sensors Mode-S transponder

A8F9FD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N678FR · operated by FRONTIER AIRLINES INC.

Hex
A8F9FD
Octal
52174775
Decimal
11,074,045
Country
US
Tail
N678FR
No current signal · last broadcast 2h ago
Flights observed
164
Distinct callsigns
20
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A8F9FD.

Country allocation

The ICAO 24-bit address A8F9FD 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
FFT1225 - 4 2026-07-08
FFT9578 Frontier Airlines 3 2026-06-15
FFT2609 - 3 2026-07-13
FFT2082 - 3 2026-07-14
FFT2008 - 3 2026-07-13
FFT1449 Frontier Airlines 3 2026-07-06
FFT1150 Frontier Airlines 3 2026-06-23
FFT4949 Frontier Airlines 2 2026-07-04
FFT4712 - 2 2026-07-07
FFT4455 - 2 2026-07-10
FFT4161 - 2 2026-07-09
FFT4003 Frontier Airlines 2 2026-06-16
FFT3986 - 2 2026-07-10
FFT3663 - 2 2026-07-04
FFT3364 - 2 2026-07-14
FFT3199 Frontier Airlines 2 2026-06-23
FFT3083 - 2 2026-07-07
FFT3067 Frontier Airlines 2 2026-06-05
FFT2919 Frontier Airlines 2 2026-06-28
FFT2899 Frontier Airlines 2 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFT2082 - Jul 14, 15:30 UTCJul 14, 23:30 UTC7h 59m
2026-07-14 FFT1241 MCO → ATL Jul 14, 12:00 UTCJul 14, 13:10 UTC1h 10m
2026-07-14 FFT3364 - Jul 14, 02:15 UTCJul 14, 03:00 UTC45m
2026-07-13 FFT3364 - Jul 13, 18:20 UTCJul 13, 22:15 UTC3h 55m
2026-07-13 FFT2008 - Jul 13, 14:30 UTCJul 13, 16:50 UTC2h 20m
2026-07-13 FFT2609 PHL → FLL Jul 13, 10:45 UTCJul 13, 13:00 UTC2h 15m
2026-07-13 FFT2609 PHL → FLL Jul 13, 10:26 UTCJul 13, 13:04 UTC2h 38m
2026-07-13 FFT4440 - Jul 13, 03:50 UTCJul 13, 06:05 UTC2h 15m
2026-07-13 FFT1983 - Jul 13, 00:01 UTCJul 13, 01:40 UTC1h 40m
2026-07-12 FFT4353 - Jul 12, 20:20 UTCJul 12, 21:35 UTC1h 15m
2026-07-12 FFT3856 - Jul 12, 16:40 UTCJul 12, 18:50 UTC2h 10m
2026-07-12 FFT1807 PHL → MCO Jul 12, 12:35 UTCJul 12, 14:30 UTC1h 55m
2026-07-11 FFT180 PHL → PHL Jul 11, 11:35 UTCJul 11, 19:20 UTC7h 45m
2026-07-11 FFT1328 - Jul 11, 02:45 UTCJul 11, 03:50 UTC1h 5m
2026-07-10 FFT1984 - Jul 10, 23:30 UTCJul 11, 01:00 UTC1h 30m
2026-07-10 FFT4455 - Jul 10, 19:15 UTCJul 10, 21:45 UTC2h 31m
2026-07-10 FFT4455 PHL → FLL Jul 10, 19:15 UTCJul 10, 21:34 UTC2h 19m
2026-07-10 FFT2388 ATL → PHL Jul 10, 15:10 UTCJul 10, 16:20 UTC1h 10m
2026-07-10 FFT2388 ATL → PHL Jul 10, 15:04 UTCJul 10, 16:15 UTC1h 11m
2026-07-10 FFT2387 - Jul 10, 12:15 UTCJul 10, 13:20 UTC1h 5m
2026-07-10 FFT3986 DFW → PHL Jul 10, 04:45 UTCJul 10, 07:12 UTC2h 27m
