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
Broadcasting now · callsign FFT1822 · 35,000 ft
Flights observed
200
Distinct callsigns
20
Country
US
Last broadcast
34m ago

Current position

A8F28F is currently broadcasting. Map zoomed to live position.

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
FFT2112 Frontier Airlines 5 2026-05-25
FFT4455 Frontier Airlines 4 2026-05-22
FFT3480 Frontier Airlines 4 2026-05-19
FFT2111 Frontier Airlines 4 2026-05-21
FFT4954 Frontier Airlines 3 2026-05-21
FFT4440 Frontier Airlines 3 2026-05-16
FFT4353 Frontier Airlines 3 2026-05-15
FFT3856 Frontier Airlines 3 2026-05-10
FFT3284 Frontier Airlines 3 2026-06-03
FFT2932 Frontier Airlines 3 2026-05-21
FFT2861 Frontier Airlines 3 2026-05-18
FFT2609 Frontier Airlines 3 2026-05-20
FFT2440 Frontier Airlines 3 2026-05-28
FFT2225 Frontier Airlines 3 2026-05-28
FFT2206 Frontier Airlines 3 2026-05-24
FFT1595 Frontier Airlines 3 2026-05-25
FFT1442 Frontier Airlines 3 2026-05-24
FFT1203 Frontier Airlines 3 2026-05-20
FFT4990 Frontier Airlines 2 2026-05-11
FFT4916 Frontier Airlines 2 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 FFT1822 LAS → CLE Jun 5, 07:35 UTCJun 5, 07:45 UTC10m
2026-06-04 FFT4758 ONT → LAS Jun 4, 22:40 UTCJun 4, 23:25 UTC45m
2026-06-04 FFT4758 ONT → LAS Jun 4, 22:43 UTCJun 4, 23:17 UTC34m
2026-06-04 FFT2276 SEA → ONT Jun 4, 19:20 UTCJun 4, 21:20 UTC2h 0m
2026-06-04 FFT2407 LAS → SEA Jun 4, 15:00 UTCJun 4, 17:30 UTC2h 30m
2026-06-04 FFT4113 PHX → LAS Jun 4, 05:40 UTCJun 4, 06:19 UTC39m
2026-06-04 FFT4113 PHX → LAS Jun 4, 05:40 UTCJun 4, 06:20 UTC40m
2026-06-04 FFT2638 SFO → PHX Jun 4, 02:20 UTCJun 4, 03:55 UTC1h 35m
2026-06-03 FFT3393 SLC → SFO Jun 3, 23:05 UTCJun 4, 00:55 UTC1h 50m
2026-06-03 FFT3393 SLC → SFO Jun 3, 22:45 UTCJun 4, 00:39 UTC1h 54m
2026-06-03 FFT2526 PHX → SLC Jun 3, 20:10 UTCJun 3, 21:25 UTC1h 15m
2026-06-03 FFT4655 DFW → PHX Jun 3, 16:35 UTCJun 3, 18:35 UTC2h 0m
2026-06-03 FFT3284 PHX → DFW Jun 3, 13:05 UTCJun 3, 15:05 UTC2h 0m
2026-06-03 FFT3284 PHX → DFW Jun 3, 13:13 UTCJun 3, 15:04 UTC1h 51m
2026-06-03 FFT4753 DEN → PHX Jun 3, 07:00 UTCJun 3, 08:25 UTC1h 25m
2026-06-03 FFT3725 CVG → DEN Jun 3, 00:50 UTCJun 3, 03:20 UTC2h 30m
2026-06-02 FFT3286 DEN → CVG Jun 2, 21:30 UTCJun 2, 23:40 UTC2h 10m
2026-06-02 FFT1748 MSY → PHL Jun 2, 18:45 UTCJun 2, 20:10 UTC1h 25m
