Apparatus

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sensors Mode-S transponder

A6844D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N519QS · CESSNA 680 Citation Latitude · operated by NETJETS SALES INC, AIR BEUTEUS LLC, ARCADIA HOLDINGS LLC, CAMBRIDGE INFORMATION GROUP INC, CANTON TRANSPORTATION LLC, DCO AVIATION LLC

Hex
A6844D
Octal
51502115
Decimal
10,912,845
Country
US
Tail
N519QS
Type
C68A
No current signal · last broadcast 6h ago
Flights observed
132
Distinct callsigns
2
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A6844D.

Country allocation

The ICAO 24-bit address A6844D 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
EJA519 NetJets 125 2026-06-05
N519QS - 7 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-05 EJA519 STS → IAD Jun 5, 17:25 UTCJun 5, 21:30 UTC4h 5m
2026-06-05 EJA519 STS → IAD Jun 5, 13:30 UTCJun 5, 16:20 UTC2h 50m
2026-06-04 EJA519 STS → IAD Jun 4, 19:30 UTCJun 4, 20:35 UTC1h 5m
2026-06-04 EJA519 STS → IAD Jun 4, 18:00 UTCJun 4, 18:35 UTC35m
2026-06-04 EJA519 STS → IAD Jun 4, 16:05 UTCJun 4, 16:40 UTC35m
2026-06-04 EJA519 STS → IAD Jun 4, 13:15 UTCJun 4, 14:55 UTC1h 40m
2026-06-04 EJA519 STS → IAD Jun 4, 11:10 UTCJun 4, 11:45 UTC35m
2026-06-03 EJA519 STS → IAD Jun 3, 14:10 UTCJun 3, 15:40 UTC1h 30m
2026-06-03 EJA519 STS → IAD Jun 3, 13:15 UTCJun 3, 13:25 UTC10m
2026-06-03 EJA519 STS → IAD Jun 3, 10:25 UTCJun 3, 12:00 UTC1h 35m
2026-06-02 EJA519 STS → IAD Jun 2, 19:55 UTCJun 2, 20:40 UTC45m
2026-06-02 N519QS - Jun 2, 13:05 UTCJun 2, 18:40 UTC5h 35m
2026-06-01 N519QS - Jun 1, 21:50 UTCJun 1, 23:05 UTC1h 15m
2026-06-01 EJA519 STS → IAD Jun 1, 18:30 UTCJun 1, 20:05 UTC1h 35m
2026-05-31 N519QS - May 31, 21:35 UTCJun 1, 00:00 UTC2h 25m
2026-05-31 N519QS - May 31, 18:30 UTCMay 31, 19:15 UTC45m
2026-05-31 EJA519 STS → IAD May 31, 16:05 UTCMay 31, 17:20 UTC1h 15m
2026-05-31 EJA519 STS → IAD May 31, 14:20 UTCMay 31, 15:20 UTC1h 0m
2026-05-31 EJA519 STS → IAD May 31, 00:40 UTCMay 31, 01:11 UTC31m
2026-05-30 EJA519 STS → IAD May 30, 21:45 UTCMay 30, 23:30 UTC1h 45m
2026-05-30 EJA519 STS → IAD May 30, 16:00 UTCMay 30, 16:35 UTC35m
2026-05-30 EJA519 STS → IAD May 30, 14:20 UTCMay 30, 15:10 UTC50m
2026-05-29 EJA519 STS → IAD May 29, 23:05 UTCMay 30, 00:00 UTC55m
2026-05-29 EJA519 STS → IAD May 29, 20:55 UTCMay 29, 22:20 UTC1h 25m
2026-05-29 EJA519 STS → IAD May 29, 13:30 UTCMay 29, 16:40 UTC3h 10m
2026-05-28 EJA519 STS → IAD May 28, 22:25 UTCMay 28, 23:10 UTC45m
2026-05-28 EJA519 STS → IAD May 28, 20:20 UTCMay 28, 21:45 UTC1h 25m
2026-05-28 EJA519 STS → IAD May 28, 16:25 UTCMay 28, 18:20 UTC1h 55m
2026-05-28 EJA519 STS → IAD May 28, 12:55 UTCMay 28, 15:30 UTC2h 35m
2026-05-27 EJA519 STS → IAD May 27, 21:40 UTCMay 27, 22:05 UTC25m
2026-05-27 EJA519 STS → IAD May 27, 18:15 UTCMay 27, 20:45 UTC2h 30m
2026-05-27 EJA519 STS → IAD May 27, 16:40 UTCMay 27, 17:25 UTC45m
2026-05-26 EJA519 STS → IAD May 26, 17:30 UTCMay 26, 17:55 UTC25m
2026-05-25 EJA519 STS → IAD May 25, 17:05 UTCMay 25, 19:15 UTC2h 10m
2026-05-24 EJA519 STS → IAD May 24, 18:50 UTCMay 24, 20:20 UTC1h 30m
2026-05-24 EJA519 STS → IAD May 24, 17:00 UTCMay 24, 17:35 UTC35m
2026-05-23 EJA519 STS → IAD May 23, 22:55 UTCMay 24, 00:00 UTC1h 5m
2026-05-23 EJA519 STS → IAD May 23, 19:45 UTCMay 23, 21:35 UTC1h 50m
2026-05-23 EJA519 STS → IAD May 23, 14:55 UTCMay 23, 16:30 UTC1h 35m
2026-05-23 EJA519 STS → IAD May 23, 00:25 UTCMay 23, 01:00 UTC35m
2026-05-22 EJA519 STS → IAD May 22, 23:00 UTCMay 22, 23:30 UTC30m
2026-05-22 EJA519 STS → IAD May 22, 19:25 UTCMay 22, 21:00 UTC1h 35m
2026-05-22 EJA519 STS → IAD May 22, 16:25 UTCMay 22, 18:15 UTC1h 50m
2026-05-22 EJA519 STS → IAD May 22, 13:45 UTCMay 22, 14:40 UTC55m
2026-05-21 EJA519 STS → IAD May 21, 17:50 UTCMay 21, 19:45 UTC1h 55m
2026-05-20 EJA519 STS → IAD May 20, 21:05 UTCMay 21, 05:00 UTC7h 55m
2026-05-20 EJA519 STS → IAD May 20, 19:00 UTCMay 20, 20:10 UTC1h 10m
2026-05-20 EJA519 STS → IAD May 20, 16:45 UTCMay 20, 18:05 UTC1h 20m
2026-05-20 EJA519 STS → IAD May 20, 00:00 UTCMay 20, 00:35 UTC35m
2026-05-19 EJA519 STS → IAD May 19, 21:05 UTCMay 19, 21:50 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 N519QS page for operator, model, and routing details .

Mode-S A6844D frequently asked

What is Mode-S code A6844D?
A6844D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N519QS.
Where is Mode-S A6844D registered?
Mode-S code A6844D 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 A6844D broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6844D, octal 51502115, decimal 10,912,845.
What flights does A6844D operate?
Mode-S A6844D has broadcast 2 distinct callsigns, including EJA519, N519QS.