Apparatus

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sensors Mode-S transponder

A44E59

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N377FR · AIRBUS A-320neo · operated by BANK OF UTAH TRUSTEE

Hex
A44E59
Octal
51047131
Decimal
10,767,961
Country
US
Tail
N377FR
Type
A20N
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
581
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A44E59.

Country allocation

The ICAO 24-bit address A44E59 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
FFT4685 Frontier Airlines 8 2026-06-26
FFT4726 - 6 2026-06-24
FFT4686 - 6 2026-06-26
FFT1668 - 6 2026-07-08
FFT4158 Frontier Airlines 5 2026-05-08
FFT187 Frontier Airlines 5 2026-07-24
FFT4672 Frontier Airlines 4 2026-04-29
FFT4671 Frontier Airlines 4 2026-04-30
FFT4578 - 4 2026-07-15
FFT4435 - 4 2026-07-08
FFT4017 - 4 2026-06-19
FFT3801 Frontier Airlines 4 2026-04-23
FFT3624 Frontier Airlines 4 2026-06-13
FFT2912 - 4 2026-07-08
FFT2698 Frontier Airlines 4 2026-04-30
FFT2594 Frontier Airlines 4 2026-06-12
FFT2530 Frontier Airlines 4 2026-06-20
FFT2452 - 4 2026-06-26
FFT2249 Frontier Airlines 4 2026-06-15
FFT1961 - 4 2026-06-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT1689 PWM → RDU Jul 26, 21:10 UTCJul 26, 22:15 UTC1h 5m
2026-07-26 FFT1690 RDU → PWM Jul 26, 17:30 UTCJul 26, 19:45 UTC2h 15m
2026-07-26 FFT4807 PHL → TPA Jul 26, 14:00 UTCJul 26, 16:05 UTC2h 5m
2026-07-26 FFT1204 MCO → BDL Jul 26, 03:05 UTCJul 26, 05:25 UTC2h 20m
2026-07-25 FFT1203 PHL → MIA Jul 25, 23:20 UTCJul 26, 01:45 UTC2h 25m
2026-07-25 FFT2538 TPA → PHL Jul 25, 19:35 UTCJul 25, 21:35 UTC2h 0m
2026-07-25 FFT4807 PHL → TPA Jul 25, 15:55 UTCJul 25, 18:20 UTC2h 25m
2026-07-25 FFT2508 MCO → PHL Jul 25, 02:00 UTCJul 25, 04:15 UTC2h 15m
2026-07-24 FFT186 GUA → MCO Jul 24, 20:55 UTCJul 24, 23:40 UTC2h 45m
2026-07-24 FFT187 MCO → GUA Jul 24, 17:15 UTCJul 24, 18:15 UTC1h 0m
2026-07-24 FFT187 MCO → GUA Jul 24, 16:58 UTCJul 24, 19:40 UTC2h 42m
2026-07-24 FFT2867 ISP → PBI Jul 24, 14:35 UTCJul 24, 15:30 UTC55m
2026-07-24 FFT3506 MCO → SJU Jul 24, 11:35 UTCJul 24, 11:45 UTC10m
2026-07-24 FFT3506 MCO → SJU Jul 24, 09:20 UTCJul 24, 09:55 UTC35m
2026-07-24 FFT1351 BUF → MCO Jul 24, 01:30 UTCJul 24, 03:35 UTC2h 5m
2026-07-23 FFT2980 RDU → BUF Jul 23, 23:10 UTCJul 24, 00:25 UTC1h 15m
2026-07-23 FFT1234 MCO → RDU Jul 23, 20:20 UTCJul 23, 21:40 UTC1h 20m
2026-07-23 FFT1097 BQN → MCO Jul 23, 16:17 UTCJul 23, 18:24 UTC2h 7m
2026-07-23 FFT1097 MCO → MCO Jul 23, 12:25 UTCJul 23, 18:30 UTC6h 5m
2026-07-23 FFT2520 DEN → MCO Jul 23, 07:35 UTCJul 23, 10:40 UTC3h 5m
2026-07-23 FFT2554 PDX → DEN Jul 23, 03:15 UTCJul 23, 05:20 UTC2h 5m
