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sensors Mode-S transponder

A3B05D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N337FR · AIRBUS A-320neo · operated by WELLS FARGO TRUST CO NA TRUSTEE

Hex
A3B05D
Octal
50730135
Decimal
10,727,517
Country
US
Tail
N337FR
Type
A20N
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
535
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A3B05D.

Country allocation

The ICAO 24-bit address A3B05D 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
FFT3665 Frontier Airlines 7 2026-07-25
FFT4726 Frontier Airlines 5 2026-05-14
FFT3277 - 5 2026-07-03
FFT2452 Frontier Airlines 5 2026-06-09
FFT4406 Frontier Airlines 4 2026-06-10
FFT3942 Frontier Airlines 4 2026-06-08
FFT3311 Frontier Airlines 4 2026-06-08
FFT2890 Frontier Airlines 4 2026-07-25
FFT1874 Frontier Airlines 4 2026-07-23
FFT1823 Frontier Airlines 4 2026-05-14
FFT1280 Frontier Airlines 4 2026-07-26
FFT1241 Frontier Airlines 4 2026-05-14
FFT1102 - 4 2026-07-13
FFT1003 - 4 2026-07-12
FFT687 - 3 2026-07-17
FFT686 - 3 2026-07-17
FFT4685 Frontier Airlines 3 2026-05-10
FFT4578 Frontier Airlines 3 2026-07-23
FFT4418 - 3 2026-06-28
FFT4236 - 3 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT3322 MIA → RDU Jul 26, 20:25 UTCJul 26, 21:15 UTC50m
2026-07-26 FFT2676 DFW → MIA Jul 26, 15:10 UTCJul 26, 17:50 UTC2h 40m
2026-07-26 FFT2135 MIA → DFW Jul 26, 11:00 UTCJul 26, 13:30 UTC2h 30m
2026-07-26 FFT1280 DEN → MIA Jul 26, 05:50 UTCJul 26, 09:10 UTC3h 21m
2026-07-26 FFT1859 AUS → DEN Jul 26, 01:30 UTCJul 26, 03:15 UTC1h 45m
2026-07-25 FFT1816 DEN → AUS Jul 25, 22:35 UTCJul 26, 00:20 UTC1h 45m
2026-07-25 FFT3666 SMF → DEN Jul 25, 18:40 UTCJul 25, 20:35 UTC1h 55m
2026-07-25 FFT3665 DEN → SMF Jul 25, 15:15 UTCJul 25, 17:20 UTC2h 5m
2026-07-25 FFT3665 DEN → SMF Jul 25, 15:14 UTCJul 25, 17:16 UTC2h 2m
2026-07-25 FFT1815 AUS → DEN Jul 25, 11:45 UTCJul 25, 13:30 UTC1h 45m
2026-07-25 FFT2890 LAS → TPA Jul 25, 03:30 UTCJul 25, 05:10 UTC1h 40m
2026-07-24 FFT689 DCA → DEN Jul 24, 22:30 UTCJul 25, 01:45 UTC3h 15m
2026-07-24 FFT688 DEN → DCA Jul 24, 17:40 UTCJul 24, 20:35 UTC2h 55m
2026-07-24 FFT2549 DFW → DEN Jul 24, 14:20 UTCJul 24, 15:50 UTC1h 30m
2026-07-24 FFT2550 DEN → DFW Jul 24, 11:15 UTCJul 24, 12:40 UTC1h 25m
2026-07-24 FFT4069 DFW → DEN Jul 24, 03:05 UTCJul 24, 05:00 UTC1h 55m
2026-07-23 FFT2148 DEN → DFW Jul 23, 23:55 UTCJul 24, 01:30 UTC1h 35m
2026-07-23 FFT1863 OKC → DEN Jul 23, 21:05 UTCJul 23, 22:20 UTC1h 15m
2026-07-23 FFT1928 DEN → OKC Jul 23, 18:50 UTCJul 23, 20:05 UTC1h 15m
2026-07-23 FFT1127 MKE → MCO Jul 23, 14:50 UTCJul 23, 16:00 UTC1h 10m
