Apparatus

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sensors Mode-S transponder

A88737

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N649FR · operated by BANK OF UTAH TRUSTEE

Hex
A88737
Octal
52103467
Decimal
11,044,663
Country
US
Tail
N649FR
Type
A21N
Transponder active on ground
Flights observed
465
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A88737.

Country allocation

The ICAO 24-bit address A88737 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
FFT87 Frontier Airlines 9 2026-04-19
FFT44 Frontier Airlines 9 2026-04-19
FFT2636 Frontier Airlines 7 2026-04-19
FFT2635 - 7 2026-06-28
FFT86 - 6 2026-06-28
FFT4707 - 5 2026-07-08
FFT45 - 5 2026-06-28
FFT3135 - 5 2026-06-28
FFT3025 Frontier Airlines 5 2026-05-04
FFT2205 Frontier Airlines 5 2026-06-12
FFT4404 - 4 2026-06-17
FFT4173 Frontier Airlines 4 2026-06-17
FFT3692 - 4 2026-07-08
FFT3540 Frontier Airlines 4 2026-06-04
FFT2206 Frontier Airlines 4 2026-04-22
FFT1755 Frontier Airlines 4 2026-06-07
FFT152 - 4 2026-07-08
FFT1483 Frontier Airlines 4 2026-06-04
FFT1417 Frontier Airlines 4 2026-04-26
FFT4967 Frontier Airlines 3 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 FFT2017 - Jul 15, 00:15 UTCJul 15, 01:45 UTC1h 30m
2026-07-14 FFT3108 LAS → STL Jul 14, 19:45 UTCJul 14, 22:45 UTC2h 59m
2026-07-14 FFT2408 - Jul 14, 07:25 UTCJul 14, 09:35 UTC2h 10m
2026-07-14 FFT2275 ONT → SEA Jul 14, 03:50 UTCJul 14, 05:45 UTC1h 55m
2026-07-14 FFT1357 LAS → ONT Jul 14, 02:20 UTCJul 14, 02:55 UTC35m
2026-07-13 FFT1051 DFW → LAS Jul 13, 19:25 UTCJul 13, 21:40 UTC2h 15m
2026-07-13 FFT3978 LAS → DFW Jul 13, 15:30 UTCJul 13, 17:50 UTC2h 20m
2026-07-13 FFT3417 - Jul 13, 02:45 UTCJul 13, 05:01 UTC2h 15m
2026-07-12 FFT3418 - Jul 12, 23:15 UTCJul 13, 01:35 UTC2h 20m
2026-07-12 FFT4131 - Jul 12, 18:40 UTCJul 12, 21:10 UTC2h 30m
2026-07-12 FFT4131 IAH → LAS Jul 12, 18:30 UTCJul 12, 21:10 UTC2h 40m
2026-07-12 FFT1490 - Jul 12, 14:10 UTCJul 12, 16:45 UTC2h 35m
2026-07-12 FFT4113 PHX → LAS Jul 12, 05:40 UTCJul 12, 06:15 UTC35m
2026-07-12 FFT4949 SLC → PHX Jul 12, 03:20 UTCJul 12, 04:35 UTC1h 15m
2026-07-12 FFT4949 SLC → PHX Jul 12, 03:22 UTCJul 12, 04:32 UTC1h 10m
2026-07-12 FFT3394 SFO → SLC Jul 12, 00:40 UTCJul 12, 02:05 UTC1h 25m
2026-07-11 FFT1191 PHX → SFO Jul 11, 21:40 UTCJul 11, 23:10 UTC1h 30m
2026-07-11 FFT1703 - Jul 11, 17:35 UTCJul 11, 19:45 UTC2h 10m
2026-07-11 FFT1703 IAH → PHX Jul 11, 17:30 UTCJul 11, 19:52 UTC2h 22m
2026-07-11 FFT1957 - Jul 11, 13:05 UTCJul 11, 16:15 UTC3h 10m
2026-07-11 FFT4392 - Jul 11, 07:35 UTCJul 11, 10:50 UTC3h 15m
