Apparatus

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sensors Mode-S transponder

A78557

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N584FX · BOMBARDIER BD-100 Challenger 350 · operated by BANK OF UTAH TRUSTEE

Hex
A78557
Octal
51702527
Decimal
10,978,647
Country
US
Tail
N584FX
Type
CL35
Broadcasting now · callsign LXJ584 · 45,000 ft
Flights observed
212
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 21:00 UTC

Current position

A78557 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A78557 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
LXJ584 - 212 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 LXJ584 - Jul 26, 20:35 UTCJul 26, 21:00 UTC25m
2026-07-26 LXJ584 - Jul 26, 16:40 UTCJul 26, 19:15 UTC2h 35m
2026-07-25 LXJ584 - Jul 25, 16:55 UTCJul 25, 19:00 UTC2h 5m
2026-07-25 LXJ584 - Jul 25, 14:00 UTCJul 25, 15:15 UTC1h 15m
2026-07-24 LXJ584 - Jul 24, 23:55 UTCJul 25, 01:05 UTC1h 10m
2026-07-24 LXJ584 DBQ → YIP Jul 24, 21:30 UTCJul 24, 22:20 UTC50m
2026-07-24 LXJ584 - Jul 24, 19:55 UTCJul 24, 20:20 UTC25m
2026-07-23 LXJ584 - Jul 23, 23:50 UTCJul 24, 18:05 UTC18h 15m
2026-07-23 LXJ584 - Jul 23, 13:05 UTCJul 23, 19:10 UTC6h 5m
2026-07-23 LXJ584 TEB → NCO Jul 23, 11:20 UTCJul 23, 11:50 UTC30m
2026-07-22 LXJ584 TEB → TEB Jul 22, 19:00 UTCJul 22, 19:45 UTC45m
2026-07-17 LXJ584 TEB → TEB Jul 17, 14:24 UTCJul 17, 14:39 UTC15m
2026-07-13 LXJ584 - Jul 13, 13:10 UTCJul 13, 13:45 UTC35m
2026-07-12 LXJ584 - Jul 12, 14:05 UTCJul 12, 15:55 UTC1h 50m
2026-07-11 LXJ584 ATL → PDK Jul 11, 14:25 UTCJul 11, 14:40 UTC15m
2026-07-10 LXJ584 - Jul 10, 22:45 UTCJul 11, 00:55 UTC2h 10m
2026-07-08 LXJ584 - Jul 8, 22:10 UTCJul 8, 22:35 UTC25m
2026-07-08 LXJ584 - Jul 8, 20:40 UTCJul 8, 21:25 UTC45m
2026-07-08 LXJ584 - Jul 8, 17:30 UTCJul 8, 18:05 UTC35m
2026-07-08 LXJ584 - Jul 8, 15:20 UTCJul 8, 15:55 UTC35m
2026-07-07 LXJ584 - Jul 7, 16:45 UTCJul 7, 20:20 UTC3h 35m
2026-07-07 LXJ584 - Jul 7, 14:30 UTCJul 7, 15:20 UTC50m
2026-07-07 LXJ584 - Jul 7, 01:45 UTCJul 7, 02:00 UTC15m
2026-07-06 LXJ584 - Jul 6, 23:00 UTCJul 7, 00:45 UTC1h 45m
2026-07-06 LXJ584 - Jul 6, 20:25 UTCJul 6, 21:10 UTC45m
2026-07-06 LXJ584 - Jul 6, 16:05 UTCJul 6, 18:15 UTC2h 10m
2026-07-06 LXJ584 - Jul 6, 01:10 UTCJul 6, 01:55 UTC45m
2026-07-05 LXJ584 - Jul 5, 23:05 UTCJul 6, 00:35 UTC1h 30m
2026-07-05 LXJ584 - Jul 5, 20:20 UTCJul 5, 21:45 UTC1h 25m
2026-07-05 LXJ584 - Jul 5, 18:20 UTCJul 5, 19:25 UTC1h 5m
2026-07-04 LXJ584 - Jul 4, 23:20 UTCJul 5, 00:10 UTC50m
2026-07-04 LXJ584 - Jul 4, 21:55 UTCJul 4, 22:40 UTC45m
2026-07-04 LXJ584 - Jul 4, 18:55 UTCJul 4, 20:25 UTC1h 30m
2026-07-04 LXJ584 SJC → OGD Jul 4, 16:00 UTCJul 4, 17:20 UTC1h 20m
2026-07-03 LXJ584 - Jul 3, 22:00 UTCJul 3, 22:25 UTC25m
2026-07-03 LXJ584 VNY → APC Jul 3, 20:10 UTCJul 3, 21:05 UTC55m
2026-07-03 LXJ584 - Jul 3, 18:40 UTCJul 3, 18:50 UTC10m
2026-06-27 LXJ584 - Jun 27, 01:19 UTCJun 27, 02:04 UTC45m
2026-06-26 LXJ584 - Jun 26, 20:55 UTCJun 26, 21:04 UTC10m
2026-06-26 LXJ584 - Jun 26, 01:54 UTCJun 26, 02:09 UTC15m
2026-06-25 LXJ584 - Jun 25, 21:15 UTCJun 25, 21:44 UTC30m
2026-06-25 LXJ584 - Jun 25, 17:49 UTCJun 25, 19:29 UTC1h 40m
2026-06-24 LXJ584 - Jun 24, 14:00 UTCJun 24, 17:14 UTC3h 15m
2026-06-24 LXJ584 - Jun 24, 11:54 UTCJun 24, 13:10 UTC1h 15m
2026-06-23 LXJ584 LGA → BOS Jun 23, 21:20 UTCJun 23, 21:54 UTC35m
2026-06-23 LXJ584 - Jun 23, 16:44 UTCJun 23, 17:44 UTC1h 0m
2026-06-23 LXJ584 - Jun 23, 13:19 UTCJun 23, 14:35 UTC1h 15m
2026-06-22 LXJ584 - Jun 22, 20:19 UTCJun 22, 21:25 UTC1h 5m
2026-06-22 LXJ584 - Jun 22, 15:54 UTCJun 22, 17:29 UTC1h 35m
2026-06-22 LXJ584 - Jun 22, 13:10 UTCJun 22, 15:10 UTC2h 0m

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 N584FX page for operator, model, and routing details .

Mode-S A78557 frequently asked

What is Mode-S code A78557?
A78557 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N584FX.
Where is Mode-S A78557 registered?
Mode-S code A78557 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 A78557 broadcasting right now?
Yes. Mode-S A78557 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A78557, octal 51702527, decimal 10,978,647.
What flights does A78557 operate?
Mode-S A78557 has broadcast 1 distinct callsign, including LXJ584.