Apparatus

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sensors Mode-S transponder

A9AF3E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N723FR · AIRBUS A-321 · operated by ALC A321 8640 LLC

Hex
A9AF3E
Octal
52327476
Decimal
11,120,446
Country
US
Tail
N723FR
Type
A321
No current signal · last broadcast Jul 26, 19:45 UTC
Flights observed
404
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:45 UTC

Last known position

Most recent position reported by Mode-S A9AF3E.

Country allocation

The ICAO 24-bit address A9AF3E 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
FFT2815 Frontier Airlines 9 2026-07-19
FFT4440 Frontier Airlines 7 2026-07-21
FFT4353 Frontier Airlines 7 2026-07-20
FFT2932 Frontier Airlines 7 2026-07-25
FFT2748 Frontier Airlines 7 2026-06-06
FFT4173 Frontier Airlines 6 2026-07-26
FFT3323 Frontier Airlines 6 2026-05-05
FFT1983 Frontier Airlines 6 2026-07-20
FFT4455 Frontier Airlines 5 2026-07-23
FFT4404 Frontier Airlines 5 2026-07-19
FFT3480 - 5 2026-06-29
FFT9423 Frontier Airlines 4 2026-05-27
FFT3536 Frontier Airlines 4 2026-05-04
FFT3521 Frontier Airlines 4 2026-06-16
FFT3412 Frontier Airlines 4 2026-06-15
FFT2925 Frontier Airlines 4 2026-05-02
FFT2715 - 4 2026-07-16
FFT2415 Frontier Airlines 4 2026-07-26
FFT2021 Frontier Airlines 4 2026-07-25
FFT2007 Frontier Airlines 4 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT4173 MCO → CLE Jul 26, 17:25 UTCJul 26, 19:40 UTC2h 15m
2026-07-26 FFT1542 MCO → PHL Jul 26, 13:15 UTCJul 26, 15:15 UTC2h 0m
2026-07-26 FFT2415 CLE → PHX Jul 26, 09:35 UTCJul 26, 11:35 UTC2h 0m
2026-07-26 FFT2112 ORD → PHL Jul 26, 02:15 UTCJul 26, 03:45 UTC1h 30m
2026-07-25 FFT2111 PHL → ORD Jul 25, 23:00 UTCJul 26, 00:40 UTC1h 40m
2026-07-25 FFT2932 SFO → LAS Jul 25, 18:00 UTCJul 25, 20:20 UTC2h 20m
2026-07-25 FFT2007 DTW → FLL Jul 25, 13:25 UTCJul 25, 15:55 UTC2h 30m
2026-07-25 FFT2021 PHL → DTW Jul 25, 10:35 UTCJul 25, 11:50 UTC1h 15m
2026-07-24 FFT2932 SFO → LAS Jul 24, 17:25 UTCJul 24, 19:40 UTC2h 15m
2026-07-24 FFT2007 - Jul 24, 13:25 UTCJul 24, 15:50 UTC2h 25m
2026-07-24 FFT2021 PHL → DTW Jul 24, 10:42 UTCJul 24, 11:57 UTC1h 15m
2026-07-24 FFT2021 PHL → DTW Jul 24, 10:45 UTCJul 24, 12:10 UTC1h 25m
2026-07-24 FFT1328 CLT → PHL Jul 24, 02:35 UTCJul 24, 03:35 UTC1h 0m
2026-07-23 FFT1984 FLL → ISP Jul 23, 23:30 UTCJul 24, 01:00 UTC1h 30m
2026-07-23 FFT4455 PHL → FLL Jul 23, 19:15 UTCJul 23, 21:55 UTC2h 40m
2026-07-23 FFT4455 PHL → FLL Jul 23, 19:15 UTCJul 23, 21:53 UTC2h 38m
2026-07-23 FFT1384 - Jul 23, 15:20 UTCJul 23, 16:35 UTC1h 15m
2026-07-23 FFT2387 PHL → MYR Jul 23, 12:20 UTCJul 23, 13:55 UTC1h 35m
2026-07-23 FFT1328 CLT → PHL Jul 23, 04:20 UTCJul 23, 05:35 UTC1h 15m
