Apparatus

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sensors Mode-S transponder

A37DB9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N324FR · AIRBUS A-320neo · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A37DB9
Octal
50676671
Decimal
10,714,553
Country
US
Tail
N324FR
Type
A20N
Broadcasting now · callsign FFT688 · 9,525 ft
Flights observed
579
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:10 UTC

Current position

A37DB9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A37DB9 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
FFT3971 - 8 2026-07-06
FFT4499 - 7 2026-07-12
FFT4753 - 6 2026-07-06
FFT2550 - 6 2026-06-18
FFT4017 Frontier Airlines 5 2026-05-04
FFT3293 - 5 2026-07-09
FFT3155 - 5 2026-07-12
FFT1887 Frontier Airlines 5 2026-05-24
FFT4919 Frontier Airlines 4 2026-06-21
FFT4768 - 4 2026-07-10
FFT4069 - 4 2026-06-27
FFT3941 Frontier Airlines 4 2026-06-05
FFT3788 Frontier Airlines 4 2026-05-25
FFT3294 Frontier Airlines 4 2026-06-25
FFT3229 Frontier Airlines 4 2026-06-11
FFT3211 Frontier Airlines 4 2026-05-21
FFT2996 Frontier Airlines 4 2026-06-11
FFT2632 Frontier Airlines 4 2026-05-25
FFT2631 Frontier Airlines 4 2026-05-25
FFT2532 - 4 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT4993 MSY → DFW Jul 26, 19:25 UTCJul 26, 20:30 UTC1h 5m
2026-07-26 FFT4994 DFW → MSY Jul 26, 16:55 UTCJul 26, 18:10 UTC1h 15m
2026-07-26 FFT2219 DFW → SFO Jul 26, 10:35 UTCJul 26, 15:00 UTC4h 25m
2026-07-26 FFT4726 MCO → SJU Jul 26, 03:25 UTCJul 26, 05:55 UTC2h 30m
2026-07-26 FFT4426 PNS → MCO Jul 26, 00:20 UTCJul 26, 01:20 UTC1h 0m
2026-07-25 FFT4661 MCO → PNS Jul 25, 22:10 UTCJul 25, 23:10 UTC1h 0m
2026-07-25 FFT3476 RDU → PHL Jul 25, 17:50 UTCJul 25, 19:55 UTC2h 5m
2026-07-25 FFT3476 RDU → PHL Jul 25, 17:51 UTCJul 25, 19:52 UTC2h 1m
2026-07-25 FFT1369 MCO → GRR Jul 25, 14:00 UTCJul 25, 16:20 UTC2h 20m
2026-07-24 FFT4524 AUS → MCO Jul 24, 17:25 UTCJul 24, 19:35 UTC2h 10m
2026-07-24 FFT4524 AUS → MCO Jul 24, 11:50 UTCJul 24, 13:55 UTC2h 5m
2026-07-24 FFT1541 PHL → MCO Jul 24, 02:25 UTCJul 24, 04:10 UTC1h 45m
2026-07-23 FFT3272 MYR → PHL Jul 23, 23:40 UTCJul 24, 00:50 UTC1h 10m
2026-07-23 FFT1681 - Jul 23, 20:50 UTCJul 23, 22:15 UTC1h 25m
2026-07-23 FFT1682 - Jul 23, 17:20 UTCJul 23, 18:30 UTC1h 10m
2026-07-23 FFT3271 - Jul 23, 14:25 UTCJul 23, 15:45 UTC1h 20m
2026-07-23 FFT2506 MCO → PHL Jul 23, 10:30 UTCJul 23, 12:45 UTC2h 15m
2026-07-23 FFT3508 ATL → MCO Jul 23, 02:45 UTCJul 23, 03:45 UTC1h 0m
2026-07-22 FFT2899 DTW → ATL Jul 22, 23:20 UTCJul 23, 00:45 UTC1h 25m
2026-07-22 FFT2898 - Jul 22, 19:45 UTCJul 22, 21:15 UTC1h 30m
2026-07-22 FFT1669 CVG → MCO Jul 22, 16:35 UTCJul 22, 17:25 UTC50m
