Apparatus

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sensors Mode-S transponder

A8B4C6

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N660FR · AIRBUS A-321neo · operated by BANK OF UTAH TRUSTEE

Hex
A8B4C6
Octal
52132306
Decimal
11,056,326
Country
US
Tail
N660FR
Type
A21N
Broadcasting now · callsign FFT3216 · 7,375 ft
Flights observed
472
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:45 UTC

Current position

A8B4C6 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A8B4C6 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
FFT86 Frontier Airlines 5 2026-06-03
FFT4916 Frontier Airlines 5 2026-06-06
FFT3136 Frontier Airlines 5 2026-06-04
FFT2428 Frontier Airlines 5 2026-05-07
FFT4891 - 4 2026-07-11
FFT4411 - 4 2026-07-09
FFT4184 - 4 2026-06-28
FFT3691 - 4 2026-07-10
FFT3022 Frontier Airlines 4 2026-07-24
FFT2871 Frontier Airlines 4 2026-06-06
FFT2409 - 4 2026-07-05
FFT2205 - 4 2026-07-12
FFT1728 Frontier Airlines 4 2026-06-21
FFT1596 Frontier Airlines 4 2026-06-05
FFT152 - 4 2026-07-14
FFT1466 Frontier Airlines 4 2026-06-26
FFT1407 Frontier Airlines 4 2026-06-05
FFT1106 Frontier Airlines 4 2026-06-16
FFT87 Frontier Airlines 3 2026-06-04
FFT45 Frontier Airlines 3 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT2471 EWR → DFW Jul 26, 17:40 UTCJul 26, 20:35 UTC2h 55m
2026-07-26 FFT2472 DFW → EWR Jul 26, 13:00 UTCJul 26, 16:00 UTC3h 0m
2026-07-26 FFT2564 LAX → DFW Jul 26, 02:05 UTCJul 26, 05:05 UTC3h 0m
2026-07-25 FFT1755 IAH → LAX Jul 25, 21:45 UTCJul 26, 00:35 UTC2h 50m
2026-07-25 FFT2412 ONT → IAH Jul 25, 16:50 UTCJul 25, 19:45 UTC2h 55m
2026-07-25 FFT4689 DFW → ONT Jul 25, 12:55 UTCJul 25, 15:20 UTC2h 25m
2026-07-25 FFT3097 ATL → DFW Jul 25, 02:35 UTCJul 25, 04:15 UTC1h 40m
2026-07-24 FFT2496 DFW → ATL Jul 24, 23:10 UTCJul 25, 01:05 UTC1h 55m
2026-07-24 FFT1269 ATL → DFW Jul 24, 19:40 UTCJul 24, 21:40 UTC2h 0m
2026-07-24 FFT3022 DFW → ATL Jul 24, 15:20 UTCJul 24, 17:10 UTC1h 50m
2026-07-24 FFT2135 MIA → DFW Jul 24, 10:40 UTCJul 24, 13:10 UTC2h 30m
2026-07-23 FFT1665 LGA → MCO Jul 23, 23:55 UTCJul 24, 01:55 UTC2h 0m
2026-07-23 FFT2940 MIA → BWI Jul 23, 19:55 UTCJul 23, 22:45 UTC2h 50m
2026-07-23 FFT67 PUJ → MIA Jul 23, 12:30 UTCJul 23, 17:55 UTC5h 25m
2026-07-23 FFT1280 DEN → MIA Jul 23, 07:25 UTCJul 23, 10:50 UTC3h 25m
2026-07-23 FFT9860 ISP → TPA Jul 23, 03:25 UTCJul 23, 05:25 UTC2h 0m
2026-07-22 FFT317 CUN → IAH Jul 22, 19:10 UTCJul 22, 21:05 UTC1h 55m
2026-07-22 FFT70 DEN → CUN Jul 22, 13:55 UTCJul 22, 17:20 UTC3h 25m
2026-07-21 FFT71 CUN → DEN Jul 21, 20:45 UTCJul 22, 00:15 UTC3h 30m
2026-07-21 FFT316 IAH → CUN Jul 21, 17:15 UTCJul 21, 19:05 UTC1h 50m
