Apparatus

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sensors Mode-S transponder

A3DF4A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N349FR · AIRBUS A-320neo · operated by UMB BANK NA TRUSTEE

Hex
A3DF4A
Octal
50757512
Decimal
10,739,530
Country
US
Tail
N349FR
Type
A20N
No current signal · last broadcast 1d ago
Flights observed
535
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A3DF4A.

Country allocation

The ICAO 24-bit address A3DF4A 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
FFT688 Frontier Airlines 7 2026-05-28
FFT689 Frontier Airlines 6 2026-05-28
FFT685 Frontier Airlines 6 2026-07-26
FFT2297 - 6 2026-07-09
FFT4612 - 5 2026-06-16
FFT4401 Frontier Airlines 5 2026-07-20
FFT3262 Frontier Airlines 5 2026-07-05
FFT2440 Frontier Airlines 5 2026-05-17
FFT690 Frontier Airlines 4 2026-07-25
FFT4685 Frontier Airlines 4 2026-06-24
FFT4129 Frontier Airlines 4 2026-07-20
FFT3738 Frontier Airlines 4 2026-07-21
FFT3699 - 4 2026-07-19
FFT3378 Frontier Airlines 4 2026-07-23
FFT3292 Frontier Airlines 4 2026-07-20
FFT3046 Frontier Airlines 4 2026-06-11
FFT3037 Frontier Airlines 4 2026-07-21
FFT3016 Frontier Airlines 4 2026-07-20
FFT2520 - 4 2026-06-29
FFT2216 Frontier Airlines 4 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT3990 SAN → DFW Jul 26, 21:05 UTCJul 26, 22:30 UTC1h 25m
2026-07-26 FFT3366 DEN → DFW Jul 26, 16:30 UTCJul 26, 17:55 UTC1h 25m
2026-07-26 FFT685 DCA → DEN Jul 26, 11:20 UTCJul 26, 14:40 UTC3h 20m
2026-07-26 FFT685 DCA → DEN Jul 26, 11:14 UTCJul 26, 14:35 UTC3h 21m
2026-07-25 FFT690 DEN → DCA Jul 25, 23:25 UTCJul 26, 02:15 UTC2h 50m
2026-07-25 FFT4793 FAR → DEN Jul 25, 19:55 UTCJul 25, 21:25 UTC1h 30m
2026-07-25 FFT4794 DEN → FAR Jul 25, 17:20 UTCJul 25, 18:45 UTC1h 25m
2026-07-25 FFT3862 SLC → DEN Jul 25, 15:15 UTCJul 25, 16:15 UTC1h 0m
2026-07-25 FFT3219 PHL → FLL Jul 25, 12:55 UTCJul 25, 13:55 UTC1h 0m
2026-07-25 FFT3219 PHL → FLL Jul 25, 12:43 UTCJul 25, 13:53 UTC1h 10m
2026-07-25 FFT3205 IAH → DEN Jul 25, 03:10 UTCJul 25, 05:05 UTC1h 55m
2026-07-25 FFT3205 IAH → DEN Jul 25, 03:22 UTCJul 25, 05:04 UTC1h 42m
2026-07-25 FFT3228 DEN → IAH Jul 25, 00:05 UTCJul 25, 01:55 UTC1h 50m
2026-07-24 FFT3406 SEA → DEN Jul 24, 19:55 UTCJul 24, 22:05 UTC2h 10m
2026-07-24 FFT1175 PHL → MCO Jul 24, 15:30 UTCJul 24, 17:55 UTC2h 25m
2026-07-24 FFT1279 MIA → DEN Jul 24, 10:25 UTCJul 24, 14:00 UTC3h 35m
2026-07-24 FFT3442 ATL → MIA Jul 24, 01:15 UTCJul 24, 02:40 UTC1h 25m
2026-07-23 FFT4405 MIA → ATL Jul 23, 21:50 UTCJul 23, 23:10 UTC1h 20m
2026-07-23 FFT2272 ATL → LGA Jul 23, 18:35 UTCJul 23, 20:25 UTC1h 50m
2026-07-23 FFT3059 MIA → ATL Jul 23, 15:25 UTCJul 23, 16:50 UTC1h 25m
