Apparatus

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sensors Mode-S transponder

A8F28F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N676FR · operated by FRONTIER AIRLINES INC.

Hex
A8F28F
Octal
52171217
Decimal
11,072,143
Country
US
Tail
N676FR
No current signal · last broadcast 36m ago
Flights observed
437
Distinct callsigns
20
Country
US
Last broadcast
36m ago

Last known position

Most recent position reported by Mode-S A8F28F.

Country allocation

The ICAO 24-bit address A8F28F 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
FFT2205 - 6 2026-07-10
FFT3452 - 5 2026-07-07
FFT3018 - 5 2026-07-10
FFT2715 - 5 2026-07-03
FFT2338 - 5 2026-07-03
FFT2112 Frontier Airlines 5 2026-05-25
FFT1046 Frontier Airlines 5 2026-07-07
FFT1045 Frontier Airlines 5 2026-07-07
FFT4689 - 4 2026-07-19
FFT4455 Frontier Airlines 4 2026-05-22
FFT3568 - 4 2026-07-06
FFT3480 Frontier Airlines 4 2026-05-19
FFT3451 - 4 2026-07-08
FFT2409 - 4 2026-07-03
FFT2206 Frontier Airlines 4 2026-06-23
FFT2111 Frontier Airlines 4 2026-05-21
FFT1595 - 4 2026-06-22
FFT4954 Frontier Airlines 3 2026-05-21
FFT4683 Frontier Airlines 3 2026-06-06
FFT4593 - 3 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-20 FFT3135 ORD → IAH Jul 20, 23:05 UTCJul 21, 01:15 UTC2h 9m
2026-07-20 FFT1342 DFW → ORD Jul 20, 19:05 UTCJul 20, 21:05 UTC2h 0m
2026-07-20 FFT1342 DFW → ORD Jul 20, 18:40 UTCJul 20, 21:02 UTC2h 22m
2026-07-20 FFT1333 TPA → DFW Jul 20, 14:50 UTCJul 20, 17:00 UTC2h 10m
2026-07-20 FFT1334 MCO → LGA Jul 20, 10:45 UTCJul 20, 13:05 UTC2h 20m
2026-07-20 FFT2564 LAX → DFW Jul 20, 02:00 UTCJul 20, 04:50 UTC2h 50m
2026-07-19 FFT1755 - Jul 19, 21:15 UTCJul 20, 00:05 UTC2h 50m
2026-07-19 FFT2412 - Jul 19, 16:40 UTCJul 19, 19:30 UTC2h 50m
2026-07-19 FFT4689 - Jul 19, 12:55 UTCJul 19, 13:45 UTC50m
2026-07-19 FFT4689 DFW → ONT Jul 19, 12:46 UTCJul 19, 15:14 UTC2h 28m
2026-07-19 FFT9376 ONT → DFW Jul 19, 02:45 UTCJul 19, 02:55 UTC10m
2026-07-18 FFT9376 ONT → DFW Jul 18, 21:50 UTCJul 19, 00:35 UTC2h 45m
2026-07-17 FFT4689 DFW → ONT Jul 17, 13:29 UTCJul 17, 16:10 UTC2h 40m
2026-07-17 FFT3423 LGA → DFW Jul 17, 03:55 UTCJul 17, 06:45 UTC2h 50m
2026-07-16 FFT3424 - Jul 16, 23:10 UTCJul 17, 02:20 UTC3h 10m
2026-07-16 FFT2471 - Jul 16, 17:49 UTCJul 16, 21:10 UTC3h 20m
2026-07-16 FFT2472 DFW → EWR Jul 16, 13:10 UTCJul 16, 16:19 UTC3h 10m
2026-07-16 FFT3423 LGA → DFW Jul 16, 05:15 UTCJul 16, 08:05 UTC2h 50m
2026-07-16 FFT3424 DFW → LGA Jul 16, 00:40 UTCJul 16, 03:55 UTC3h 15m
2026-07-15 FFT1269 ATL → DFW Jul 15, 20:25 UTCJul 15, 22:05 UTC1h 40m
2026-07-15 FFT3022 - Jul 15, 16:05 UTCJul 15, 17:50 UTC1h 45m
