Apparatus

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sensors Mode-S transponder

A37A02

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N323FR · AIRBUS A-320neo · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A37A02
Octal
50675002
Decimal
10,713,602
Country
US
Tail
N323FR
Type
A20N
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
514
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A37A02.

Country allocation

The ICAO 24-bit address A37A02 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
FFT3439 Frontier Airlines 8 2026-07-24
FFT688 Frontier Airlines 7 2026-07-25
FFT1500 Frontier Airlines 7 2026-07-21
FFT1230 Frontier Airlines 7 2026-07-24
FFT777 - 6 2026-07-17
FFT686 - 6 2026-07-19
FFT4567 - 6 2026-07-22
FFT3975 - 6 2026-07-06
FFT3566 - 6 2026-07-14
FFT3302 Frontier Airlines 6 2026-07-21
FFT2348 - 6 2026-07-14
FFT1874 - 6 2026-07-19
FFT1401 - 6 2026-07-16
FFT1127 - 6 2026-07-20
FFT689 Frontier Airlines 5 2026-07-25
FFT687 - 5 2026-07-19
FFT3565 - 5 2026-07-14
FFT3229 - 5 2026-06-25
FFT2553 Frontier Airlines 5 2026-07-26
FFT2347 - 5 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT2553 DEN → PDX Jul 26, 21:20 UTCJul 26, 22:30 UTC1h 10m
2026-07-26 FFT3293 ATL → DEN Jul 26, 16:55 UTCJul 26, 19:20 UTC2h 25m
2026-07-26 FFT3294 DEN → ATL Jul 26, 12:35 UTCJul 26, 15:05 UTC2h 30m
2026-07-25 FFT689 DCA → DEN Jul 25, 22:15 UTCJul 26, 01:35 UTC3h 20m
2026-07-25 FFT688 DEN → DCA Jul 25, 17:40 UTCJul 25, 20:35 UTC2h 55m
2026-07-25 FFT688 DEN → DCA Jul 25, 17:38 UTCJul 25, 20:31 UTC2h 53m
2026-07-25 FFT2818 SAN → DEN Jul 25, 13:40 UTCJul 25, 15:35 UTC1h 55m
2026-07-25 FFT4989 DEN → SAN Jul 25, 05:00 UTCJul 25, 06:50 UTC1h 50m
2026-07-25 FFT3707 SAT → DEN Jul 25, 01:10 UTCJul 25, 03:00 UTC1h 50m
2026-07-24 FFT2356 RSW → PHL Jul 24, 22:15 UTCJul 25, 00:00 UTC1h 45m
2026-07-24 FFT1677 DSM → DEN Jul 24, 19:30 UTCJul 24, 20:55 UTC1h 25m
2026-07-24 FFT1678 RDU → SYR Jul 24, 16:55 UTCJul 24, 18:10 UTC1h 15m
2026-07-24 FFT1230 MCO → GRB Jul 24, 13:10 UTCJul 24, 15:15 UTC2h 5m
2026-07-24 FFT3439 DEN → SFO Jul 24, 05:30 UTCJul 24, 07:40 UTC2h 10m
2026-07-24 FFT3439 DEN → SFO Jul 24, 05:23 UTCJul 24, 07:37 UTC2h 14m
2026-07-24 FFT4061 MSN → DEN Jul 24, 01:15 UTCJul 24, 03:10 UTC1h 55m
2026-07-23 FFT1560 DEN → MSN Jul 23, 22:20 UTCJul 24, 00:00 UTC1h 40m
2026-07-23 FFT3982 DEN → DCA Jul 23, 19:35 UTCJul 23, 20:40 UTC1h 5m
2026-07-23 FFT3219 PHL → FLL Jul 23, 17:00 UTCJul 23, 18:10 UTC1h 10m
2026-07-23 FFT1376 PHX → DEN Jul 23, 13:50 UTCJul 23, 15:05 UTC1h 15m
2026-07-23 FFT1376 PHX → DEN Jul 23, 13:53 UTCJul 23, 15:04 UTC1h 11m
