Apparatus

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sensors Mode-S transponder

A4CE9D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N409FR · AIRBUS A-320neo · operated by FRONTIER AIRLINES INC.

Hex
A4CE9D
Octal
51147235
Decimal
10,800,797
Country
US
Tail
N409FR
Type
A20N
Broadcasting now · callsign FFT3990 · 32,975 ft
Flights observed
568
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:55 UTC

Current position

A4CE9D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A4CE9D 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
FFT1165 Frontier Airlines 18 2026-06-26
FFT4420 Frontier Airlines 16 2026-05-30
FFT4419 Frontier Airlines 15 2026-05-30
FFT2695 - 14 2026-06-28
FFT241 Frontier Airlines 13 2026-05-30
FFT1726 - 13 2026-06-28
FFT3306 - 9 2026-06-24
FFT240 - 9 2026-05-30
FFT4916 Frontier Airlines 8 2026-05-10
FFT4915 Frontier Airlines 8 2026-05-10
FFT3003 - 7 2026-06-27
FFT1016 Frontier Airlines 7 2026-04-21
FFT3305 - 6 2026-06-24
FFT3054 Frontier Airlines 6 2026-06-09
FFT3053 Frontier Airlines 6 2026-06-08
FFT2981 - 6 2026-06-28
FFT2250 - 6 2026-06-26
FFT4462 - 5 2026-06-27
FFT1824 - 5 2026-07-13
FFT1746 - 5 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT3559 MCO → BNA Jul 26, 19:15 UTCJul 26, 20:50 UTC1h 35m
2026-07-26 FFT4685 PSE → MCO Jul 26, 14:25 UTCJul 26, 17:00 UTC2h 35m
2026-07-26 FFT4686 MCO → PSE Jul 26, 10:20 UTCJul 26, 11:05 UTC45m
2026-07-26 FFT2280 CLE → MCO Jul 26, 02:00 UTCJul 26, 03:50 UTC1h 50m
2026-07-26 FFT2280 CLE → MCO Jul 26, 01:57 UTCJul 26, 03:48 UTC1h 51m
2026-07-25 FFT1055 MCO → CLE Jul 25, 22:00 UTCJul 26, 00:05 UTC2h 5m
2026-07-25 FFT3312 DEN → MCO Jul 25, 16:55 UTCJul 25, 20:25 UTC3h 30m
2026-07-25 FFT1376 PHX → DEN Jul 25, 13:53 UTCJul 25, 15:09 UTC1h 16m
2026-07-25 FFT1376 PHX → DEN Jul 25, 13:50 UTCJul 25, 15:10 UTC1h 20m
2026-07-25 FFT4765 DEN → PHX Jul 25, 03:15 UTCJul 25, 04:35 UTC1h 20m
2026-07-25 FFT2142 LAS → PHL Jul 25, 00:20 UTCJul 25, 01:55 UTC1h 35m
2026-07-24 FFT1720 SNA → PHX Jul 24, 22:00 UTCJul 24, 23:00 UTC1h 0m
2026-07-24 FFT4957 PHX → SNA Jul 24, 19:30 UTCJul 24, 20:25 UTC55m
2026-07-24 FFT2141 PHL → LAS Jul 24, 15:20 UTCJul 24, 16:45 UTC1h 25m
2026-07-24 FFT1733 CVG → PHX Jul 24, 09:50 UTCJul 24, 13:15 UTC3h 25m
2026-07-23 FFT4662 PNS → MCO Jul 23, 21:48 UTCJul 23, 22:44 UTC56m
2026-07-23 FFT4661 MCO → PNS Jul 23, 19:30 UTCJul 23, 20:35 UTC1h 5m
2026-07-23 FFT2834 - Jul 23, 16:00 UTCJul 23, 18:10 UTC2h 10m
2026-07-23 FFT2833 MCO → MKE Jul 23, 12:30 UTCJul 23, 14:55 UTC2h 25m
2026-07-23 FFT9509 TPA → MCO Jul 23, 10:55 UTCJul 23, 11:20 UTC25m
2026-07-23 FFT1258 LAS → TPA Jul 23, 05:35 UTCJul 23, 09:30 UTC3h 55m
