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sensors Mode-S transponder

A54163

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N438FR · AIRBUS A-320neo · operated by FRONTIER AIRLINES INC.

Hex
A54163
Octal
51240543
Decimal
10,830,179
Country
US
Tail
N438FR
Type
A20N
Transponder active on ground
Flights observed
479
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A54163.

Country allocation

The ICAO 24-bit address A54163 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
FFT3092 Frontier Airlines 14 2026-05-05
FFT3091 Frontier Airlines 14 2026-05-05
FFT2338 Frontier Airlines 12 2026-05-04
FFT2715 Frontier Airlines 11 2026-05-04
FFT4117 Frontier Airlines 10 2026-05-04
FFT4118 Frontier Airlines 9 2026-05-04
FFT3985 Frontier Airlines 9 2026-05-31
FFT1261 - 9 2026-07-09
FFT3175 Frontier Airlines 8 2026-05-31
FFT2970 Frontier Airlines 8 2026-05-31
FFT1500 - 8 2026-07-09
FFT4828 Frontier Airlines 7 2026-07-09
FFT3990 Frontier Airlines 7 2026-05-31
FFT3302 - 7 2026-07-07
FFT4567 - 6 2026-07-08
FFT2513 Frontier Airlines 6 2026-07-07
FFT3375 - 5 2026-07-09
FFT2514 Frontier Airlines 5 2026-07-07
FFT2284 Frontier Airlines 5 2026-05-11
FFT1863 - 5 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFT4989 DEN → SAN Jul 14, 04:55 UTCJul 14, 06:50 UTC1h 55m
2026-07-14 FFT4625 - Jul 14, 01:05 UTCJul 14, 02:55 UTC1h 50m
2026-07-13 FFT4626 - Jul 13, 22:00 UTCJul 13, 23:55 UTC1h 55m
2026-07-13 FFT1113 TPA → DEN Jul 13, 17:10 UTCJul 13, 20:25 UTC3h 15m
2026-07-13 FFT1113 TPA → DEN Jul 13, 16:51 UTCJul 13, 20:24 UTC3h 33m
2026-07-13 FFT2748 - Jul 13, 12:05 UTCJul 13, 15:25 UTC3h 20m
2026-07-13 FFT3440 SFO → DEN Jul 13, 05:15 UTCJul 13, 07:20 UTC2h 5m
2026-07-13 FFT1093 DEN → SFO Jul 13, 01:20 UTCJul 13, 03:30 UTC2h 10m
2026-07-13 FFT1093 DEN → SFO Jul 13, 01:11 UTCJul 13, 03:30 UTC2h 19m
2026-07-12 FFT1597 - Jul 12, 21:05 UTCJul 12, 23:10 UTC2h 5m
2026-07-12 FFT1598 - Jul 12, 17:15 UTCJul 12, 19:20 UTC2h 5m
2026-07-12 FFT1230 SFO → DEN Jul 12, 13:13 UTCJul 12, 15:09 UTC1h 56m
2026-07-12 FFT1230 SFO → DEN Jul 12, 13:05 UTCJul 12, 15:10 UTC2h 5m
2026-07-12 FFT3439 DEN → SFO Jul 12, 04:45 UTCJul 12, 06:55 UTC2h 10m
2026-07-12 FFT3439 DEN → SFO Jul 12, 04:42 UTCJul 12, 06:50 UTC2h 8m
2026-07-11 FFT3982 SLC → DEN Jul 11, 21:55 UTCJul 11, 22:50 UTC55m
2026-07-11 FFT3981 DEN → SLC Jul 11, 19:20 UTCJul 11, 20:15 UTC55m
2026-07-11 FFT2818 - Jul 11, 13:40 UTCJul 11, 15:35 UTC1h 55m
2026-07-11 FFT4989 DEN → SAN Jul 11, 04:40 UTCJul 11, 06:45 UTC2h 5m
2026-07-11 FFT2347 - Jul 11, 00:50 UTCJul 11, 03:10 UTC2h 20m
