Apparatus

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sensors Mode-S transponder

A8785B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N645FR · operated by WILMINGTON TRUST CO TRUSTEE

Hex
A8785B
Octal
52074133
Decimal
11,040,859
Country
US
Tail
N645FR
Type
A21N
No current signal · last broadcast 1h ago
Flights observed
475
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A8785B.

Country allocation

The ICAO 24-bit address A8785B 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
FFT4113 - 10 2026-07-10
FFT2407 - 8 2026-07-06
FFT3378 - 6 2026-06-27
FFT1896 - 6 2026-07-08
FFT4671 - 5 2026-07-10
FFT4211 Frontier Airlines 5 2026-06-14
FFT2408 Frontier Airlines 5 2026-06-21
FFT1958 - 5 2026-07-09
FFT1703 - 5 2026-07-08
FFT4949 Frontier Airlines 4 2026-07-01
FFT4712 - 4 2026-07-12
FFT4702 Frontier Airlines 4 2026-06-15
FFT4278 - 4 2026-07-05
FFT4277 - 4 2026-07-05
FFT4184 - 4 2026-07-09
FFT3394 Frontier Airlines 4 2026-07-01
FFT3108 - 4 2026-07-07
FFT2428 - 4 2026-07-10
FFT2070 Frontier Airlines 4 2026-07-03
FFT1957 - 4 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 FFT2636 STL → MCO Jul 14, 21:20 UTCJul 14, 23:20 UTC1h 59m
2026-07-14 FFT87 CUN → STL Jul 14, 16:15 UTCJul 14, 19:00 UTC2h 45m
2026-07-14 FFT44 - Jul 14, 11:15 UTCJul 14, 14:20 UTC3h 5m
2026-07-14 FFT3345 - Jul 14, 01:10 UTCJul 14, 03:45 UTC2h 35m
2026-07-13 FFT3345 - Jul 13, 23:25 UTCJul 13, 23:40 UTC15m
2026-07-13 FFT4420 - Jul 13, 21:05 UTCJul 13, 21:20 UTC15m
2026-07-13 FFT4420 - Jul 13, 18:00 UTCJul 13, 18:45 UTC45m
2026-07-13 FFT4420 BDL → SJU Jul 13, 17:55 UTCJul 13, 21:15 UTC3h 20m
2026-07-13 FFT3937 - Jul 13, 15:30 UTCJul 13, 16:20 UTC50m
2026-07-13 FFT3937 - Jul 13, 12:50 UTCJul 13, 13:05 UTC15m
2026-07-13 FFT1226 - Jul 13, 03:55 UTCJul 13, 04:15 UTC20m
2026-07-13 FFT1226 - Jul 13, 00:50 UTCJul 13, 02:20 UTC1h 30m
2026-07-12 FFT1225 - Jul 12, 22:10 UTCJul 12, 22:50 UTC40m
2026-07-12 FFT1225 - Jul 12, 19:50 UTCJul 12, 20:01 UTC10m
2026-07-12 FFT2082 ATL → SJU Jul 12, 14:45 UTCJul 12, 18:05 UTC3h 20m
2026-07-12 FFT2633 - Jul 12, 10:50 UTCJul 12, 12:15 UTC1h 25m
2026-07-12 FFT4712 ATL → BWI Jul 12, 03:26 UTCJul 12, 05:00 UTC1h 34m
2026-07-12 FFT4712 ATL → BWI Jul 12, 03:35 UTCJul 12, 05:01 UTC1h 25m
2026-07-11 FFT2871 - Jul 11, 21:30 UTCJul 12, 00:55 UTC3h 25m
2026-07-11 FFT1166 - Jul 11, 19:20 UTCJul 11, 19:40 UTC20m
2026-07-11 FFT1166 - Jul 11, 16:30 UTCJul 11, 17:10 UTC40m