2026-07-23 FFT2697 CLE → PHX Jul 23, 01:20 UTCJul 23, 05:05 UTC3h 45m
2026-07-22 FFT2698 PHX → CLE Jul 22, 19:40 UTCJul 22, 23:10 UTC3h 30m
2026-07-22 FFT4567 STL → DEN Jul 22, 01:05 UTCJul 22, 02:55 UTC1h 50m
2026-07-21 FFT3302 DEN → STL Jul 21, 22:20 UTCJul 21, 23:55 UTC1h 35m
2026-07-21 FFT3375 MCI → DEN Jul 21, 19:05 UTCJul 21, 20:20 UTC1h 15m
2026-07-21 FFT4828 DEN → MCI Jul 21, 16:30 UTCJul 21, 17:45 UTC1h 15m
2026-07-21 FFT1500 ONT → DEN Jul 21, 13:05 UTCJul 21, 15:00 UTC1h 55m
2026-07-21 FFT1261 DEN → ONT Jul 21, 05:40 UTCJul 21, 07:25 UTC1h 45m
2026-07-21 FFT4567 STL → DEN Jul 21, 02:20 UTCJul 21, 04:00 UTC1h 40m
2026-07-20 FFT3302 DEN → STL Jul 20, 23:10 UTCJul 21, 00:50 UTC1h 40m
2026-07-20 FFT3375 MCI → DEN Jul 20, 18:55 UTCJul 20, 20:10 UTC1h 15m
2026-07-20 FFT4828 DEN → MCI Jul 20, 16:30 UTCJul 20, 17:35 UTC1h 5m
2026-07-20 FFT1500 ONT → DEN Jul 20, 13:10 UTCJul 20, 15:10 UTC2h 0m
2026-07-20 FFT1261 DEN → ONT Jul 20, 04:55 UTCJul 20, 06:40 UTC1h 45m
2026-07-20 FFT1127 - Jul 20, 01:10 UTCJul 20, 02:20 UTC1h 10m
2026-07-19 FFT1874 - Jul 19, 23:00 UTCJul 20, 00:00 UTC1h 0m
2026-07-19 FFT687 DCA → DEN Jul 19, 18:20 UTCJul 19, 21:30 UTC3h 10m
2026-07-19 FFT686 DEN → DCA Jul 19, 13:40 UTCJul 19, 16:35 UTC2h 55m
2026-07-19 FFT4946 LAX → DEN Jul 19, 04:05 UTCJul 19, 06:05 UTC2h 0m
2026-07-19 FFT4500 PDX → LAX Jul 19, 00:45 UTCJul 19, 02:50 UTC2h 5m
2026-07-18 FFT2553 DEN → PDX Jul 18, 21:15 UTCJul 18, 23:30 UTC2h 15m
2026-07-18 FFT4069 DFW → DEN Jul 18, 03:15 UTCJul 18, 04:45 UTC1h 30m
2026-07-17 FFT2148 DEN → DFW Jul 17, 23:36 UTCJul 18, 00:59 UTC1h 23m
2026-07-17 FFT2148 DEN → DFW Jul 17, 23:30 UTCJul 18, 01:00 UTC1h 30m
2026-07-17 FFT1790 PDX → DEN Jul 17, 19:25 UTCJul 17, 21:34 UTC2h 10m
2026-07-17 FFT4499 LAX → PDX Jul 17, 16:24 UTCJul 17, 18:10 UTC1h 45m
2026-07-17 FFT3155 - Jul 17, 13:20 UTCJul 17, 15:15 UTC1h 55m
2026-07-17 FFT2016 LAS → DEN Jul 17, 08:35 UTCJul 17, 10:00 UTC1h 25m
2026-07-17 FFT777 - Jul 17, 06:50 UTCJul 17, 07:05 UTC15m

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 N323FR page for operator, model, and routing details .

Mode-S A37A02 frequently asked

What is Mode-S code A37A02?
A37A02 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N323FR.
Where is Mode-S A37A02 registered?
Mode-S code A37A02 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 A37A02 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A37A02, octal 50675002, decimal 10,713,602.
What flights does A37A02 operate?
Mode-S A37A02 has broadcast 20 distinct callsigns, including FFT3439, FFT688, FFT1500, FFT1230, FFT777.