Apparatus

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sensors Mode-S transponder

A84D25

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N634FR · AIRBUS A-321neo · operated by BANK OF UTAH TRUSTEE

Hex
A84D25
Octal
52046445
Decimal
11,029,797
Country
US
Tail
N634FR
Type
A21N
No current signal · last broadcast 1d ago
Flights observed
488
Distinct callsigns
20
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A84D25.

Country allocation

The ICAO 24-bit address A84D25 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
FFT1703 - 8 2026-07-12
FFT3308 Frontier Airlines 7 2026-06-28
FFT1957 - 7 2026-07-12
FFT1896 - 7 2026-07-12
FFT1466 Frontier Airlines 7 2026-06-28
FFT1191 - 7 2026-07-12
FFT4402 Frontier Airlines 6 2026-06-29
FFT3801 - 6 2026-06-28
FFT4968 - 5 2026-06-22
FFT4593 Frontier Airlines 5 2026-06-29
FFT3231 - 5 2026-07-03
FFT2264 - 5 2026-07-05
FFT2069 Frontier Airlines 5 2026-07-05
FFT1958 Frontier Airlines 5 2026-06-12
FFT1325 Frontier Airlines 5 2026-06-28
FFT3406 Frontier Airlines 4 2026-06-21
FFT3394 - 4 2026-07-13
FFT3316 - 4 2026-07-05
FFT2015 - 4 2026-06-22
FFT1590 - 4 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 FFT4949 SLC → SLC Jul 13, 03:30 UTCJul 13, 04:10 UTC40m
2026-07-13 FFT3394 - Jul 13, 00:50 UTCJul 13, 02:10 UTC1h 20m
2026-07-12 FFT1191 PHX → SFO Jul 12, 21:40 UTCJul 12, 23:10 UTC1h 30m
2026-07-12 FFT1703 - Jul 12, 17:45 UTCJul 12, 19:50 UTC2h 5m
2026-07-12 FFT1957 - Jul 12, 13:40 UTCJul 12, 16:01 UTC2h 20m
2026-07-12 FFT4392 - Jul 12, 07:31 UTCJul 12, 11:01 UTC3h 30m
2026-07-12 FFT1896 LAS → PHX Jul 12, 05:10 UTCJul 12, 05:55 UTC45m
2026-07-11 FFT3913 MCO → LAS Jul 11, 23:20 UTCJul 12, 03:30 UTC4h 10m
2026-07-11 FFT1418 - Jul 11, 19:05 UTCJul 11, 21:05 UTC2h 0m
2026-07-11 FFT1741 - Jul 11, 14:25 UTCJul 11, 16:45 UTC2h 20m
2026-07-11 FFT1040 MCO → RDU Jul 11, 11:40 UTCJul 11, 13:00 UTC1h 20m
2026-07-11 FFT1040 MCO → RDU Jul 11, 11:34 UTCJul 11, 13:00 UTC1h 26m
2026-07-11 FFT3508 ATL → MCO Jul 11, 02:10 UTCJul 11, 03:15 UTC1h 5m
2026-07-10 FFT4025 MCO → ATL Jul 10, 22:25 UTCJul 10, 23:30 UTC1h 5m
2026-07-10 FFT2769 - Jul 10, 16:50 UTCJul 10, 19:10 UTC2h 20m
2026-07-10 FFT1684 - Jul 10, 13:10 UTCJul 10, 15:20 UTC2h 10m
2026-07-10 FFT1086 PHX → MCO Jul 10, 07:20 UTCJul 10, 11:10 UTC3h 50m
2026-07-10 FFT4949 SLC → PHX Jul 10, 03:45 UTCJul 10, 04:55 UTC1h 10m
2026-07-10 FFT3394 OAK → SLC Jul 10, 01:25 UTCJul 10, 02:40 UTC1h 15m
2026-07-10 FFT3394 SFO → SLC Jul 10, 01:10 UTCJul 10, 02:39 UTC1h 29m