2026-07-22 FFT3057 BOS → RDU Jul 22, 13:20 UTCJul 22, 15:05 UTC1h 45m
2026-07-22 FFT3512 ATL → BOS Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-21 FFT125 ATL → MBJ Jul 21, 15:50 UTCJul 21, 22:05 UTC6h 15m
2026-07-21 FFT1123 PPM → ATL Jul 21, 00:55 UTCJul 21, 02:20 UTC1h 25m
2026-07-20 FFT3014 - Jul 20, 21:55 UTCJul 20, 23:15 UTC1h 20m
2026-07-20 FFT4435 TPA → ATL Jul 20, 18:35 UTCJul 20, 19:40 UTC1h 5m
2026-07-20 FFT1668 MCO → LGA Jul 20, 15:10 UTCJul 20, 17:05 UTC1h 55m
2026-07-20 FFT1668 MCO → LGA Jul 20, 15:15 UTCJul 20, 17:05 UTC1h 50m
2026-07-20 FFT1303 PHL → BNA Jul 20, 11:45 UTCJul 20, 13:50 UTC2h 5m
2026-07-20 FFT2746 DEN → TPA Jul 20, 06:10 UTCJul 20, 09:10 UTC3h 0m
2026-07-20 FFT2745 TPA → DEN Jul 20, 00:50 UTCJul 20, 03:55 UTC3h 5m
2026-07-19 FFT1689 PWM → RDU Jul 19, 21:20 UTCJul 19, 23:35 UTC2h 15m
2026-07-19 FFT1690 TPA → TTN Jul 19, 17:20 UTCJul 19, 19:35 UTC2h 15m
2026-07-19 FFT3782 DTW → ATL Jul 19, 14:25 UTCJul 19, 15:30 UTC1h 5m
2026-07-19 FFT1853 TPA → ATL Jul 19, 11:10 UTCJul 19, 12:15 UTC1h 5m
2026-07-19 FFT3371 RDU → TPA Jul 19, 02:45 UTCJul 19, 04:05 UTC1h 20m
2026-07-19 FFT3371 RDU → TPA Jul 19, 02:48 UTCJul 19, 04:03 UTC1h 15m
2026-07-18 FFT3372 TPA → ORF Jul 18, 23:50 UTCJul 19, 01:15 UTC1h 25m
2026-07-18 FFT2912 ATL → TPA Jul 18, 21:00 UTCJul 18, 22:00 UTC1h 0m
2026-07-18 FFT1846 - Jul 18, 17:45 UTCJul 18, 18:50 UTC1h 5m
2026-07-18 FFT1846 CVG → ATL Jul 18, 17:51 UTCJul 18, 18:49 UTC58m
2026-07-18 FFT4771 ATL → CVG Jul 18, 15:35 UTCJul 18, 16:35 UTC1h 0m
2026-07-18 FFT4707 IAD → ATL Jul 18, 11:40 UTCJul 18, 12:55 UTC1h 15m
2026-07-18 FFT4707 IAD → ATL Jul 18, 11:31 UTCJul 18, 12:54 UTC1h 23m
2026-07-18 FFT3692 ATL → IAD Jul 18, 02:40 UTCJul 18, 04:10 UTC1h 31m
2026-07-18 FFT3692 ATL → IAD Jul 18, 02:18 UTCJul 18, 04:05 UTC1h 47m
2026-07-17 FFT2972 MSY → ATL Jul 17, 23:39 UTCJul 18, 00:50 UTC1h 10m
2026-07-17 FFT1371 - Jul 17, 21:20 UTCJul 17, 22:25 UTC1h 5m
2026-07-17 FFT1846 - Jul 17, 17:15 UTCJul 17, 18:44 UTC1h 30m

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 N324FR page for operator, model, and routing details .

Mode-S A37DB9 frequently asked

What is Mode-S code A37DB9?
A37DB9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N324FR.
Where is Mode-S A37DB9 registered?
Mode-S code A37DB9 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 A37DB9 broadcasting right now?
Yes. Mode-S A37DB9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A37DB9, octal 50676671, decimal 10,714,553.
What flights does A37DB9 operate?
Mode-S A37DB9 has broadcast 20 distinct callsigns, including FFT3971, FFT4499, FFT4753, FFT2550, FFT4017.