2026-07-10 FFT2348 DEN → IND Jul 10, 21:40 UTCJul 10, 23:45 UTC2h 5m
2026-07-10 FFT3565 - Jul 10, 17:35 UTCJul 10, 20:05 UTC2h 30m
2026-07-10 FFT3566 - Jul 10, 13:50 UTCJul 10, 16:05 UTC2h 15m
2026-07-10 FFT1859 AUS → DEN Jul 10, 02:20 UTCJul 10, 04:35 UTC2h 15m
2026-07-09 FFT1816 DEN → AUS Jul 9, 23:10 UTCJul 10, 01:00 UTC1h 50m
2026-07-09 FFT3375 - Jul 9, 18:55 UTCJul 9, 20:15 UTC1h 20m
2026-07-09 FFT4828 DEN → MCI Jul 9, 16:30 UTCJul 9, 17:40 UTC1h 10m
2026-07-09 FFT1500 ONT → DEN Jul 9, 13:00 UTCJul 9, 14:50 UTC1h 50m
2026-07-09 FFT1261 - Jul 9, 06:40 UTCJul 9, 08:35 UTC1h 55m
2026-07-09 FFT2347 IND → DEN Jul 9, 02:35 UTCJul 9, 05:05 UTC2h 30m
2026-07-08 FFT2348 - Jul 8, 23:15 UTCJul 9, 01:25 UTC2h 10m
2026-07-08 FFT3375 - Jul 8, 18:55 UTCJul 8, 20:20 UTC1h 25m
2026-07-08 FFT4828 DEN → MCI Jul 8, 16:25 UTCJul 8, 17:35 UTC1h 10m
2026-07-08 FFT4828 DEN → MCI Jul 8, 16:29 UTCJul 8, 17:38 UTC1h 9m
2026-07-08 FFT1500 - Jul 8, 13:10 UTCJul 8, 14:55 UTC1h 45m
2026-07-08 FFT1261 DEN → ONT Jul 8, 05:10 UTCJul 8, 07:00 UTC1h 50m
2026-07-08 FFT4567 STL → DEN Jul 8, 01:50 UTCJul 8, 03:40 UTC1h 50m
2026-07-07 FFT3302 DEN → STL Jul 7, 22:40 UTCJul 8, 00:35 UTC1h 55m
2026-07-07 FFT2513 GRR → TPA Jul 7, 16:50 UTCJul 7, 20:10 UTC3h 20m
2026-07-07 FFT2514 DEN → PHL Jul 7, 12:15 UTCJul 7, 15:20 UTC3h 5m
2026-07-07 FFT1127 MIQ → DEN Jul 7, 01:25 UTCJul 7, 02:35 UTC1h 10m
2026-07-07 FFT1127 OMA → DEN Jul 7, 01:11 UTCJul 7, 02:30 UTC1h 19m
2026-07-06 FFT1874 - Jul 6, 23:05 UTCJul 7, 00:05 UTC1h 0m
2026-07-06 FFT687 DCA → DEN Jul 6, 18:20 UTCJul 6, 21:35 UTC3h 15m
2026-07-06 FFT686 DEN → DCA Jul 6, 13:50 UTCJul 6, 16:55 UTC3h 5m
2026-07-06 FFT686 DEN → DCA Jul 6, 13:43 UTCJul 6, 16:50 UTC3h 7m
2026-07-06 FFT1149 MSP → DEN Jul 6, 03:15 UTCJul 6, 04:45 UTC1h 30m
2026-07-06 FFT1292 DEN → MSP Jul 6, 00:45 UTCJul 6, 02:10 UTC1h 25m
2026-07-05 FFT4385 - Jul 5, 20:10 UTCJul 5, 21:40 UTC1h 30m
2026-07-05 FFT4386 - Jul 5, 17:25 UTCJul 5, 19:00 UTC1h 35m

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 N438FR page for operator, model, and routing details .

Mode-S A54163 frequently asked

What is Mode-S code A54163?
A54163 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N438FR.
Where is Mode-S A54163 registered?
Mode-S code A54163 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 A54163 broadcasting right now?
Mode-S A54163 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 A54163, octal 51240543, decimal 10,830,179.
What flights does A54163 operate?
Mode-S A54163 has broadcast 20 distinct callsigns, including FFT3092, FFT3091, FFT2338, FFT2715, FFT4117.