2026-07-09 FFT1191 PHX → SFO Jul 9, 22:13 UTCJul 9, 23:51 UTC1h 38m
2026-07-09 FFT1191 PHX → SFO Jul 9, 22:20 UTCJul 10, 00:15 UTC1h 55m
2026-07-09 FFT1703 - Jul 9, 17:05 UTCJul 9, 19:15 UTC2h 10m
2026-07-09 FFT1703 IAH → PHX Jul 9, 17:04 UTCJul 9, 19:10 UTC2h 6m
2026-07-09 FFT1957 - Jul 9, 13:10 UTCJul 9, 15:30 UTC2h 20m
2026-07-09 FFT4392 PHX → DTW Jul 9, 07:35 UTCJul 9, 11:15 UTC3h 40m
2026-07-09 FFT1896 LAS → PHX Jul 9, 05:30 UTCJul 9, 06:15 UTC45m
2026-07-09 FFT1896 LAS → PHX Jul 9, 05:23 UTCJul 9, 06:13 UTC50m
2026-07-08 FFT3913 - Jul 8, 23:05 UTCJul 9, 03:15 UTC4h 10m
2026-07-08 FFT1418 - Jul 8, 19:40 UTCJul 8, 21:35 UTC1h 55m
2026-07-08 FFT1741 - Jul 8, 15:20 UTCJul 8, 17:35 UTC2h 15m
2026-07-08 FFT1040 MCO → RDU Jul 8, 11:45 UTCJul 8, 13:05 UTC1h 20m
2026-07-08 FFT1954 MCO → MCO Jul 8, 03:35 UTCJul 8, 09:35 UTC6h 0m
2026-07-07 FFT1540 - Jul 7, 23:05 UTCJul 8, 01:00 UTC1h 55m
2026-07-07 FFT4837 MCO → IND Jul 7, 19:55 UTCJul 7, 21:50 UTC1h 55m
2026-07-07 FFT1977 - Jul 7, 14:25 UTCJul 7, 17:05 UTC2h 40m
2026-07-07 FFT1978 MCO → BOS Jul 7, 10:10 UTCJul 7, 12:40 UTC2h 30m
2026-07-07 FFT2981 - Jul 7, 03:35 UTCJul 7, 04:20 UTC45m
2026-07-07 FFT2981 - Jul 7, 01:50 UTCJul 7, 02:05 UTC15m
2026-07-06 FFT2868 MCO → SJU Jul 6, 21:50 UTCJul 7, 00:25 UTC2h 35m
2026-07-06 FFT2511 EWR → MCO Jul 6, 16:05 UTCJul 6, 18:15 UTC2h 10m
2026-07-06 FFT2512 MCO → EWR Jul 6, 11:53 UTCJul 6, 14:25 UTC2h 32m
2026-07-06 FFT2512 MCO → EWR Jul 6, 12:00 UTCJul 6, 14:30 UTC2h 30m
2026-07-06 FFT1876 LAS → MCO Jul 6, 06:10 UTCJul 6, 10:10 UTC4h 0m
2026-07-06 FFT1647 DFW → LAS Jul 6, 02:05 UTCJul 6, 04:40 UTC2h 35m
2026-07-05 FFT1052 LAS → DFW Jul 5, 21:35 UTCJul 6, 00:00 UTC2h 25m
2026-07-05 FFT1051 DFW → LAS Jul 5, 17:30 UTCJul 5, 19:45 UTC2h 15m
2026-07-05 FFT3978 LAS → DFW Jul 5, 13:35 UTCJul 5, 15:45 UTC2h 10m
2026-07-05 FFT2264 - Jul 5, 05:45 UTCJul 5, 06:30 UTC45m
2026-07-05 FFT3316 - Jul 5, 02:50 UTCJul 5, 03:55 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 N634FR page for operator, model, and routing details .

Mode-S A84D25 frequently asked

What is Mode-S code A84D25?
A84D25 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N634FR.
Where is Mode-S A84D25 registered?
Mode-S code A84D25 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 A84D25 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A84D25, octal 52046445, decimal 11,029,797.
What flights does A84D25 operate?
Mode-S A84D25 has broadcast 20 distinct callsigns, including FFT1703, FFT3308, FFT1957, FFT1896, FFT1466.