Where to Find Your SunPass Transponder Number in 2026

Your SunPass transponder number is a 13-digit code printed directly on your device. For account login and management, you only need the first 12 digits. The 13th digit is a checksum used for hardware validation and is not entered into the SunPass portal.

Not sure where to look? That depends on which type of transponder you have. This guide covers every method, from reading the physical device to pulling the number from your account online.

What Does a SunPass Transponder Number Look Like?

Before searching for your number, it helps to know exactly what you are looking for.

Your transponder number is:

• A 13-digit numeric sequence on the physical device
• Only the first 12 digits are used when logging in or registering online
• Sometimes labeled “FL ID” on certain devices
• Accompanied by a barcode on the label

Quick tip: When the SunPass portal says “Invalid Transponder Number,” it usually means you entered all 13 digits. Try removing the last digit and entering only the first 12.

Method 1: Find It on the Physical Device

The fastest way to get your transponder number is to look directly at the device. Here is where to find it based on your transponder type.

SunPass Mini (Sticker Transponder)

The SunPass Mini is a thin RFID sticker that adheres permanently to the inside of your windshield.

• The ID number is printed on the front face of the sticker
• It sits above the barcode and faces outward through the glass
• You can read it from outside the vehicle without removing anything
• Cost: $4.99 + tax

SunPass PRO (Portable Transponder)

The SunPass PRO is a portable unit that attaches to your windshield with suction cups.

• The ID is on the rear casing, the side that faces the driver
• Look for the “FL ID” prefix just above the blue SunPass logo
• You do not need to remove the device from the glass to read it
• Cost: $14.95 to $19.99 + tax
• Works with the E-ZPass network in 18+ states

SunPass Portable (Legacy Model)

If you have an older, thicker portable unit that predates the PRO, the ID is located on either:

• A white sticker on the front face of the device, or
• A recessed label on the back

Bumper Mount Transponder (Commercial and Specialty Vehicles)

Some vehicles with metallic or coated windshields use an external transponder mounted near the front license plate. On these units:

• The ID is embossed directly on the plastic casing
• Road exposure can make the number difficult to read over time
• If the number is unreadable, use the SunPass app or visit a Walk-In Center

Device Comparison at a Glance

Method 2: Check Your SunPass Online Account

If the transponder is already mounted and you cannot easily read it, your online account is the next best option. The SunPass portal stores all your hardware details in one place.

Here is how to find your number online:

1. Go to SunPass.com and log in
2. Select “Transponders and Vehicles” from the left-hand sidebar
3. Look for the “Transponder #” column in the main panel
4. Your 12-digit ID will be listed next to each registered vehicle

From this same screen, you can also check the status of your device (Active, Lost/Stolen, or Defective), see the vehicle associated with it, and review your toll transaction history.

Note: If a transponder does not appear in this list, it may not have been linked to your account correctly. Use the “Add Another Transponder” option to reconnect it using the physical ID.

Method 3: Use the SunPass Mobile App

The SunPass app gives you account access on your phone and is one of the most convenient ways to find your number while on the go.

Follow these steps in the app:

1. Open the app and log in
2. Tap “Vehicles and Transponders” from the dashboard
3. Select a specific vehicle to expand the details card
4. Your transponder ID, nickname, and current status will all appear

The 2026 version of the app also includes a “Scan to Add” feature. Point your phone’s camera at the barcode on a new transponder and the app automatically fills in the 12-digit ID for you. This removes the risk of entering the number incorrectly during setup.

Download links:

• SunPass for iOS
• SunPass for Android

Method 4: Check Your Billing Statement or Activation Email

Your transponder number appears on several documents you may already have saved.

Monthly billing statement

Every toll transaction on your SunPass account activity statement includes a “Transponder / Axle Type” column. This column shows the exact ID that triggered each charge. Statements are available as digital downloads from your account or by mail.

This is especially useful if you manage multiple transponders and need to match a specific device to a set of charges.

Activation email

When you first registered your SunPass account, a confirmation email was sent to you. That email contains your transponder ID. Search your inbox for “SunPass” and look for the original registration or activation message.

Retail receipt

If you bought your transponder at a Florida Turnpike service plaza, the ID was printed directly on the sales receipt at the time of purchase.

Method 5: Contact SunPass Customer Service

Sometimes none of the above options work, and that is perfectly fine. The SunPass Customer Service team can pull up your account and confirm your transponder number after verifying your identity.

SunPass Customer Service: 1-888-TOLL-FLA (1-888-865-5352)

Hours of operation:

To verify your identity over the phone, have the following ready:

• Full name and billing address
• Last four digits of the credit card on the account
• License plate number and state
• Answers to your security questions

Visit the SunPass Contact Us page for additional contact options.

