Apparatus

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sensors Mode-S transponder

AC7AE4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N903FX · ATR-42-300 · operated by FEDERAL EXPRESS CORP

Hex
AC7AE4
Octal
53075344
Decimal
11,303,652
Country
US
Tail
N903FX
Type
AT43
No current signal · last broadcast 12d ago
Flights observed
53
Distinct callsigns
3
Country
US
Last broadcast
12d ago

Last known position

Most recent position reported by Mode-S AC7AE4.

Country allocation

The ICAO 24-bit address AC7AE4 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 3 distinct

Callsign Airline Flights Last seen
CFS8584 Empire Airlines 27 2026-05-16
CFS7584 Empire Airlines 25 2026-05-16
CFS8739 Empire Airlines 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-21 CFS8739 GTF → BIL May 21, 14:25 UTCMay 21, 14:35 UTC10m
2026-05-16 CFS8584 FSD → RAP May 16, 13:31 UTCMay 16, 14:25 UTC55m
2026-05-16 CFS7584 RAP → FSD May 16, 00:40 UTCMay 16, 01:30 UTC50m
2026-05-14 CFS8584 FSD → RAP May 14, 12:20 UTCMay 14, 13:25 UTC1h 5m
2026-05-14 CFS7584 RAP → FSD May 14, 00:30 UTCMay 14, 01:20 UTC50m
2026-05-13 CFS8584 FSD → RAP May 13, 12:15 UTCMay 13, 13:15 UTC1h 0m
2026-05-13 CFS7584 RAP → FSD May 13, 00:40 UTCMay 13, 01:30 UTC50m
2026-05-12 CFS8584 FSD → RAP May 12, 12:40 UTCMay 12, 13:45 UTC1h 5m
2026-05-09 CFS8584 FSD → RAP May 9, 12:35 UTCMay 9, 13:35 UTC1h 0m
2026-05-09 CFS7584 RAP → FSD May 9, 00:45 UTCMay 9, 01:35 UTC50m
2026-05-08 CFS8584 FSD → RAP May 8, 12:44 UTCMay 8, 13:45 UTC1h 0m
2026-05-08 CFS7584 RAP → FSD May 8, 00:34 UTCMay 8, 01:24 UTC50m
2026-05-07 CFS8584 FSD → RAP May 7, 12:40 UTCMay 7, 13:40 UTC1h 0m
2026-05-07 CFS7584 RAP → FSD May 7, 00:40 UTCMay 7, 01:35 UTC55m
2026-05-06 CFS8584 FSD → RAP May 6, 16:00 UTCMay 6, 17:00 UTC1h 0m
2026-05-06 CFS7584 RAP → FSD May 6, 00:35 UTCMay 6, 01:30 UTC55m
2026-05-05 CFS8584 FSD → RAP May 5, 13:10 UTCMay 5, 14:20 UTC1h 10m
2026-05-05 CFS7584 RAP → FSD May 5, 00:45 UTCMay 5, 01:30 UTC45m
2026-05-02 CFS8584 FSD → RAP May 2, 12:45 UTCMay 2, 13:45 UTC1h 0m
2026-05-02 CFS7584 RAP → FSD May 2, 00:30 UTCMay 2, 01:25 UTC55m
2026-05-01 CFS8584 FSD → RAP May 1, 12:20 UTCMay 1, 13:25 UTC1h 5m
2026-05-01 CFS7584 RAP → FSD May 1, 00:35 UTCMay 1, 01:25 UTC50m
2026-04-30 CFS8584 FSD → RAP Apr 30, 12:50 UTCApr 30, 13:55 UTC1h 5m
2026-04-30 CFS7584 RAP → FSD Apr 30, 00:35 UTCApr 30, 01:30 UTC55m
2026-04-29 CFS8584 FSD → RAP Apr 29, 13:40 UTCApr 29, 14:35 UTC55m
2026-04-29 CFS7584 RAP → FSD Apr 29, 00:30 UTCApr 29, 01:20 UTC50m
2026-04-28 CFS8584 FSD → RAP Apr 28, 14:55 UTCApr 28, 16:00 UTC1h 5m
2026-04-28 CFS7584 RAP → FSD Apr 28, 00:50 UTCApr 28, 01:50 UTC1h 0m
2026-04-25 CFS8584 FSD → RAP Apr 25, 12:00 UTCApr 25, 13:05 UTC1h 5m
2026-04-25 CFS7584 RAP → FSD Apr 25, 00:55 UTCApr 25, 01:45 UTC50m
2026-04-24 CFS8584 FSD → RAP Apr 24, 12:15 UTCApr 24, 13:20 UTC1h 5m
2026-04-24 CFS7584 RAP → FSD Apr 24, 00:30 UTCApr 24, 01:25 UTC55m
2026-04-23 CFS8584 FSD → RAP Apr 23, 12:10 UTCApr 23, 13:15 UTC1h 5m
2026-04-23 CFS7584 RAP → FSD Apr 23, 00:40 UTCApr 23, 01:35 UTC55m
2026-04-22 CFS8584 FSD → RAP Apr 22, 12:10 UTCApr 22, 13:15 UTC1h 5m
2026-04-22 CFS7584 RAP → FSD Apr 22, 00:55 UTCApr 22, 01:45 UTC50m
2026-04-21 CFS8584 FSD → RAP Apr 21, 12:35 UTCApr 21, 13:40 UTC1h 5m
2026-04-21 CFS7584 RAP → FSD Apr 21, 00:40 UTCApr 21, 01:30 UTC50m
2026-04-18 CFS8584 FSD → RAP Apr 18, 12:15 UTCApr 18, 13:20 UTC1h 5m
2026-04-18 CFS7584 RAP → FSD Apr 18, 01:25 UTCApr 18, 01:30 UTC5m
2026-04-18 CFS7584 RAP → FSD Apr 18, 00:35 UTCApr 18, 01:20 UTC45m
2026-04-17 CFS8584 FSD → RAP Apr 17, 12:10 UTCApr 17, 13:10 UTC1h 0m
2026-04-17 CFS7584 RAP → FSD Apr 17, 00:30 UTCApr 17, 01:15 UTC45m
2026-04-16 CFS8584 FSD → RAP Apr 16, 13:15 UTCApr 16, 13:30 UTC15m
2026-04-16 CFS8584 FSD → RAP Apr 16, 12:29 UTCApr 16, 13:05 UTC35m
2026-04-16 CFS7584 RAP → FSD Apr 16, 01:10 UTCApr 16, 01:20 UTC10m
2026-04-16 CFS7584 RAP → FSD Apr 16, 00:25 UTCApr 16, 01:05 UTC40m
2026-04-15 CFS8584 FSD → RAP Apr 15, 13:01 UTCApr 15, 13:30 UTC30m
2026-04-15 CFS8584 FSD → RAP Apr 15, 12:30 UTCApr 15, 12:55 UTC25m
2026-04-15 CFS7584 RAP → FSD Apr 15, 00:55 UTCApr 15, 01:15 UTC20m

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 N903FX page for operator, model, and routing details .

Mode-S AC7AE4 frequently asked

What is Mode-S code AC7AE4?
AC7AE4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N903FX.
Where is Mode-S AC7AE4 registered?
Mode-S code AC7AE4 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 AC7AE4 broadcasting right now?
No active broadcast right now. Last signal was 12d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AC7AE4, octal 53075344, decimal 11,303,652.
What flights does AC7AE4 operate?
Mode-S AC7AE4 has broadcast 3 distinct callsigns, including CFS8584, CFS7584, CFS8739.