Apparatus

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sensors Mode-S transponder

A53DAC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N437FR · AIRBUS A-320neo · operated by FRONTIER AIRLINES INC.

Hex
A53DAC
Octal
51236654
Decimal
10,829,228
Country
US
Tail
N437FR
Type
A20N
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
592
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A53DAC.

Country allocation

The ICAO 24-bit address A53DAC 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
FFT1746 - 8 2026-07-18
FFT3377 - 7 2026-07-01
FFT2284 Frontier Airlines 7 2026-05-15
FFT1016 Frontier Airlines 7 2026-04-17
FFT3506 Frontier Airlines 6 2026-07-20
FFT2996 Frontier Airlines 6 2026-06-04
FFT2867 - 6 2026-07-20
FFT2745 - 6 2026-06-24
FFT2250 Frontier Airlines 6 2026-07-18
FFT2249 Frontier Airlines 6 2026-07-17
FFT1824 Frontier Airlines 6 2026-07-17
FFT1745 - 6 2026-07-19
FFT4794 Frontier Airlines 5 2026-06-24
FFT2980 - 5 2026-07-20
FFT2907 Frontier Airlines 5 2026-05-29
FFT2432 Frontier Airlines 5 2026-07-20
FFT2265 Frontier Airlines 5 2026-04-24
FFT2013 Frontier Airlines 5 2026-07-21
FFT1823 - 5 2026-07-18
FFT1165 Frontier Airlines 5 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT4473 ATL → STL Jul 26, 21:05 UTCJul 26, 22:15 UTC1h 10m
2026-07-26 FFT2144 LAS → PHL Jul 26, 17:20 UTCJul 26, 18:40 UTC1h 20m
2026-07-26 FFT2779 PHX → SNA Jul 26, 14:40 UTCJul 26, 16:15 UTC1h 35m
2026-07-26 FFT2292 MDW → ATL Jul 26, 11:10 UTCJul 26, 12:35 UTC1h 25m
2026-07-26 FFT2291 ATL → MDW Jul 26, 02:50 UTCJul 26, 04:20 UTC1h 30m
2026-07-25 FFT1123 FLL → ATL Jul 25, 22:50 UTCJul 26, 00:50 UTC2h 0m
2026-07-25 FFT3014 ATL → TPA Jul 25, 19:20 UTCJul 25, 20:50 UTC1h 30m
2026-07-25 FFT1116 LAS → ATL Jul 25, 14:00 UTCJul 25, 17:40 UTC3h 40m
2026-07-25 FFT1326 SAN → LAS Jul 25, 05:10 UTCJul 25, 06:05 UTC55m
2026-07-25 FFT1469 LAS → SAN Jul 25, 02:30 UTCJul 25, 03:15 UTC45m
2026-07-25 FFT1469 LAS → SAN Jul 25, 02:03 UTCJul 25, 03:16 UTC1h 13m
2026-07-24 FFT4505 MCI → LAS Jul 24, 21:50 UTCJul 25, 00:10 UTC2h 20m
2026-07-24 FFT4505 MCI → LAS Jul 24, 21:43 UTCJul 25, 00:09 UTC2h 26m
2026-07-24 FFT4506 LAS → MCI Jul 24, 18:20 UTCJul 24, 20:30 UTC2h 10m
2026-07-24 FFT2801 MCO → DEN Jul 24, 12:30 UTCJul 24, 16:15 UTC3h 45m
2026-07-24 FFT2802 DEN → MCO Jul 24, 07:15 UTCJul 24, 10:55 UTC3h 40m
2026-07-24 FFT1965 IAH → LAS Jul 24, 03:10 UTCJul 24, 05:40 UTC2h 30m
2026-07-23 FFT1966 LAS → IAH Jul 23, 22:10 UTCJul 24, 00:55 UTC2h 45m
2026-07-23 FFT4158 SFO → LAS Jul 23, 19:30 UTCJul 23, 20:40 UTC1h 10m
2026-07-23 FFT1159 ONT → SFO Jul 23, 17:10 UTCJul 23, 18:10 UTC1h 0m
