Apparatus

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sensors Mode-S transponder

A8584C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N637FT · PIPER PA-28-140/150/160/180 · operated by FLORIDA INSTITUTE OF TECHNOLOGY

Hex
A8584C
Octal
52054114
Decimal
11,032,652
Country
US
Tail
N637FT
Type
P28A
No current signal · last broadcast 15h ago
Flights observed
196
Distinct callsigns
1
Country
US
Last broadcast
15h ago

Last known position

Most recent position reported by Mode-S A8584C.

Country allocation

The ICAO 24-bit address A8584C 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 1 distinct

Callsign Airline Flights Last seen
TCF637 - 196 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 TCF637 - Jul 17, 15:15 UTCJul 17, 17:05 UTC1h 50m
2026-07-17 TCF637 - Jul 17, 12:19 UTCJul 17, 13:05 UTC45m
2026-07-16 TCF637 - Jul 16, 13:40 UTCJul 16, 15:10 UTC1h 30m
2026-07-15 TCF637 MLB → MLB Jul 15, 18:05 UTCJul 15, 19:10 UTC1h 5m
2026-07-15 TCF637 - Jul 15, 15:20 UTCJul 15, 16:45 UTC1h 25m
2026-07-15 TCF637 - Jul 15, 12:50 UTCJul 15, 13:35 UTC45m
2026-07-15 TCF637 - Jul 15, 11:00 UTCJul 15, 11:50 UTC50m
2026-07-14 TCF637 - Jul 14, 15:25 UTCJul 14, 16:50 UTC1h 25m
2026-07-14 TCF637 - Jul 14, 11:10 UTCJul 14, 12:35 UTC1h 25m
2026-07-11 TCF637 - Jul 11, 13:35 UTCJul 11, 15:25 UTC1h 50m
2026-07-11 TCF637 - Jul 11, 11:15 UTCJul 11, 12:45 UTC1h 30m
2026-07-10 TCF637 - Jul 10, 14:55 UTCJul 10, 16:05 UTC1h 10m
2026-07-10 TCF637 - Jul 10, 12:10 UTCJul 10, 13:10 UTC1h 0m
2026-07-10 TCF637 - Jul 10, 01:45 UTCJul 10, 03:05 UTC1h 20m
2026-07-09 TCF637 MLB → MLB Jul 9, 21:20 UTCJul 9, 22:55 UTC1h 35m
2026-07-08 TCF637 - Jul 8, 15:50 UTCJul 8, 17:00 UTC1h 10m
2026-07-08 TCF637 - Jul 8, 13:05 UTCJul 8, 14:45 UTC1h 40m
2026-07-08 TCF637 - Jul 8, 01:35 UTCJul 8, 03:30 UTC1h 55m
2026-07-06 TCF637 - Jul 6, 17:00 UTCJul 6, 17:30 UTC30m
2026-07-06 TCF637 - Jul 6, 15:00 UTCJul 6, 15:30 UTC30m
2026-07-06 TCF637 - Jul 6, 11:50 UTCJul 6, 12:50 UTC1h 0m
2026-07-03 TCF637 - Jul 3, 15:25 UTCJul 3, 16:40 UTC1h 15m
2026-07-03 TCF637 - Jul 3, 12:45 UTCJul 3, 14:05 UTC1h 20m
2026-07-02 TCF637 - Jul 2, 18:55 UTCJul 2, 19:45 UTC50m
2026-06-30 TCF637 - Jun 30, 13:35 UTCJun 30, 14:45 UTC1h 10m
2026-06-30 TCF637 - Jun 30, 11:00 UTCJun 30, 12:35 UTC1h 35m
2026-06-29 TCF637 MLB → MLB Jun 29, 16:19 UTCJun 29, 18:05 UTC1h 45m
2026-06-29 TCF637 - Jun 29, 13:49 UTCJun 29, 15:00 UTC1h 10m
2026-06-29 TCF637 MLB → MLB Jun 29, 10:59 UTCJun 29, 12:09 UTC1h 10m
2026-06-28 TCF637 - Jun 28, 13:10 UTCJun 28, 15:05 UTC1h 55m
2026-06-27 TCF637 - Jun 27, 14:14 UTCJun 27, 14:35 UTC20m
2026-06-27 TCF637 - Jun 27, 12:19 UTCJun 27, 13:04 UTC45m
2026-06-27 TCF637 MLB → MLB Jun 27, 01:04 UTCJun 27, 02:59 UTC1h 55m
2026-06-23 TCF637 - Jun 23, 15:30 UTCJun 23, 16:39 UTC1h 10m
2026-06-23 TCF637 - Jun 23, 13:15 UTCJun 23, 13:59 UTC45m
2026-06-23 TCF637 - Jun 23, 10:39 UTCJun 23, 12:20 UTC1h 40m
2026-06-22 TCF637 - Jun 22, 23:24 UTCJun 23, 00:04 UTC40m
2026-06-22 TCF637 - Jun 22, 20:44 UTCJun 22, 21:25 UTC40m
2026-06-19 TCF637 - Jun 19, 13:20 UTCJun 19, 13:50 UTC30m
2026-06-18 TCF637 - Jun 18, 22:35 UTCJun 19, 00:10 UTC1h 34m
2026-06-18 TCF637 - Jun 18, 17:25 UTCJun 18, 18:35 UTC1h 10m
2026-06-18 TCF637 - Jun 18, 14:15 UTCJun 18, 15:10 UTC55m
2026-06-18 TCF637 - Jun 18, 11:50 UTCJun 18, 13:10 UTC1h 20m
2026-06-17 TCF637 - Jun 17, 18:50 UTCJun 17, 20:05 UTC1h 15m
2026-06-17 TCF637 MLB → MLB Jun 17, 16:10 UTCJun 17, 17:40 UTC1h 30m
2026-06-17 TCF637 - Jun 17, 13:20 UTCJun 17, 14:10 UTC50m
2026-06-17 TCF637 - Jun 17, 10:40 UTCJun 17, 11:45 UTC1h 5m
2026-06-16 TCF637 - Jun 16, 14:50 UTCJun 16, 15:55 UTC1h 5m
2026-06-16 TCF637 - Jun 16, 11:25 UTCJun 16, 13:09 UTC1h 45m
2026-06-15 TCF637 - Jun 15, 20:30 UTCJun 15, 21:20 UTC50m

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 N637FT page for operator, model, and routing details .

Mode-S A8584C frequently asked

What is Mode-S code A8584C?
A8584C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N637FT.
Where is Mode-S A8584C registered?
Mode-S code A8584C 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 A8584C broadcasting right now?
No active broadcast right now. Last signal was 15h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8584C, octal 52054114, decimal 11,032,652.
What flights does A8584C operate?
Mode-S A8584C has broadcast 1 distinct callsign, including TCF637.