Method 6: Visit a SunPass Walk-In Center

If you prefer to handle this in person, SunPass Walk-In Centers can verify your account and issue a replacement transponder if your original device is lost or damaged.

Full location details are listed on the SunPass Where to Purchase page.

Special Case: Integrated Toll Module (ITM) Vehicles

Some newer vehicles come with a factory-installed Integrated Toll Module, or ITM. This is a built-in transponder inside the rearview mirror, developed by Gentex and TransCore. Vehicles from Audi, Mercedes-Benz, and several other manufacturers now offer this feature.

With an ITM, there is no physical sticker or portable device to check. The ID is stored in your vehicle’s onboard computer.

Here is how to find the ITM ID:

1. Access your vehicle’s infotainment or MMI screen
2. Navigate to “Vehicle” or “Car” settings
3. Select “Settings and Services”
4. Look for “Integrated Toll Module”
5. Record the “ITM ID Number” displayed on screen

Once you have it, register the ID through the SunPass portal or through a service like Payviam for OEM-specific registration.

Transponder Not Visible? Check Your Windshield Type

Some vehicles have windshields with metallic or infrared-reflective coatings. These materials can block radio frequency signals from reaching a sticker-style transponder placed in the standard position.

If your vehicle has this type of glass, the transponder must be placed in a specific cut-out zone, usually in the black shading area behind or beside the rearview mirror. This can make the ID label difficult to see from inside the car.

Known vehicles that require special placement:

If you cannot see the number from the cabin, use the SunPass app or online portal to retrieve it digitally. The full list of vehicle-specific placement requirements is available on the SunPass Windshield Installation page.

Where to Buy SunPass and Get Your Number at Purchase

The best time to record your transponder number is the moment you buy the device. SunPass transponders are sold at thousands of retail locations across Florida.

Participating retailers include:

• Publix Super Markets
• CVS Pharmacy
• Walgreens
• AAA
• Amscot
• Navarro Discount Pharmacy
• Sedano’s Supermarkets
• Florida Turnpike Service Plazas

At purchase, your transponder number appears in three places:

1. Visible through the clear packaging window before you open the box
2. On the activation card included inside the box
3. On the sales receipt at select high-volume locations like Turnpike service plazas

Take a photo of the number right away. Doing this saves a lot of trouble later, especially if the label ever fades or the device gets damaged.

What to Do If Your Transponder Is Lost or Damaged

Florida’s heat and UV exposure can degrade transponder labels over time, especially on older sticker units. If the number is no longer readable or the device stops working, here is what to do.

Warranty coverage:

To request a replacement:

1. Log in to your SunPass account
2. Go to “Transponders and Vehicles”
3. Change the device status to “Defective”
4. Follow the prompts to order a replacement

If you cannot remember the ID of the damaged device, look it up through your vehicle association in the account portal or call customer service.

Full details are on the SunPass Warranty Information page.

Reporting a Lost or Stolen Transponder

If your transponder is lost or stolen, deactivate it immediately. A stolen ID can be used to rack up toll charges on your account.

You can deactivate it in three ways:

• Online: Change the status in “Transponders and Vehicles” on SunPass.com
• By phone: Call 1-888-TOLL-FLA
• In person: Visit any SunPass Walk-In Center

Once marked as lost or stolen, the ID is blacklisted across the entire national interoperable toll network. It cannot be reactivated. A new transponder with a new ID will be issued to your account.

SunPass Interoperability: Where Your ID Works

The SunPass PRO works beyond Florida as part of the E-ZPass Interagency Group network. Your 12-digit ID is recognized across the following states:

Southeast: Florida, Georgia, North Carolina

South and Midwest: Kansas, Oklahoma, Texas, Illinois, Indiana, Ohio

Northeast: New York, New Jersey, Pennsylvania, Maryland, Delaware, Massachusetts, New Hampshire, Maine, Rhode Island

If you are billed incorrectly on an out-of-state toll road, you will need your transponder number to file a dispute with that agency. Keep it saved somewhere accessible before long road trips.

All 6 Methods: Quick Reference Summary

Your Number Is Easier to Find Than You Think

Finding your SunPass transponder number really comes down to one question: can you see the device or not? If you can, the number is right there on the label. If you cannot, your online account or the mobile app will have it in seconds.

The one thing worth doing right now, before you need this number in a hurry, is to save it somewhere. Add it to your phone’s notes app, your password manager, or take a quick photo of the back of the device. That 30-second step today will save you a much longer search later.

For anything else, the SunPass FAQ page and the FDOT SunPass resource page are reliable starting points.

Pavithra Vinoth

Pavithra Vinoth is the founder of nytollsinfo.com, where she simplifies U.S. toll systems through expert insights and custom-built calculators. Her research-driven tools help drivers avoid costly mistakes and make smarter car decisions.