Apparatus

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sensors Mode-S transponder

A8E3B3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N672FR · AIRBUS A-321neo · operated by FRONTIER AIRLINES INC.

Hex
A8E3B3
Octal
52161663
Decimal
11,068,339
Country
US
Tail
N672FR
Type
A21N
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
510
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S A8E3B3.

Country allocation

The ICAO 24-bit address A8E3B3 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
FFT1726 Frontier Airlines 9 2026-07-25
FFT3856 - 8 2026-07-08
FFT4173 - 6 2026-06-30
FFT2060 - 6 2026-06-25
FFT2695 Frontier Airlines 5 2026-07-25
FFT67 Frontier Airlines 4 2026-06-16
FFT4895 Frontier Airlines 4 2026-07-02
FFT4440 Frontier Airlines 4 2026-05-12
FFT4439 Frontier Airlines 4 2026-05-03
FFT3913 Frontier Airlines 4 2026-07-21
FFT3679 Frontier Airlines 4 2026-05-23
FFT2416 Frontier Airlines 4 2026-05-03
FFT2298 - 4 2026-06-30
FFT2280 - 4 2026-07-05
FFT2265 Frontier Airlines 4 2026-07-24
FFT2008 Frontier Airlines 4 2026-04-16
FFT1807 Frontier Airlines 4 2026-04-29
FFT4889 Frontier Airlines 3 2026-05-01
FFT3600 Frontier Airlines 3 2026-06-17
FFT3508 Frontier Airlines 3 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT3067 BWI → IAH Jul 26, 21:00 UTCJul 26, 22:45 UTC1h 45m
2026-07-26 FFT2634 FLL → SWF Jul 26, 17:50 UTCJul 26, 19:25 UTC1h 35m
2026-07-26 FFT1404 IAH → ATL Jul 26, 13:55 UTCJul 26, 15:40 UTC1h 45m
2026-07-26 FFT4075 ATL → IAH Jul 26, 01:55 UTCJul 26, 03:25 UTC1h 30m
2026-07-25 FFT4474 STL → ATL Jul 25, 22:45 UTCJul 25, 23:50 UTC1h 5m
2026-07-25 FFT7 - Jul 25, 18:45 UTCJul 25, 20:35 UTC1h 50m
2026-07-25 FFT1726 PHL → SJU Jul 25, 08:05 UTCJul 25, 08:30 UTC25m
2026-07-25 FFT1726 PHL → SJU Jul 25, 05:20 UTCJul 25, 06:00 UTC40m
2026-07-25 FFT1726 PHL → SJU Jul 25, 04:58 UTCJul 25, 08:26 UTC3h 28m
2026-07-25 FFT2695 BWI → DFW Jul 25, 01:45 UTCJul 25, 02:40 UTC55m
2026-07-24 FFT2695 BWI → DFW Jul 24, 23:20 UTCJul 24, 23:30 UTC10m
2026-07-24 FFT1774 BWI → SJU Jul 24, 17:55 UTCJul 24, 21:15 UTC3h 20m
2026-07-24 FFT2265 ATL → TPA Jul 24, 14:15 UTCJul 24, 15:55 UTC1h 40m
2026-07-24 FFT2265 ATL → TPA Jul 24, 12:15 UTCJul 24, 12:30 UTC15m
2026-07-24 FFT1726 PHL → SJU Jul 24, 07:10 UTCJul 24, 07:25 UTC15m
2026-07-24 FFT1726 PHL → SJU Jul 24, 03:55 UTCJul 24, 04:40 UTC45m
2026-07-23 FFT2695 BWI → DFW Jul 23, 22:50 UTCJul 24, 02:10 UTC3h 20m
2026-07-23 FFT1774 BWI → SJU Jul 23, 17:05 UTCJul 23, 21:10 UTC4h 5m
2026-07-23 FFT1774 BWI → SJU Jul 23, 16:48 UTCJul 23, 21:06 UTC4h 18m
2026-07-23 FFT2265 ATL → TPA Jul 23, 14:20 UTCJul 23, 15:20 UTC1h 0m