2026-07-23 FFT1283 LAS → ONT Jul 23, 14:10 UTCJul 23, 14:50 UTC40m
2026-07-23 FFT4551 MIA → LAS Jul 23, 02:40 UTCJul 23, 07:05 UTC4h 25m
2026-07-22 FFT3699 CLT → MIA Jul 22, 23:25 UTCJul 23, 00:55 UTC1h 30m
2026-07-22 FFT3075 BWI → CLT Jul 22, 20:55 UTCJul 22, 22:05 UTC1h 10m
2026-07-22 FFT3076 CLT → BWI Jul 22, 17:45 UTCJul 22, 18:40 UTC55m
2026-07-21 FFT9837 MCO → CLT Jul 21, 21:05 UTCJul 21, 22:20 UTC1h 15m
2026-07-21 FFT2013 TTN → MCO Jul 21, 13:30 UTCJul 21, 15:35 UTC2h 5m
2026-07-21 FFT2742 MCO → TTN Jul 21, 10:05 UTCJul 21, 12:15 UTC2h 10m
2026-07-21 FFT2451 CLT → MCO Jul 21, 00:30 UTCJul 21, 01:35 UTC1h 5m
2026-07-20 FFT3133 PHL → RDU Jul 20, 22:00 UTCJul 20, 23:20 UTC1h 20m
2026-07-20 FFT2432 TPA → CLE Jul 20, 17:45 UTCJul 20, 20:15 UTC2h 30m
2026-07-20 FFT2867 - Jul 20, 13:15 UTCJul 20, 15:50 UTC2h 35m
2026-07-20 FFT3506 MCO → SJU Jul 20, 11:15 UTCJul 20, 11:35 UTC20m
2026-07-20 FFT3506 MCO → SJU Jul 20, 09:05 UTCJul 20, 09:40 UTC35m
2026-07-20 FFT1351 - Jul 20, 02:00 UTCJul 20, 04:05 UTC2h 5m
2026-07-20 FFT2980 - Jul 20, 00:25 UTCJul 20, 00:40 UTC15m
2026-07-19 FFT2980 - Jul 19, 23:30 UTCJul 20, 00:20 UTC50m
2026-07-19 FFT2980 RDU → BUF Jul 19, 23:24 UTCJul 20, 00:40 UTC1h 16m
2026-07-19 FFT1234 MCO → RDU Jul 19, 21:05 UTCJul 19, 22:25 UTC1h 20m
2026-07-19 FFT1097 - Jul 19, 18:25 UTCJul 19, 19:15 UTC50m
2026-07-19 FFT1098 MCO → BQN Jul 19, 12:55 UTCJul 19, 13:35 UTC40m
2026-07-19 FFT1098 MCO → BQN Jul 19, 12:23 UTCJul 19, 15:14 UTC2h 51m
2026-07-19 FFT1745 - Jul 19, 02:30 UTCJul 19, 03:20 UTC50m
2026-07-19 FFT1745 - Jul 19, 00:50 UTCJul 19, 01:00 UTC10m
2026-07-19 FFT1745 SJU → MCO Jul 19, 00:50 UTCJul 19, 03:20 UTC2h 30m
2026-07-18 FFT1746 - Jul 18, 22:55 UTCJul 18, 23:15 UTC20m
2026-07-18 FFT1746 - Jul 18, 20:45 UTCJul 18, 21:20 UTC35m
2026-07-18 FFT4725 - Jul 18, 16:15 UTCJul 18, 18:50 UTC2h 35m
2026-07-18 FFT2250 ATL → BDL Jul 18, 14:35 UTCJul 18, 14:55 UTC20m
2026-07-18 FFT2250 ATL → BDL Jul 18, 12:20 UTCJul 18, 13:05 UTC45m

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 N437FR page for operator, model, and routing details .

Mode-S A53DAC frequently asked

What is Mode-S code A53DAC?
A53DAC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N437FR.
Where is Mode-S A53DAC registered?
Mode-S code A53DAC 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 A53DAC broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A53DAC, octal 51236654, decimal 10,829,228.
What flights does A53DAC operate?
Mode-S A53DAC has broadcast 20 distinct callsigns, including FFT1746, FFT3377, FFT2284, FFT1016, FFT3506.