2026-07-23 FFT2554 PDX → DEN Jul 23, 03:22 UTCJul 23, 05:15 UTC1h 53m
2026-07-22 FFT2553 DEN → PDX Jul 22, 21:15 UTCJul 22, 23:25 UTC2h 10m
2026-07-22 FFT2908 ONT → DEN Jul 22, 18:00 UTCJul 22, 19:45 UTC1h 45m
2026-07-22 FFT2907 DEN → ONT Jul 22, 15:00 UTCJul 22, 16:45 UTC1h 45m
2026-07-22 FFT1149 MSP → DEN Jul 22, 03:20 UTCJul 22, 04:55 UTC1h 35m
2026-07-22 FFT1292 DEN → MSP Jul 22, 00:35 UTCJul 22, 02:05 UTC1h 30m
2026-07-21 FFT4768 PHX → DEN Jul 21, 21:40 UTCJul 21, 23:00 UTC1h 20m
2026-07-21 FFT2105 DEN → PHX Jul 21, 18:30 UTCJul 21, 19:50 UTC1h 20m
2026-07-21 FFT2549 DFW → DEN Jul 21, 14:35 UTCJul 21, 16:05 UTC1h 30m
2026-07-21 FFT2999 MDW → DFW Jul 21, 00:50 UTCJul 21, 02:35 UTC1h 45m
2026-07-20 FFT2882 DFW → MDW Jul 20, 21:50 UTCJul 20, 23:40 UTC1h 50m
2026-07-20 FFT2274 LAX → DFW Jul 20, 17:10 UTCJul 20, 20:05 UTC2h 55m
2026-07-20 FFT2273 ATL → MSY Jul 20, 12:50 UTCJul 20, 15:14 UTC2h 24m
2026-07-20 FFT2273 ATL → MSY Jul 20, 12:50 UTCJul 20, 15:15 UTC2h 25m
2026-07-20 FFT1887 - Jul 20, 03:30 UTCJul 20, 05:10 UTC1h 40m
2026-07-20 FFT1887 MDW → DFW Jul 20, 03:27 UTCJul 20, 05:05 UTC1h 38m
2026-07-20 FFT2882 DFW → MDW Jul 20, 00:20 UTCJul 20, 02:35 UTC2h 15m
2026-07-19 FFT2343 RDU → ATL Jul 19, 19:40 UTCJul 19, 22:00 UTC2h 20m
2026-07-19 FFT1168 ATL → RDU Jul 19, 10:45 UTCJul 19, 11:50 UTC1h 5m
2026-07-18 FFT124 MBJ → ATL Jul 18, 19:30 UTCJul 18, 21:05 UTC1h 35m
2026-07-18 FFT124 MBJ → ATL Jul 18, 18:44 UTCJul 18, 21:02 UTC2h 18m
2026-07-18 FFT125 - Jul 18, 14:45 UTCJul 18, 16:20 UTC1h 35m
2026-07-18 FFT125 ATL → MBJ Jul 18, 14:42 UTCJul 18, 17:12 UTC2h 30m
2026-07-18 FFT2292 MDW → ATL Jul 18, 11:17 UTCJul 18, 12:38 UTC1h 21m
2026-07-18 FFT2292 MDW → ATL Jul 18, 11:10 UTCJul 18, 12:35 UTC1h 25m
2026-07-18 FFT2291 ATL → MDW Jul 18, 04:55 UTCJul 18, 06:35 UTC1h 40m
2026-07-18 FFT2899 DTW → ATL Jul 18, 00:50 UTCJul 18, 02:19 UTC1h 30m
2026-07-17 FFT2898 ATL → DTW Jul 17, 21:55 UTCJul 17, 23:30 UTC1h 35m
2026-07-17 FFT2483 - Jul 17, 15:40 UTCJul 17, 16:59 UTC1h 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 N377FR page for operator, model, and routing details .

Mode-S A44E59 frequently asked

What is Mode-S code A44E59?
A44E59 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N377FR.
Where is Mode-S A44E59 registered?
Mode-S code A44E59 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 A44E59 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A44E59, octal 51047131, decimal 10,767,961.
What flights does A44E59 operate?
Mode-S A44E59 has broadcast 20 distinct callsigns, including FFT4685, FFT4726, FFT4686, FFT1668, FFT4158.