Apparatus

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sensors Mode-S transponder

A43F7D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N373FR · AIRBUS A-320neo · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A43F7D
Octal
51037575
Decimal
10,764,157
Country
US
Tail
N373FR
Type
A20N
Broadcasting now · callsign FFT1247 · 26,150 ft
Flights observed
215
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A43F7D is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A43F7D 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
FFT3288 Frontier Airlines 5 2026-04-23
FFT1888 Frontier Airlines 4 2026-05-19
FFT1887 Frontier Airlines 4 2026-05-19
FFT9473 Frontier Airlines 3 2026-05-16
FFT3971 Frontier Airlines 3 2026-05-20
FFT3311 Frontier Airlines 3 2026-04-18
FFT3287 Frontier Airlines 3 2026-04-23
FFT1735 Frontier Airlines 3 2026-05-04
FFT1061 Frontier Airlines 3 2026-05-01
FFT690 Frontier Airlines 2 2026-05-27
FFT685 Frontier Airlines 2 2026-05-28
FFT4989 Frontier Airlines 2 2026-05-26
FFT4964 Frontier Airlines 2 2026-05-20
FFT4762 - 2 2026-04-13
FFT4726 Frontier Airlines 2 2026-05-19
FFT4639 Frontier Airlines 2 2026-05-23
FFT4612 Frontier Airlines 2 2026-05-12
FFT4474 Frontier Airlines 2 2026-04-23
FFT4369 Frontier Airlines 2 2026-05-23
FFT4286 - 2 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 FFT1248 DEN → GRR May 29, 21:45 UTCMay 29, 23:15 UTC1h 30m
2026-05-29 FFT3293 ATL → DEN May 29, 17:00 UTCMay 29, 19:40 UTC2h 40m
2026-05-29 FFT3294 DEN → ATL May 29, 12:35 UTCMay 29, 15:05 UTC2h 30m
2026-05-29 FFT4069 DFW → DEN May 29, 03:40 UTCMay 29, 05:15 UTC1h 35m
2026-05-28 FFT1973 FLL → DFW May 28, 23:35 UTCMay 29, 02:15 UTC2h 40m
2026-05-28 FFT1974 DFW → FLL May 28, 19:30 UTCMay 28, 22:05 UTC2h 35m
2026-05-28 FFT3366 DEN → DFW May 28, 16:15 UTCMay 28, 17:40 UTC1h 25m
2026-05-28 FFT685 DCA → DEN May 28, 11:15 UTCMay 28, 14:40 UTC3h 25m
2026-05-27 FFT690 DEN → DCA May 27, 23:40 UTCMay 28, 02:25 UTC2h 45m
2026-05-27 FFT3375 MCI → DEN May 27, 19:55 UTCMay 27, 21:30 UTC1h 35m
2026-05-27 FFT3376 DEN → MCI May 27, 17:15 UTCMay 27, 18:30 UTC1h 15m
2026-05-27 FFT3862 SLC → DEN May 27, 15:15 UTCMay 27, 16:25 UTC1h 10m
2026-05-27 FFT3862 SLC → DEN May 27, 14:35 UTCMay 27, 16:20 UTC1h 45m
2026-05-27 FFT3219 PHL → FLL May 27, 12:05 UTCMay 27, 13:10 UTC1h 5m
2026-05-26 FFT689 DCA → DEN May 26, 22:20 UTCMay 27, 01:34 UTC3h 15m
2026-05-26 FFT688 DEN → DCA May 26, 17:39 UTCMay 26, 20:40 UTC3h 0m
2026-05-26 FFT2818 SAN → DEN May 26, 14:05 UTCMay 26, 16:00 UTC1h 55m
2026-05-26 FFT4989 DEN → SAN May 26, 04:50 UTCMay 26, 06:39 UTC1h 50m
2026-05-26 FFT4989 DEN → SAN May 26, 04:42 UTCMay 26, 06:39 UTC1h 57m
2026-05-26 FFT4567 STL → DEN May 26, 01:14 UTCMay 26, 03:05 UTC1h 50m
