Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A52B19

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N432FR · AIRBUS A-320neo · operated by FRONTIER AIRLINES INC.

Hex
A52B19
Octal
51225431
Decimal
10,824,473
Country
US
Tail
N432FR
Type
A20N
Transponder active on ground
Flights observed
569
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A52B19.

Country allocation

The ICAO 24-bit address A52B19 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
FFT90 - 15 2026-07-18
FFT91 Frontier Airlines 14 2026-07-18
FFT1203 - 12 2026-07-17
FFT3985 - 10 2026-07-19
FFT1204 Frontier Airlines 10 2026-07-18
FFT3054 Frontier Airlines 8 2026-04-22
FFT1689 Frontier Airlines 8 2026-04-20
FFT3072 - 7 2026-06-28
FFT3053 Frontier Airlines 7 2026-04-22
FFT2184 Frontier Airlines 7 2026-04-20
FFT1746 - 7 2026-06-18
FFT1690 Frontier Airlines 7 2026-04-20
FFT4082 Frontier Airlines 6 2026-07-06
FFT2683 Frontier Airlines 6 2026-04-20
FFT4726 Frontier Airlines 5 2026-05-30
FFT4602 - 5 2026-07-07
FFT4420 Frontier Airlines 5 2026-05-18
FFT3071 - 5 2026-06-28
FFT4725 Frontier Airlines 4 2026-05-21
FFT3306 Frontier Airlines 4 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT3406 SEA → DEN Jul 26, 19:50 UTCJul 26, 22:15 UTC2h 25m
2026-07-26 FFT1175 PHL → MCO Jul 26, 15:20 UTCJul 26, 17:55 UTC2h 35m
2026-07-26 FFT3229 IAH → DEN Jul 26, 11:40 UTCJul 26, 13:30 UTC1h 50m
2026-07-26 FFT2996 DEN → IAH Jul 26, 03:25 UTCJul 26, 05:15 UTC1h 50m
2026-07-26 FFT4418 ELP → DEN Jul 26, 00:30 UTCJul 26, 01:55 UTC1h 25m
2026-07-25 FFT2261 DEN → ELP Jul 25, 21:35 UTCJul 25, 22:35 UTC1h 0m
2026-07-25 FFT2908 ONT → DEN Jul 25, 18:05 UTCJul 25, 19:55 UTC1h 50m
2026-07-25 FFT2907 DEN → ONT Jul 25, 14:50 UTCJul 25, 16:45 UTC1h 55m
2026-07-25 FFT3220 SLC → DEN Jul 25, 12:15 UTCJul 25, 13:10 UTC55m
2026-07-25 FFT4251 DEN → SLC Jul 25, 05:45 UTCJul 25, 06:45 UTC1h 0m
2026-07-25 FFT4069 DFW → DEN Jul 25, 02:50 UTCJul 25, 04:25 UTC1h 35m
2026-07-24 FFT2148 DEN → DFW Jul 24, 23:30 UTCJul 25, 01:00 UTC1h 30m
2026-07-24 FFT1863 OKC → DEN Jul 24, 20:50 UTCJul 24, 22:05 UTC1h 15m
2026-07-24 FFT1928 DEN → OKC Jul 24, 18:30 UTCJul 24, 19:40 UTC1h 10m
2026-07-24 FFT4768 PHX → DEN Jul 24, 15:55 UTCJul 24, 17:15 UTC1h 20m
2026-07-24 FFT4753 DEN → PHX Jul 24, 04:55 UTCJul 24, 06:15 UTC1h 20m
2026-07-24 FFT4753 DEN → PHX Jul 24, 04:49 UTCJul 24, 06:19 UTC1h 30m
2026-07-24 FFT1820 PHX → DEN Jul 24, 02:00 UTCJul 24, 03:25 UTC1h 25m
2026-07-24 FFT1820 PHX → DEN Jul 24, 02:06 UTCJul 24, 03:20 UTC1h 14m
2026-07-23 FFT4578 SAN → PHX Jul 23, 23:55 UTCJul 24, 00:50 UTC55m
2026-07-23 FFT1571 PHX → SAN Jul 23, 21:55 UTCJul 23, 22:45 UTC50m
