Where to find your TSA PreCheck number

Your TSA PreCheck number is printed on your Known Traveler Number (KTN) card, which TSA mails to you after you complete your in-person appointment and background check. The nine-digit number appears on the front of the card in the upper right corner. If you have the physical card, that is the fastest way to locate it.

If you cannot find your card, you can retrieve the number through the TSA's official website or by contacting TSA directly. The number does not change once it is issued, so you only need to find it once — you will use the same number for every flight and trusted traveler program renewal.

Key Takeaways

  • Your TSA PreCheck number is a nine-digit code printed on the front of your Known Traveler Number card in the upper right corner.
  • You can look up your number on the TSA's official website by entering your name, date of birth, and the email address you used when you enrolled.
  • If you do not remember your enrollment email, you can call the TSA at 1-855-347-8371 to verify your identity and retrieve your number over the phone.
  • Your number remains the same for the five-year validity period of your PreCheck membership and does not need to be renewed each year.

Retrieving your number through the TSA website

Go to the official TSA PreCheck website at tsa.gov/precheck. Look for the option to retrieve your Known Traveler Number. You will be asked to enter your full name, date of birth, and the email address associated with your enrollment account.

After you submit this information, TSA will display your nine-digit number on the screen. Write it down or take a screenshot, since you will need it when you book flights or renew your membership. This method works whether your card is lost, damaged, or straightforward misplaced at home.

Calling TSA customer service

If you prefer to retrieve your number by phone, call the TSA PreCheck customer service line at 1-855-347-8371. The line is open Monday through Friday, 8 a.m. to 10 p.m. Eastern time, and Saturday and Sunday, 9 a.m. to 8 p.m. Eastern time.

Have your name, date of birth, and the email address you used during enrollment ready. A representative will verify your identity and provide your nine-digit number. This is also the best option if you cannot remember the email address you enrolled with, since a representative can search your account using other identifying information.

What to do if you never received your card

TSA typically mails your Known Traveler Number card within two weeks of your in-person appointment. If more than three weeks have passed and you have not received it, contact TSA customer service at 1-855-347-8371 to confirm your mailing address and request a replacement card.

While you wait for the replacement, you can still use your TSA PreCheck benefits by providing your nine-digit number when you book your flight. Airlines and TSA agents can look up your membership using just the number, so you do not need the physical card to access PreCheck lanes at the airport.

Using your number when you book a flight

When you purchase an airline ticket online or over the phone, you will see a field for your Known Traveler Number. Enter your nine-digit TSA PreCheck number in that field. The airline will add it to your reservation, and TSA will see it when you check in at the airport.

If you forget to enter your number at booking, you can usually add it later through your airline's website or by contacting the airline directly before your flight. Some airlines also allow you to add it at the airport check-in counter, though doing so in advance is faster and more reliable.

Keeping your number safe and accessible

Store your TSA PreCheck number in a safe place where you can find it quickly before travel. Many travelers keep a photo of their card on their phone, write the number in their travel documents, or save it in a password manager. Since the number does not change during your five-year membership, you only need to locate it once.

Do not share your TSA PreCheck number with anyone except airline staff or TSA agents. The number itself is not sensitive in the way a Social Security number is, but it is personal to you and should not be posted on social media or given to third parties.

Frequently Asked Questions

Can I use my TSA PreCheck number before my card arrives?

Yes. Once your in-person appointment is complete and your background check clears, your number is active when ready. You can enter it when you book your next flight even if your physical card has not arrived yet. The airline and TSA will recognize your membership at the airport.

What if I lost my card and cannot remember my enrollment email?

Call TSA customer service at 1-855-347-8371. A representative can search for your account using your name and date of birth, then provide your number and help you request a replacement card. You do not need the email address to retrieve the number by phone.

Is my TSA PreCheck number the same as my frequent flyer number?

No. Your TSA PreCheck number is separate from any airline loyalty program number. You enter both when you book a flight — the TSA number in the Known Traveler Number field and your frequent flyer number in the airline's loyalty program field.

Do I need to retrieve my number every time I fly?

No. Once you have your nine-digit number, it stays the same for your entire five-year membership period. You only need to find it once and then enter it in your airline reservations. You do not need to retrieve it again unless you forget what it is.