Apparatus

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sensors Mode-S transponder

A3A8EF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N335FR · AIRBUS A-320neo · operated by WELLS FARGO TRUST CO NA TRUSTEE

Hex
A3A8EF
Octal
50724357
Decimal
10,725,615
Country
US
Tail
N335FR
Type
A20N
Transponder active on ground
Flights observed
522
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S A3A8EF.

Country allocation

The ICAO 24-bit address A3A8EF falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
FFT2291 - 6 2026-06-19
FFT4499 Frontier Airlines 5 2026-07-25
FFT1790 Frontier Airlines 5 2026-07-25
FFT1248 - 5 2026-07-03
FFT777 - 4 2026-07-04
FFT4946 Frontier Airlines 4 2026-07-21
FFT4561 - 4 2026-07-06
FFT4500 Frontier Airlines 4 2026-07-21
FFT3330 Frontier Airlines 4 2026-05-01
FFT3294 - 4 2026-07-04
FFT3293 - 4 2026-07-04
FFT3155 Frontier Airlines 4 2026-07-25
FFT3052 Frontier Airlines 4 2026-07-18
FFT3014 - 4 2026-06-18
FFT2890 Frontier Airlines 4 2026-07-20
FFT2553 - 4 2026-07-20
FFT2292 - 4 2026-06-19
FFT1524 - 4 2026-07-07
FFT1523 - 4 2026-07-08
FFT1402 Frontier Airlines 4 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT688 DEN → DCA Jul 26, 17:40 UTCJul 26, 20:35 UTC2h 55m
2026-07-26 FFT2549 DFW → DEN Jul 26, 14:30 UTCJul 26, 16:00 UTC1h 30m
2026-07-26 FFT2550 DEN → DFW Jul 26, 11:20 UTCJul 26, 12:45 UTC1h 25m
2026-07-25 FFT1790 PDX → DEN Jul 25, 19:30 UTCJul 25, 21:30 UTC2h 0m
2026-07-25 FFT1790 PDX → DEN Jul 25, 19:30 UTCJul 25, 21:29 UTC1h 59m
2026-07-25 FFT4499 BWI → ATL Jul 25, 16:35 UTCJul 25, 18:20 UTC1h 45m
2026-07-25 FFT3155 DEN → LAX Jul 25, 13:20 UTCJul 25, 15:15 UTC1h 55m
2026-07-24 FFT3565 DTW → DEN Jul 24, 17:45 UTCJul 24, 20:15 UTC2h 30m
2026-07-24 FFT3566 DEN → DTW Jul 24, 14:10 UTCJul 24, 16:25 UTC2h 15m
2026-07-24 FFT3440 SFO → DEN Jul 24, 06:50 UTCJul 24, 08:50 UTC2h 0m
2026-07-24 FFT1093 ISP → MCO Jul 24, 03:00 UTCJul 24, 05:15 UTC2h 15m
2026-07-23 FFT1597 CRP → DEN Jul 23, 21:20 UTCJul 23, 23:45 UTC2h 25m
2026-07-23 FFT1598 ORD → ATL Jul 23, 17:20 UTCJul 23, 19:25 UTC2h 5m
2026-07-23 FFT2818 SAN → DEN Jul 23, 13:38 UTCJul 23, 15:23 UTC1h 45m
2026-07-23 FFT2818 SAN → DEN Jul 23, 13:35 UTCJul 23, 15:25 UTC1h 50m
2026-07-23 FFT4989 DEN → SAN Jul 23, 06:20 UTCJul 23, 08:15 UTC1h 55m
2026-07-23 FFT4418 ELP → DEN Jul 23, 03:50 UTCJul 23, 05:00 UTC1h 10m
2026-07-22 FFT2261 DEN → ELP Jul 22, 23:40 UTCJul 23, 00:50 UTC1h 10m
2026-07-22 FFT1677 DSM → DEN Jul 22, 19:40 UTCJul 22, 21:10 UTC1h 30m
2026-07-22 FFT1678 RDU → SYR Jul 22, 17:15 UTCJul 22, 18:30 UTC1h 15m
2026-07-22 FFT1230 MCO → GRB Jul 22, 13:50 UTCJul 22, 16:05 UTC2h 15m