2026-07-23 FFT3871 SLC → PHX Jul 23, 18:45 UTCJul 23, 20:00 UTC1h 15m
2026-07-23 FFT3872 PHX → SLC Jul 23, 16:25 UTCJul 23, 17:40 UTC1h 15m
2026-07-23 FFT1747 PHL → MSY Jul 23, 13:05 UTCJul 23, 14:30 UTC1h 25m
2026-07-23 FFT2347 PHL → PBI Jul 23, 03:25 UTCJul 23, 05:50 UTC2h 25m
2026-07-22 FFT2348 PBI → PHL Jul 22, 21:40 UTCJul 22, 23:35 UTC1h 55m
2026-07-22 FFT2348 PBI → PHL Jul 22, 21:48 UTCJul 22, 23:35 UTC1h 47m
2026-07-22 FFT3565 DTW → DEN Jul 22, 17:30 UTCJul 22, 20:15 UTC2h 45m
2026-07-22 FFT3566 DEN → DTW Jul 22, 13:55 UTCJul 22, 16:10 UTC2h 15m
2026-07-21 FFT689 DCA → DEN Jul 21, 22:45 UTCJul 22, 02:20 UTC3h 35m
2026-07-21 FFT689 DCA → DEN Jul 21, 22:14 UTCJul 22, 02:14 UTC4h 0m
2026-07-21 FFT688 DEN → DCA Jul 21, 18:25 UTCJul 21, 21:20 UTC2h 55m
2026-07-21 FFT3156 LAX → DEN Jul 21, 13:45 UTCJul 21, 15:40 UTC1h 55m
2026-07-21 FFT4345 - Jul 21, 04:55 UTCJul 21, 06:40 UTC1h 45m
2026-07-21 FFT4345 DEN → LAX Jul 21, 04:52 UTCJul 21, 06:39 UTC1h 47m
2026-07-21 FFT4625 AWM → DEN Jul 21, 01:25 UTCJul 21, 03:15 UTC1h 50m
2026-07-20 FFT4626 DEN → MEM Jul 20, 22:20 UTCJul 21, 00:10 UTC1h 49m
2026-07-20 FFT4626 DEN → MEM Jul 20, 21:56 UTCJul 21, 00:08 UTC2h 12m
2026-07-20 FFT1113 TPA → DEN Jul 20, 17:27 UTCJul 20, 20:39 UTC3h 12m
2026-07-20 FFT1113 TPA → DEN Jul 20, 17:25 UTCJul 20, 20:40 UTC3h 15m
2026-07-20 FFT2748 DEN → TPA Jul 20, 12:20 UTCJul 20, 15:35 UTC3h 15m
2026-07-20 FFT4346 LAX → DEN Jul 20, 00:50 UTCJul 20, 02:50 UTC2h 0m
2026-07-19 FFT2341 RDU → ATL Jul 19, 21:40 UTCJul 19, 23:30 UTC1h 50m
2026-07-19 FFT3565 DTW → DEN Jul 19, 17:55 UTCJul 19, 20:25 UTC2h 30m
2026-07-19 FFT3566 DEN → DTW Jul 19, 13:55 UTCJul 19, 16:15 UTC2h 20m
2026-07-19 FFT2147 DFW → DEN Jul 19, 10:30 UTCJul 19, 12:00 UTC1h 30m
2026-07-19 FFT3985 PSQ → DFW Jul 19, 04:25 UTCJul 19, 07:15 UTC2h 50m
2026-07-19 FFT3985 - Jul 19, 04:00 UTCJul 19, 04:05 UTC5m
2026-07-19 FFT3985 - Jul 19, 03:35 UTCJul 19, 03:45 UTC10m
2026-07-19 FFT3985 - Jul 19, 03:10 UTCJul 19, 03:15 UTC5m

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 N432FR page for operator, model, and routing details .

Mode-S A52B19 frequently asked

What is Mode-S code A52B19?
A52B19 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N432FR.
Where is Mode-S A52B19 registered?
Mode-S code A52B19 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 A52B19 broadcasting right now?
Mode-S A52B19 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A52B19, octal 51225431, decimal 10,824,473.
What flights does A52B19 operate?
Mode-S A52B19 has broadcast 20 distinct callsigns, including FFT90, FFT91, FFT1203, FFT3985, FFT1204.