Apparatus

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sensors Mode-S transponder

A44AA2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N376FR · AIRBUS A-320neo · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A44AA2
Octal
51045242
Decimal
10,767,010
Country
US
Tail
N376FR
Type
A20N
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
441
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A44AA2.

Country allocation

The ICAO 24-bit address A44AA2 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
FFT3788 - 9 2026-07-21
FFT3787 Frontier Airlines 7 2026-07-21
FFT3393 - 5 2026-06-16
FFT2147 Frontier Airlines 5 2026-07-25
FFT1426 Frontier Airlines 5 2026-07-22
FFT9476 Frontier Airlines 4 2026-06-17
FFT4559 - 4 2026-06-26
FFT3699 Frontier Airlines 4 2026-06-20
FFT3560 Frontier Airlines 4 2026-05-27
FFT3383 Frontier Airlines 4 2026-07-22
FFT3278 Frontier Airlines 4 2026-07-22
FFT3277 Frontier Airlines 4 2026-07-22
FFT3021 - 4 2026-07-12
FFT2638 Frontier Airlines 4 2026-06-16
FFT2547 Frontier Airlines 4 2026-05-28
FFT2146 Frontier Airlines 4 2026-05-01
FFT1565 Frontier Airlines 4 2026-06-22
FFT1270 - 4 2026-07-12
FFT690 - 3 2026-07-18
FFT686 Frontier Airlines 3 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT1560 DEN → MSN Jul 26, 22:15 UTCJul 26, 22:30 UTC15m
2026-07-26 FFT4372 SNA → DEN Jul 26, 18:40 UTCJul 26, 20:30 UTC1h 50m
2026-07-26 FFT4371 DEN → SNA Jul 26, 15:25 UTCJul 26, 17:20 UTC1h 55m
2026-07-26 FFT3220 SLC → DEN Jul 26, 12:20 UTCJul 26, 13:20 UTC1h 0m
2026-07-26 FFT4251 DEN → SLC Jul 26, 04:45 UTCJul 26, 05:40 UTC55m
2026-07-26 FFT1127 MKE → MCO Jul 26, 01:50 UTCJul 26, 02:55 UTC1h 5m
2026-07-25 FFT1874 DEN → OMA Jul 25, 23:40 UTCJul 26, 00:40 UTC1h 0m
2026-07-25 FFT687 DCA → DEN Jul 25, 18:05 UTCJul 25, 21:25 UTC3h 20m
2026-07-25 FFT686 DEN → PIT Jul 25, 13:40 UTCJul 25, 16:30 UTC2h 50m
2026-07-25 FFT2147 DFW → DEN Jul 25, 10:25 UTCJul 25, 11:55 UTC1h 30m
2026-07-25 FFT2147 DFW → DEN Jul 25, 10:33 UTCJul 25, 11:51 UTC1h 18m
2026-07-25 FFT3203 IND → DFW Jul 25, 01:55 UTCJul 25, 03:35 UTC1h 40m
2026-07-24 FFT3202 DFW → IND Jul 24, 23:15 UTCJul 25, 00:50 UTC1h 35m
2026-07-24 FFT2471 EWR → DFW Jul 24, 17:50 UTCJul 24, 20:50 UTC3h 0m
2026-07-24 FFT2471 EWR → DFW Jul 24, 17:48 UTCJul 24, 20:42 UTC2h 54m
2026-07-24 FFT2472 DFW → EWR Jul 24, 12:55 UTCJul 24, 16:00 UTC3h 5m
2026-07-23 FFT3177 PHL → RSW Jul 23, 14:45 UTCJul 23, 16:50 UTC2h 5m
2026-07-23 FFT3178 DFW → DTW Jul 23, 11:20 UTCJul 23, 13:30 UTC2h 10m
2026-07-22 FFT3278 SLC → DFW Jul 22, 22:40 UTCJul 23, 00:55 UTC2h 15m
2026-07-22 FFT3277 DFW → SLC Jul 22, 19:10 UTCJul 22, 21:20 UTC2h 10m
