Apparatus

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sensors Mode-S transponder

A45F8E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N381FR · AIRBUS A-320neo · operated by BANK OF UTAH TRUSTEE

Hex
A45F8E
Octal
51057616
Decimal
10,772,366
Country
US
Tail
N381FR
Type
A20N
No current signal · last broadcast Jul 26, 19:10 UTC
Flights observed
586
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:10 UTC

Last known position

Most recent position reported by Mode-S A45F8E.

Country allocation

The ICAO 24-bit address A45F8E 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
FFT91 Frontier Airlines 14 2026-07-26
FFT90 Frontier Airlines 9 2026-07-26
FFT1203 Frontier Airlines 7 2026-07-24
FFT1102 Frontier Airlines 7 2026-07-26
FFT2348 Frontier Airlines 6 2026-05-27
FFT1056 - 6 2026-07-16
FFT1003 Frontier Airlines 6 2026-07-25
FFT4685 - 5 2026-07-17
FFT3559 - 5 2026-07-17
FFT2452 Frontier Airlines 5 2026-06-13
FFT2347 Frontier Airlines 5 2026-05-28
FFT2047 Frontier Airlines 5 2026-05-29
FFT1204 Frontier Airlines 5 2026-07-25
FFT4966 Frontier Airlines 4 2026-04-17
FFT3923 - 4 2026-06-27
FFT3560 - 4 2026-07-17
FFT3133 Frontier Airlines 4 2026-06-15
FFT2890 Frontier Airlines 4 2026-05-28
FFT2885 - 4 2026-06-17
FFT2818 Frontier Airlines 4 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT90 CUN → PHL Jul 26, 15:45 UTCJul 26, 19:10 UTC3h 25m
2026-07-26 FFT91 PHL → CUN Jul 26, 10:40 UTCJul 26, 13:50 UTC3h 10m
2026-07-26 FFT1102 ATL → PHL Jul 26, 02:20 UTCJul 26, 03:50 UTC1h 30m
2026-07-25 FFT1003 PHL → ATL Jul 25, 23:10 UTCJul 26, 00:45 UTC1h 35m
2026-07-25 FFT1003 PHL → ATL Jul 25, 22:56 UTCJul 26, 00:44 UTC1h 48m
2026-07-25 FFT90 CUN → PHL Jul 25, 15:50 UTCJul 25, 19:00 UTC3h 10m
2026-07-25 FFT91 PHL → CUN Jul 25, 11:25 UTCJul 25, 14:30 UTC3h 5m
2026-07-25 FFT91 PHL → CUN Jul 25, 11:06 UTCJul 25, 14:29 UTC3h 23m
2026-07-25 FFT1204 MCO → BDL Jul 25, 01:45 UTCJul 25, 04:00 UTC2h 15m
2026-07-24 FFT1203 PHL → MIA Jul 24, 21:50 UTCJul 25, 00:05 UTC2h 15m
2026-07-24 FFT90 CUN → PHL Jul 24, 15:40 UTCJul 24, 18:50 UTC3h 10m
2026-07-24 FFT91 PHL → CUN Jul 24, 10:40 UTCJul 24, 13:50 UTC3h 10m
2026-07-24 FFT1204 MCO → BDL Jul 24, 01:45 UTCJul 24, 04:05 UTC2h 20m
2026-07-23 FFT1203 PHL → MIA Jul 23, 22:00 UTCJul 24, 00:15 UTC2h 15m
2026-07-23 FFT90 CUN → PHL Jul 23, 15:38 UTCJul 23, 18:31 UTC2h 53m
2026-07-23 FFT90 CUN → PHL Jul 23, 15:25 UTCJul 23, 18:35 UTC3h 10m
2026-07-23 FFT91 PHL → CUN Jul 23, 10:45 UTCJul 23, 13:30 UTC2h 45m
2026-07-23 FFT91 PHL → CUN Jul 23, 10:46 UTCJul 23, 13:53 UTC3h 7m
2026-07-23 FFT1102 ATL → PHL Jul 23, 00:50 UTCJul 23, 02:30 UTC1h 40m
