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
Broadcasting now · callsign FFT2273 · 31,825 ft
Flights observed
487
Distinct callsigns
20
Country
US
Last broadcast
38m ago

Current position

A3F436 is currently broadcasting. Map zoomed to live position.

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
FFT1067 - 6 2026-06-25
FFT4602 - 5 2026-06-18
FFT3566 - 5 2026-07-03
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
FFT3057 Frontier Airlines 4 2026-06-08
FFT2912 - 4 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFT2273 - Jul 14, 14:00 UTCJul 14, 15:30 UTC1h 30m
2026-07-14 FFT4000 - Jul 14, 08:50 UTCJul 14, 11:55 UTC3h 5m
2026-07-14 FFT3999 DFW → SFO Jul 14, 04:00 UTCJul 14, 07:10 UTC3h 10m
2026-07-13 FFT3223 - Jul 13, 22:20 UTCJul 14, 00:30 UTC2h 10m
2026-07-13 FFT3224 DFW → MSP Jul 13, 19:15 UTCJul 13, 21:10 UTC1h 55m
2026-07-13 FFT3366 DEN → DFW Jul 13, 16:20 UTCJul 13, 17:45 UTC1h 25m
2026-07-13 FFT685 DCA → DEN Jul 13, 11:10 UTCJul 13, 14:10 UTC3h 0m
2026-07-12 FFT690 DEN → DCA Jul 12, 22:45 UTCJul 13, 01:40 UTC2h 55m
2026-07-12 FFT1091 - Jul 12, 19:25 UTCJul 12, 20:50 UTC1h 25m
2026-07-12 FFT4344 - Jul 12, 16:50 UTCJul 12, 18:10 UTC1h 20m
2026-07-12 FFT3862 SLC → DEN Jul 12, 14:20 UTCJul 12, 15:20 UTC1h 0m
2026-07-12 FFT3862 SLC → DEN Jul 12, 14:28 UTCJul 12, 15:20 UTC52m
2026-07-12 FFT3981 DEN → SLC Jul 12, 12:20 UTCJul 12, 13:25 UTC1h 5m
2026-07-12 FFT3981 DEN → SLC Jul 12, 12:13 UTCJul 12, 13:20 UTC1h 7m
2026-07-12 FFT2016 LAS → DEN Jul 12, 08:35 UTCJul 12, 10:05 UTC1h 30m
2026-07-12 FFT2016 LAS → DEN Jul 12, 08:36 UTCJul 12, 10:03 UTC1h 27m
2026-07-12 FFT1257 TPA → LAS Jul 12, 03:15 UTCJul 12, 07:10 UTC3h 55m
2026-07-11 FFT1036 - Jul 11, 22:05 UTCJul 12, 00:25 UTC2h 20m
2026-07-11 FFT1035 TPA → DTW Jul 11, 18:45 UTCJul 11, 20:55 UTC2h 10m
2026-07-11 FFT1668 - Jul 11, 15:20 UTCJul 11, 17:00 UTC1h 40m
2026-07-11 FFT1303 - Jul 11, 11:50 UTCJul 11, 13:55 UTC2h 5m
2026-07-11 FFT2912 - Jul 11, 03:50 UTCJul 11, 04:30 UTC40m
2026-07-10 FFT2912 - Jul 10, 22:10 UTCJul 11, 00:15 UTC2h 5m
2026-07-10 FFT4435 TPA → ATL Jul 10, 18:30 UTCJul 10, 19:35 UTC1h 5m
2026-07-10 FFT1668 - Jul 10, 15:05 UTCJul 10, 16:45 UTC1h 40m
2026-07-10 FFT1303 - Jul 10, 11:50 UTCJul 10, 13:40 UTC1h 50m
2026-07-10 FFT2746 DEN → TPA Jul 10, 07:05 UTCJul 10, 10:15 UTC3h 10m
2026-07-10 FFT1247 - Jul 10, 01:55 UTCJul 10, 04:45 UTC2h 50m
2026-07-09 FFT1248 DEN → GRR Jul 9, 22:55 UTCJul 10, 01:00 UTC2h 5m
2026-07-09 FFT1248 DEN → GRR Jul 9, 21:42 UTCJul 10, 00:59 UTC3h 17m
2026-07-09 FFT1113 TPA → DEN Jul 9, 17:30 UTCJul 9, 20:40 UTC3h 10m
2026-07-09 FFT2748 DEN → TPA Jul 9, 12:35 UTCJul 9, 15:40 UTC3h 5m
2026-07-09 FFT1483 ORD → DEN Jul 9, 05:50 UTCJul 9, 07:50 UTC2h 0m
2026-07-09 FFT3174 DEN → ORD Jul 9, 01:25 UTCJul 9, 03:35 UTC2h 10m
2026-07-08 FFT1094 - Jul 8, 20:30 UTCJul 8, 23:10 UTC2h 40m
2026-07-08 FFT1229 DEN → SFO Jul 8, 16:40 UTCJul 8, 18:55 UTC2h 15m
2026-07-08 FFT1859 - Jul 8, 02:30 UTCJul 8, 04:35 UTC2h 5m
2026-07-07 FFT1816 DEN → AUS Jul 7, 22:50 UTCJul 8, 00:45 UTC1h 55m
2026-07-07 FFT1149 MSP → DEN Jul 7, 03:40 UTCJul 7, 05:15 UTC1h 35m
2026-07-07 FFT1149 MSP → DEN Jul 7, 03:29 UTCJul 7, 05:11 UTC1h 42m
2026-07-07 FFT1292 DEN → MSP Jul 7, 00:50 UTCJul 7, 02:25 UTC1h 35m
2026-07-06 FFT2107 - Jul 6, 22:00 UTCJul 6, 23:15 UTC1h 15m
2026-07-06 FFT2108 - Jul 6, 19:20 UTCJul 6, 20:25 UTC1h 5m
2026-07-06 FFT4372 - Jul 6, 16:10 UTCJul 6, 18:00 UTC1h 50m
2026-07-06 FFT4371 DEN → SNA Jul 6, 12:53 UTCJul 6, 14:52 UTC1h 59m
2026-07-06 FFT4371 DEN → SNA Jul 6, 12:55 UTCJul 6, 14:55 UTC2h 0m
2026-07-05 FFT3725 - Jul 5, 00:20 UTCJul 5, 02:50 UTC2h 30m
2026-07-04 FFT3286 DEN → CVG Jul 4, 20:30 UTCJul 4, 23:05 UTC2h 35m
2026-07-04 FFT4639 - Jul 4, 16:05 UTCJul 4, 18:50 UTC2h 45m
2026-07-04 FFT1918 DEN → CLE Jul 4, 12:20 UTCJul 4, 14:50 UTC2h 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 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?
Yes. Mode-S A3F436 is currently airborne.
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.