Apparatus

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sensors Mode-S transponder

A3904C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N329FR · AIRBUS A-320neo · operated by BANK OF UTAH TRUSTEE

Hex
A3904C
Octal
50710114
Decimal
10,719,308
Country
US
Tail
N329FR
Type
A20N
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
457
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S A3904C.

Country allocation

The ICAO 24-bit address A3904C 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
FFT2220 Frontier Airlines 8 2026-07-25
FFT3871 Frontier Airlines 6 2026-06-05
FFT9329 Frontier Airlines 5 2026-07-18
FFT4994 Frontier Airlines 5 2026-07-25
FFT4993 Frontier Airlines 5 2026-07-25
FFT3923 - 5 2026-07-15
FFT3046 - 5 2026-07-15
FFT3045 - 5 2026-07-15
FFT2526 Frontier Airlines 5 2026-06-07
FFT2219 Frontier Airlines 5 2026-07-25
FFT4685 Frontier Airlines 4 2026-07-10
FFT3872 Frontier Airlines 4 2026-06-05
FFT3560 - 4 2026-07-10
FFT2979 Frontier Airlines 4 2026-06-12
FFT1572 Frontier Airlines 4 2026-06-03
FFT1555 Frontier Airlines 4 2026-05-10
FFT1116 Frontier Airlines 4 2026-06-21
FFT689 Frontier Airlines 3 2026-04-17
FFT4957 Frontier Airlines 3 2026-06-06
FFT4793 Frontier Airlines 3 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT341 GUA → DFW Jul 26, 17:20 UTCJul 26, 20:10 UTC2h 50m
2026-07-26 FFT340 DFW → GUA Jul 26, 15:30 UTCJul 26, 15:35 UTC5m
2026-07-26 FFT340 DFW → GUA Jul 26, 12:45 UTCJul 26, 13:45 UTC1h 0m
2026-07-26 FFT340 DFW → GUA Jul 26, 12:45 UTCJul 26, 15:34 UTC2h 49m
2026-07-26 FFT3207 IAD → DFW Jul 26, 02:10 UTCJul 26, 04:40 UTC2h 30m
2026-07-25 FFT3208 DFW → IAD Jul 25, 22:15 UTCJul 26, 00:55 UTC2h 40m
2026-07-25 FFT4993 MSY → DFW Jul 25, 19:20 UTCJul 25, 20:25 UTC1h 5m
2026-07-25 FFT4993 MSY → DFW Jul 25, 19:23 UTCJul 25, 20:22 UTC59m
2026-07-25 FFT4994 DFW → MSY Jul 25, 17:10 UTCJul 25, 18:20 UTC1h 10m
2026-07-25 FFT2219 DFW → SFO Jul 25, 12:25 UTCJul 25, 15:00 UTC2h 35m
2026-07-25 FFT2219 DFW → SFO Jul 25, 10:40 UTCJul 25, 10:55 UTC15m
2026-07-25 FFT2220 DFW → SJU Jul 25, 08:30 UTCJul 25, 08:40 UTC10m
2026-07-25 FFT2220 DFW → SJU Jul 25, 04:20 UTCJul 25, 07:00 UTC2h 40m
2026-07-25 FFT3051 BNA → DFW Jul 25, 01:15 UTCJul 25, 02:45 UTC1h 30m
2026-07-24 FFT3052 DFW → BNA Jul 24, 22:15 UTCJul 24, 23:35 UTC1h 20m
2026-07-24 FFT4993 MSY → DFW Jul 24, 19:20 UTCJul 24, 20:30 UTC1h 10m
2026-07-24 FFT4994 DFW → MSY Jul 24, 17:05 UTCJul 24, 18:15 UTC1h 10m
2026-07-24 FFT4994 DFW → MSY Jul 24, 17:06 UTCJul 24, 18:14 UTC1h 8m
2026-07-24 FFT2219 DFW → SFO Jul 24, 11:05 UTCJul 24, 15:20 UTC4h 15m
2026-07-24 FFT2220 DFW → SJU Jul 24, 08:35 UTCJul 24, 08:45 UTC10m
