Apparatus

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sensors Mode-S transponder

ACF5F4

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N934QS · CESSNA 680 Citation Latitude · operated by BAIHP HOLDINGS LLC, CLINE ALEX TANNER, PERRETTE AMY, PERRETTE JEAN-BRIAC, CAMSAL LLC, CASE PARTNER HOLDINGS LLC

Hex
ACF5F4
Octal
53172764
Decimal
11,335,156
Country
US
Tail
N934QS
Type
C68A
No current signal · last broadcast 5h ago
Flights observed
116
Distinct callsigns
2
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S ACF5F4.

Country allocation

The ICAO 24-bit address ACF5F4 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
EJA934 NetJets 110 2026-05-29
N934QS - 6 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EJA934 IND → DEC May 29, 22:45 UTCMay 30, 00:20 UTC1h 35m
2026-05-29 EJA934 IND → DEC May 29, 19:15 UTCMay 29, 20:25 UTC1h 10m
2026-05-29 EJA934 IND → DEC May 29, 16:10 UTCMay 29, 16:50 UTC40m
2026-05-29 EJA934 IND → DEC May 29, 13:55 UTCMay 29, 14:55 UTC1h 0m
2026-05-28 EJA934 IND → DEC May 28, 19:45 UTCMay 28, 21:30 UTC1h 45m
2026-05-28 N934QS - May 28, 15:00 UTCMay 28, 17:25 UTC2h 25m
2026-05-27 N934QS - May 27, 19:30 UTCMay 27, 22:10 UTC2h 40m
2026-05-27 EJA934 IND → DEC May 27, 17:20 UTCMay 27, 18:35 UTC1h 15m
2026-05-27 EJA934 IND → DEC May 27, 13:30 UTCMay 27, 14:40 UTC1h 10m
2026-05-27 EJA934 IND → DEC May 27, 11:20 UTCMay 27, 11:55 UTC35m
2026-05-26 EJA934 IND → DEC May 26, 18:59 UTCMay 26, 20:45 UTC1h 45m
2026-05-26 EJA934 IND → DEC May 26, 16:30 UTCMay 26, 17:50 UTC1h 20m
2026-05-26 EJA934 IND → DEC May 26, 15:09 UTCMay 26, 15:54 UTC45m
2026-05-26 EJA934 IND → DEC May 26, 12:20 UTCMay 26, 14:09 UTC1h 50m
2026-05-25 EJA934 IND → DEC May 25, 18:50 UTCMay 25, 19:20 UTC30m
2026-05-25 EJA934 IND → DEC May 25, 15:50 UTCMay 25, 16:50 UTC1h 0m
2026-05-25 EJA934 IND → DEC May 25, 14:05 UTCMay 25, 15:00 UTC55m
2026-05-25 EJA934 IND → DEC May 25, 10:15 UTCMay 25, 12:40 UTC2h 25m
2026-05-22 EJA934 IND → DEC May 22, 23:15 UTCMay 23, 01:40 UTC2h 25m
2026-05-18 EJA934 IND → DEC May 18, 13:00 UTCMay 18, 14:20 UTC1h 20m
2026-05-18 EJA934 IND → DEC May 18, 01:00 UTCMay 18, 01:50 UTC50m
2026-05-17 EJA934 IND → DEC May 17, 16:05 UTCMay 17, 19:15 UTC3h 10m
2026-05-16 EJA934 IND → DEC May 16, 18:15 UTCMay 16, 18:30 UTC15m
2026-05-15 EJA934 IND → DEC May 15, 17:45 UTCMay 15, 19:35 UTC1h 50m
2026-05-15 EJA934 IND → DEC May 15, 14:15 UTCMay 15, 15:35 UTC1h 19m
2026-05-14 EJA934 IND → DEC May 14, 21:40 UTCMay 14, 22:35 UTC55m
2026-05-14 EJA934 IND → DEC May 14, 19:00 UTCMay 14, 20:10 UTC1h 10m
2026-05-14 EJA934 IND → DEC May 14, 17:10 UTCMay 14, 17:45 UTC35m
2026-05-13 EJA934 IND → DEC May 13, 19:05 UTCMay 13, 20:25 UTC1h 20m
2026-05-13 EJA934 IND → DEC May 13, 17:10 UTCMay 13, 17:45 UTC35m
2026-05-13 EJA934 IND → DEC May 13, 15:10 UTCMay 13, 16:20 UTC1h 10m
2026-05-11 N934QS - May 11, 18:50 UTCMay 11, 20:20 UTC1h 30m
2026-05-11 N934QS - May 11, 13:30 UTCMay 11, 16:35 UTC3h 5m
2026-05-10 EJA934 IND → DEC May 10, 18:09 UTCMay 10, 21:19 UTC3h 10m
2026-05-10 EJA934 IND → DEC May 10, 15:45 UTCMay 10, 16:20 UTC35m
2026-05-10 EJA934 IND → DEC May 10, 11:10 UTCMay 10, 14:09 UTC3h 0m
2026-05-09 EJA934 IND → DEC May 9, 17:55 UTCMay 9, 19:35 UTC1h 40m
2026-05-09 EJA934 IND → DEC May 9, 15:45 UTCMay 9, 16:40 UTC55m
2026-05-08 EJA934 IND → DEC May 8, 20:10 UTCMay 8, 22:15 UTC2h 5m
2026-05-08 EJA934 IND → DEC May 8, 18:55 UTCMay 8, 19:10 UTC15m
2026-05-08 EJA934 IND → DEC May 8, 15:15 UTCMay 8, 17:50 UTC2h 35m
2026-05-08 EJA934 IND → DEC May 8, 13:25 UTCMay 8, 13:50 UTC25m
2026-05-06 EJA934 IND → DEC May 6, 21:25 UTCMay 6, 21:55 UTC30m
2026-05-06 N934QS - May 6, 19:15 UTCMay 6, 20:15 UTC1h 0m
2026-05-04 N934QS - May 4, 20:20 UTCMay 4, 21:05 UTC45m
2026-05-04 EJA934 IND → DEC May 4, 02:30 UTCMay 4, 03:40 UTC1h 10m
2026-05-03 EJA934 IND → DEC May 3, 23:30 UTCMay 4, 01:44 UTC2h 15m
2026-05-03 EJA934 IND → DEC May 3, 18:50 UTCMay 3, 19:00 UTC10m
2026-05-03 EJA934 IND → DEC May 3, 13:20 UTCMay 3, 16:45 UTC3h 25m
2026-05-03 EJA934 IND → DEC May 3, 11:15 UTCMay 3, 12:00 UTC45m

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 N934QS page for operator, model, and routing details .

Mode-S ACF5F4 frequently asked

What is Mode-S code ACF5F4?
ACF5F4 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N934QS.
Where is Mode-S ACF5F4 registered?
Mode-S code ACF5F4 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 ACF5F4 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACF5F4, octal 53172764, decimal 11,335,156.
What flights does ACF5F4 operate?
Mode-S ACF5F4 has broadcast 2 distinct callsigns, including EJA934, N934QS.