2026-07-21 FFT3206 DEN → IAH Jul 21, 13:05 UTCJul 21, 15:05 UTC2h 0m
2026-07-21 FFT3707 SAT → DEN Jul 21, 00:55 UTCJul 21, 02:30 UTC1h 35m
2026-07-20 FFT2356 RSW → PHL Jul 20, 21:45 UTCJul 20, 23:35 UTC1h 50m
2026-07-20 FFT2225 - Jul 20, 16:40 UTCJul 20, 19:40 UTC3h 0m
2026-07-20 FFT2440 DEN → RDU Jul 20, 12:10 UTCJul 20, 15:00 UTC2h 50m
2026-07-20 FFT2347 PHL → PBI Jul 20, 01:05 UTCJul 20, 03:15 UTC2h 10m
2026-07-19 FFT2348 DEN → IND Jul 19, 21:45 UTCJul 19, 23:45 UTC2h 0m
2026-07-19 FFT3199 MSP → DEN Jul 19, 18:30 UTCJul 19, 20:00 UTC1h 30m
2026-07-19 FFT1150 DEN → MSP Jul 19, 15:25 UTCJul 19, 16:55 UTC1h 30m
2026-07-19 FFT1279 - Jul 19, 10:15 UTCJul 19, 13:50 UTC3h 35m
2026-07-19 FFT3442 - Jul 19, 02:45 UTCJul 19, 04:25 UTC1h 40m
2026-07-18 FFT4405 - Jul 18, 22:10 UTCJul 19, 00:20 UTC2h 10m
2026-07-18 FFT8103 PUJ → MIA Jul 18, 14:15 UTCJul 18, 20:25 UTC6h 10m
2026-07-18 FFT3377 SJU → MIA Jul 18, 09:50 UTCJul 18, 12:00 UTC2h 10m
2026-07-18 FFT3378 - Jul 18, 04:40 UTCJul 18, 04:50 UTC10m
2026-07-18 FFT3378 - Jul 18, 02:45 UTCJul 18, 03:05 UTC21m
2026-07-17 FFT2335 PHL → PHX Jul 17, 23:35 UTCJul 18, 01:05 UTC1h 30m
2026-07-17 FFT3322 - Jul 17, 20:25 UTCJul 17, 22:10 UTC1h 45m
2026-07-17 FFT2676 - Jul 17, 15:40 UTCJul 17, 18:05 UTC2h 25m
2026-07-17 FFT2135 - Jul 17, 10:55 UTCJul 17, 13:29 UTC2h 35m
2026-07-17 FFT9550 LGA → ATL Jul 17, 02:34 UTCJul 17, 03:14 UTC40m
2026-07-16 FFT2505 PHL → MCO Jul 16, 23:10 UTCJul 17, 01:05 UTC1h 55m
2026-07-16 FFT2505 PHL → MCO Jul 16, 22:59 UTCJul 16, 23:05 UTC5m
2026-07-16 FFT2932 - Jul 16, 19:14 UTCJul 16, 21:19 UTC2h 5m
2026-07-16 FFT2932 FLL → PHL Jul 16, 19:16 UTCJul 16, 21:19 UTC2h 3m
2026-07-16 FFT2007 DTW → FLL Jul 16, 13:23 UTCJul 16, 16:07 UTC2h 44m
2026-07-16 FFT2021 - Jul 16, 10:50 UTCJul 16, 12:05 UTC1h 15m
2026-07-15 FFT180 PHL → PHL Jul 15, 12:00 UTCJul 15, 20:15 UTC8h 15m
2026-07-15 FFT181 - Jul 15, 11:05 UTCJul 15, 11:10 UTC5m
2026-07-15 FFT1102 - Jul 15, 07:05 UTCJul 15, 07:30 UTC25m

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 N660FR page for operator, model, and routing details .

Mode-S A8B4C6 frequently asked

What is Mode-S code A8B4C6?
A8B4C6 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N660FR.
Where is Mode-S A8B4C6 registered?
Mode-S code A8B4C6 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 A8B4C6 broadcasting right now?
Yes. Mode-S A8B4C6 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8B4C6, octal 52132306, decimal 11,056,326.
What flights does A8B4C6 operate?
Mode-S A8B4C6 has broadcast 20 distinct callsigns, including FFT86, FFT4916, FFT3136, FFT2428, FFT4891.