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sensors Mode-S transponder

ACBF99

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N920QS · CESSNA 680 Citation Latitude · operated by ANAHATA LLC, DAL PEZZO AVIATION LLC, NESS JOHN R, RAINEY JOHN JR, HIGDON JOSEPH, KBC AIRCRAFT LEASING LLC

Hex
ACBF99
Octal
53137631
Decimal
11,321,241
Country
US
Tail
N920QS
Type
C68A
Broadcasting now · callsign EJA920 · 3,925 ft
Flights observed
244
Distinct callsigns
2
Country
US
Last broadcast
Jul 24, 19:20 UTC

Current position

ACBF99 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address ACBF99 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
EJA920 NetJets 234 2026-07-24
N920QS - 10 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 EJA920 BCT → HPN Jul 24, 17:15 UTCJul 24, 19:20 UTC2h 5m
2026-07-24 EJA920 BCT → HPN Jul 24, 15:15 UTCJul 24, 15:55 UTC40m
2026-07-24 EJA920 BCT → HPN Jul 24, 13:20 UTCJul 24, 14:20 UTC1h 0m
2026-07-23 EJA920 BCT → HPN Jul 23, 21:35 UTCJul 23, 22:00 UTC25m
2026-07-23 EJA920 BCT → HPN Jul 23, 19:55 UTCJul 23, 20:40 UTC45m
2026-07-23 EJA920 BCT → HPN Jul 23, 17:20 UTCJul 23, 17:35 UTC15m
2026-07-23 EJA920 BCT → HPN Jul 23, 16:05 UTCJul 23, 16:35 UTC30m
2026-07-23 EJA920 BCT → HPN Jul 23, 14:20 UTCJul 23, 14:50 UTC30m
2026-07-23 EJA920 BCT → HPN Jul 23, 11:55 UTCJul 23, 12:35 UTC40m
2026-07-14 EJA920 - Jul 14, 21:55 UTCJul 14, 22:25 UTC30m
2026-07-14 EJA920 - Jul 14, 17:30 UTCJul 14, 18:00 UTC30m
2026-07-14 EJA920 - Jul 14, 15:15 UTCJul 14, 15:25 UTC10m
2026-07-14 EJA920 BOS → TTN Jul 14, 13:25 UTCJul 14, 14:15 UTC50m
2026-07-14 EJA920 SCH → BOS Jul 14, 00:55 UTCJul 14, 01:25 UTC30m
2026-07-13 EJA920 - Jul 13, 21:45 UTCJul 13, 23:55 UTC2h 10m
2026-07-13 EJA920 - Jul 13, 14:35 UTCJul 13, 16:40 UTC2h 5m
2026-07-12 EJA920 - Jul 12, 20:20 UTCJul 13, 16:40 UTC20h 20m
2026-07-12 EJA920 - Jul 12, 17:25 UTCJul 12, 18:40 UTC1h 15m
2026-07-11 EJA920 - Jul 11, 20:20 UTCJul 12, 18:40 UTC22h 20m
2026-07-11 EJA920 - Jul 11, 19:15 UTCJul 12, 18:15 UTC23h 0m
2026-07-11 EJA920 - Jul 11, 14:05 UTCJul 11, 17:20 UTC3h 15m
2026-07-10 EJA920 - Jul 10, 23:00 UTCJul 10, 23:15 UTC15m
2026-07-10 EJA920 - Jul 10, 21:40 UTCJul 10, 22:25 UTC45m
2026-07-10 EJA920 - Jul 10, 17:25 UTCJul 10, 17:40 UTC15m
2026-07-10 EJA920 - Jul 10, 12:15 UTCJul 10, 16:05 UTC3h 50m
2026-07-09 EJA920 - Jul 9, 21:25 UTCJul 9, 22:40 UTC1h 15m
2026-07-09 EJA920 - Jul 9, 19:30 UTCJul 9, 19:45 UTC15m
2026-07-08 EJA920 TEB → MSP Jul 8, 22:20 UTCJul 9, 00:50 UTC2h 30m
2026-07-08 EJA920 - Jul 8, 19:05 UTCJul 8, 19:40 UTC35m
2026-07-08 EJA920 - Jul 8, 15:10 UTCJul 8, 17:45 UTC2h 35m
2026-07-07 N920QS - Jul 7, 22:35 UTCJul 7, 23:00 UTC25m
2026-07-07 N920QS - Jul 7, 13:05 UTCJul 7, 13:50 UTC45m
2026-07-06 EJA920 BCT → HPN Jul 6, 20:35 UTCJul 6, 21:40 UTC1h 5m
2026-07-06 N920QS - Jul 6, 17:50 UTCJul 6, 19:25 UTC1h 35m
2026-07-06 N920QS - Jul 6, 13:35 UTCJul 6, 14:00 UTC25m
2026-07-06 EJA920 BCT → HPN Jul 6, 07:35 UTCJul 6, 08:55 UTC1h 20m
2026-07-06 EJA920 BCT → HPN Jul 6, 06:30 UTCJul 6, 06:40 UTC10m
2026-07-06 EJA920 BCT → HPN Jul 6, 04:10 UTCJul 6, 05:25 UTC1h 15m
2026-07-05 EJA920 BCT → HPN Jul 5, 23:10 UTCJul 6, 00:00 UTC50m
2026-07-05 EJA920 BCT → HPN Jul 5, 19:40 UTCJul 5, 21:40 UTC2h 0m
2026-07-05 EJA920 BCT → HPN Jul 5, 17:15 UTCJul 5, 18:00 UTC45m
2026-07-05 EJA920 BCT → HPN Jul 5, 15:10 UTCJul 5, 15:40 UTC30m
2026-07-03 EJA920 BCT → HPN Jul 3, 16:20 UTCJul 3, 17:45 UTC1h 25m
2026-07-02 EJA920 BCT → HPN Jul 2, 19:00 UTCJul 2, 19:50 UTC50m
2026-07-02 EJA920 BCT → HPN Jul 2, 17:10 UTCJul 2, 18:00 UTC50m
2026-07-02 EJA920 BCT → HPN Jul 2, 13:30 UTCJul 2, 14:00 UTC30m
2026-07-01 EJA920 BCT → HPN Jul 1, 22:30 UTCJul 1, 23:50 UTC1h 20m
2026-07-01 EJA920 BCT → HPN Jul 1, 20:45 UTCJul 1, 21:25 UTC40m
2026-07-01 EJA920 BCT → HPN Jul 1, 18:35 UTCJul 1, 19:10 UTC35m
2026-07-01 EJA920 BCT → HPN Jul 1, 16:30 UTCJul 1, 16:55 UTC25m

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 N920QS page for operator, model, and routing details .

Mode-S ACBF99 frequently asked

What is Mode-S code ACBF99?
ACBF99 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N920QS.
Where is Mode-S ACBF99 registered?
Mode-S code ACBF99 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 ACBF99 broadcasting right now?
Yes. Mode-S ACBF99 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACBF99, octal 53137631, decimal 11,321,241.
What flights does ACBF99 operate?
Mode-S ACBF99 has broadcast 2 distinct callsigns, including EJA920, N920QS.