Apparatus

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sensors Mode-S transponder

ACEACF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N931QS · CESSNA 680 Citation Latitude · operated by GIFFIN AERO LLC, COLLINS ANDREW J JR, COLLINS LILA SOMERS, DYNAMIC DEVELOPMENT INC, REILLY EUGENE, MITZ KATHLEEN

Hex
ACEACF
Octal
53165317
Decimal
11,332,303
Country
US
Tail
N931QS
Type
C68A
No current signal · last broadcast 12h ago
Flights observed
122
Distinct callsigns
2
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S ACEACF.

Country allocation

The ICAO 24-bit address ACEACF 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 2 distinct

Callsign Airline Flights Last seen
EJA931 NetJets 114 2026-05-29
N931QS - 8 2026-04-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA931 PHL → PBI May 29, 17:15 UTCMay 29, 18:00 UTC45m
2026-05-29 EJA931 PHL → PBI May 29, 14:15 UTCMay 29, 15:45 UTC1h 30m
2026-05-28 EJA931 PHL → PBI May 28, 21:25 UTCMay 28, 23:35 UTC2h 10m
2026-05-28 EJA931 PHL → PBI May 28, 19:45 UTCMay 28, 20:10 UTC25m
2026-05-28 EJA931 PHL → PBI May 28, 16:40 UTCMay 28, 17:05 UTC25m
2026-05-28 EJA931 PHL → PBI May 28, 13:40 UTCMay 28, 15:20 UTC1h 40m
2026-05-26 EJA931 PHL → PBI May 26, 20:24 UTCMay 26, 21:00 UTC35m
2026-05-26 EJA931 PHL → PBI May 26, 16:59 UTCMay 26, 19:20 UTC2h 20m
2026-05-26 EJA931 PHL → PBI May 26, 14:05 UTCMay 26, 14:50 UTC45m
2026-05-25 EJA931 PHL → PBI May 25, 12:15 UTCMay 25, 12:30 UTC15m
2026-05-18 EJA931 PHL → PBI May 18, 14:30 UTCMay 18, 15:15 UTC45m
2026-05-18 EJA931 PHL → PBI May 18, 13:10 UTCMay 18, 13:30 UTC20m
2026-05-18 EJA931 PHL → PBI May 18, 01:10 UTCMay 18, 01:40 UTC30m
2026-05-17 EJA931 PHL → PBI May 17, 20:05 UTCMay 17, 20:45 UTC40m
2026-05-17 EJA931 PHL → PBI May 17, 18:15 UTCMay 17, 18:45 UTC30m
2026-05-17 EJA931 PHL → PBI May 17, 16:50 UTCMay 17, 17:20 UTC30m
2026-05-17 EJA931 PHL → PBI May 17, 14:50 UTCMay 17, 15:45 UTC55m
2026-05-16 EJA931 PHL → PBI May 16, 21:20 UTCMay 16, 22:05 UTC45m
2026-05-16 EJA931 PHL → PBI May 16, 18:10 UTCMay 16, 18:20 UTC10m
2026-05-16 EJA931 PHL → PBI May 16, 14:20 UTCMay 16, 15:35 UTC1h 15m
2026-05-15 EJA931 PHL → PBI May 15, 21:05 UTCMay 15, 21:50 UTC45m
2026-05-15 EJA931 PHL → PBI May 15, 19:10 UTCMay 15, 19:50 UTC40m
2026-05-15 EJA931 PHL → PBI May 15, 13:25 UTCMay 15, 16:45 UTC3h 19m
2026-05-14 EJA931 PHL → PBI May 14, 20:45 UTCMay 15, 00:00 UTC3h 15m
2026-05-14 EJA931 PHL → PBI May 14, 16:00 UTCMay 14, 18:10 UTC2h 10m
2026-05-14 EJA931 PHL → PBI May 14, 00:10 UTCMay 14, 01:25 UTC1h 15m
2026-05-13 EJA931 PHL → PBI May 13, 21:55 UTCMay 13, 22:35 UTC40m
2026-05-13 EJA931 PHL → PBI May 13, 17:10 UTCMay 13, 20:20 UTC3h 10m
2026-05-13 EJA931 PHL → PBI May 13, 00:25 UTCMay 13, 02:25 UTC2h 0m
2026-05-12 EJA931 PHL → PBI May 12, 21:10 UTCMay 12, 22:45 UTC1h 35m
2026-05-12 EJA931 PHL → PBI May 12, 17:15 UTCMay 12, 17:25 UTC10m
2026-05-12 EJA931 PHL → PBI May 12, 14:50 UTCMay 12, 16:35 UTC1h 45m
2026-05-12 EJA931 PHL → PBI May 12, 12:40 UTCMay 12, 13:40 UTC1h 0m
2026-05-12 EJA931 PHL → PBI May 12, 10:50 UTCMay 12, 11:50 UTC1h 0m
2026-05-11 EJA931 PHL → PBI May 11, 18:40 UTCMay 11, 20:15 UTC1h 35m
2026-05-11 EJA931 PHL → PBI May 11, 16:20 UTCMay 11, 17:20 UTC1h 1m
2026-05-11 EJA931 PHL → PBI May 11, 13:55 UTCMay 11, 14:30 UTC35m
2026-05-11 EJA931 PHL → PBI May 11, 12:20 UTCMay 11, 13:05 UTC45m
2026-05-11 EJA931 PHL → PBI May 11, 01:00 UTCMay 11, 01:55 UTC55m
2026-05-10 EJA931 PHL → PBI May 10, 21:04 UTCMay 11, 00:19 UTC3h 15m
2026-05-10 EJA931 PHL → PBI May 10, 18:25 UTCMay 10, 20:09 UTC1h 45m
2026-05-10 EJA931 PHL → PBI May 10, 16:44 UTCMay 10, 17:10 UTC25m
2026-05-10 EJA931 PHL → PBI May 10, 00:09 UTCMay 10, 00:34 UTC25m
2026-05-09 EJA931 PHL → PBI May 9, 22:34 UTCMay 9, 23:30 UTC55m
2026-05-09 EJA931 PHL → PBI May 9, 19:19 UTCMay 9, 20:10 UTC50m
2026-05-09 EJA931 PHL → PBI May 9, 17:05 UTCMay 9, 18:05 UTC1h 0m
2026-05-09 EJA931 PHL → PBI May 9, 15:15 UTCMay 9, 15:30 UTC15m
2026-05-08 EJA931 PHL → PBI May 8, 21:35 UTCMay 8, 23:20 UTC1h 45m
2026-05-08 EJA931 PHL → PBI May 8, 19:30 UTCMay 8, 19:45 UTC15m
2026-05-08 EJA931 PHL → PBI May 8, 14:55 UTCMay 8, 18:50 UTC3h 55m

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 N931QS page for operator, model, and routing details .

Mode-S ACEACF frequently asked

What is Mode-S code ACEACF?
ACEACF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N931QS.
Where is Mode-S ACEACF registered?
Mode-S code ACEACF 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 ACEACF broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACEACF, octal 53165317, decimal 11,332,303.
What flights does ACEACF operate?
Mode-S ACEACF has broadcast 2 distinct callsigns, including EJA931, N931QS.