2026-07-11 FFT1015 - Jul 11, 13:15 UTCJul 11, 14:10 UTC55m
2026-07-11 FFT1015 - Jul 11, 10:50 UTCJul 11, 11:05 UTC15m
2026-07-11 FFT240 - Jul 11, 02:05 UTCJul 11, 02:15 UTC10m
2026-07-11 FFT240 PUJ → SJU Jul 11, 01:43 UTCJul 11, 02:15 UTC32m
2026-07-10 FFT241 - Jul 10, 23:30 UTCJul 10, 23:40 UTC10m
2026-07-10 FFT38 - Jul 10, 21:30 UTCJul 10, 21:40 UTC10m
2026-07-10 FFT38 PUJ → SJU Jul 10, 20:54 UTCJul 10, 21:40 UTC46m
2026-07-10 FFT6 - Jul 10, 15:35 UTCJul 10, 17:15 UTC1h 40m
2026-07-10 FFT4473 ATL → STL Jul 10, 12:35 UTCJul 10, 14:00 UTC1h 25m
2026-07-10 FFT2428 LAS → ATL Jul 10, 07:45 UTCJul 10, 11:20 UTC3h 35m
2026-07-10 FFT4113 PHX → LAS Jul 10, 05:05 UTCJul 10, 05:45 UTC40m
2026-07-10 FFT4671 - Jul 10, 00:00 UTCJul 10, 03:25 UTC3h 25m
2026-07-09 FFT1958 - Jul 9, 20:10 UTCJul 9, 22:30 UTC2h 20m
2026-07-09 FFT4184 - Jul 9, 16:25 UTCJul 9, 18:35 UTC2h 10m
2026-07-09 FFT4578 - Jul 9, 00:05 UTCJul 9, 01:00 UTC55m
2026-07-08 FFT1571 - Jul 8, 21:45 UTCJul 8, 22:35 UTC50m
2026-07-08 FFT1703 - Jul 8, 17:45 UTCJul 8, 19:55 UTC2h 10m
2026-07-08 FFT1703 IAH → PHX Jul 8, 17:38 UTCJul 8, 19:54 UTC2h 16m
2026-07-08 FFT1957 - Jul 8, 13:20 UTCJul 8, 15:45 UTC2h 25m
2026-07-08 FFT1957 DTW → IAH Jul 8, 13:03 UTCJul 8, 15:43 UTC2h 40m
2026-07-08 FFT4392 PHX → DTW Jul 8, 07:40 UTCJul 8, 11:15 UTC3h 35m
2026-07-08 FFT1896 LAS → PHX Jul 8, 05:15 UTCJul 8, 06:00 UTC45m
2026-07-08 FFT2017 STL → LAS Jul 8, 00:50 UTCJul 8, 03:40 UTC2h 50m
2026-07-07 FFT3108 LAS → STL Jul 7, 19:55 UTCJul 7, 22:45 UTC2h 50m
2026-07-07 FFT3108 LAS → STL Jul 7, 19:53 UTCJul 7, 22:41 UTC2h 48m
2026-07-07 FFT3231 - Jul 7, 13:20 UTCJul 7, 16:55 UTC3h 35m
2026-07-07 FFT4966 LAS → CLE Jul 7, 07:40 UTCJul 7, 11:15 UTC3h 35m
2026-07-07 FFT4156 - Jul 7, 04:40 UTCJul 7, 05:45 UTC1h 5m
2026-07-07 FFT3801 LAS → SFO Jul 7, 02:15 UTCJul 7, 03:20 UTC1h 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 N645FR page for operator, model, and routing details .

Mode-S A8785B frequently asked

What is Mode-S code A8785B?
A8785B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N645FR.
Where is Mode-S A8785B registered?
Mode-S code A8785B 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 A8785B broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8785B, octal 52074133, decimal 11,040,859.
What flights does A8785B operate?
Mode-S A8785B has broadcast 20 distinct callsigns, including FFT4113, FFT2407, FFT3378, FFT1896, FFT4671.