Where to Find Your TSA PreCheck Number

Your TSA PreCheck number appears in your approval notice email, which arrives after your background check clears. Open the email from TSA and look for a nine-digit number labeled "Known Traveler Number" or "KTN" — this is your PreCheck identifier. If you cannot find the email, log into your TSA PreCheck account at universalenroll.dhs.gov using the same username and password you created during enrollment, and your number will display on your account dashboard.

The approval email typically arrives within three to five business days after you complete your in-person appointment at an enrollment center. Check your spam folder if you do not see it in your inbox. The number in that email is permanent and does not change, so save it somewhere you can access it easily before your next flight.

Key Takeaways

  • Your TSA PreCheck number is a nine-digit Known Traveler Number (KTN) that appears in your approval email from TSA.
  • You can retrieve your number anytime by logging into your account at universalenroll.dhs.gov with your enrollment username and password.
  • Enter your PreCheck number when booking flights so airlines know to assign you to a TSA PreCheck security lane.
  • Your number stays the same for the full five-year validity of your PreCheck membership and does not need to be renewed.

How to Use Your Number When Booking a Flight

When you purchase an airline ticket, enter your TSA PreCheck number in the "Known Traveler Number" field during checkout. This field appears on most airline websites and is usually found in the passenger details or frequent flyer section. If you book through a travel agent or third-party site, provide the number to them directly so they can add it to your reservation.

The airline will then flag your boarding pass with a TSA PreCheck indicator — usually a small "TSA Pre✓" logo or the letters "TSA" printed on the pass. This tells TSA officers at security that you are enrolled, and you will be directed to a dedicated PreCheck lane where you can keep shoes, belts, and light jackets on, and leave laptops and liquids in your carry-on bag.

Retrieving Your Number If You Lost It

Log into your TSA PreCheck account at universalenroll.dhs.gov and click on your enrollment record. Your nine-digit number will display when ready on the screen. You do not need to contact TSA or wait for anything — the number is always available in your account.

If you forgot your login credentials, click "Forgot Username" or "Forgot Password" on the universalenroll.dhs.gov homepage. TSA will send a reset link to the email address you used when you enrolled. Once you reset your password, you can log in and view your number right away.

What to Do If You Never Received an Approval Email

First, check your spam and junk folders — approval emails sometimes get filtered there. If the email is not there, log into universalenroll.dhs.gov to see your account status. If your status shows "Approved," your PreCheck is active and your number is in your account, even if the email went missing.

If your account status shows "Pending" or "In Review," your background check is still processing. Wait three to five business days from your in-person appointment date before contacting TSA. If your status shows "Denied" or "Conditional," you will see the reason in your account, and you may have the option to request reconsideration or reapply.

Using Your Number at the Airport

Present your boarding pass with the TSA PreCheck indicator at the security checkpoint. The TSA officer will direct you to the PreCheck lane. You do not need to show your PreCheck approval letter, membership card, or any other document — the boarding pass is all that matters. Have your ID and boarding pass ready, just as you would for standard security screening.

If your boarding pass does not show the TSA PreCheck indicator even though you entered your number when booking, tell the TSA officer at the checkpoint. They can manually verify your enrollment status in their system using your nine-digit number. This sometimes happens with older airline systems or when booking through certain third-party sites.

Your Number and International Travel

Your TSA PreCheck number works only at U.S. airports and for flights departing the United States. It does not provide any benefit at foreign airports or when entering other countries. If you travel internationally and want expedited screening in other countries, you may want to look into programs like Global Entry, which includes TSA PreCheck benefits and covers international arrivals.

When you return to the United States, your TSA PreCheck number works again at U.S. security checkpoints. Make sure to include it on your return flight booking so you get PreCheck screening on the way home.

Frequently Asked Questions

Can I use someone else's TSA PreCheck number?

No. Your TSA PreCheck number is tied to your identity and background check. Using another person's number is fraud and can result in criminal charges. Each traveler needs their own enrollment and number.

What if I book a flight and forget to enter my PreCheck number?

Contact the airline before your flight and ask them to add your Known Traveler Number to your reservation. Many airlines allow you to do this online in your booking management section. If you cannot add it before the flight, you can still tell the TSA officer at security that you are enrolled, and they can verify your status manually.

Does my TSA PreCheck number change if I renew my membership?

No. Your nine-digit number remains the same throughout your five-year membership and when you renew. You do not get a new number unless your PreCheck is denied or revoked.

Where do I enter my PreCheck number if I booked through a travel agent?

Give your nine-digit number directly to your travel agent and ask them to add it to your reservation in the Known Traveler Number field. They will enter it into the airline's system on your behalf.

Can I look up someone else's TSA PreCheck number?

No. TSA PreCheck numbers are private information tied to individual accounts. Only the person enrolled can view their own number by logging into universalenroll.dhs.gov with their username and password.