Apparatus

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sensors Mode-S transponder

A8D635

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N669FR · operated by UMB BANK NA TRUSTEE

Hex
A8D635
Octal
52153065
Decimal
11,064,885
Country
US
Tail
N669FR
Type
A21N
No current signal · last broadcast Jul 26, 18:50 UTC
Flights observed
543
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 18:50 UTC

Last known position

Most recent position reported by Mode-S A8D635.

Country allocation

The ICAO 24-bit address A8D635 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
FFT1342 - 7 2026-06-18
FFT1269 Frontier Airlines 7 2026-07-20
FFT3423 Frontier Airlines 6 2026-07-25
FFT228 Frontier Airlines 6 2026-07-26
FFT3241 Frontier Airlines 5 2026-06-18
FFT3097 Frontier Airlines 5 2026-07-26
FFT2494 Frontier Airlines 5 2026-05-15
FFT2428 Frontier Airlines 5 2026-06-12
FFT229 Frontier Airlines 5 2026-07-26
FFT2174 Frontier Airlines 5 2026-05-23
FFT2173 Frontier Airlines 5 2026-05-23
FFT1949 Frontier Airlines 5 2026-05-04
FFT4963 - 4 2026-07-05
FFT4593 - 4 2026-07-19
FFT45 - 4 2026-06-19
FFT3923 Frontier Airlines 4 2026-04-18
FFT3512 Frontier Airlines 4 2026-06-14
FFT3424 Frontier Airlines 4 2026-07-24
FFT3136 Frontier Airlines 4 2026-06-20
FFT3067 - 4 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 FFT229 CUN → DFW Jul 26, 16:20 UTCJul 26, 18:35 UTC2h 15m
2026-07-26 FFT228 DFW → CUN Jul 26, 12:15 UTCJul 26, 14:35 UTC2h 20m
2026-07-26 FFT3097 ATL → DFW Jul 26, 01:45 UTCJul 26, 03:30 UTC1h 45m
2026-07-26 FFT3097 ATL → DFW Jul 26, 01:20 UTCJul 26, 03:25 UTC2h 5m
2026-07-25 FFT2496 DFW → ATL Jul 25, 21:50 UTCJul 25, 23:35 UTC1h 45m
2026-07-25 FFT229 CUN → DFW Jul 25, 16:30 UTCJul 25, 18:45 UTC2h 15m
2026-07-25 FFT228 DFW → CUN Jul 25, 12:25 UTCJul 25, 14:50 UTC2h 25m
2026-07-25 FFT3423 LGA → DFW Jul 25, 03:05 UTCJul 25, 06:05 UTC3h 0m
2026-07-25 FFT3423 LGA → DFW Jul 25, 03:14 UTCJul 25, 06:01 UTC2h 47m
2026-07-24 FFT3424 DFW → LGA Jul 24, 22:40 UTCJul 25, 01:35 UTC2h 55m
2026-07-24 FFT229 CUN → DFW Jul 24, 16:25 UTCJul 24, 18:40 UTC2h 15m
2026-07-24 FFT228 DFW → CUN Jul 24, 12:15 UTCJul 24, 14:35 UTC2h 20m
2026-07-24 FFT3097 ATL → DFW Jul 24, 01:55 UTCJul 24, 03:40 UTC1h 45m
2026-07-23 FFT2496 DFW → ATL Jul 23, 21:45 UTCJul 23, 23:30 UTC1h 45m
2026-07-23 FFT229 CUN → DFW Jul 23, 16:25 UTCJul 23, 18:45 UTC2h 20m
2026-07-23 FFT228 DFW → CUN Jul 23, 12:15 UTCJul 23, 14:39 UTC2h 24m
2026-07-23 FFT228 DFW → CUN Jul 23, 12:20 UTCJul 23, 14:40 UTC2h 20m
2026-07-23 FFT3097 ATL → DFW Jul 23, 02:00 UTCJul 23, 03:35 UTC1h 35m
2026-07-23 FFT3097 ATL → DFW Jul 23, 01:20 UTCJul 23, 03:34 UTC2h 14m
