Apparatus

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sensors Mode-S transponder

A3F436

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N354FR · AIRBUS A-320neo · operated by UMB BANK NA TRUSTEE

Hex
A3F436
Octal
50772066
Decimal
10,744,886
Country
US
Tail
N354FR
Type
A20N
No current signal · last broadcast Jul 26, 20:20 UTC
Flights observed
559
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:20 UTC

Last known position

Most recent position reported by Mode-S A3F436.

Country allocation

The ICAO 24-bit address A3F436 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
FFT2467 - 8 2026-06-20
FFT3454 - 7 2026-06-17
FFT3453 - 7 2026-06-18
FFT4406 - 6 2026-06-24
FFT3322 Frontier Airlines 6 2026-04-27
FFT2410 - 6 2026-06-20
FFT2261 Frontier Airlines 6 2026-07-23
FFT1067 - 6 2026-06-25
FFT4602 - 5 2026-06-18
FFT3566 - 5 2026-07-03
FFT3229 - 5 2026-07-16
FFT3073 - 5 2026-06-20
FFT1116 Frontier Airlines 5 2026-05-18
FFT1094 - 5 2026-07-08
FFT4435 - 4 2026-07-10
FFT4076 Frontier Airlines 4 2026-06-17
FFT3923 Frontier Airlines 4 2026-06-10
FFT3512 Frontier Airlines 4 2026-06-08
FFT3321 Frontier Airlines 4 2026-04-27
FFT3074 Frontier Airlines 4 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT3375 MCI → DEN Jul 26, 19:00 UTCJul 26, 20:20 UTC1h 20m
2026-07-26 FFT4828 DEN → MCI Jul 26, 16:25 UTCJul 26, 17:30 UTC1h 5m
2026-07-26 FFT1500 ONT → DEN Jul 26, 13:00 UTCJul 26, 14:45 UTC1h 45m
2026-07-26 FFT1261 DEN → ONT Jul 26, 04:45 UTCJul 26, 06:30 UTC1h 45m
2026-07-26 FFT4567 STL → DEN Jul 26, 01:05 UTCJul 26, 02:50 UTC1h 45m
2026-07-25 FFT3302 DEN → STL Jul 25, 22:20 UTCJul 26, 00:00 UTC1h 40m
2026-07-25 FFT2513 GRR → TPA Jul 25, 16:55 UTCJul 25, 20:15 UTC3h 20m
2026-07-25 FFT2513 GRR → TPA Jul 25, 17:00 UTCJul 25, 20:09 UTC3h 9m
2026-07-25 FFT2514 DEN → PHL Jul 25, 12:20 UTCJul 25, 15:15 UTC2h 55m
2026-07-25 FFT4946 LAX → DEN Jul 25, 04:10 UTCJul 25, 06:05 UTC1h 55m
2026-07-25 FFT4500 PDX → LAX Jul 25, 00:50 UTCJul 25, 03:00 UTC2h 10m
2026-07-24 FFT2553 DEN → PDX Jul 24, 21:20 UTCJul 24, 23:40 UTC2h 20m
2026-07-24 FFT2908 ONT → DEN Jul 24, 17:55 UTCJul 24, 19:45 UTC1h 50m
2026-07-24 FFT2908 ONT → DEN Jul 24, 18:02 UTCJul 24, 19:40 UTC1h 38m
2026-07-24 FFT2907 DEN → ONT Jul 24, 14:55 UTCJul 24, 16:45 UTC1h 50m
2026-07-24 FFT1815 AUS → DEN Jul 24, 11:35 UTCJul 24, 13:20 UTC1h 45m
2026-07-24 FFT2890 LAS → TPA Jul 24, 03:45 UTCJul 24, 05:30 UTC1h 45m
2026-07-24 FFT4418 ELP → DEN Jul 24, 01:20 UTCJul 24, 02:25 UTC1h 5m
2026-07-23 FFT2261 DEN → ELP Jul 23, 21:30 UTCJul 23, 22:40 UTC1h 10m
2026-07-23 FFT2261 DEN → ELP Jul 23, 21:35 UTCJul 23, 22:49 UTC1h 14m