2026-07-23 FFT1874 DEN → OMA Jul 23, 12:10 UTCJul 23, 13:15 UTC1h 5m
2026-07-23 FFT4768 - Jul 23, 03:50 UTCJul 23, 05:15 UTC1h 25m
2026-07-23 FFT4578 SAN → PHX Jul 23, 01:20 UTCJul 23, 02:15 UTC55m
2026-07-22 FFT1571 PHX → SAN Jul 22, 23:10 UTCJul 23, 00:00 UTC50m
2026-07-22 FFT3871 SLC → PHX Jul 22, 18:55 UTCJul 22, 20:05 UTC1h 10m
2026-07-22 FFT3871 SLC → PHX Jul 22, 18:59 UTCJul 22, 20:03 UTC1h 4m
2026-07-22 FFT3872 PHX → SLC Jul 22, 16:25 UTCJul 22, 17:40 UTC1h 15m
2026-07-22 FFT4949 SLC → PHX Jul 22, 05:00 UTCJul 22, 05:25 UTC25m
2026-07-22 FFT3394 SFO → SLC Jul 22, 00:40 UTCJul 22, 02:05 UTC1h 25m
2026-07-21 FFT1191 PHX → SFO Jul 21, 21:45 UTCJul 21, 23:25 UTC1h 40m
2026-07-21 FFT1191 PHX → SFO Jul 21, 21:38 UTCJul 21, 23:24 UTC1h 46m
2026-07-21 FFT1703 SYR → DEN Jul 21, 17:30 UTCJul 21, 19:35 UTC2h 5m
2026-07-21 FFT1703 SYR → DEN Jul 21, 17:12 UTCJul 21, 19:31 UTC2h 19m
2026-07-21 FFT1957 DTW → IAH Jul 21, 13:50 UTCJul 21, 16:05 UTC2h 15m
2026-07-21 FFT4392 - Jul 21, 07:45 UTCJul 21, 11:45 UTC4h 0m
2026-07-21 FFT2697 - Jul 21, 01:30 UTCJul 21, 05:30 UTC4h 0m
2026-07-20 FFT2698 PHX → CLE Jul 20, 19:55 UTCJul 20, 23:45 UTC3h 50m
2026-07-18 FFT2141 PHL → LAS Jul 18, 15:50 UTCJul 18, 17:15 UTC1h 25m
2026-07-18 FFT3220 SLC → DEN Jul 18, 12:10 UTCJul 18, 13:10 UTC1h 0m
2026-07-18 FFT4251 DEN → SLC Jul 18, 04:25 UTCJul 18, 05:25 UTC1h 0m
2026-07-18 FFT1127 - Jul 18, 01:50 UTCJul 18, 03:00 UTC1h 11m
2026-07-18 FFT1874 - Jul 18, 00:00 UTCJul 18, 01:00 UTC1h 0m
2026-07-17 FFT1874 DEN → OMA Jul 17, 23:34 UTCJul 18, 00:56 UTC1h 22m
2026-07-17 FFT687 - Jul 17, 19:15 UTCJul 17, 22:29 UTC3h 15m
2026-07-17 FFT687 DCA → DEN Jul 17, 18:13 UTCJul 17, 22:29 UTC4h 16m
2026-07-17 FFT686 DEN → DCA Jul 17, 13:55 UTCJul 17, 17:05 UTC3h 10m
2026-07-17 FFT686 DEN → DCA Jul 17, 13:43 UTCJul 17, 16:59 UTC3h 16m
2026-07-17 FFT1994 - Jul 17, 04:25 UTCJul 17, 05:55 UTC1h 30m
2026-07-17 FFT1994 LAS → DEN Jul 17, 04:13 UTCJul 17, 05:51 UTC1h 38m
2026-07-17 FFT3891 OKC → LAS Jul 17, 00:50 UTCJul 17, 03:05 UTC2h 15m

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 N337FR page for operator, model, and routing details .

Mode-S A3B05D frequently asked

What is Mode-S code A3B05D?
A3B05D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N337FR.
Where is Mode-S A3B05D registered?
Mode-S code A3B05D 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 A3B05D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3B05D, octal 50730135, decimal 10,727,517.
What flights does A3B05D operate?
Mode-S A3B05D has broadcast 20 distinct callsigns, including FFT3665, FFT4726, FFT3277, FFT2452, FFT4406.