2026-07-22 FFT2496 DFW → ATL Jul 22, 21:55 UTCJul 22, 23:35 UTC1h 40m
2026-07-22 FFT229 CUN → DFW Jul 22, 16:20 UTCJul 22, 18:35 UTC2h 15m
2026-07-22 FFT228 DFW → CUN Jul 22, 12:20 UTCJul 22, 14:40 UTC2h 20m
2026-07-22 FFT2564 LAX → DFW Jul 22, 01:40 UTCJul 22, 04:15 UTC2h 35m
2026-07-21 FFT1755 IAH → LAX Jul 21, 21:15 UTCJul 22, 00:05 UTC2h 50m
2026-07-21 FFT2412 ONT → IAH Jul 21, 16:40 UTCJul 21, 19:30 UTC2h 50m
2026-07-21 FFT4689 DFW → ONT Jul 21, 12:45 UTCJul 21, 15:10 UTC2h 25m
2026-07-21 FFT3423 LGA → DFW Jul 21, 03:20 UTCJul 21, 06:10 UTC2h 50m
2026-07-20 FFT3424 DFW → LGA Jul 20, 22:50 UTCJul 21, 01:55 UTC3h 5m
2026-07-20 FFT1269 ATL → DFW Jul 20, 18:55 UTCJul 20, 20:35 UTC1h 40m
2026-07-20 FFT1269 ATL → DFW Jul 20, 18:55 UTCJul 20, 20:33 UTC1h 38m
2026-07-20 FFT3022 DFW → ATL Jul 20, 15:15 UTCJul 20, 17:00 UTC1h 45m
2026-07-20 FFT1341 ORD → DFW Jul 20, 03:05 UTCJul 20, 04:50 UTC1h 45m
2026-07-20 FFT1341 ORD → DFW Jul 20, 02:49 UTCJul 20, 04:48 UTC1h 59m
2026-07-19 FFT3242 DFW → ORD Jul 19, 23:20 UTCJul 20, 01:20 UTC2h 0m
2026-07-19 FFT1269 ATL → DFW Jul 19, 19:50 UTCJul 19, 21:30 UTC1h 40m
2026-07-19 FFT1407 BUF → ATL Jul 19, 15:40 UTCJul 19, 17:15 UTC1h 35m
2026-07-19 FFT1408 ATL → BUF Jul 19, 12:35 UTCJul 19, 14:10 UTC1h 35m
2026-07-19 FFT1448 - Jul 19, 06:25 UTCJul 19, 10:40 UTC4h 15m
2026-07-19 FFT4593 - Jul 19, 03:00 UTCJul 19, 03:15 UTC15m
2026-07-19 FFT4593 LAX → SFO Jul 19, 02:55 UTCJul 19, 03:51 UTC56m
2026-07-18 FFT4145 MCO → LAX Jul 18, 19:45 UTCJul 19, 00:20 UTC4h 35m
2026-07-18 FFT1977 - Jul 18, 14:30 UTCJul 18, 17:00 UTC2h 30m
2026-07-18 FFT1978 MCO → BOS Jul 18, 10:10 UTCJul 18, 12:45 UTC2h 35m
2026-07-18 FFT3505 - Jul 18, 05:20 UTCJul 18, 07:45 UTC2h 25m
2026-07-18 FFT1746 MCO → SJU Jul 18, 01:34 UTCJul 18, 04:10 UTC2h 36m
2026-07-18 FFT1746 MCO → SJU Jul 18, 01:13 UTCJul 18, 04:05 UTC2h 52m
2026-07-17 FFT3663 - Jul 17, 21:15 UTCJul 17, 23:05 UTC1h 50m
2026-07-17 FFT1516 - Jul 17, 16:59 UTCJul 17, 18:05 UTC1h 5m
2026-07-17 FFT2529 MCO → DTW Jul 17, 13:45 UTCJul 17, 15:49 UTC2h 5m
2026-07-17 FFT2529 MCO → DTW Jul 17, 13:31 UTCJul 17, 15:49 UTC2h 18m

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 N669FR page for operator, model, and routing details .

Mode-S A8D635 frequently asked

What is Mode-S code A8D635?
A8D635 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N669FR.
Where is Mode-S A8D635 registered?
Mode-S code A8D635 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 A8D635 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8D635, octal 52153065, decimal 11,064,885.
What flights does A8D635 operate?
Mode-S A8D635 has broadcast 20 distinct callsigns, including FFT1342, FFT1269, FFT3423, FFT228, FFT3241.