Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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
No current signal · last broadcast 1d ago
Flights observed
418
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A8B4C6.

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
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
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
FFT4495 Frontier Airlines 3 2026-04-17
FFT44 Frontier Airlines 3 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 FFT2205 ORD → FLL Jul 12, 13:25 UTCJul 12, 15:55 UTC2h 30m
2026-07-12 FFT2446 LAX → ORD Jul 12, 07:31 UTCJul 12, 11:20 UTC3h 50m
2026-07-12 FFT3316 - Jul 12, 01:30 UTCJul 12, 02:35 UTC1h 5m
2026-07-11 FFT3315 - Jul 11, 23:10 UTCJul 12, 00:10 UTC1h 0m
2026-07-11 FFT2263 - Jul 11, 21:20 UTCJul 11, 22:05 UTC45m
2026-07-11 FFT4891 ATL → LAS Jul 11, 15:55 UTCJul 11, 19:45 UTC3h 50m
2026-07-11 FFT1563 MCO → ATL Jul 11, 11:55 UTCJul 11, 12:55 UTC1h 0m
2026-07-11 FFT1242 ATL → MCO Jul 11, 09:20 UTCJul 11, 10:15 UTC55m
2026-07-10 FFT152 CUN → ATL Jul 10, 20:25 UTCJul 10, 22:45 UTC2h 20m
2026-07-10 FFT152 CUN → ATL Jul 10, 20:32 UTCJul 10, 22:39 UTC2h 7m
2026-07-10 FFT153 ATL → CUN Jul 10, 17:00 UTCJul 10, 19:10 UTC2h 10m
2026-07-10 FFT4427 - Jul 10, 13:10 UTCJul 10, 14:30 UTC1h 20m
2026-07-10 FFT4427 BWI → ATL Jul 10, 12:49 UTCJul 10, 14:26 UTC1h 37m
2026-07-10 FFT2510 ATL → BWI Jul 10, 09:45 UTCJul 10, 11:20 UTC1h 35m
2026-07-10 FFT3691 IAD → ATL Jul 10, 02:35 UTCJul 10, 03:45 UTC1h 10m
2026-07-10 FFT3691 IAD → ATL Jul 10, 02:22 UTCJul 10, 03:45 UTC1h 23m
2026-07-09 FFT2960 - Jul 9, 22:50 UTCJul 10, 01:20 UTC2h 30m
2026-07-09 FFT4411 - Jul 9, 17:30 UTCJul 9, 19:45 UTC2h 15m
2026-07-09 FFT4412 - Jul 9, 13:45 UTCJul 9, 15:55 UTC2h 10m
2026-07-09 FFT2172 ATL → FLL Jul 9, 10:51 UTCJul 9, 12:08 UTC1h 17m
2026-07-09 FFT2172 - Jul 9, 10:45 UTCJul 9, 11:30 UTC45m
2026-07-09 FFT3691 IAD → ATL Jul 9, 00:46 UTCJul 9, 01:52 UTC1h 6m
2026-07-09 FFT3691 IAD → ATL Jul 9, 00:35 UTCJul 9, 01:55 UTC1h 20m
2026-07-08 FFT2960 - Jul 8, 21:30 UTCJul 8, 23:30 UTC2h 0m
2026-07-08 FFT4411 - Jul 8, 17:55 UTCJul 8, 20:00 UTC2h 5m
2026-07-08 FFT4412 - Jul 8, 13:50 UTCJul 8, 15:55 UTC2h 5m
2026-07-08 FFT2172 ATL → FLL Jul 8, 10:45 UTCJul 8, 12:10 UTC1h 25m
2026-07-08 FFT2400 - Jul 8, 02:45 UTCJul 8, 04:20 UTC1h 35m
2026-07-07 FFT3067 - Jul 7, 21:15 UTCJul 8, 00:15 UTC3h 0m
2026-07-07 FFT1080 - Jul 7, 18:20 UTCJul 7, 19:45 UTC1h 25m
2026-07-07 FFT1404 - Jul 7, 13:55 UTCJul 7, 15:30 UTC1h 35m
2026-07-07 FFT4075 - Jul 7, 05:40 UTCJul 7, 07:05 UTC1h 25m
2026-07-07 FFT2496 - Jul 7, 01:45 UTCJul 7, 03:50 UTC2h 5m
2026-07-06 FFT1269 ATL → DFW Jul 6, 22:00 UTCJul 6, 23:55 UTC1h 55m
2026-07-06 FFT3022 DFW → ATL Jul 6, 18:00 UTCJul 6, 19:40 UTC1h 40m
2026-07-06 FFT3423 LGA → DFW Jul 6, 13:10 UTCJul 6, 16:15 UTC3h 5m
2026-07-06 FFT3424 - Jul 6, 10:35 UTCJul 6, 11:40 UTC1h 5m
2026-07-06 FFT3424 DFW → CLE Jul 6, 00:20 UTCJul 6, 03:35 UTC3h 15m
2026-07-05 FFT1269 ATL → DFW Jul 5, 18:55 UTCJul 5, 21:10 UTC2h 15m
2026-07-05 FFT3022 DFW → ATL Jul 5, 15:25 UTCJul 5, 17:10 UTC1h 45m
2026-07-05 FFT3022 DFW → ATL Jul 5, 15:16 UTCJul 5, 17:06 UTC1h 50m
2026-07-05 FFT4895 CLE → DFW Jul 5, 11:15 UTCJul 5, 13:35 UTC2h 20m
2026-07-05 FFT2409 ATL → CLE Jul 5, 01:00 UTCJul 5, 02:20 UTC1h 20m
2026-07-04 FFT2409 - Jul 4, 20:10 UTCJul 4, 21:30 UTC1h 20m
2026-07-04 FFT2715 RSW → CLE Jul 4, 16:00 UTCJul 4, 18:10 UTC2h 10m
2026-07-04 FFT2338 - Jul 4, 11:35 UTCJul 4, 14:15 UTC2h 40m
2026-07-03 FFT3451 MDW → PHX Jul 3, 23:50 UTCJul 4, 02:30 UTC2h 40m
2026-07-03 FFT3452 PHX → MDW Jul 3, 20:20 UTCJul 3, 22:40 UTC2h 20m
2026-07-03 FFT3452 PHX → MDW Jul 3, 20:15 UTCJul 3, 22:40 UTC2h 25m
2026-07-03 FFT1045 CLE → MCO Jul 3, 16:10 UTCJul 3, 18:20 UTC2h 10m

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?
No active broadcast right now. Last signal was 1d ago.
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.