2026-05-25 FFT3302 DEN → STL May 25, 22:34 UTCMay 26, 00:09 UTC1h 35m
2026-05-25 FFT1677 DSM → DEN May 25, 19:30 UTCMay 25, 20:55 UTC1h 25m
2026-05-25 FFT1678 RDU → SYR May 25, 17:00 UTCMay 25, 18:20 UTC1h 20m
2026-05-25 FFT1230 MCO → GRB May 25, 13:20 UTCMay 25, 15:35 UTC2h 15m
2026-05-25 FFT3439 DEN → SFO May 25, 05:50 UTCMay 25, 08:00 UTC2h 10m
2026-05-25 FFT4061 MSN → DEN May 25, 02:35 UTCMay 25, 04:35 UTC2h 0m
2026-05-24 FFT1560 DEN → MSN May 24, 23:00 UTCMay 24, 23:46 UTC46m
2026-05-24 FFT2443 PNS → DEN May 24, 00:40 UTCMay 24, 03:15 UTC2h 35m
2026-05-23 FFT3930 DEN → PNS May 23, 20:50 UTCMay 23, 23:20 UTC2h 30m
2026-05-23 FFT4639 CLE → DEN May 23, 16:10 UTCMay 23, 18:55 UTC2h 45m
2026-05-23 FFT1918 DEN → CLE May 23, 12:15 UTCMay 23, 14:45 UTC2h 30m
2026-05-23 FFT4369 TYS → DEN May 23, 00:15 UTCMay 23, 02:45 UTC2h 29m
2026-05-23 FFT4369 TYS → DEN May 23, 00:28 UTCMay 23, 02:53 UTC2h 25m
2026-05-22 FFT2374 TPA → PHL May 22, 20:45 UTCMay 22, 23:05 UTC2h 20m
2026-05-22 FFT2374 TPA → PHL May 22, 20:50 UTCMay 22, 23:05 UTC2h 15m
2026-05-22 FFT4639 CLE → DEN May 22, 16:15 UTCMay 22, 19:05 UTC2h 50m
2026-05-22 FFT1918 DEN → CLE May 22, 12:15 UTCMay 22, 14:50 UTC2h 35m
2026-05-22 FFT1291 MSP → DEN May 22, 03:15 UTCMay 22, 05:00 UTC1h 45m
2026-05-22 FFT1292 DEN → MSP May 22, 00:30 UTCMay 22, 02:15 UTC1h 45m
2026-05-21 FFT1094 SFO → DEN May 21, 20:35 UTCMay 21, 22:45 UTC2h 10m
2026-05-21 FFT1093 ISP → MCO May 21, 16:35 UTCMay 21, 18:45 UTC2h 10m
2026-05-21 FFT1279 MIA → DEN May 21, 10:45 UTCMay 21, 14:30 UTC3h 45m
2026-05-21 FFT1280 DEN → MIA May 21, 05:45 UTCMay 21, 09:10 UTC3h 25m
2026-05-21 FFT4766 PHX → DEN May 21, 02:15 UTCMay 21, 03:35 UTC1h 20m
2026-05-20 FFT4949 SLC → PHX May 20, 23:35 UTCMay 21, 00:55 UTC1h 20m
2026-05-20 FFT2524 PHX → SLC May 20, 21:15 UTCMay 20, 22:30 UTC1h 15m
2026-05-20 FFT3971 DFW → PHX May 20, 17:50 UTCMay 20, 20:00 UTC2h 10m
2026-05-20 FFT4964 LAX → DFW May 20, 12:55 UTCMay 20, 15:30 UTC2h 35m
2026-05-20 FFT2273 ATL → MSY May 20, 02:25 UTCMay 20, 05:10 UTC2h 46m
2026-05-19 FFT1887 MDW → DFW May 19, 21:40 UTCMay 20, 00:20 UTC2h 40m

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 N373FR page for operator, model, and routing details .

Mode-S A43F7D frequently asked

What is Mode-S code A43F7D?
A43F7D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N373FR.
Where is Mode-S A43F7D registered?
Mode-S code A43F7D 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 A43F7D broadcasting right now?
Yes. Mode-S A43F7D is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A43F7D, octal 51037575, decimal 10,764,157.
What flights does A43F7D operate?
Mode-S A43F7D has broadcast 20 distinct callsigns, including FFT3288, FFT1888, FFT1887, FFT9473, FFT3971.