2026-07-10 FFT3986 DFW → PHL Jul 10, 04:25 UTCJul 10, 07:10 UTC2h 45m
2026-07-09 FFT4161 - Jul 9, 22:45 UTCJul 10, 01:50 UTC3h 5m
2026-07-09 FFT4161 PHL → DFW Jul 9, 22:16 UTCJul 10, 01:45 UTC3h 29m
2026-07-09 FFT2022 - Jul 9, 18:30 UTCJul 9, 20:00 UTC1h 30m
2026-07-09 FFT2008 - Jul 9, 14:25 UTCJul 9, 16:50 UTC2h 25m
2026-07-09 FFT2008 FLL → DTW Jul 9, 14:16 UTCJul 9, 16:43 UTC2h 27m
2026-07-09 FFT2609 - Jul 9, 10:35 UTCJul 9, 13:10 UTC2h 35m
2026-07-08 FFT1015 - Jul 8, 22:15 UTCJul 8, 23:10 UTC55m
2026-07-08 FFT1015 - Jul 8, 19:50 UTCJul 8, 20:10 UTC20m
2026-07-08 FFT1226 RDU → SJU Jul 8, 15:25 UTCJul 8, 18:25 UTC3h 0m
2026-07-08 FFT1225 - Jul 8, 01:45 UTCJul 8, 02:10 UTC25m
2026-07-08 FFT1225 MYR → RDU Jul 8, 01:38 UTCJul 8, 02:09 UTC31m
2026-07-07 FFT1225 - Jul 7, 22:25 UTCJul 8, 00:20 UTC1h 55m
2026-07-07 FFT1225 - Jul 7, 20:00 UTCJul 7, 20:15 UTC15m
2026-07-07 FFT2082 ATL → SJU Jul 7, 14:51 UTCJul 7, 17:59 UTC3h 8m
2026-07-07 FFT2082 ATL → SJU Jul 7, 14:50 UTCJul 7, 18:00 UTC3h 10m
2026-07-07 FFT2633 BWI → ATL Jul 7, 11:20 UTCJul 7, 12:45 UTC1h 25m
2026-07-07 FFT2633 BWI → ATL Jul 7, 11:13 UTCJul 7, 12:44 UTC1h 31m
2026-07-07 FFT4712 ATL → BWI Jul 7, 03:36 UTCJul 7, 04:36 UTC1h 0m
2026-07-07 FFT4712 - Jul 7, 03:15 UTCJul 7, 03:20 UTC5m
2026-07-07 FFT3083 JAX → ATL Jul 7, 00:45 UTCJul 7, 01:35 UTC50m
2026-07-07 FFT3083 JAX → ATL Jul 7, 00:41 UTCJul 7, 01:32 UTC51m
2026-07-06 FFT1550 - Jul 6, 22:35 UTCJul 6, 23:20 UTC45m
2026-07-06 FFT3600 DEN → ATL Jul 6, 18:20 UTCJul 6, 20:50 UTC2h 30m
2026-07-06 FFT1449 ATL → DEN Jul 6, 12:40 UTCJul 6, 15:15 UTC2h 35m
2026-07-06 FFT9878 MCO → ATL Jul 6, 10:15 UTCJul 6, 11:10 UTC55m
2026-07-05 FFT2511 - Jul 5, 17:40 UTCJul 5, 19:45 UTC2h 5m
2026-07-05 FFT2512 MCO → EWR Jul 5, 13:30 UTCJul 5, 15:55 UTC2h 25m
2026-07-05 FFT2668 - Jul 5, 09:45 UTCJul 5, 11:50 UTC2h 5m

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 N678FR page for operator, model, and routing details .

Mode-S A8F9FD frequently asked

What is Mode-S code A8F9FD?
A8F9FD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N678FR.
Where is Mode-S A8F9FD registered?
Mode-S code A8F9FD 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 A8F9FD broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8F9FD, octal 52174775, decimal 11,074,045.
What flights does A8F9FD operate?
Mode-S A8F9FD has broadcast 20 distinct callsigns, including FFT1225, FFT9578, FFT2609, FFT2082, FFT2008.