2026-07-22 FFT1426 SAN → DFW Jul 22, 13:48 UTCJul 22, 16:27 UTC2h 39m
2026-07-22 FFT1426 SAN → DFW Jul 22, 13:55 UTCJul 22, 16:30 UTC2h 35m
2026-07-22 FFT3383 SAN → SFO Jul 22, 04:00 UTCJul 22, 05:10 UTC1h 10m
2026-07-21 FFT1425 DFW → SAN Jul 21, 23:15 UTCJul 22, 01:45 UTC2h 30m
2026-07-21 FFT3787 BWI → DFW Jul 21, 18:50 UTCJul 21, 21:30 UTC2h 40m
2026-07-21 FFT3788 DFW → BWI Jul 21, 14:40 UTCJul 21, 17:30 UTC2h 50m
2026-07-21 FFT3203 IND → DFW Jul 21, 01:55 UTCJul 21, 03:30 UTC1h 35m
2026-07-20 FFT3202 DFW → IND Jul 20, 23:15 UTCJul 21, 01:05 UTC1h 49m
2026-07-20 FFT1426 SAN → DFW Jul 20, 18:25 UTCJul 20, 21:05 UTC2h 40m
2026-07-20 FFT4306 SFO → SAN Jul 20, 15:45 UTCJul 20, 17:00 UTC1h 15m
2026-07-20 FFT3383 - Jul 20, 04:45 UTCJul 20, 05:50 UTC1h 5m
2026-07-19 FFT1425 DFW → SAN Jul 19, 23:35 UTCJul 20, 02:05 UTC2h 30m
2026-07-19 FFT3787 - Jul 19, 19:05 UTCJul 19, 21:45 UTC2h 40m
2026-07-19 FFT3788 DFW → BWI Jul 19, 14:45 UTCJul 19, 17:15 UTC2h 30m
2026-07-19 FFT3788 DFW → BWI Jul 19, 14:40 UTCJul 19, 17:13 UTC2h 33m
2026-07-19 FFT2550 DEN → DFW Jul 19, 11:15 UTCJul 19, 12:45 UTC1h 30m
2026-07-19 FFT3440 SFO → DEN Jul 19, 04:50 UTCJul 19, 06:50 UTC2h 0m
2026-07-19 FFT3440 SFO → DEN Jul 19, 04:52 UTCJul 19, 06:54 UTC2h 2m
2026-07-19 FFT1093 - Jul 19, 01:15 UTCJul 19, 03:25 UTC2h 10m
2026-07-19 FFT1093 DEN → SFO Jul 19, 01:11 UTCJul 19, 03:20 UTC2h 9m
2026-07-18 FFT3982 DEN → DCA Jul 18, 21:55 UTCJul 18, 23:00 UTC1h 5m
2026-07-18 FFT3981 DEN → SLC Jul 18, 19:25 UTCJul 18, 20:25 UTC1h 0m
2026-07-18 FFT685 DCA → DEN Jul 18, 11:05 UTCJul 18, 14:15 UTC3h 10m
2026-07-18 FFT690 DEN → DCA Jul 18, 00:19 UTCJul 18, 03:30 UTC3h 11m
2026-07-17 FFT4793 - Jul 17, 20:40 UTCJul 17, 22:00 UTC1h 20m
2026-07-17 FFT4794 - Jul 17, 18:00 UTCJul 17, 19:25 UTC1h 25m
2026-07-17 FFT3862 SLC → DEN Jul 17, 15:20 UTCJul 17, 16:19 UTC1h 0m
2026-07-17 FFT3219 DEN → SLC Jul 17, 12:10 UTCJul 17, 13:10 UTC1h 0m
2026-07-17 FFT1149 MSP → DEN Jul 17, 03:29 UTCJul 17, 04:51 UTC1h 22m
2026-07-17 FFT1149 MSP → DEN Jul 17, 03:20 UTCJul 17, 04:49 UTC1h 30m

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 N376FR page for operator, model, and routing details .

Mode-S A44AA2 frequently asked

What is Mode-S code A44AA2?
A44AA2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N376FR.
Where is Mode-S A44AA2 registered?
Mode-S code A44AA2 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 A44AA2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44AA2, octal 51045242, decimal 10,767,010.
What flights does A44AA2 operate?
Mode-S A44AA2 has broadcast 20 distinct callsigns, including FFT3788, FFT3787, FFT3393, FFT2147, FFT1426.