2026-07-22 FFT1101 PHL → ATL Jul 22, 21:25 UTCJul 22, 23:00 UTC1h 35m
2026-07-22 FFT4170 MCO → PHL Jul 22, 17:35 UTCJul 22, 19:40 UTC2h 5m
2026-07-22 FFT1807 PHL → MCO Jul 22, 13:01 UTCJul 22, 15:59 UTC2h 58m
2026-07-22 FFT1807 PHL → MCO Jul 22, 14:00 UTCJul 22, 16:00 UTC2h 0m
2026-07-21 FFT90 CUN → PHL Jul 21, 15:40 UTCJul 21, 18:50 UTC3h 10m
2026-07-21 FFT91 PHL → CUN Jul 21, 10:55 UTCJul 21, 14:00 UTC3h 5m
2026-07-21 FFT1204 MCO → BDL Jul 21, 02:15 UTCJul 21, 04:55 UTC2h 40m
2026-07-20 FFT1203 PHL → MIA Jul 20, 22:25 UTCJul 21, 00:55 UTC2h 30m
2026-07-20 FFT90 CUN → PHL Jul 20, 15:40 UTCJul 20, 19:00 UTC3h 20m
2026-07-20 FFT91 PHL → CUN Jul 20, 10:40 UTCJul 20, 14:05 UTC3h 25m
2026-07-20 FFT91 PHL → CUN Jul 20, 09:50 UTCJul 20, 09:55 UTC5m
2026-07-20 FFT1204 MCO → BDL Jul 20, 09:20 UTCJul 20, 09:25 UTC5m
2026-07-20 FFT1204 MCO → BDL Jul 20, 04:10 UTCJul 20, 06:20 UTC2h 10m
2026-07-20 FFT1203 - Jul 20, 00:10 UTCJul 20, 02:55 UTC2h 45m
2026-07-19 FFT90 CUN → PHL Jul 19, 17:15 UTCJul 19, 20:45 UTC3h 30m
2026-07-19 FFT91 PHL → CUN Jul 19, 12:25 UTCJul 19, 15:40 UTC3h 15m
2026-07-19 FFT91 PHL → CUN Jul 19, 12:00 UTCJul 19, 12:10 UTC10m
2026-07-19 FFT91 PHL → CUN Jul 19, 11:15 UTCJul 19, 11:45 UTC30m
2026-07-19 FFT91 PHL → CUN Jul 19, 10:05 UTCJul 19, 10:10 UTC5m
2026-07-19 FFT1102 ATL → PHL Jul 19, 09:00 UTCJul 19, 09:05 UTC5m
2026-07-19 FFT1102 ATL → PHL Jul 19, 08:35 UTCJul 19, 08:55 UTC20m
2026-07-19 FFT1102 ATL → PHL Jul 19, 01:25 UTCJul 19, 03:10 UTC1h 45m
2026-07-18 FFT1003 PHL → ATL Jul 18, 23:35 UTCJul 18, 23:55 UTC20m
2026-07-18 FFT1003 PHL → ATL Jul 18, 21:30 UTCJul 18, 23:55 UTC2h 25m
2026-07-18 FFT1003 PHL → ATL Jul 18, 20:45 UTCJul 18, 21:00 UTC15m
2026-07-18 FFT1003 PHL → ATL Jul 18, 20:46 UTCJul 18, 23:16 UTC2h 30m
2026-07-18 FFT2538 TPA → PHL Jul 18, 17:15 UTCJul 18, 19:25 UTC2h 10m
2026-07-18 FFT4807 PSQ → TPA Jul 18, 13:35 UTCJul 18, 15:40 UTC2h 5m
2026-07-18 FFT4807 PHL → TPA Jul 18, 13:26 UTCJul 18, 15:40 UTC2h 14m
2026-07-18 FFT4807 - Jul 18, 13:05 UTCJul 18, 13:10 UTC5m
2026-07-18 FFT2508 - Jul 18, 09:35 UTCJul 18, 09:40 UTC5m

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 N381FR page for operator, model, and routing details .

Mode-S A45F8E frequently asked

What is Mode-S code A45F8E?
A45F8E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N381FR.
Where is Mode-S A45F8E registered?
Mode-S code A45F8E 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 A45F8E broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A45F8E, octal 51057616, decimal 10,772,366.
What flights does A45F8E operate?
Mode-S A45F8E has broadcast 20 distinct callsigns, including FFT91, FFT90, FFT1203, FFT1102, FFT2348.