2026-07-15 FFT1271 TPA → DTW Jul 15, 09:16 UTCJul 15, 10:53 UTC1h 37m
2026-07-15 FFT1271 TPA → DTW Jul 15, 09:10 UTCJul 15, 11:00 UTC1h 50m
2026-07-14 FFT4702 - Jul 14, 23:50 UTCJul 15, 01:40 UTC1h 50m
2026-07-14 FFT4211 - Jul 14, 20:35 UTCJul 14, 22:30 UTC1h 55m
2026-07-14 FFT3511 BOS → ATL Jul 14, 16:40 UTCJul 14, 18:50 UTC2h 10m
2026-07-14 FFT3512 - Jul 14, 12:55 UTCJul 14, 15:10 UTC2h 15m
2026-07-14 FFT3512 ATL → BOS Jul 14, 12:32 UTCJul 14, 15:06 UTC2h 34m
2026-07-14 FFT1448 - Jul 14, 06:45 UTCJul 14, 11:00 UTC4h 15m
2026-07-14 FFT1448 - Jul 14, 05:00 UTCJul 14, 05:05 UTC5m
2026-07-14 FFT4593 LAX → SFO Jul 14, 03:50 UTCJul 14, 04:45 UTC55m
2026-07-14 FFT4593 LAX → SFO Jul 14, 03:55 UTCJul 14, 05:05 UTC1h 10m
2026-07-13 FFT4145 - Jul 13, 20:15 UTCJul 14, 01:10 UTC4h 55m
2026-07-13 FFT1286 BNA → MCO Jul 13, 16:40 UTCJul 13, 18:25 UTC1h 45m
2026-07-13 FFT1285 MCO → BNA Jul 13, 13:20 UTCJul 13, 14:50 UTC1h 30m
2026-07-13 FFT4146 - Jul 13, 06:45 UTCJul 13, 11:10 UTC4h 25m
2026-07-13 FFT2858 SFO → LAX Jul 13, 03:55 UTCJul 13, 05:01 UTC1h 5m
2026-07-13 FFT2858 SFO → LAX Jul 13, 04:03 UTCJul 13, 04:56 UTC53m
2026-07-12 FFT1447 ATL → SFO Jul 12, 22:00 UTCJul 13, 02:20 UTC4h 20m
2026-07-12 FFT1101 PHL → ATL Jul 12, 17:55 UTCJul 12, 20:15 UTC2h 20m
2026-07-12 FFT2298 ATL → PHL Jul 12, 14:40 UTCJul 12, 16:10 UTC1h 30m
2026-07-12 FFT2551 - Jul 12, 10:40 UTCJul 12, 12:20 UTC1h 40m
2026-07-11 FFT2552 ATL → PHL Jul 11, 21:55 UTCJul 11, 23:25 UTC1h 30m
2026-07-11 FFT4731 JFK → ATL Jul 11, 17:10 UTCJul 11, 19:30 UTC2h 20m
2026-07-11 FFT4732 - Jul 11, 13:45 UTCJul 11, 15:30 UTC1h 45m
2026-07-11 FFT4797 - Jul 11, 10:30 UTCJul 11, 11:25 UTC55m
2026-07-11 FFT1670 - Jul 11, 02:55 UTCJul 11, 03:55 UTC1h 0m
2026-07-10 FFT2871 - Jul 10, 23:20 UTCJul 11, 00:45 UTC1h 25m
2026-07-10 FFT2871 - Jul 10, 21:30 UTCJul 10, 21:45 UTC15m
2026-07-10 FFT3018 - Jul 10, 19:30 UTCJul 10, 19:40 UTC10m

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 N676FR page for operator, model, and routing details .

Mode-S A8F28F frequently asked

What is Mode-S code A8F28F?
A8F28F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N676FR.
Where is Mode-S A8F28F registered?
Mode-S code A8F28F 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 A8F28F broadcasting right now?
No active broadcast right now. Last signal was 36m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8F28F, octal 52171217, decimal 11,072,143.
What flights does A8F28F operate?
Mode-S A8F28F has broadcast 20 distinct callsigns, including FFT2205, FFT3452, FFT3018, FFT2715, FFT2338.