Apparatus

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sensors Mode-S transponder

A40312

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N358FR · AIRBUS A-320neo · operated by UMB BANK NA TRUSTEE

Hex
A40312
Octal
51001422
Decimal
10,748,690
Country
US
Tail
N358FR
Type
A20N
Transponder active on ground
Flights observed
435
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A40312.

Country allocation

The ICAO 24-bit address A40312 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
FFT2250 Frontier Airlines 7 2026-06-16
FFT1165 Frontier Airlines 7 2026-06-16
FFT3439 - 6 2026-07-11
FFT2146 Frontier Airlines 6 2026-04-20
FFT1230 - 6 2026-07-11
FFT1203 - 6 2026-07-01
FFT687 - 5 2026-07-08
FFT3375 Frontier Airlines 5 2026-06-06
FFT2550 - 5 2026-06-26
FFT686 - 4 2026-07-08
FFT3566 Frontier Airlines 4 2026-06-02
FFT3376 Frontier Airlines 4 2026-06-06
FFT2407 Frontier Airlines 4 2026-04-24
FFT2147 - 4 2026-07-08
FFT2145 Frontier Airlines 4 2026-04-23
FFT1994 Frontier Airlines 4 2026-05-16
FFT1204 - 4 2026-06-15
FFT90 Frontier Airlines 3 2026-06-14
FFT777 Frontier Airlines 3 2026-05-16
FFT688 - 3 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFT4578 - Jul 14, 00:15 UTCJul 14, 01:10 UTC55m
2026-07-13 FFT1571 PHX → SAN Jul 13, 22:15 UTCJul 13, 23:05 UTC50m
2026-07-13 FFT3871 SLC → PHX Jul 13, 18:50 UTCJul 13, 20:05 UTC1h 15m
2026-07-13 FFT3871 SLC → PHX Jul 13, 18:53 UTCJul 13, 20:04 UTC1h 11m
2026-07-13 FFT3872 - Jul 13, 16:30 UTCJul 13, 17:40 UTC1h 10m
2026-07-12 FFT1819 DEN → PHX Jul 12, 00:01 UTCJul 12, 01:20 UTC1h 20m
2026-07-11 FFT1091 IND → MCO Jul 11, 19:25 UTCJul 11, 21:00 UTC1h 35m
2026-07-11 FFT4344 DEN → XNA Jul 11, 17:00 UTCJul 11, 18:20 UTC1h 20m
2026-07-11 FFT1230 - Jul 11, 13:10 UTCJul 11, 15:15 UTC2h 5m
2026-07-11 FFT3439 DEN → SFO Jul 11, 05:25 UTCJul 11, 07:35 UTC2h 10m
2026-07-11 FFT4625 - Jul 11, 01:00 UTCJul 11, 03:50 UTC2h 50m
2026-07-11 FFT4625 MEM → DEN Jul 11, 01:01 UTCJul 11, 03:50 UTC2h 49m
2026-07-10 FFT4626 - Jul 10, 22:00 UTCJul 10, 23:45 UTC1h 45m
2026-07-10 FFT1113 TPA → DEN Jul 10, 17:05 UTCJul 10, 20:15 UTC3h 10m
2026-07-10 FFT2748 DEN → TPA Jul 10, 12:20 UTCJul 10, 15:25 UTC3h 5m
2026-07-10 FFT4561 MSY → DEN Jul 10, 03:05 UTCJul 10, 05:30 UTC2h 25m
2026-07-09 FFT2360 - Jul 9, 23:40 UTCJul 10, 02:00 UTC2h 20m
2026-07-09 FFT1790 PDX → DEN Jul 9, 19:25 UTCJul 9, 22:05 UTC2h 40m
2026-07-09 FFT4499 - Jul 9, 16:25 UTCJul 9, 18:25 UTC2h 0m
2026-07-09 FFT3155 DEN → LAX Jul 9, 13:15 UTCJul 9, 15:15 UTC2h 0m
2026-07-09 FFT1127 - Jul 9, 02:25 UTCJul 9, 04:00 UTC1h 35m