2026-07-23 FFT1328 CLT → PHL Jul 23, 03:48 UTCJul 23, 05:23 UTC1h 35m
2026-07-23 FFT1984 FLL → ISP Jul 23, 00:45 UTCJul 23, 02:20 UTC1h 35m
2026-07-22 FFT4455 PHL → FLL Jul 22, 19:45 UTCJul 22, 22:10 UTC2h 25m
2026-07-22 FFT2022 LAS → CVG Jul 22, 13:55 UTCJul 22, 15:00 UTC1h 5m
2026-07-21 FFT2008 FLL → DTW Jul 21, 15:35 UTCJul 21, 18:15 UTC2h 40m
2026-07-21 FFT2609 PHL → FLL Jul 21, 11:50 UTCJul 21, 14:05 UTC2h 15m
2026-07-21 FFT4440 FLL → PHL Jul 21, 02:35 UTCJul 21, 05:15 UTC2h 40m
2026-07-21 FFT4440 FLL → PHL Jul 21, 02:35 UTCJul 21, 05:14 UTC2h 39m
2026-07-20 FFT1983 ISP → FLL Jul 20, 23:50 UTCJul 21, 01:25 UTC1h 35m
2026-07-20 FFT4353 PHL → CLT Jul 20, 21:30 UTCJul 20, 22:35 UTC1h 5m
2026-07-20 FFT2022 LAS → CVG Jul 20, 19:00 UTCJul 20, 20:05 UTC1h 5m
2026-07-20 FFT2008 - Jul 20, 14:55 UTCJul 20, 17:20 UTC2h 25m
2026-07-20 FFT2609 PHL → FLL Jul 20, 10:55 UTCJul 20, 13:20 UTC2h 25m
2026-07-20 FFT2816 JAX → PHL Jul 20, 03:00 UTCJul 20, 04:40 UTC1h 40m
2026-07-19 FFT2815 PHL → JAX Jul 19, 23:50 UTCJul 20, 01:40 UTC1h 50m
2026-07-19 FFT2815 PHL → JAX Jul 19, 23:30 UTCJul 19, 23:35 UTC5m
2026-07-19 FFT2112 ORD → PHL Jul 19, 19:30 UTCJul 19, 21:05 UTC1h 35m
2026-07-19 FFT2111 - Jul 19, 04:55 UTCJul 19, 06:40 UTC1h 45m
2026-07-19 FFT4404 MCO → PHL Jul 19, 02:50 UTCJul 19, 02:55 UTC5m
2026-07-19 FFT4404 MCO → PHL Jul 19, 01:03 UTCJul 19, 02:44 UTC1h 41m
2026-07-19 FFT4404 MCO → PHL Jul 19, 00:45 UTCJul 19, 02:45 UTC2h 0m
2026-07-17 FFT4454 - Jul 17, 14:55 UTCJul 17, 16:44 UTC1h 50m
2026-07-17 FFT3761 MCO → IND Jul 17, 11:35 UTCJul 17, 13:25 UTC1h 50m
2026-07-17 FFT2280 - Jul 17, 03:25 UTCJul 17, 05:20 UTC1h 55m
2026-07-16 FFT1055 MCO → CLE Jul 16, 23:59 UTCJul 17, 01:55 UTC1h 55m
2026-07-16 FFT3916 - Jul 16, 19:45 UTCJul 16, 21:55 UTC2h 10m
2026-07-16 FFT2715 RSW → CLE Jul 16, 15:45 UTCJul 16, 18:00 UTC2h 15m
2026-07-16 FFT2338 - Jul 16, 12:05 UTCJul 16, 14:15 UTC2h 10m
2026-07-15 FFT1045 - Jul 15, 15:40 UTCJul 15, 17:50 UTC2h 10m
2026-07-15 FFT1046 - Jul 15, 11:55 UTCJul 15, 14:10 UTC2h 15m
2026-07-15 FFT3568 DFW → CLE Jul 15, 00:45 UTCJul 15, 03:05 UTC2h 20m

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 N723FR page for operator, model, and routing details .

Mode-S A9AF3E frequently asked

What is Mode-S code A9AF3E?
A9AF3E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N723FR.
Where is Mode-S A9AF3E registered?
Mode-S code A9AF3E 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 A9AF3E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9AF3E, octal 52327476, decimal 11,120,446.
What flights does A9AF3E operate?
Mode-S A9AF3E has broadcast 20 distinct callsigns, including FFT2815, FFT4440, FFT4353, FFT2932, FFT2748.