2026-07-23 FFT3377 SJU → MIA Jul 23, 11:40 UTCJul 23, 13:50 UTC2h 10m
2026-07-23 FFT3378 LGA → MIA Jul 23, 03:45 UTCJul 23, 03:55 UTC10m
2026-07-23 FFT3378 LGA → MIA Jul 23, 01:40 UTCJul 23, 02:05 UTC25m
2026-07-22 FFT2335 PHL → PHX Jul 22, 22:30 UTCJul 23, 00:00 UTC1h 30m
2026-07-22 FFT3322 MIA → RDU Jul 22, 19:20 UTCJul 22, 20:55 UTC1h 35m
2026-07-22 FFT3322 MIA → RDU Jul 22, 19:20 UTCJul 22, 20:53 UTC1h 33m
2026-07-22 FFT2676 DFW → MIA Jul 22, 15:20 UTCJul 22, 17:50 UTC2h 30m
2026-07-22 FFT2135 MIA → DFW Jul 22, 11:20 UTCJul 22, 13:20 UTC2h 0m
2026-07-22 FFT1068 IAH → MIA Jul 22, 01:55 UTCJul 22, 04:10 UTC2h 15m
2026-07-21 FFT2395 BUF → RSW Jul 21, 22:40 UTCJul 22, 00:35 UTC1h 55m
2026-07-21 FFT3037 MIA → CLT Jul 21, 19:05 UTCJul 21, 20:40 UTC1h 35m
2026-07-21 FFT4406 ATL → MIA Jul 21, 16:05 UTCJul 21, 17:30 UTC1h 25m
2026-07-21 FFT2483 MDW → SFO Jul 21, 12:40 UTCJul 21, 14:05 UTC1h 25m
2026-07-21 FFT4552 LAS → MIA Jul 21, 06:05 UTCJul 21, 10:50 UTC4h 45m
2026-07-21 FFT3738 SNA → LAS Jul 21, 03:35 UTCJul 21, 04:25 UTC50m
2026-07-21 FFT3582 SFO → SNA Jul 21, 01:20 UTCJul 21, 02:30 UTC1h 10m
2026-07-20 FFT4401 LAS → SFO Jul 20, 22:55 UTCJul 21, 00:00 UTC1h 4m
2026-07-20 FFT3292 LAX → LAS Jul 20, 19:25 UTCJul 20, 20:10 UTC45m
2026-07-20 FFT4129 SLC → LAX Jul 20, 16:25 UTCJul 20, 16:30 UTC5m
2026-07-20 FFT4129 SLC → LAX Jul 20, 16:32 UTCJul 20, 17:48 UTC1h 16m
2026-07-20 FFT3016 LAS → SLC Jul 20, 14:10 UTCJul 20, 15:15 UTC1h 5m
2026-07-20 FFT4242 MIA → MDW Jul 20, 04:20 UTCJul 20, 05:15 UTC55m
2026-07-20 FFT4241 MDW → MIA Jul 20, 01:30 UTCJul 20, 02:25 UTC55m
2026-07-19 FFT1850 - Jul 19, 22:50 UTCJul 20, 00:00 UTC1h 10m
2026-07-19 FFT3581 SNA → SFO Jul 19, 20:30 UTCJul 19, 21:25 UTC55m
2026-07-19 FFT1699 CVG → ATL Jul 19, 18:35 UTCJul 19, 19:20 UTC45m
2026-07-19 FFT4108 BUR → LAS Jul 19, 16:15 UTCJul 19, 17:05 UTC50m
2026-07-19 FFT4107 LAS → BUR Jul 19, 14:15 UTCJul 19, 15:00 UTC45m
2026-07-19 FFT4551 MIA → LAS Jul 19, 05:30 UTCJul 19, 10:05 UTC4h 35m
2026-07-19 FFT3699 - Jul 19, 02:40 UTCJul 19, 04:10 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 N349FR page for operator, model, and routing details .

Mode-S A3DF4A frequently asked

What is Mode-S code A3DF4A?
A3DF4A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N349FR.
Where is Mode-S A3DF4A registered?
Mode-S code A3DF4A 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 A3DF4A broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3DF4A, octal 50757512, decimal 10,739,530.
What flights does A3DF4A operate?
Mode-S A3DF4A has broadcast 20 distinct callsigns, including FFT688, FFT689, FFT685, FFT2297, FFT4612.