Apparatus

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sensors Mode-S transponder

A8FDB4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N679FR · operated by FRONTIER AIRLINES INC.

Hex
A8FDB4
Octal
52176664
Decimal
11,074,996
Country
US
Tail
N679FR
Transponder active on ground
Flights observed
325
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:35 UTC

Last known position

Most recent position reported by Mode-S A8FDB4.

Country allocation

The ICAO 24-bit address A8FDB4 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
FFT2715 Frontier Airlines 6 2026-07-20
FFT2266 - 5 2026-07-01
FFT4726 Frontier Airlines 4 2026-06-09
FFT33 - 4 2026-06-18
FFT2338 Frontier Airlines 4 2026-07-20
FFT1495 Frontier Airlines 4 2026-06-11
FFT4410 Frontier Airlines 3 2026-07-25
FFT4277 - 3 2026-07-22
FFT3937 Frontier Airlines 3 2026-07-07
FFT3736 Frontier Airlines 3 2026-06-01
FFT3068 Frontier Airlines 3 2026-06-11
FFT2982 Frontier Airlines 3 2026-06-07
FFT2886 - 3 2026-07-06
FFT2867 Frontier Airlines 3 2026-06-07
FFT239 Frontier Airlines 3 2026-06-18
FFT2275 Frontier Airlines 3 2026-07-22
FFT2082 - 3 2026-07-04
FFT1670 Frontier Airlines 3 2026-07-24
FFT1541 - 3 2026-07-15
FFT1483 - 3 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT2695 BWI → DFW Jul 26, 22:15 UTCJul 26, 22:35 UTC20m
2026-07-26 FFT38 PUJ → SJU Jul 26, 20:20 UTCJul 26, 20:30 UTC10m
2026-07-26 FFT32 DEN → CLE Jul 26, 14:15 UTCJul 26, 16:20 UTC2h 5m
2026-07-26 FFT2717 FLL → ATL Jul 26, 11:05 UTCJul 26, 12:30 UTC1h 25m
2026-07-26 FFT2717 FLL → ATL Jul 26, 01:55 UTCJul 26, 03:15 UTC1h 20m
2026-07-25 FFT2959 IAD → FLL Jul 25, 22:20 UTCJul 26, 00:30 UTC2h 10m
2026-07-25 FFT4410 ATL → IAD Jul 25, 19:15 UTCJul 25, 20:40 UTC1h 25m
2026-07-25 FFT4410 ATL → IAD Jul 25, 19:15 UTCJul 25, 20:31 UTC1h 16m
2026-07-25 FFT1669 CVG → MCO Jul 25, 16:20 UTCJul 25, 17:25 UTC1h 5m
2026-07-25 FFT3057 BOS → RDU Jul 25, 12:55 UTCJul 25, 14:35 UTC1h 40m
2026-07-25 FFT3512 ATL → BOS Jul 25, 09:15 UTCJul 25, 11:20 UTC2h 5m
2026-07-25 FFT3013 FLL → ATL Jul 25, 02:25 UTCJul 25, 03:45 UTC1h 20m
2026-07-24 FFT2959 IAD → FLL Jul 24, 23:05 UTCJul 25, 01:05 UTC2h 0m
2026-07-24 FFT4410 ATL → IAD Jul 24, 20:20 UTCJul 24, 21:45 UTC1h 25m
2026-07-24 FFT3071 ORF → ATL Jul 24, 16:50 UTCJul 24, 18:10 UTC1h 20m
2026-07-24 FFT3072 ATL → ORF Jul 24, 14:10 UTCJul 24, 15:30 UTC1h 20m
2026-07-24 FFT4797 RDU → ATL Jul 24, 10:30 UTCJul 24, 11:00 UTC30m
2026-07-24 FFT4797 RDU → ATL Jul 24, 10:29 UTCJul 24, 11:23 UTC54m
2026-07-24 FFT1670 MCO → CVG Jul 24, 03:25 UTCJul 24, 04:25 UTC1h 0m
2026-07-23 FFT4702 AUS → ATL Jul 23, 23:10 UTCJul 24, 01:15 UTC2h 5m
