Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A406C9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N359FR · AIRBUS A-320neo · operated by UMB BANK NA TRUSTEE

Hex
A406C9
Octal
51003311
Decimal
10,749,641
Country
US
Tail
N359FR
Type
A20N
Broadcasting now · callsign FFT2631 · 12,750 ft
Flights observed
485
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A406C9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A406C9 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
FFT4726 - 8 2026-07-02
FFT4108 Frontier Airlines 4 2026-06-04
FFT4107 Frontier Airlines 4 2026-06-04
FFT4076 - 4 2026-06-23
FFT3454 - 4 2026-06-23
FFT3442 Frontier Airlines 4 2026-05-27
FFT3294 Frontier Airlines 4 2026-07-24
FFT3293 Frontier Airlines 4 2026-07-24
FFT2996 - 4 2026-06-16
FFT2908 Frontier Airlines 4 2026-06-18
FFT2907 - 4 2026-06-18
FFT2890 Frontier Airlines 4 2026-07-23
FFT2399 - 4 2026-06-23
FFT2261 Frontier Airlines 4 2026-06-15
FFT1820 Frontier Airlines 4 2026-07-22
FFT1482 - 4 2026-07-04
FFT9359 - 3 2026-07-13
FFT4964 Frontier Airlines 3 2026-06-09
FFT4946 - 3 2026-07-18
FFT4602 - 3 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 FFT4070 DEN → DFW Jul 24, 21:00 UTCJul 24, 22:30 UTC1h 30m
2026-07-24 FFT3293 ATL → DEN Jul 24, 17:05 UTCJul 24, 19:45 UTC2h 40m
2026-07-24 FFT3294 DEN → ATL Jul 24, 12:35 UTCJul 24, 15:15 UTC2h 40m
2026-07-24 FFT1149 MSP → DEN Jul 24, 03:29 UTCJul 24, 04:51 UTC1h 22m
2026-07-24 FFT1149 MSP → DEN Jul 24, 03:15 UTCJul 24, 04:55 UTC1h 40m
2026-07-24 FFT1292 DEN → MSP Jul 24, 00:30 UTCJul 24, 02:00 UTC1h 30m
2026-07-23 FFT3406 SEA → DEN Jul 23, 19:50 UTCJul 23, 22:05 UTC2h 15m
2026-07-23 FFT1175 PHL → MCO Jul 23, 15:35 UTCJul 23, 18:05 UTC2h 30m
2026-07-23 FFT1815 AUS → DEN Jul 23, 11:35 UTCJul 23, 13:20 UTC1h 45m
2026-07-23 FFT2890 LAS → TPA Jul 23, 06:05 UTCJul 23, 07:45 UTC1h 40m
2026-07-23 FFT1927 OKC → DEN Jul 23, 02:00 UTCJul 23, 03:15 UTC1h 15m
2026-07-23 FFT1927 OKC → DEN Jul 23, 01:54 UTCJul 23, 03:42 UTC1h 48m
2026-07-22 FFT1928 DEN → OKC Jul 22, 22:15 UTCJul 22, 23:25 UTC1h 10m
2026-07-22 FFT3375 MCI → DEN Jul 22, 18:50 UTCJul 22, 20:20 UTC1h 30m
2026-07-22 FFT4828 DEN → MCI Jul 22, 16:30 UTCJul 22, 17:45 UTC1h 15m
2026-07-22 FFT1500 ONT → DEN Jul 22, 13:10 UTCJul 22, 14:55 UTC1h 45m
2026-07-22 FFT1820 PHX → DEN Jul 22, 03:10 UTCJul 22, 04:55 UTC1h 45m
2026-07-22 FFT1820 PHX → DEN Jul 22, 02:43 UTCJul 22, 04:49 UTC2h 6m
2026-07-21 FFT1820 PHX → DEN Jul 21, 23:30 UTCJul 22, 00:25 UTC55m
2026-07-21 FFT1571 PHX → SAN Jul 21, 21:30 UTCJul 21, 22:20 UTC50m
2026-07-21 FFT3871 - Jul 21, 18:45 UTCJul 21, 20:00 UTC1h 15m