2026-07-23 FFT2265 ATL → TPA Jul 23, 12:00 UTCJul 23, 12:10 UTC10m
2026-07-23 FFT1726 PHL → SJU Jul 23, 09:05 UTCJul 23, 09:25 UTC20m
2026-07-23 FFT1726 PHL → SJU Jul 23, 05:45 UTCJul 23, 07:25 UTC1h 40m
2026-07-22 FFT3480 JAX → PHL Jul 22, 20:25 UTCJul 22, 22:05 UTC1h 40m
2026-07-22 FFT2815 PHL → JAX Jul 22, 17:10 UTCJul 22, 18:50 UTC1h 40m
2026-07-22 FFT2815 PHL → JAX Jul 22, 16:54 UTCJul 22, 18:49 UTC1h 55m
2026-07-22 FFT1602 SNA → LAS Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-22 FFT2017 CLE → LAS Jul 22, 00:00 UTCJul 22, 02:55 UTC2h 55m
2026-07-21 FFT3108 LAS → STL Jul 21, 20:10 UTCJul 21, 22:55 UTC2h 45m
2026-07-21 FFT3913 MCO → LAS Jul 21, 00:55 UTCJul 21, 05:10 UTC4h 15m
2026-07-20 FFT3663 BWI → MCO Jul 20, 21:10 UTCJul 20, 23:00 UTC1h 50m
2026-07-20 FFT1516 - Jul 20, 17:30 UTCJul 20, 18:30 UTC1h 0m
2026-07-20 FFT2529 MCO → DTW Jul 20, 14:00 UTCJul 20, 16:10 UTC2h 10m
2026-07-20 FFT1086 PHX → MCO Jul 20, 07:20 UTCJul 20, 11:15 UTC3h 55m
2026-07-20 FFT2697 - Jul 20, 01:25 UTCJul 20, 04:50 UTC3h 25m
2026-07-19 FFT2698 PHX → CLE Jul 19, 19:45 UTCJul 19, 23:15 UTC3h 30m
2026-07-19 FFT2698 PHX → CLE Jul 19, 19:35 UTCJul 19, 23:20 UTC3h 45m
2026-07-19 FFT4048 LAS → PHX Jul 19, 17:20 UTCJul 19, 18:05 UTC45m
2026-07-19 FFT1019 PHX → LAS Jul 19, 14:58 UTCJul 19, 15:28 UTC30m
2026-07-19 FFT1019 PHX → LAS Jul 19, 14:45 UTCJul 19, 15:30 UTC45m
2026-07-19 FFT1896 LAS → PHX Jul 19, 05:00 UTCJul 19, 05:45 UTC45m
2026-07-18 FFT4758 ONT → LAS Jul 18, 22:45 UTCJul 18, 23:25 UTC40m
2026-07-18 FFT4758 ONT → LAS Jul 18, 22:53 UTCJul 18, 23:25 UTC32m
2026-07-18 FFT2276 SEA → ONT Jul 18, 19:15 UTCJul 18, 21:35 UTC2h 20m
2026-07-18 FFT2407 LAS → SEA Jul 18, 14:58 UTCJul 18, 16:45 UTC1h 47m
2026-07-18 FFT2407 LAS → SEA Jul 18, 14:50 UTCJul 18, 17:00 UTC2h 10m
2026-07-18 FFT3521 CVG → LAS Jul 18, 02:25 UTCJul 18, 05:50 UTC3h 26m
2026-07-17 FFT3412 LAS → CVG Jul 17, 21:20 UTCJul 18, 00:50 UTC3h 30m
2026-07-17 FFT4891 ATL → LAS Jul 17, 15:49 UTCJul 17, 19:25 UTC3h 35m
2026-07-17 FFT2633 BWI → ATL Jul 17, 11:00 UTCJul 17, 12:19 UTC1h 20m

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 N672FR page for operator, model, and routing details .

Mode-S A8E3B3 frequently asked

What is Mode-S code A8E3B3?
A8E3B3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N672FR.
Where is Mode-S A8E3B3 registered?
Mode-S code A8E3B3 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 A8E3B3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8E3B3, octal 52161663, decimal 11,068,339.
What flights does A8E3B3 operate?
Mode-S A8E3B3 has broadcast 20 distinct callsigns, including FFT1726, FFT3856, FFT4173, FFT2060, FFT2695.