Apparatus

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sensors Mode-S transponder

A3B8AD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N339QS · CESSNA 680 Citation Sovereign · operated by NETJETS SALES INC

Hex
A3B8AD
Octal
50734255
Decimal
10,729,645
Country
US
Tail
N339QS
Type
C680
Broadcasting now · callsign EJA339 · 6,625 ft
Flights observed
163
Distinct callsigns
2
Country
US
Last broadcast
13d ago

Current position

A3B8AD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A3B8AD 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
EJA339 NetJets 161 2026-07-22
N339QS - 2 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 EJA339 OAK → SMO Jul 22, 15:55 UTCJul 22, 16:55 UTC1h 0m
2026-07-19 EJA339 OAK → SMO Jul 19, 20:35 UTCJul 19, 21:45 UTC1h 10m
2026-07-19 EJA339 OAK → SMO Jul 19, 18:10 UTCJul 19, 19:15 UTC1h 5m
2026-07-18 EJA339 OAK → SMO Jul 18, 22:10 UTCJul 18, 23:15 UTC1h 5m
2026-07-11 EJA339 - Jul 11, 00:05 UTCJul 11, 01:45 UTC1h 40m
2026-07-10 EJA339 - Jul 10, 17:40 UTCJul 10, 18:05 UTC25m
2026-07-10 EJA339 - Jul 10, 15:40 UTCJul 10, 16:30 UTC50m
2026-07-10 EJA339 - Jul 10, 14:05 UTCJul 10, 14:50 UTC45m
2026-07-10 EJA339 BOS → LGA Jul 10, 12:45 UTCJul 10, 13:30 UTC45m
2026-07-10 EJA339 - Jul 10, 10:45 UTCJul 10, 11:30 UTC45m
2026-07-08 EJA339 - Jul 8, 19:35 UTCJul 8, 20:30 UTC55m
2026-07-08 EJA339 - Jul 8, 17:15 UTCJul 8, 17:50 UTC35m
2026-07-08 EJA339 - Jul 8, 15:00 UTCJul 8, 15:50 UTC50m
2026-07-05 EJA339 - Jul 5, 19:05 UTCJul 5, 20:20 UTC1h 15m
2026-07-05 EJA339 - Jul 5, 16:55 UTCJul 5, 17:50 UTC55m
2026-07-04 EJA339 - Jul 4, 19:35 UTCJul 4, 20:20 UTC45m
2026-07-03 EJA339 - Jul 3, 14:15 UTCJul 3, 15:10 UTC55m
2026-07-02 EJA339 - Jul 2, 20:05 UTCJul 2, 20:55 UTC50m
2026-07-02 EJA339 - Jul 2, 16:25 UTCJul 2, 18:40 UTC2h 15m
2026-07-01 EJA339 - Jul 1, 23:50 UTCJul 2, 00:25 UTC35m
2026-07-01 EJA339 - Jul 1, 22:10 UTCJul 1, 22:25 UTC15m
2026-07-01 EJA339 - Jul 1, 19:35 UTCJul 1, 20:45 UTC1h 10m
2026-07-01 EJA339 - Jul 1, 15:25 UTCJul 1, 18:15 UTC2h 50m
2026-06-30 EJA339 - Jun 30, 22:50 UTCJul 1, 01:05 UTC2h 15m
2026-06-30 EJA339 - Jun 30, 20:25 UTCJun 30, 22:05 UTC1h 40m
2026-06-30 EJA339 LUK → TEB Jun 30, 15:05 UTCJun 30, 16:35 UTC1h 30m
2026-06-29 EJA339 OAK → SMO Jun 29, 19:00 UTCJun 29, 19:54 UTC55m
2026-06-29 EJA339 OAK → SMO Jun 29, 11:35 UTCJun 29, 13:54 UTC2h 20m
2026-06-28 EJA339 OAK → SMO Jun 28, 17:04 UTCJun 28, 18:29 UTC1h 25m
2026-06-28 EJA339 OAK → SMO Jun 28, 15:09 UTCJun 28, 15:44 UTC35m
2026-06-28 EJA339 OAK → SMO Jun 28, 11:55 UTCJun 28, 13:19 UTC1h 25m
2026-06-27 EJA339 OAK → SMO Jun 27, 14:54 UTCJun 27, 17:39 UTC2h 45m
2026-06-27 EJA339 OAK → SMO Jun 27, 12:50 UTCJun 27, 13:24 UTC35m
2026-06-26 EJA339 OAK → SMO Jun 26, 18:44 UTCJun 26, 20:00 UTC1h 15m
2026-06-26 EJA339 OAK → SMO Jun 26, 17:19 UTCJun 26, 18:04 UTC45m
2026-06-26 EJA339 OAK → SMO Jun 26, 15:15 UTCJun 26, 16:30 UTC1h 15m
2026-06-21 EJA339 OAK → SMO Jun 21, 17:54 UTCJun 21, 18:44 UTC50m
2026-06-21 EJA339 OAK → SMO Jun 21, 14:40 UTCJun 21, 15:40 UTC1h 0m
2026-06-21 EJA339 OAK → SMO Jun 21, 12:40 UTCJun 21, 13:20 UTC40m
2026-06-21 EJA339 OAK → SMO Jun 21, 11:05 UTCJun 21, 11:49 UTC45m
2026-06-20 EJA339 OAK → SMO Jun 20, 17:24 UTCJun 20, 18:10 UTC45m
2026-06-20 EJA339 OAK → SMO Jun 20, 16:05 UTCJun 20, 16:55 UTC50m
2026-06-20 EJA339 OAK → SMO Jun 20, 13:29 UTCJun 20, 14:24 UTC55m
2026-06-20 EJA339 OAK → SMO Jun 20, 10:44 UTCJun 20, 11:34 UTC50m
2026-06-19 EJA339 OAK → SMO Jun 19, 14:24 UTCJun 19, 16:55 UTC2h 30m
2026-06-17 EJA339 OAK → SMO Jun 17, 18:15 UTCJun 17, 20:55 UTC2h 40m
2026-06-17 EJA339 OAK → SMO Jun 17, 15:46 UTCJun 17, 16:25 UTC40m
2026-06-17 EJA339 OAK → SMO Jun 17, 13:50 UTCJun 17, 14:45 UTC55m
2026-06-17 EJA339 OAK → SMO Jun 17, 11:50 UTCJun 17, 13:10 UTC1h 20m
2026-06-16 EJA339 OAK → SMO Jun 16, 18:15 UTCJun 16, 19:40 UTC1h 25m

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 N339QS page for operator, model, and routing details .

Mode-S A3B8AD frequently asked

What is Mode-S code A3B8AD?
A3B8AD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N339QS.
Where is Mode-S A3B8AD registered?
Mode-S code A3B8AD 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 A3B8AD broadcasting right now?
Yes. Mode-S A3B8AD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3B8AD, octal 50734255, decimal 10,729,645.
What flights does A3B8AD operate?
Mode-S A3B8AD has broadcast 2 distinct callsigns, including EJA339, N339QS.