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sensors Mode-S transponder

A8AAFF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N658FR · AIRBUS A-321neo · operated by BANK OF UTAH TRUSTEE

Hex
A8AAFF
Octal
52125377
Decimal
11,053,823
Country
US
Tail
N658FR
Type
A21N
Broadcasting now · callsign FFT1821 · 34,000 ft
Flights observed
490
Distinct callsigns
20
Country
US
Last broadcast
7h ago

Current position

A8AAFF is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8AAFF 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
FFT4420 - 10 2026-07-03
FFT91 Frontier Airlines 7 2026-04-16
FFT4440 - 7 2026-07-09
FFT3937 Frontier Airlines 7 2026-07-03
FFT4850 - 4 2026-04-17
FFT4439 Frontier Airlines 4 2026-04-19
FFT38 - 4 2026-07-02
FFT3599 Frontier Airlines 4 2026-05-10
FFT3511 Frontier Airlines 4 2026-06-10
FFT3316 - 4 2026-06-30
FFT3067 - 4 2026-07-01
FFT2871 - 4 2026-07-10
FFT241 - 4 2026-07-02
FFT2400 Frontier Airlines 4 2026-06-10
FFT240 - 4 2026-07-03
FFT22 Frontier Airlines 4 2026-06-06
FFT1404 - 4 2026-06-24
FFT1080 - 4 2026-07-01
FFT9458 Frontier Airlines 3 2026-06-24
FFT90 - 3 2026-04-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFT1045 - Jul 14, 15:40 UTCJul 14, 17:55 UTC2h 15m
2026-07-14 FFT1046 - Jul 14, 11:55 UTCJul 14, 14:15 UTC2h 20m
2026-07-14 FFT4135 - Jul 14, 01:05 UTCJul 14, 03:40 UTC2h 35m
2026-07-13 FFT3026 - Jul 13, 20:55 UTCJul 13, 23:25 UTC2h 30m
2026-07-13 FFT2667 - Jul 13, 15:15 UTCJul 13, 17:15 UTC2h 0m
2026-07-13 FFT1541 - Jul 13, 02:45 UTCJul 13, 04:45 UTC2h 0m
2026-07-13 FFT1541 PHL → PHL Jul 13, 02:35 UTCJul 13, 02:40 UTC5m
2026-07-12 FFT3272 - Jul 12, 23:50 UTCJul 13, 01:05 UTC1h 15m
2026-07-12 FFT1681 - Jul 12, 20:20 UTCJul 12, 21:45 UTC1h 25m
2026-07-12 FFT1682 - Jul 12, 17:55 UTCJul 12, 19:15 UTC1h 20m
2026-07-12 FFT1682 MYR → ISP Jul 12, 17:47 UTCJul 12, 19:09 UTC1h 22m
2026-07-12 FFT3271 - Jul 12, 15:20 UTCJul 12, 16:20 UTC1h 0m
2026-07-12 FFT3271 PHL → PHL Jul 12, 15:10 UTCJul 12, 15:15 UTC5m
2026-07-12 FFT3271 PHL → MYR Jul 12, 15:01 UTCJul 12, 16:26 UTC1h 25m
2026-07-12 FFT2506 MCO → PHL Jul 12, 10:55 UTCJul 12, 12:55 UTC2h 0m
2026-07-11 FFT4454 - Jul 11, 15:10 UTCJul 11, 17:15 UTC2h 5m
2026-07-11 FFT3761 MCO → IND Jul 11, 11:50 UTCJul 11, 13:55 UTC2h 5m
2026-07-11 FFT2886 DFW → MCO Jul 11, 01:30 UTCJul 11, 03:35 UTC2h 5m
2026-07-10 FFT1481 MCO → DFW Jul 10, 21:35 UTCJul 10, 23:50 UTC2h 15m
2026-07-10 FFT4018 DFW → MCO Jul 10, 17:00 UTCJul 10, 19:10 UTC2h 10m
