Apparatus

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sensors Mode-S transponder

A638CE

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N50NL · DASSAULT Falcon 7X · operated by 50NL LLC

Hex
A638CE
Octal
51434316
Decimal
10,893,518
Country
US
Tail
N50NL
Type
FA7X
No current signal · last broadcast 1d ago
Flights observed
54
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A638CE.

Country allocation

The ICAO 24-bit address A638CE 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 1 distinct

Callsign Airline Flights Last seen
TWY50 - 54 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TWY50 ATL → SBA Jul 26, 13:50 UTCJul 26, 17:30 UTC3h 40m
2026-07-26 TWY50 - Jul 26, 11:50 UTCJul 26, 13:05 UTC1h 15m
2026-07-25 TWY50 SBA → MDW Jul 25, 14:40 UTCJul 25, 18:10 UTC3h 30m
2026-07-24 TWY50 MMU → SBA Jul 24, 18:55 UTCJul 25, 00:00 UTC5h 5m
2026-07-23 TWY50 - Jul 23, 15:35 UTCJul 23, 17:00 UTC1h 25m
2026-07-23 TWY50 ATL → MDW Jul 23, 13:05 UTCJul 23, 14:30 UTC1h 25m
2026-07-22 TWY50 - Jul 22, 11:10 UTCJul 22, 12:50 UTC1h 40m
2026-07-21 TWY50 - Jul 21, 16:55 UTCJul 21, 17:30 UTC35m
2026-07-20 TWY50 SBA → BED Jul 20, 14:20 UTCJul 20, 19:20 UTC5h 0m
2026-07-14 TWY50 ATL → SBA Jul 14, 02:25 UTCJul 14, 06:10 UTC3h 45m
2026-07-10 TWY50 - Jul 10, 22:20 UTCJul 10, 22:30 UTC10m
2026-07-10 TWY50 BED → PDK Jul 10, 19:10 UTCJul 10, 21:15 UTC2h 5m
2026-07-09 TWY50 ATL → BED Jul 9, 23:15 UTCJul 10, 01:15 UTC2h 0m
2026-07-09 TWY50 SBA → ATL Jul 9, 18:45 UTCJul 9, 22:40 UTC3h 55m
2026-07-06 TWY50 TEB → SBA Jul 6, 20:15 UTCJul 7, 01:10 UTC4h 55m
2026-07-06 TWY50 BDL → TEB Jul 6, 16:25 UTCJul 6, 17:10 UTC45m
2026-07-05 TWY50 - Jul 5, 21:00 UTCJul 6, 01:35 UTC4h 35m
2026-06-29 TWY50 - Jun 29, 23:54 UTCJun 30, 00:14 UTC20m
2026-06-29 TWY50 SBA → BUR Jun 29, 16:29 UTCJun 29, 16:50 UTC20m
2026-06-28 TWY50 BFI → SBA Jun 28, 04:05 UTCJun 28, 05:55 UTC1h 50m
2026-06-27 TWY50 - Jun 27, 22:09 UTCJun 27, 23:45 UTC1h 35m
2026-06-26 TWY50 SBA → SFO Jun 26, 23:19 UTCJun 27, 00:05 UTC45m
2026-06-25 TWY50 - Jun 25, 05:09 UTCJun 25, 05:50 UTC40m
2026-06-24 TWY50 SBA → SFO Jun 24, 22:14 UTCJun 24, 23:04 UTC50m
2026-06-20 TWY50 PDK → SBA Jun 20, 22:10 UTCJun 21, 02:24 UTC4h 15m
2026-06-19 TWY50 SBA → PDK Jun 19, 18:59 UTCJun 19, 22:39 UTC3h 40m
2026-06-12 TWY50 ATL → SBA Jun 12, 19:40 UTCJun 12, 23:50 UTC4h 10m
2026-06-12 TWY50 - Jun 12, 17:50 UTCJun 12, 18:05 UTC15m
2026-06-11 TWY50 - Jun 11, 22:55 UTCJun 11, 23:05 UTC10m
2026-06-11 TWY50 SBA → ATL Jun 11, 18:40 UTCJun 11, 22:20 UTC3h 40m
2026-06-07 TWY50 ATL → SBA Jun 7, 01:15 UTCJun 7, 05:30 UTC4h 15m
2026-06-05 TWY50 - Jun 5, 21:30 UTCJun 6, 01:15 UTC3h 45m
2026-06-05 TWY50 PDK → SBA Jun 5, 16:25 UTCJun 5, 20:45 UTC4h 20m
2026-06-05 TWY50 - Jun 5, 01:55 UTCJun 5, 02:55 UTC1h 0m
2026-06-03 TWY50 SBA → IND Jun 3, 18:50 UTCJun 3, 22:30 UTC3h 40m
2026-05-30 TWY50 - May 30, 05:05 UTCMay 30, 06:45 UTC1h 40m
2026-05-29 TWY50 - May 29, 22:20 UTCMay 30, 00:05 UTC1h 45m
2026-05-24 TWY50 ATL → SBA May 24, 23:00 UTCMay 25, 03:15 UTC4h 15m
2026-05-24 TWY50 - May 24, 18:50 UTCMay 24, 19:05 UTC15m
2026-05-21 TWY50 - May 21, 18:45 UTCMay 21, 22:35 UTC3h 50m
2026-05-20 TWY50 - May 20, 20:55 UTCMay 21, 01:10 UTC4h 15m
2026-05-20 TWY50 BOS → PDK May 20, 18:10 UTCMay 20, 20:05 UTC1h 55m
2026-05-18 TWY50 - May 18, 22:00 UTCMay 19, 00:05 UTC2h 5m
2026-05-16 TWY50 SBA → PDK May 16, 22:25 UTCMay 17, 02:00 UTC3h 35m
2026-05-13 TWY50 - May 13, 02:50 UTCMay 13, 05:35 UTC2h 45m
2026-05-12 TWY50 - May 12, 19:50 UTCMay 12, 22:31 UTC2h 40m
2026-04-18 TWY50 - Apr 18, 01:25 UTCApr 18, 02:45 UTC1h 20m
2026-04-17 TWY50 - Apr 17, 23:25 UTCApr 18, 01:20 UTC1h 55m
2026-04-17 TWY50 - Apr 17, 22:20 UTCApr 17, 23:20 UTC1h 0m
2026-04-17 TWY50 - Apr 17, 05:20 UTCApr 17, 05:30 UTC10m

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 N50NL page for operator, model, and routing details .

Mode-S A638CE frequently asked

What is Mode-S code A638CE?
A638CE is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N50NL.
Where is Mode-S A638CE registered?
Mode-S code A638CE 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 A638CE broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A638CE, octal 51434316, decimal 10,893,518.
What flights does A638CE operate?
Mode-S A638CE has broadcast 1 distinct callsign, including TWY50.