displayed in your account dashboard along with your membership status and expiration date.
If you enrolled through one of the TSA PreCheck enrollment centers or a partner program (such as Global Entry, Nexus, or SENTRI), you may also be able to retrieve your number through that program's website or mobile app. For example, Global Entry members can find their KTN through the Trusted Traveler Program portal at goes.cbp.dhs.gov. These partner programs are run by U.S. Customs and Border Protection but include TSA PreCheck as a benefit.
Your airline's website or mobile app may also display your TSA PreCheck number if you have previously added it to your frequent flyer or travel profile. Many airlines save this information automatically, making it easy to reference on future bookings. You can log into your airline account and check your profile settings to see if your KTN is already stored there.
If you cannot locate your approval letter and do not remember your email address, you can contact the TSA directly. The TSA PreCheck customer service line can provide information about your membership status, though they may ask for identifying information to confirm your identity before sharing your KTN.
Practical takeaway: You can find your TSA PreCheck number through your approval letter, the TSA website login portal, partner program websites, your airline profile, or by contacting TSA customer service. Keep your number accessible since you will need it regularly for flight bookings.
What to Do If You Cannot Locate Your Number
Losing track of your TSA PreCheck number is common, especially if you do not travel frequently. If you cannot find your KTN through the methods described above, there are steps you can take to recover it. First, check your email inbox for correspondence from the TSA. When your enrollment is approved, the TSA typically sends a confirmation email that may include your KTN or direct you to retrieve it through the online portal.
Free Guide to Trending Sweater Colors This Winter →
If you cannot find your approval letter and your email search is unsuccessful, you can visit the TSA PreCheck website directly. The online account portal allows you to search for your membership information by entering your full name, date of birth, and the email address associated with your enrollment. This search function can locate your account even if you have misplaced your paperwork.
You should contact the TSA PreCheck customer service team if you need additional help. The TSA PreCheck Help Center provides contact information through the official tsa.gov website. You can reach customer service by phone, email, or through the website's contact form. When you contact them, have your identification ready, as they will need to verify your identity before sharing your personal membership information. They may ask for your full legal name, date of birth, and other details that match your enrollment records.
Another option is to visit your nearest TSA PreCheck enrollment center in person. Staff members at these centers can look up your account using your identification and provide you with your KTN. Many enrollment centers are located at or near major airports and some are located at travel facilities in shopping areas or office buildings. You can find a center near you through the TSA website's enrollment center locator.
Do not provide your KTN or personal information to third-party websites or services claiming to help you retrieve it. Only use official government sources like tsa.gov or contact TSA directly. Scams targeting travelers do exist, so verify you are using a legitimate source before sharing any information.
Practical takeaway: If you lose your TSA PreCheck number, check your email and the official TSA website portal first. If those options do not work, contact TSA customer service directly or visit an enrollment center in person.
Using Your TSA PreCheck Number for Flight Bookings
Once you have located your TSA PreCheck number, you need to enter it when booking your flights to activate your PreCheck benefits. Most major airlines provide a field during the online booking process where you can add your KTN. This field