2026-07-10 FFT2885 MCO → DFW Jul 10, 12:45 UTCJul 10, 15:10 UTC2h 25m
2026-07-10 FFT2885 MCO → DFW Jul 10, 12:53 UTCJul 10, 14:55 UTC2h 2m
2026-07-10 FFT1242 ATL → MCO Jul 10, 09:30 UTCJul 10, 10:30 UTC1h 0m
2026-07-10 FFT2871 - Jul 10, 01:35 UTCJul 10, 03:05 UTC1h 30m
2026-07-10 FFT2871 - Jul 10, 00:00 UTCJul 10, 00:10 UTC10m
2026-07-09 FFT1166 MCO → PHL Jul 9, 22:05 UTCJul 9, 22:30 UTC25m
2026-07-09 FFT1166 MCO → PHL Jul 9, 19:00 UTCJul 9, 20:00 UTC1h 0m
2026-07-09 FFT1384 - Jul 9, 15:05 UTCJul 9, 16:20 UTC1h 15m
2026-07-09 FFT2387 - Jul 9, 12:05 UTCJul 9, 13:15 UTC1h 10m
2026-07-09 FFT4440 - Jul 9, 04:45 UTCJul 9, 04:50 UTC5m
2026-07-09 FFT4440 - Jul 9, 02:30 UTCJul 9, 04:40 UTC2h 10m
2026-07-08 FFT1983 - Jul 8, 23:55 UTCJul 9, 01:20 UTC1h 25m
2026-07-08 FFT4353 - Jul 8, 21:20 UTCJul 8, 22:35 UTC1h 15m
2026-07-08 FFT2538 - Jul 8, 16:45 UTCJul 8, 18:55 UTC2h 10m
2026-07-08 FFT4807 PHL → TPA Jul 8, 12:55 UTCJul 8, 15:05 UTC2h 10m
2026-07-08 FFT1602 - Jul 8, 10:00 UTCJul 8, 10:15 UTC15m
2026-07-08 FFT1602 - Jul 8, 05:30 UTCJul 8, 09:45 UTC4h 15m
2026-07-08 FFT3449 - Jul 8, 02:25 UTCJul 8, 03:35 UTC1h 10m
2026-07-07 FFT3450 - Jul 7, 23:35 UTCJul 8, 00:40 UTC1h 5m
2026-07-07 FFT3450 LAS → ELP Jul 7, 23:35 UTCJul 8, 00:55 UTC1h 20m
2026-07-07 FFT1601 PHL → LAS Jul 7, 15:30 UTCJul 7, 20:05 UTC4h 35m
2026-07-07 FFT1601 PHL → LAS Jul 7, 15:22 UTCJul 7, 20:01 UTC4h 39m
2026-07-07 FFT1602 - Jul 7, 05:35 UTCJul 7, 09:50 UTC4h 15m
2026-07-06 FFT3450 LAS → LAS Jul 6, 23:45 UTCJul 7, 03:45 UTC4h 0m
2026-07-06 FFT4244 - Jul 6, 21:20 UTCJul 6, 22:15 UTC55m
2026-07-06 FFT4243 - Jul 6, 19:10 UTCJul 6, 20:00 UTC50m
2026-07-06 FFT2145 PHL → LAS Jul 6, 14:40 UTCJul 6, 17:50 UTC3h 10m
2026-07-06 FFT2146 LAS → ORD Jul 6, 07:55 UTCJul 6, 11:10 UTC3h 15m
2026-07-06 FFT3521 - Jul 6, 01:55 UTCJul 6, 05:20 UTC3h 25m
2026-07-05 FFT3412 LAS → CVG Jul 5, 20:40 UTCJul 6, 00:10 UTC3h 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 N658FR page for operator, model, and routing details .

Mode-S A8AAFF frequently asked

What is Mode-S code A8AAFF?
A8AAFF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N658FR.
Where is Mode-S A8AAFF registered?
Mode-S code A8AAFF 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 A8AAFF broadcasting right now?
Yes. Mode-S A8AAFF is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8AAFF, octal 52125377, decimal 11,053,823.
What flights does A8AAFF operate?
Mode-S A8AAFF has broadcast 20 distinct callsigns, including FFT4420, FFT91, FFT4440, FFT3937, FFT4850.