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 Jul 24, 21:40 UTC
Flights observed
251
Distinct callsigns
2
Country
US
Last broadcast
Jul 24, 21:40 UTC

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 235 2026-07-24
N931QS - 16 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 EJA931 PHL → PBI Jul 24, 20:30 UTCJul 24, 21:40 UTC1h 10m
2026-07-24 EJA931 PHL → PBI Jul 24, 18:50 UTCJul 24, 19:20 UTC30m
2026-07-24 EJA931 PHL → PBI Jul 24, 15:30 UTCJul 24, 16:35 UTC1h 5m
2026-07-24 EJA931 PHL → PBI Jul 24, 13:20 UTCJul 24, 13:50 UTC30m
2026-07-23 EJA931 PHL → PBI Jul 23, 22:35 UTCJul 23, 22:50 UTC15m
2026-07-23 EJA931 PHL → PBI Jul 23, 20:55 UTCJul 23, 21:55 UTC1h 0m
2026-07-23 EJA931 PHL → PBI Jul 23, 18:00 UTCJul 23, 19:45 UTC1h 45m
2026-07-23 EJA931 PHL → PBI Jul 23, 14:30 UTCJul 23, 17:00 UTC2h 30m
2026-07-22 EJA931 PHL → PBI Jul 22, 14:10 UTCJul 22, 15:00 UTC50m
2026-07-21 EJA931 PHL → PBI Jul 21, 19:50 UTCJul 21, 22:15 UTC2h 25m
2026-07-21 EJA931 PHL → PBI Jul 21, 17:00 UTCJul 21, 18:45 UTC1h 45m
2026-07-21 EJA931 PHL → PBI Jul 21, 14:40 UTCJul 21, 15:55 UTC1h 15m
2026-07-21 EJA931 PHL → PBI Jul 21, 00:40 UTCJul 21, 02:15 UTC1h 35m
2026-07-20 EJA931 PHL → PBI Jul 20, 18:55 UTCJul 20, 19:05 UTC10m
2026-07-20 EJA931 PHL → PBI Jul 20, 16:35 UTCJul 20, 18:10 UTC1h 35m
2026-07-19 EJA931 PHL → PBI Jul 19, 18:20 UTCJul 19, 22:25 UTC4h 5m
2026-07-19 EJA931 PHL → PBI Jul 19, 15:20 UTCJul 19, 17:15 UTC1h 55m
2026-07-19 EJA931 PHL → PBI Jul 19, 12:05 UTCJul 19, 12:30 UTC25m
2026-07-18 EJA931 PHL → PBI Jul 18, 22:05 UTCJul 19, 01:00 UTC2h 55m
2026-07-18 EJA931 PHL → PBI Jul 18, 18:25 UTCJul 18, 21:20 UTC2h 55m
2026-07-18 EJA931 PHL → PBI Jul 18, 17:00 UTCJul 18, 17:25 UTC25m
2026-07-17 EJA931 PHL → PBI Jul 17, 23:30 UTCJul 18, 04:35 UTC5h 6m
2026-07-17 EJA931 PHL → PBI Jul 17, 20:55 UTCJul 17, 22:25 UTC1h 30m
2026-07-17 EJA931 PHL → PBI Jul 17, 18:19 UTCJul 17, 19:09 UTC50m
2026-07-17 EJA931 PHL → PBI Jul 17, 17:35 UTCJul 17, 17:40 UTC5m
2026-07-17 EJA931 PHL → PBI Jul 17, 14:04 UTCJul 17, 14:39 UTC35m
2026-07-16 EJA931 - Jul 16, 23:05 UTCJul 17, 00:45 UTC1h 40m
2026-07-16 EJA931 - Jul 16, 16:30 UTCJul 16, 20:55 UTC4h 25m
2026-07-15 EJA931 - Jul 15, 23:40 UTCJul 16, 00:35 UTC55m
2026-07-15 EJA931 - Jul 15, 17:55 UTCJul 15, 18:45 UTC50m
2026-07-15 EJA931 SAT → DAL Jul 15, 16:00 UTCJul 15, 17:05 UTC1h 5m
2026-07-15 EJA931 - Jul 15, 02:20 UTCJul 15, 03:05 UTC45m
2026-07-14 EJA931 SJC → DAL Jul 14, 20:50 UTCJul 15, 00:15 UTC3h 24m
2026-07-14 EJA931 BFI → SJC Jul 14, 16:50 UTCJul 14, 18:50 UTC2h 0m
2026-07-13 EJA931 - Jul 13, 14:15 UTCJul 13, 19:25 UTC5h 10m
2026-07-12 EJA931 - Jul 12, 22:25 UTCJul 12, 22:55 UTC30m
2026-07-12 N931QS - Jul 12, 13:45 UTCJul 12, 21:15 UTC7h 30m
2026-07-11 EJA931 - Jul 11, 18:50 UTCJul 11, 20:20 UTC1h 30m
2026-07-11 EJA931 - Jul 11, 17:30 UTCJul 11, 18:10 UTC40m
2026-07-11 EJA931 - Jul 11, 14:20 UTCJul 11, 15:25 UTC1h 5m
2026-07-11 EJA931 - Jul 11, 13:00 UTCJul 11, 13:35 UTC35m
2026-07-11 EJA931 - Jul 11, 11:30 UTCJul 11, 12:05 UTC35m
2026-07-10 EJA931 - Jul 10, 21:50 UTCJul 10, 22:35 UTC45m
2026-07-10 EJA931 - Jul 10, 19:40 UTCJul 10, 19:50 UTC10m
2026-07-10 EJA931 - Jul 10, 17:15 UTCJul 10, 18:00 UTC45m
2026-07-10 EJA931 HUA → CHA Jul 10, 15:15 UTCJul 10, 15:35 UTC20m
2026-07-10 EJA931 - Jul 10, 13:00 UTCJul 10, 14:15 UTC1h 15m
2026-07-10 N931QS - Jul 10, 02:45 UTCJul 10, 04:40 UTC1h 55m
2026-07-09 N931QS - Jul 9, 23:20 UTCJul 9, 23:55 UTC35m
2026-07-09 N931QS - Jul 9, 17:45 UTCJul 9, 18:20 UTC35m

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 Jul 24, 21:40 UTC.
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.