2026-07-21 FFT3872 - Jul 21, 16:30 UTCJul 21, 17:45 UTC1h 15m
2026-07-21 FFT4753 DEN → PHX Jul 21, 07:05 UTCJul 21, 08:30 UTC1h 25m
2026-07-21 FFT4069 DFW → DEN Jul 21, 02:50 UTCJul 21, 04:15 UTC1h 25m
2026-07-20 FFT2148 DEN → DFW Jul 20, 23:35 UTCJul 21, 01:05 UTC1h 29m
2026-07-20 FFT1863 OKC → DEN Jul 20, 20:50 UTCJul 20, 22:00 UTC1h 10m
2026-07-20 FFT1928 DEN → OKC Jul 20, 18:40 UTCJul 20, 19:50 UTC1h 10m
2026-07-20 FFT4768 - Jul 20, 15:55 UTCJul 20, 17:20 UTC1h 25m
2026-07-20 FFT2638 SFO → PHX Jul 20, 02:45 UTCJul 20, 04:20 UTC1h 35m
2026-07-19 FFT3393 SLC → SFO Jul 19, 23:55 UTCJul 20, 01:30 UTC1h 35m
2026-07-19 FFT2526 PHX → SLC Jul 19, 21:20 UTCJul 19, 22:30 UTC1h 10m
2026-07-19 FFT3971 DFW → PHX Jul 19, 17:05 UTCJul 19, 19:00 UTC1h 55m
2026-07-19 FFT2532 PHX → DFW Jul 19, 13:25 UTCJul 19, 15:30 UTC2h 5m
2026-07-19 FFT4753 DEN → PHX Jul 19, 04:50 UTCJul 19, 06:15 UTC1h 25m
2026-07-19 FFT3725 - Jul 19, 00:35 UTCJul 19, 02:55 UTC2h 20m
2026-07-18 FFT3286 DEN → CVG Jul 18, 20:55 UTCJul 18, 23:20 UTC2h 25m
2026-07-18 FFT4639 - Jul 18, 16:00 UTCJul 18, 18:35 UTC2h 35m
2026-07-18 FFT1918 DEN → CLE Jul 18, 12:10 UTCJul 18, 14:50 UTC2h 40m
2026-07-18 FFT4946 - Jul 18, 04:30 UTCJul 18, 06:30 UTC2h 0m
2026-07-18 FFT4500 PDX → LAX Jul 18, 01:10 UTCJul 18, 03:15 UTC2h 6m
2026-07-17 FFT2553 DEN → PDX Jul 17, 21:39 UTCJul 17, 23:50 UTC2h 10m
2026-07-17 FFT3565 DTW → DEN Jul 17, 17:35 UTCJul 17, 20:00 UTC2h 25m
2026-07-17 FFT3566 DEN → DTW Jul 17, 13:50 UTCJul 17, 16:19 UTC2h 30m
2026-07-17 FFT3566 DEN → DTW Jul 17, 13:54 UTCJul 17, 16:14 UTC2h 20m
2026-07-17 FFT2147 DFW → DEN Jul 17, 10:50 UTCJul 17, 12:19 UTC1h 30m
2026-07-16 FFT4559 IAD → DFW Jul 16, 23:59 UTCJul 17, 02:34 UTC2h 35m
2026-07-16 FFT3208 DFW → IAD Jul 16, 20:05 UTCJul 16, 22:40 UTC2h 35m
2026-07-16 FFT3177 - Jul 16, 14:55 UTCJul 16, 17:05 UTC2h 10m
2026-07-16 FFT3177 DTW → DFW Jul 16, 14:48 UTCJul 16, 17:00 UTC2h 12m
2026-07-16 FFT3178 DFW → DTW Jul 16, 11:15 UTCJul 16, 13:19 UTC2h 4m

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 N359FR page for operator, model, and routing details .

Mode-S A406C9 frequently asked

What is Mode-S code A406C9?
A406C9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N359FR.
Where is Mode-S A406C9 registered?
Mode-S code A406C9 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 A406C9 broadcasting right now?
Yes. Mode-S A406C9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A406C9, octal 51003311, decimal 10,749,641.
What flights does A406C9 operate?
Mode-S A406C9 has broadcast 20 distinct callsigns, including FFT4726, FFT4108, FFT4107, FFT4076, FFT3454.