2026-07-23 FFT1196 BUR → LAS Jul 23, 01:05 UTCJul 23, 01:50 UTC45m
2026-07-23 FFT1196 BUR → LAS Jul 23, 01:13 UTCJul 23, 01:41 UTC28m
2026-07-22 FFT1195 MCO → SAN Jul 22, 23:15 UTCJul 23, 00:00 UTC45m
2026-07-22 FFT4108 BUR → LAS Jul 22, 20:20 UTCJul 22, 21:05 UTC45m
2026-07-22 FFT4107 LAS → BUR Jul 22, 18:05 UTCJul 22, 18:50 UTC45m
2026-07-22 FFT2801 DTW → LAS Jul 22, 12:40 UTCJul 22, 16:30 UTC3h 50m
2026-07-22 FFT2802 DEN → MCO Jul 22, 10:20 UTCJul 22, 11:20 UTC1h 0m
2026-07-22 FFT1965 IAH → LAS Jul 22, 02:30 UTCJul 22, 05:00 UTC2h 30m
2026-07-21 FFT1966 LAS → IAH Jul 21, 22:05 UTCJul 22, 00:55 UTC2h 50m
2026-07-21 FFT3292 LAX → LAS Jul 21, 19:50 UTCJul 21, 20:30 UTC40m
2026-07-21 FFT4129 SLC → LAX Jul 21, 17:10 UTCJul 21, 18:40 UTC1h 30m
2026-07-21 FFT4129 SLC → LAX Jul 21, 17:17 UTCJul 21, 18:36 UTC1h 19m
2026-07-21 FFT3016 LAS → SLC Jul 21, 15:05 UTCJul 21, 16:10 UTC1h 5m
2026-07-21 FFT4551 MIA → LAS Jul 21, 02:30 UTCJul 21, 06:45 UTC4h 15m
2026-07-20 FFT3699 CLT → MIA Jul 20, 23:40 UTCJul 21, 01:15 UTC1h 35m
2026-07-20 FFT3075 BWI → CLT Jul 20, 20:25 UTCJul 20, 21:25 UTC1h 0m
2026-07-20 FFT3076 - Jul 20, 18:00 UTCJul 20, 19:00 UTC1h 0m
2026-07-20 FFT2396 - Jul 20, 14:20 UTCJul 20, 16:25 UTC2h 5m
2026-07-20 FFT1067 - Jul 20, 10:50 UTCJul 20, 13:05 UTC2h 15m
2026-07-20 FFT3442 ATL → MIA Jul 20, 03:01 UTCJul 20, 04:33 UTC1h 32m
2026-07-20 FFT3442 - Jul 20, 03:05 UTCJul 20, 04:35 UTC1h 30m
2026-07-19 FFT4405 HWO → ATL Jul 19, 23:15 UTCJul 20, 00:30 UTC1h 15m
2026-07-19 FFT4405 MIA → ATL Jul 19, 22:40 UTCJul 20, 00:30 UTC1h 50m
2026-07-19 FFT2272 ATL → MIA Jul 19, 20:00 UTCJul 19, 21:35 UTC1h 35m
2026-07-19 FFT3059 - Jul 19, 15:35 UTCJul 19, 16:55 UTC1h 20m
2026-07-19 FFT3377 SJU → MIA Jul 19, 11:40 UTCJul 19, 14:00 UTC2h 20m
2026-07-19 FFT2220 DFW → SJU Jul 19, 09:30 UTCJul 19, 09:45 UTC15m
2026-07-19 FFT2220 DFW → SJU Jul 19, 05:00 UTCJul 19, 07:50 UTC2h 50m
2026-07-18 FFT3175 DTW → DFW Jul 18, 23:50 UTCJul 19, 02:05 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 N409FR page for operator, model, and routing details .

Mode-S A4CE9D frequently asked

What is Mode-S code A4CE9D?
A4CE9D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N409FR.
Where is Mode-S A4CE9D registered?
Mode-S code A4CE9D 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 A4CE9D broadcasting right now?
Yes. Mode-S A4CE9D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4CE9D, octal 51147235, decimal 10,800,797.
What flights does A4CE9D operate?
Mode-S A4CE9D has broadcast 20 distinct callsigns, including FFT1165, FFT4420, FFT4419, FFT2695, FFT241.