2026-07-24 FFT2220 DFW → SJU Jul 24, 04:20 UTCJul 24, 06:55 UTC2h 35m
2026-07-24 FFT4559 IAD → DFW Jul 24, 00:20 UTCJul 24, 02:50 UTC2h 30m
2026-07-23 FFT3208 DFW → IAD Jul 23, 20:35 UTCJul 23, 23:15 UTC2h 40m
2026-07-23 FFT4690 ONT → DFW Jul 23, 15:45 UTCJul 23, 18:20 UTC2h 35m
2026-07-23 FFT4690 ONT → DFW Jul 23, 15:30 UTCJul 23, 18:19 UTC2h 49m
2026-07-23 FFT3131 IAH → ONT Jul 23, 11:45 UTCJul 23, 14:30 UTC2h 45m
2026-07-23 FFT1756 TPA → CVG Jul 23, 04:20 UTCJul 23, 07:10 UTC2h 50m
2026-07-23 FFT1756 TPA → CVG Jul 23, 03:57 UTCJul 23, 07:09 UTC3h 12m
2026-07-22 FFT4963 DFW → LAX Jul 22, 21:20 UTCJul 22, 23:55 UTC2h 35m
2026-07-22 FFT2274 LAX → DFW Jul 22, 17:05 UTCJul 22, 19:45 UTC2h 40m
2026-07-22 FFT2273 ATL → MSY Jul 22, 13:05 UTCJul 22, 15:40 UTC2h 35m
2026-07-22 FFT3241 PHL → PBI Jul 22, 03:50 UTCJul 22, 05:25 UTC1h 35m
2026-07-21 FFT1342 DFW → ORD Jul 21, 22:40 UTCJul 22, 00:45 UTC2h 5m
2026-07-21 FFT4993 MSY → DFW Jul 21, 19:23 UTCJul 21, 20:24 UTC1h 1m
2026-07-21 FFT4994 DFW → MSY Jul 21, 17:10 UTCJul 21, 18:20 UTC1h 10m
2026-07-21 FFT2219 DFW → SFO Jul 21, 10:50 UTCJul 21, 15:15 UTC4h 25m
2026-07-21 FFT2220 DFW → SJU Jul 21, 08:25 UTCJul 21, 08:40 UTC15m
2026-07-21 FFT2220 DFW → SJU Jul 21, 04:20 UTCJul 21, 06:55 UTC2h 35m
2026-07-20 FFT3175 - Jul 20, 23:50 UTCJul 21, 01:55 UTC2h 5m
2026-07-20 FFT3990 SAN → DFW Jul 20, 20:10 UTCJul 20, 22:25 UTC2h 15m
2026-07-20 FFT4690 - Jul 20, 15:35 UTCJul 20, 18:20 UTC2h 45m
2026-07-20 FFT3131 IAH → ONT Jul 20, 11:30 UTCJul 20, 14:15 UTC2h 45m
2026-07-20 FFT2996 DEN → IAH Jul 20, 03:25 UTCJul 20, 05:15 UTC1h 50m
2026-07-19 FFT4418 DEN → DEN Jul 19, 21:30 UTCJul 20, 02:00 UTC4h 30m
2026-07-19 FFT1401 BNA → DEN Jul 19, 17:30 UTCJul 19, 19:40 UTC2h 10m
2026-07-19 FFT1402 DEN → BNA Jul 19, 14:05 UTCJul 19, 16:15 UTC2h 10m
2026-07-18 FFT9329 CMH → TPA Jul 18, 14:20 UTCJul 18, 15:05 UTC45m
2026-07-18 FFT9329 CMH → TPA Jul 18, 13:15 UTCJul 18, 13:30 UTC15m
2026-07-18 FFT9329 CMH → TPA Jul 18, 09:35 UTCJul 18, 12:20 UTC2h 45m
2026-07-16 FFT1159 ONT → SFO Jul 16, 17:20 UTCJul 16, 18:19 UTC1h 0m

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 N329FR page for operator, model, and routing details .

Mode-S A3904C frequently asked

What is Mode-S code A3904C?
A3904C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N329FR.
Where is Mode-S A3904C registered?
Mode-S code A3904C 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 A3904C broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3904C, octal 50710114, decimal 10,719,308.
What flights does A3904C operate?
Mode-S A3904C has broadcast 20 distinct callsigns, including FFT2220, FFT3871, FFT9329, FFT4994, FFT4993.