2026-07-23 FFT2908 ONT → DEN Jul 23, 18:10 UTCJul 23, 19:55 UTC1h 45m
2026-07-23 FFT2907 DEN → ONT Jul 23, 14:50 UTCJul 23, 16:40 UTC1h 50m
2026-07-23 FFT1733 CVG → PHX Jul 23, 09:45 UTCJul 23, 13:10 UTC3h 25m
2026-07-23 FFT1691 BUF → MCO Jul 23, 00:30 UTCJul 23, 02:45 UTC2h 15m
2026-07-22 FFT3262 MCO → BUF Jul 22, 20:50 UTCJul 22, 23:05 UTC2h 15m
2026-07-22 FFT3819 PIT → MCO Jul 22, 17:35 UTCJul 22, 19:20 UTC1h 45m
2026-07-22 FFT1620 MCO → PIT Jul 22, 14:00 UTCJul 22, 16:05 UTC2h 5m
2026-07-22 FFT2594 MCO → MCO Jul 22, 03:15 UTCJul 22, 12:40 UTC9h 25m
2026-07-22 FFT1745 CLE → LAS Jul 22, 00:10 UTCJul 22, 01:05 UTC55m
2026-07-21 FFT1745 CLE → LAS Jul 21, 22:35 UTCJul 21, 22:50 UTC15m
2026-07-21 FFT2868 MCO → SJU Jul 21, 20:50 UTCJul 21, 21:10 UTC20m
2026-07-21 FFT2868 MCO → SJU Jul 21, 18:40 UTCJul 21, 19:15 UTC35m
2026-07-21 FFT1482 DFW → MCO Jul 21, 15:15 UTCJul 21, 17:30 UTC2h 15m
2026-07-21 FFT4017 BOS → PHL Jul 21, 11:35 UTCJul 21, 13:45 UTC2h 10m
2026-07-21 FFT2615 LGA → MCO Jul 21, 01:30 UTCJul 21, 03:30 UTC2h 0m
2026-07-20 FFT3134 CLT → LGA Jul 20, 22:30 UTCJul 21, 00:00 UTC1h 30m
2026-07-20 FFT2452 DEN → MSY Jul 20, 19:40 UTCJul 20, 21:05 UTC1h 25m
2026-07-20 FFT2452 DEN → MSY Jul 20, 19:13 UTCJul 20, 21:04 UTC1h 51m
2026-07-20 FFT3941 ISP → MCO Jul 20, 15:00 UTCJul 20, 17:15 UTC2h 15m
2026-07-20 FFT3942 MCO → ISP Jul 20, 11:20 UTCJul 20, 13:35 UTC2h 15m
2026-07-20 FFT3942 MCO → ISP Jul 20, 11:23 UTCJul 20, 13:31 UTC2h 8m
2026-07-20 FFT2451 CLT → MCO Jul 20, 01:05 UTCJul 20, 02:15 UTC1h 10m
2026-07-20 FFT2451 CLT → MCO Jul 20, 01:04 UTCJul 20, 02:12 UTC1h 8m
2026-07-19 FFT3133 PHL → RDU Jul 19, 22:20 UTCJul 19, 23:50 UTC1h 30m
2026-07-19 FFT2432 TPA → CLE Jul 19, 17:35 UTCJul 19, 19:50 UTC2h 15m
2026-07-19 FFT2013 - Jul 19, 14:05 UTCJul 19, 16:00 UTC1h 55m
2026-07-19 FFT2742 MCO → TTN Jul 19, 10:15 UTCJul 19, 12:20 UTC2h 5m
2026-07-19 FFT2280 - Jul 19, 04:00 UTCJul 19, 05:50 UTC1h 50m
2026-07-19 FFT2280 CLE → MCO Jul 19, 04:06 UTCJul 19, 05:50 UTC1h 44m
2026-07-19 FFT1055 MCO → CLE Jul 19, 00:10 UTCJul 19, 02:15 UTC2h 5m

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 N354FR page for operator, model, and routing details .

Mode-S A3F436 frequently asked

What is Mode-S code A3F436?
A3F436 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N354FR.
Where is Mode-S A3F436 registered?
Mode-S code A3F436 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 A3F436 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3F436, octal 50772066, decimal 10,744,886.
What flights does A3F436 operate?
Mode-S A3F436 has broadcast 20 distinct callsigns, including FFT2467, FFT3454, FFT3453, FFT4406, FFT3322.