2026-07-09 FFT1874 DEN → OMA Jul 9, 00:10 UTCJul 9, 01:20 UTC1h 10m
2026-07-08 FFT687 - Jul 8, 19:10 UTCJul 8, 22:50 UTC3h 40m
2026-07-08 FFT686 DEN → DCA Jul 8, 13:35 UTCJul 8, 16:45 UTC3h 10m
2026-07-08 FFT2147 DFW → DEN Jul 8, 10:55 UTCJul 8, 12:30 UTC1h 35m
2026-07-07 FFT2471 - Jul 7, 17:50 UTCJul 7, 20:55 UTC3h 5m
2026-07-07 FFT2471 EWR → DFW Jul 7, 17:48 UTCJul 7, 20:54 UTC3h 6m
2026-07-07 FFT2472 DFW → EWR Jul 7, 13:10 UTCJul 7, 16:15 UTC3h 5m
2026-07-06 FFT3165 - Jul 6, 16:20 UTCJul 6, 18:25 UTC2h 5m
2026-07-06 FFT3110 - Jul 6, 12:45 UTCJul 6, 14:50 UTC2h 5m
2026-07-06 FFT4000 SFO → DFW Jul 6, 08:15 UTCJul 6, 11:10 UTC2h 55m
2026-07-06 FFT3999 DFW → SFO Jul 6, 03:40 UTCJul 6, 06:55 UTC3h 15m
2026-07-05 FFT3223 MSP → DFW Jul 5, 23:05 UTCJul 6, 01:00 UTC1h 55m
2026-07-05 FFT3224 DFW → MSP Jul 5, 18:50 UTCJul 5, 21:05 UTC2h 15m
2026-07-05 FFT3021 ATL → DFW Jul 5, 15:10 UTCJul 5, 17:00 UTC1h 50m
2026-07-05 FFT1263 - Jul 5, 10:20 UTCJul 5, 11:50 UTC1h 30m
2026-07-05 FFT1264 ATL → DTW Jul 5, 03:35 UTCJul 5, 05:00 UTC1h 25m
2026-07-05 FFT4209 CLE → ATL Jul 5, 00:25 UTCJul 5, 01:02 UTC37m
2026-07-04 FFT4209 - Jul 4, 23:40 UTCJul 5, 00:05 UTC25m
2026-07-04 FFT4210 - Jul 4, 20:50 UTCJul 4, 22:05 UTC1h 15m
2026-07-04 FFT4210 ATL → CLE Jul 4, 20:46 UTCJul 4, 22:08 UTC1h 22m
2026-07-04 FFT2144 LAS → PHL Jul 4, 18:05 UTCJul 4, 19:30 UTC1h 25m
2026-07-04 FFT2779 ATL → MDW Jul 4, 15:30 UTCJul 4, 16:55 UTC1h 25m
2026-07-04 FFT2292 - Jul 4, 11:10 UTCJul 4, 12:30 UTC1h 20m
2026-07-04 FFT2292 MDW → ATL Jul 4, 11:12 UTCJul 4, 12:29 UTC1h 17m
2026-07-04 FFT2291 ATL → MDW Jul 4, 02:57 UTCJul 4, 04:49 UTC1h 52m
2026-07-04 FFT2291 ATL → MDW Jul 4, 02:50 UTCJul 4, 04:55 UTC2h 5m
2026-07-03 FFT1123 - Jul 3, 23:35 UTCJul 4, 00:55 UTC1h 20m
2026-07-03 FFT1123 FLL → ATL Jul 3, 23:44 UTCJul 4, 00:52 UTC1h 8m
2026-07-03 FFT3014 ATL → FLL Jul 3, 20:45 UTCJul 3, 22:15 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 N358FR page for operator, model, and routing details .

Mode-S A40312 frequently asked

What is Mode-S code A40312?
A40312 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N358FR.
Where is Mode-S A40312 registered?
Mode-S code A40312 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 A40312 broadcasting right now?
Mode-S A40312 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A40312, octal 51001422, decimal 10,748,690.
What flights does A40312 operate?
Mode-S A40312 has broadcast 20 distinct callsigns, including FFT2250, FFT1165, FFT3439, FFT2146, FFT1230.