2026-07-22 FFT3439 - Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-22 FFT4061 MSN → DEN Jul 22, 01:05 UTCJul 22, 03:00 UTC1h 55m
2026-07-21 FFT1560 DEN → MSN Jul 21, 22:15 UTCJul 21, 23:55 UTC1h 40m
2026-07-21 FFT1401 - Jul 21, 17:25 UTCJul 21, 19:40 UTC2h 15m
2026-07-21 FFT1402 DEN → BNA Jul 21, 14:10 UTCJul 21, 16:20 UTC2h 10m
2026-07-21 FFT4946 LAX → DEN Jul 21, 04:00 UTCJul 21, 06:00 UTC2h 0m
2026-07-21 FFT4500 PDX → LAX Jul 21, 00:45 UTCJul 21, 02:45 UTC2h 0m
2026-07-21 FFT4500 PDX → LAX Jul 21, 00:46 UTCJul 21, 02:42 UTC1h 56m
2026-07-20 FFT2553 - Jul 20, 21:20 UTCJul 20, 23:30 UTC2h 10m
2026-07-20 FFT2908 ONT → DEN Jul 20, 17:55 UTCJul 20, 19:50 UTC1h 55m
2026-07-20 FFT2907 DEN → ONT Jul 20, 14:55 UTCJul 20, 16:45 UTC1h 50m
2026-07-20 FFT1815 AUS → DEN Jul 20, 11:50 UTCJul 20, 13:30 UTC1h 40m
2026-07-20 FFT2890 LAS → TPA Jul 20, 03:05 UTCJul 20, 04:45 UTC1h 40m
2026-07-19 FFT689 DCA → DEN Jul 19, 22:10 UTCJul 20, 01:20 UTC3h 10m
2026-07-19 FFT688 - Jul 19, 17:35 UTCJul 19, 20:35 UTC3h 0m
2026-07-19 FFT2549 DFW → DEN Jul 19, 14:25 UTCJul 19, 15:55 UTC1h 30m
2026-07-18 FFT3051 BNA → DFW Jul 18, 07:15 UTCJul 18, 08:35 UTC1h 20m
2026-07-18 FFT3052 DFW → BNA Jul 18, 04:35 UTCJul 18, 05:55 UTC1h 20m
2026-07-18 FFT3052 DFW → BNA Jul 18, 04:25 UTCJul 18, 05:54 UTC1h 29m
2026-07-17 FFT4993 MSY → DFW Jul 17, 21:00 UTCJul 17, 22:20 UTC1h 20m
2026-07-17 FFT4994 DFW → MSY Jul 17, 17:40 UTCJul 17, 20:00 UTC2h 20m
2026-07-17 FFT4994 DFW → MSY Jul 17, 17:40 UTCJul 17, 19:55 UTC2h 15m
2026-07-17 FFT2220 DFW → SJU Jul 17, 05:30 UTCJul 17, 05:39 UTC10m
2026-07-17 FFT3175 - Jul 17, 00:40 UTCJul 17, 02:50 UTC2h 10m
2026-07-16 FFT3990 DFW → DTW Jul 16, 20:55 UTCJul 16, 23:10 UTC2h 15m
2026-07-16 FFT3366 DEN → DFW Jul 16, 16:19 UTCJul 16, 17:54 UTC1h 35m
2026-07-16 FFT685 DCA → DEN Jul 16, 11:10 UTCJul 16, 14:15 UTC3h 5m
2026-07-15 FFT690 DEN → DCA Jul 15, 23:45 UTCJul 16, 02:40 UTC2h 55m
2026-07-15 FFT2047 - Jul 15, 20:30 UTCJul 15, 22:25 UTC1h 55m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the N335FR page for operator, model, and routing details .

Mode-S A3A8EF frequently asked

What is Mode-S code A3A8EF?
A3A8EF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N335FR.
Where is Mode-S A3A8EF registered?
Mode-S code A3A8EF is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A3A8EF broadcasting right now?
Mode-S A3A8EF is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3A8EF, octal 50724357, decimal 10,725,615.
What flights does A3A8EF operate?
Mode-S A3A8EF has broadcast 20 distinct callsigns, including FFT2291, FFT4499, FFT1790, FFT1248, FFT777.