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sensors Mode-S transponder

A559DF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N444EB · operated by AIRPLANE FACTORY INC

Hex
A559DF
Octal
51254737
Decimal
10,836,447
Country
US
Tail
N444EB
Type
SLG2
No current signal · last broadcast 2h ago
Flights observed
117
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A559DF.

Country allocation

The ICAO 24-bit address A559DF 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
N444EB - 117 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-13 N444EB TOA → TOA Jun 13, 00:00 UTCJun 13, 00:20 UTC20m
2026-06-09 N444EB TOA → TOA Jun 9, 21:45 UTCJun 9, 22:40 UTC55m
2026-06-09 N444EB - Jun 9, 20:15 UTCJun 9, 20:50 UTC35m
2026-06-09 N444EB - Jun 9, 19:15 UTCJun 9, 20:00 UTC45m
2026-06-09 N444EB - Jun 9, 16:45 UTCJun 9, 17:00 UTC15m
2026-06-09 N444EB - Jun 9, 14:45 UTCJun 9, 15:50 UTC1h 5m
2026-06-08 N444EB - Jun 8, 22:30 UTCJun 8, 23:20 UTC50m
2026-06-08 N444EB - Jun 8, 20:40 UTCJun 8, 21:35 UTC55m
2026-06-07 N444EB TOA → TOA Jun 7, 01:50 UTCJun 7, 02:14 UTC25m
2026-06-06 N444EB TOA → TOA Jun 6, 23:19 UTCJun 7, 00:49 UTC1h 30m
2026-06-05 N444EB - Jun 5, 22:45 UTCJun 5, 23:50 UTC1h 5m
2026-06-05 N444EB TOA → TOA Jun 5, 00:55 UTCJun 5, 01:35 UTC40m
2026-06-04 N444EB TOA → TOA Jun 4, 19:45 UTCJun 4, 20:55 UTC1h 10m
2026-06-03 N444EB - Jun 3, 23:10 UTCJun 3, 23:55 UTC45m
2026-06-03 N444EB TOA → TOA Jun 3, 20:15 UTCJun 3, 21:35 UTC1h 20m
2026-06-03 N444EB BUR → TOA Jun 3, 00:25 UTCJun 3, 01:40 UTC1h 15m
2026-06-02 N444EB TOA → WHP Jun 2, 23:50 UTCJun 3, 00:20 UTC30m
2026-06-02 N444EB TOA → TOA Jun 2, 22:15 UTCJun 2, 22:30 UTC15m
2026-06-02 N444EB - Jun 2, 19:05 UTCJun 2, 19:55 UTC50m
2026-06-01 N444EB TOA → TOA Jun 1, 23:00 UTCJun 1, 23:20 UTC20m
2026-05-29 N444EB SMO → TOA May 29, 23:15 UTCMay 29, 23:30 UTC15m
2026-05-29 N444EB SMO → SMO May 29, 21:10 UTCMay 29, 21:30 UTC20m
2026-05-29 N444EB SMO → SMO May 29, 20:55 UTCMay 29, 21:05 UTC10m
2026-05-29 N444EB SMO → SMO May 29, 20:25 UTCMay 29, 20:50 UTC25m
2026-05-29 N444EB SMO → SMO May 29, 16:50 UTCMay 29, 18:20 UTC1h 30m
2026-05-29 N444EB SMO → SMO May 29, 15:40 UTCMay 29, 15:50 UTC10m
2026-05-29 N444EB SMO → SMO May 29, 15:25 UTCMay 29, 15:35 UTC10m
2026-05-29 N444EB SMO → SMO May 29, 14:25 UTCMay 29, 15:20 UTC55m
2026-05-28 N444EB SMO → SMO May 28, 21:55 UTCMay 28, 22:45 UTC50m
2026-05-28 N444EB - May 28, 17:55 UTCMay 28, 19:10 UTC1h 15m
2026-05-28 N444EB - May 28, 14:20 UTCMay 28, 15:30 UTC1h 10m
2026-05-28 N444EB SMO → SMO May 28, 01:35 UTCMay 28, 01:45 UTC10m
2026-05-28 N444EB - May 28, 00:30 UTCMay 28, 01:30 UTC1h 0m
2026-05-27 N444EB SMO → SMO May 27, 19:00 UTCMay 27, 19:10 UTC10m
2026-05-26 N444EB SMO → SMO May 26, 21:40 UTCMay 26, 22:50 UTC1h 10m
2026-05-25 N444EB SBD → SMO May 25, 21:45 UTCMay 25, 23:10 UTC1h 25m
2026-05-25 N444EB SMO → SBD May 25, 20:50 UTCMay 25, 21:40 UTC50m
2026-05-25 N444EB - May 25, 19:05 UTCMay 25, 19:10 UTC5m
2026-05-25 N444EB SMO → SMO May 25, 18:30 UTCMay 25, 19:00 UTC30m
2026-05-25 N444EB SMO → SMO May 25, 17:30 UTCMay 25, 17:35 UTC5m
2026-05-22 N444EB - May 22, 21:15 UTCMay 22, 22:35 UTC1h 20m
2026-05-21 N444EB - May 21, 18:15 UTCMay 21, 19:45 UTC1h 30m
2026-05-21 N444EB - May 21, 14:45 UTCMay 21, 15:40 UTC55m
2026-05-21 N444EB SMO → SMO May 21, 01:50 UTCMay 21, 02:40 UTC50m
2026-05-20 N444EB SMO → SMO May 20, 23:45 UTCMay 21, 01:10 UTC1h 25m
2026-05-20 N444EB - May 20, 21:55 UTCMay 20, 22:40 UTC45m
2026-05-20 N444EB SMO → SMO May 20, 19:30 UTCMay 20, 20:15 UTC45m
2026-05-20 N444EB - May 20, 17:00 UTCMay 20, 18:10 UTC1h 10m
2026-05-19 N444EB - May 19, 23:05 UTCMay 20, 00:05 UTC1h 0m
2026-05-19 N444EB SMO → SMO May 19, 21:00 UTCMay 19, 22:25 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 N444EB page for operator, model, and routing details .

Mode-S A559DF frequently asked

What is Mode-S code A559DF?
A559DF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N444EB.
Where is Mode-S A559DF registered?
Mode-S code A559DF 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 A559DF broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A559DF, octal 51254737, decimal 10,836,447.
What flights does A559DF operate?
Mode-S A559DF has broadcast 1 distinct callsign, including N444EB.