2026-06-02 FFT4765 DEN → PHX Jun 2, 02:35 UTCJun 2, 04:10 UTC1h 35m
2026-06-01 FFT2142 LAS → PHL Jun 1, 23:35 UTCJun 1, 23:45 UTC10m
2026-06-01 FFT2142 LAS → PHL Jun 1, 23:30 UTCJun 2, 00:51 UTC1h 21m
2026-06-01 FFT4578 SAN → PHX Jun 1, 21:05 UTCJun 1, 22:00 UTC55m
2026-06-01 FFT1571 PHX → SAN Jun 1, 18:39 UTCJun 1, 19:51 UTC1h 12m
2026-06-01 FFT1571 PHX → SAN Jun 1, 19:05 UTCJun 1, 19:55 UTC50m
2026-06-01 FFT2141 PHL → LAS Jun 1, 15:25 UTCJun 1, 16:55 UTC1h 30m
2026-06-01 FFT1376 PHX → DEN Jun 1, 12:25 UTCJun 1, 13:40 UTC1h 15m
2026-06-01 FFT3644 LAX → PHX Jun 1, 05:20 UTCJun 1, 06:15 UTC55m
2026-06-01 FFT2133 PHX → LAS Jun 1, 02:50 UTCJun 1, 03:50 UTC1h 0m
2026-05-31 FFT2531 DFW → PHX May 31, 23:05 UTCJun 1, 01:15 UTC2h 10m
2026-05-31 FFT3284 PHX → DFW May 31, 19:15 UTCMay 31, 21:10 UTC1h 55m
2026-05-31 FFT1085 MCO → PHX May 31, 13:00 UTCMay 31, 17:10 UTC4h 10m
2026-05-31 FFT2170 PDX → LAS May 31, 08:25 UTCMay 31, 10:05 UTC1h 40m
2026-05-30 FFT4346 LAX → DEN May 30, 23:45 UTCMay 31, 01:11 UTC1h 26m
2026-05-30 FFT2341 RDU → ATL May 30, 20:20 UTCMay 30, 22:30 UTC2h 10m
2026-05-30 FFT3440 SFO → DEN May 30, 16:30 UTCMay 30, 18:25 UTC1h 55m
2026-05-30 FFT1093 ISP → MCO May 30, 12:25 UTCMay 30, 14:35 UTC2h 10m
2026-05-29 FFT3406 SEA → DEN May 29, 23:30 UTCMay 30, 01:55 UTC2h 25m
2026-05-29 FFT1175 PHL → MCO May 29, 18:10 UTCMay 29, 20:30 UTC2h 20m
2026-05-29 FFT3156 LAX → DEN May 29, 13:35 UTCMay 29, 15:25 UTC1h 50m
2026-05-29 FFT4345 DEN → LAX May 29, 04:50 UTCMay 29, 06:55 UTC2h 5m
2026-05-29 FFT3707 SAT → DEN May 29, 01:00 UTCMay 29, 02:50 UTC1h 50m
2026-05-29 FFT3707 SAT → DEN May 29, 01:07 UTCMay 29, 02:45 UTC1h 38m
2026-05-28 FFT2356 RSW → PHL May 28, 21:55 UTCMay 28, 23:35 UTC1h 40m
2026-05-28 FFT2225 RDU → DEN May 28, 16:35 UTCMay 28, 19:45 UTC3h 10m
2026-05-28 FFT2440 SEA → PHX May 28, 12:20 UTCMay 28, 15:10 UTC2h 50m
2026-05-28 FFT2440 SEA → PHX May 28, 12:16 UTCMay 28, 15:07 UTC2h 51m
2026-05-28 FFT1483 ORD → DEN May 28, 03:35 UTCMay 28, 05:30 UTC1h 55m
2026-05-28 FFT1483 ORD → DEN May 28, 03:15 UTCMay 28, 05:25 UTC2h 10m
2026-05-27 FFT3174 CLE → PHL May 27, 23:10 UTCMay 28, 01:15 UTC2h 5m
2026-05-27 FFT2225 RDU → DEN May 27, 16:30 UTCMay 27, 19:30 UTC3h 0m

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?
Yes. Mode-S A8F28F is currently airborne.
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 FFT2112, FFT4455, FFT3480, FFT2111, FFT4954.