2026-07-23 FFT4211 ATL → AUS Jul 23, 20:00 UTCJul 23, 21:50 UTC1h 50m
2026-07-23 FFT1407 BUF → ATL Jul 23, 16:30 UTCJul 23, 18:20 UTC1h 50m
2026-07-23 FFT1408 ATL → BUF Jul 23, 13:45 UTCJul 23, 15:20 UTC1h 35m
2026-07-23 FFT2428 LAS → ATL Jul 23, 08:10 UTCJul 23, 11:40 UTC3h 30m
2026-07-23 FFT2408 SEA → LAS Jul 23, 03:40 UTCJul 23, 05:50 UTC2h 10m
2026-07-22 FFT2275 ONT → SEA Jul 22, 23:10 UTCJul 23, 01:15 UTC2h 5m
2026-07-22 FFT1357 LAS → ONT Jul 22, 21:18 UTCJul 22, 22:04 UTC46m
2026-07-22 FFT1357 LAS → ONT Jul 22, 21:30 UTCJul 22, 22:10 UTC40m
2026-07-22 FFT4277 IAD → LAS Jul 22, 15:00 UTCJul 22, 19:20 UTC4h 20m
2026-07-22 FFT4277 IAD → LAS Jul 22, 14:03 UTCJul 22, 19:30 UTC5h 27m
2026-07-22 FFT4278 SAN → DFW Jul 22, 10:20 UTCJul 22, 12:10 UTC1h 50m
2026-07-21 FFT4131 - Jul 21, 21:05 UTCJul 21, 23:35 UTC2h 30m
2026-07-21 FFT1490 - Jul 21, 19:00 UTCJul 21, 19:40 UTC40m
2026-07-21 FFT1333 TPA → DFW Jul 21, 14:40 UTCJul 21, 16:50 UTC2h 10m
2026-07-21 FFT3679 CLE → TPA Jul 21, 10:45 UTCJul 21, 12:45 UTC2h 0m
2026-07-20 FFT4036 ATL → CLE Jul 20, 23:20 UTCJul 21, 00:40 UTC1h 19m
2026-07-20 FFT2409 CLE → ATL Jul 20, 19:55 UTCJul 20, 21:10 UTC1h 15m
2026-07-20 FFT2715 RSW → CLE Jul 20, 15:45 UTCJul 20, 18:10 UTC2h 25m
2026-07-20 FFT2338 MSY → PHL Jul 20, 12:00 UTCJul 20, 14:05 UTC2h 5m
2026-07-20 FFT4135 MIA → CLE Jul 20, 01:00 UTCJul 20, 03:20 UTC2h 20m
2026-07-19 FFT3026 CLE → MIA Jul 19, 20:50 UTCJul 19, 23:15 UTC2h 25m
2026-07-19 FFT3026 CLE → MIA Jul 19, 20:38 UTCJul 19, 23:11 UTC2h 33m
2026-07-18 FFT4036 - Jul 18, 23:45 UTCJul 19, 01:05 UTC1h 20m
2026-07-18 FFT2409 - Jul 18, 20:00 UTCJul 18, 21:35 UTC1h 35m
2026-07-18 FFT2715 RSW → CLE Jul 18, 16:05 UTCJul 18, 18:20 UTC2h 15m
2026-07-18 FFT2338 MSY → PHL Jul 18, 12:15 UTCJul 18, 14:35 UTC2h 20m
2026-07-17 FFT3568 - Jul 17, 02:45 UTCJul 17, 02:59 UTC15m
2026-07-17 FFT3568 DFW → CLE Jul 17, 02:36 UTCJul 17, 04:48 UTC2h 12m
2026-07-16 FFT1481 MCO → DFW Jul 16, 22:30 UTCJul 17, 01:05 UTC2h 35m
2026-07-16 FFT4018 - Jul 16, 17:49 UTCJul 16, 20:45 UTC2h 55m

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 N679FR page for operator, model, and routing details .

Mode-S A8FDB4 frequently asked

What is Mode-S code A8FDB4?
A8FDB4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N679FR.
Where is Mode-S A8FDB4 registered?
Mode-S code A8FDB4 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 A8FDB4 broadcasting right now?
Mode-S A8FDB4 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 A8FDB4, octal 52176664, decimal 11,074,996.
What flights does A8FDB4 operate?
Mode-S A8FDB4 has broadcast 20 distinct callsigns, including FFT2715, FFT2266, FFT4726, FFT33, FFT2338.