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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
Transponder active on ground
Flights observed
216
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:15 UTC

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
FFT4455 Frontier Airlines 4 2026-07-19
FFT23 - 4 2026-07-16
FFT1225 - 4 2026-07-08
FFT9578 Frontier Airlines 3 2026-06-15
FFT3856 - 3 2026-07-16
FFT2609 - 3 2026-07-13
FFT2407 Frontier Airlines 3 2026-07-26
FFT2082 - 3 2026-07-14
FFT2008 - 3 2026-07-13
FFT1807 - 3 2026-07-21
FFT1449 Frontier Airlines 3 2026-07-06
FFT1328 - 3 2026-07-20
FFT1150 Frontier Airlines 3 2026-06-23
FFT4949 Frontier Airlines 2 2026-07-04
FFT4807 Frontier Airlines 2 2026-07-20
FFT4712 - 2 2026-07-07
FFT4440 - 2 2026-07-17
FFT4353 - 2 2026-07-16
FFT4161 - 2 2026-07-09
FFT4003 Frontier Airlines 2 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT2276 SEA → ONT Jul 26, 19:25 UTCJul 26, 21:15 UTC1h 50m
2026-07-26 FFT2407 LAS → SEA Jul 26, 15:00 UTCJul 26, 17:00 UTC2h 0m
2026-07-26 FFT3645 AUS → LAS Jul 26, 07:00 UTCJul 26, 07:05 UTC5m
2026-07-25 FFT3645 AUS → LAS Jul 25, 21:10 UTCJul 25, 23:35 UTC2h 25m
2026-07-25 FFT4684 LAS → AUS Jul 25, 17:20 UTCJul 25, 19:45 UTC2h 25m
2026-07-25 FFT2145 PHL → LAS Jul 25, 12:35 UTCJul 25, 15:50 UTC3h 15m
2026-07-25 FFT2146 LAS → ORD Jul 25, 07:25 UTCJul 25, 10:35 UTC3h 10m
2026-07-25 FFT2334 PHX → PHL Jul 25, 04:45 UTCJul 25, 05:35 UTC50m
2026-07-25 FFT2333 LAS → LAX Jul 25, 02:20 UTCJul 25, 03:05 UTC45m
2026-07-24 FFT3777 BNA → LAS Jul 24, 21:00 UTCJul 25, 00:20 UTC3h 20m
2026-07-24 FFT3778 MCO → TTN Jul 24, 16:20 UTCJul 24, 19:40 UTC3h 20m
2026-07-24 FFT3778 MCO → TTN Jul 24, 16:13 UTCJul 24, 19:34 UTC3h 21m
2026-07-24 FFT1184 LAX → LAS Jul 24, 13:42 UTCJul 24, 14:28 UTC46m
2026-07-24 FFT1184 LAX → LAS Jul 24, 13:45 UTCJul 24, 14:30 UTC45m
2026-07-24 FFT2445 ORD → LAX Jul 24, 02:40 UTCJul 24, 06:15 UTC3h 35m
2026-07-23 FFT1595 ATL → ORD Jul 23, 22:45 UTCJul 24, 00:20 UTC1h 35m
2026-07-23 FFT1442 - Jul 23, 19:10 UTCJul 23, 20:30 UTC1h 20m
2026-07-23 FFT2206 - Jul 23, 14:00 UTCJul 23, 16:40 UTC2h 40m
2026-07-23 FFT3017 SJU → FLL Jul 23, 11:50 UTCJul 23, 12:20 UTC30m
2026-07-23 FFT3017 SJU → FLL Jul 23, 10:15 UTCJul 23, 10:30 UTC15m
2026-07-23 FFT4462 PHL → SJU Jul 23, 01:45 UTCJul 23, 05:15 UTC3h 30m
2026-07-22 FFT4404 MCO → PHL Jul 22, 22:15 UTCJul 23, 00:10 UTC1h 55m
2026-07-22 FFT3941 ISP → MCO Jul 22, 15:15 UTCJul 22, 17:35 UTC2h 20m
2026-07-22 FFT3942 MCO → ISP Jul 22, 11:30 UTCJul 22, 13:40 UTC2h 10m
2026-07-21 FFT3767 RIC → MCO Jul 21, 22:15 UTCJul 22, 00:00 UTC1h 45m
2026-07-21 FFT3767 RIC → MCO Jul 21, 22:04 UTCJul 21, 23:48 UTC1h 44m
2026-07-21 FFT3768 MCO → RIC Jul 21, 18:45 UTCJul 21, 20:20 UTC1h 35m
2026-07-21 FFT1807 PHL → MCO Jul 21, 14:00 UTCJul 21, 15:55 UTC1h 55m
2026-07-21 FFT2072 - Jul 21, 00:15 UTCJul 21, 01:10 UTC55m
2026-07-20 FFT1517 PHL → RDU Jul 20, 22:10 UTCJul 20, 23:00 UTC50m
2026-07-20 FFT1517 PHL → RDU Jul 20, 21:46 UTCJul 20, 22:59 UTC1h 13m
2026-07-20 FFT2060 RDU → PHL Jul 20, 19:25 UTCJul 20, 20:25 UTC1h 0m
2026-07-20 FFT2730 TPA → RDU Jul 20, 15:55 UTCJul 20, 17:25 UTC1h 30m
2026-07-20 FFT4807 PHL → TPA Jul 20, 12:25 UTCJul 20, 14:30 UTC2h 5m
2026-07-20 FFT4807 PHL → TPA Jul 20, 11:00 UTCJul 20, 11:10 UTC10m
2026-07-20 FFT1328 - Jul 20, 03:25 UTCJul 20, 04:30 UTC1h 5m
2026-07-20 FFT1328 CLT → PHL Jul 20, 03:11 UTCJul 20, 04:28 UTC1h 17m
2026-07-20 FFT1984 FLL → ISP Jul 20, 00:15 UTCJul 20, 01:45 UTC1h 30m
2026-07-19 FFT4455 PHL → FLL Jul 19, 20:15 UTCJul 19, 22:45 UTC2h 30m
2026-07-19 FFT4455 PHL → FLL Jul 19, 19:55 UTCJul 19, 20:00 UTC5m
2026-07-17 FFT4440 - Jul 17, 02:05 UTCJul 17, 04:14 UTC2h 10m
2026-07-16 FFT1983 - Jul 16, 23:15 UTCJul 17, 00:50 UTC1h 35m
2026-07-16 FFT4353 - Jul 16, 19:55 UTCJul 16, 21:05 UTC1h 10m
2026-07-16 FFT3856 - Jul 16, 16:09 UTCJul 16, 17:14 UTC1h 5m
2026-07-16 FFT3856 MCO → PHL Jul 16, 16:12 UTCJul 16, 18:11 UTC1h 59m
2026-07-16 FFT1807 - Jul 16, 12:34 UTCJul 16, 14:29 UTC1h 55m
2026-07-16 FFT23 - Jul 16, 11:34 UTCJul 16, 11:40 UTC5m
2026-07-15 FFT23 PHL → PHL Jul 15, 22:20 UTCJul 15, 22:25 UTC5m
2026-07-15 FFT23 PHL → PHL Jul 15, 21:10 UTCJul 15, 21:20 UTC10m
2026-07-15 FFT23 - Jul 15, 18:55 UTCJul 15, 20:05 UTC1h 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 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?
Mode-S A8F9FD is currently broadcasting from the ground.
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 FFT4455, FFT23, FFT1225, FFT9578, FFT3856.