Apparatus

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sensors Mode-S transponder

A54245

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N438QS · EMBRAER EMB-505 Phenom 300 · operated by NETJETS SALES INC, COFFIN & SHAWVER LLC, TRUAX DOUGLAS, FRED B BARBARA INVESTMENTS LLC, LILLY GEORGE, CAREY JAMES D

Hex
A54245
Octal
51241105
Decimal
10,830,405
Country
US
Tail
N438QS
Type
E55P
No current signal · last broadcast 9h ago
Flights observed
179
Distinct callsigns
2
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S A54245.

Country allocation

The ICAO 24-bit address A54245 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
EJA438 NetJets 170 2026-07-13
N438QS - 9 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 EJA438 ROC → IAD Jul 13, 21:15 UTCJul 13, 21:55 UTC40m
2026-07-13 EJA438 ROC → IAD Jul 13, 19:15 UTCJul 13, 20:30 UTC1h 15m
2026-07-13 EJA438 ROC → IAD Jul 13, 16:20 UTCJul 13, 17:50 UTC1h 30m
2026-07-13 EJA438 ROC → IAD Jul 13, 14:50 UTCJul 13, 15:45 UTC55m
2026-07-13 EJA438 ROC → IAD Jul 13, 13:05 UTCJul 13, 13:25 UTC20m
2026-07-12 EJA438 ROC → IAD Jul 12, 21:55 UTCJul 12, 22:20 UTC25m
2026-07-12 EJA438 ROC → IAD Jul 12, 19:50 UTCJul 12, 19:55 UTC5m
2026-07-12 EJA438 ROC → IAD Jul 12, 18:15 UTCJul 12, 18:40 UTC25m
2026-07-12 EJA438 ROC → IAD Jul 12, 16:15 UTCJul 12, 16:40 UTC25m
2026-07-11 EJA438 ROC → IAD Jul 11, 15:40 UTCJul 11, 17:30 UTC1h 50m
2026-07-11 EJA438 ROC → IAD Jul 11, 13:35 UTCJul 11, 14:20 UTC45m
2026-07-10 EJA438 ROC → IAD Jul 10, 17:15 UTCJul 10, 17:50 UTC35m
2026-07-10 EJA438 ROC → IAD Jul 10, 14:25 UTCJul 10, 14:55 UTC30m
2026-06-09 EJA438 ROC → IAD Jun 9, 21:30 UTCJun 9, 23:05 UTC1h 35m
2026-06-09 EJA438 ROC → IAD Jun 9, 19:10 UTCJun 9, 20:10 UTC1h 0m
2026-06-09 EJA438 ROC → IAD Jun 9, 16:50 UTCJun 9, 18:20 UTC1h 30m
2026-06-09 EJA438 ROC → IAD Jun 9, 12:40 UTCJun 9, 14:40 UTC2h 0m
2026-06-08 EJA438 ROC → IAD Jun 8, 20:20 UTCJun 8, 21:10 UTC50m
2026-06-08 EJA438 ROC → IAD Jun 8, 18:35 UTCJun 8, 19:30 UTC55m
2026-06-08 EJA438 ROC → IAD Jun 8, 16:30 UTCJun 8, 16:55 UTC25m
2026-06-08 EJA438 ROC → IAD Jun 8, 13:35 UTCJun 8, 14:45 UTC1h 10m
2026-06-08 EJA438 ROC → IAD Jun 8, 11:40 UTCJun 8, 12:30 UTC50m
2026-06-07 EJA438 ROC → IAD Jun 7, 21:25 UTCJun 7, 23:30 UTC2h 5m
2026-06-07 EJA438 ROC → IAD Jun 7, 18:25 UTCJun 7, 19:20 UTC55m
2026-06-07 EJA438 ROC → IAD Jun 7, 01:40 UTCJun 7, 03:20 UTC1h 40m
2026-06-06 EJA438 ROC → IAD Jun 6, 21:25 UTCJun 7, 00:05 UTC2h 40m
2026-06-06 EJA438 ROC → IAD Jun 6, 20:14 UTCJun 6, 20:45 UTC30m
2026-06-06 EJA438 ROC → IAD Jun 6, 18:39 UTCJun 6, 18:50 UTC10m
2026-06-06 EJA438 ROC → IAD Jun 6, 01:05 UTCJun 6, 03:15 UTC2h 10m
2026-06-05 EJA438 ROC → IAD Jun 5, 23:30 UTCJun 5, 23:50 UTC20m
2026-06-05 EJA438 ROC → IAD Jun 5, 17:45 UTCJun 5, 19:30 UTC1h 45m
2026-06-04 EJA438 ROC → IAD Jun 4, 19:05 UTCJun 4, 20:10 UTC1h 5m
2026-06-04 N438QS - Jun 4, 16:55 UTCJun 4, 17:35 UTC40m
2026-06-03 N438QS - Jun 3, 17:35 UTCJun 4, 17:15 UTC23h 40m
2026-06-03 EJA438 ROC → IAD Jun 3, 14:05 UTCJun 3, 16:20 UTC2h 15m
2026-06-03 EJA438 ROC → IAD Jun 3, 12:20 UTCJun 3, 13:20 UTC1h 0m
2026-06-03 EJA438 ROC → IAD Jun 3, 10:10 UTCJun 3, 10:40 UTC30m
2026-06-02 EJA438 ROC → IAD Jun 2, 14:25 UTCJun 2, 14:50 UTC25m
2026-06-02 EJA438 ROC → IAD Jun 2, 13:10 UTCJun 2, 13:40 UTC30m
2026-06-01 EJA438 ROC → IAD Jun 1, 22:30 UTCJun 1, 23:10 UTC40m
2026-06-01 EJA438 ROC → IAD Jun 1, 21:05 UTCJun 1, 21:35 UTC30m
2026-06-01 EJA438 ROC → IAD Jun 1, 17:35 UTCJun 1, 19:20 UTC1h 45m
2026-05-31 EJA438 ROC → IAD May 31, 19:20 UTCJun 1, 00:50 UTC5h 30m
2026-05-31 EJA438 ROC → IAD May 31, 16:00 UTCMay 31, 18:10 UTC2h 10m
2026-05-31 EJA438 ROC → IAD May 31, 13:40 UTCMay 31, 14:15 UTC35m
2026-05-30 EJA438 ROC → IAD May 30, 17:25 UTCMay 30, 18:35 UTC1h 10m
2026-05-30 EJA438 ROC → IAD May 30, 13:35 UTCMay 30, 16:20 UTC2h 45m
2026-05-29 EJA438 ROC → IAD May 29, 21:00 UTCMay 29, 23:50 UTC2h 50m
2026-05-29 EJA438 ROC → IAD May 29, 18:45 UTCMay 29, 19:40 UTC55m
2026-05-29 EJA438 ROC → IAD May 29, 16:10 UTCMay 29, 17:40 UTC1h 30m

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 N438QS page for operator, model, and routing details .

Mode-S A54245 frequently asked

What is Mode-S code A54245?
A54245 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N438QS.
Where is Mode-S A54245 registered?
Mode-S code A54245 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 A54245 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A54245, octal 51241105, decimal 10,830,405.
What flights does A54245 operate?
Mode-S A54245 has broadcast 2 distinct callsigns, including EJA438, N438QS.