2026-07-11 FFT1896 - Jul 11, 05:01 UTCJul 11, 05:45 UTC45m
2026-07-11 FFT2017 STL → LAS Jul 11, 00:15 UTCJul 11, 03:10 UTC2h 55m
2026-07-10 FFT3108 LAS → STL Jul 10, 20:15 UTCJul 10, 22:55 UTC2h 40m
2026-07-10 FFT4277 IAD → LAS Jul 10, 14:10 UTCJul 10, 18:40 UTC4h 30m
2026-07-10 FFT4278 LAS → IAD Jul 10, 08:10 UTCJul 10, 12:25 UTC4h 15m
2026-07-10 FFT1821 - Jul 10, 01:50 UTCJul 10, 05:55 UTC4h 5m
2026-07-09 FFT1492 - Jul 9, 22:00 UTCJul 10, 00:15 UTC2h 15m
2026-07-09 FFT2919 CLE → TPA Jul 9, 18:05 UTCJul 9, 20:05 UTC2h 0m
2026-07-09 FFT2684 - Jul 9, 14:15 UTCJul 9, 16:25 UTC2h 10m
2026-07-09 FFT3679 - Jul 9, 10:35 UTCJul 9, 12:40 UTC2h 5m
2026-07-09 FFT4036 ATL → CLE Jul 9, 00:10 UTCJul 9, 01:25 UTC1h 15m
2026-07-08 FFT152 CUN → ATL Jul 8, 20:10 UTCJul 8, 22:10 UTC2h 0m
2026-07-08 FFT153 ATL → CUN Jul 8, 16:20 UTCJul 8, 18:30 UTC2h 10m
2026-07-08 FFT4707 IAD → ATL Jul 8, 11:55 UTCJul 8, 13:15 UTC1h 20m
2026-07-08 FFT4707 IAD → ATL Jul 8, 12:02 UTCJul 8, 13:11 UTC1h 9m
2026-07-08 FFT3692 ATL → IAD Jul 8, 01:30 UTCJul 8, 02:50 UTC1h 20m
2026-07-08 FFT3692 ATL → IAD Jul 8, 01:19 UTCJul 8, 02:46 UTC1h 27m
2026-07-07 FFT24 - Jul 7, 21:50 UTCJul 7, 23:25 UTC1h 35m
2026-07-07 FFT25 ATL → PUJ Jul 7, 15:31 UTCJul 7, 18:28 UTC2h 57m
2026-07-07 FFT25 - Jul 7, 15:25 UTCJul 7, 16:50 UTC1h 25m
2026-07-07 FFT3287 LGA → ATL Jul 7, 11:50 UTCJul 7, 13:30 UTC1h 40m
2026-07-07 FFT3288 ATL → LGA Jul 7, 01:10 UTCJul 7, 02:50 UTC1h 40m
2026-07-06 FFT152 CUN → ATL Jul 6, 20:20 UTCJul 6, 22:20 UTC2h 0m
2026-07-06 FFT153 - Jul 6, 16:15 UTCJul 6, 18:20 UTC2h 5m
2026-07-06 FFT4427 - Jul 6, 12:55 UTCJul 6, 14:15 UTC1h 20m
2026-07-06 FFT2510 ATL → BWI Jul 6, 09:45 UTCJul 6, 11:10 UTC1h 25m
2026-07-06 FFT2400 - Jul 6, 02:00 UTCJul 6, 03:45 UTC1h 45m
2026-07-06 FFT2400 IAH → ATL Jul 6, 01:24 UTCJul 6, 03:49 UTC2h 25m
2026-07-05 FFT3067 - Jul 5, 21:20 UTCJul 6, 00:05 UTC2h 45m

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 N649FR page for operator, model, and routing details .

Mode-S A88737 frequently asked

What is Mode-S code A88737?
A88737 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N649FR.
Where is Mode-S A88737 registered?
Mode-S code A88737 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 A88737 broadcasting right now?
Mode-S A88737 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 A88737, octal 52103467, decimal 11,044,663.
What flights does A88737 operate?
Mode-S A88737 has broadcast 20 distinct callsigns, including FFT87, FFT44, FFT2636, FFT2635, FFT86.