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sensors Mode-S transponder

A78A19

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N585SP · CIRRUS SR-20 · operated by BLUESKY 585SP INC

Hex
A78A19
Octal
51705031
Decimal
10,979,865
Country
US
Tail
N585SP
Type
SR20
Broadcasting now · callsign N585SP · 2,425 ft
Flights observed
109
Distinct callsigns
1
Country
US
Last broadcast
25d ago

Current position

A78A19 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A78A19 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
N585SP - 109 2026-07-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-22 N585SP - Jul 22, 20:35 UTCJul 22, 20:45 UTC10m
2026-07-22 N585SP - Jul 22, 18:00 UTCJul 22, 18:50 UTC50m
2026-07-22 N585SP - Jul 22, 14:45 UTCJul 22, 16:55 UTC2h 10m
2026-07-22 N585SP - Jul 22, 11:30 UTCJul 22, 13:45 UTC2h 15m
2026-07-21 N585SP - Jul 21, 20:25 UTCJul 21, 20:35 UTC10m
2026-07-21 N585SP - Jul 21, 13:00 UTCJul 21, 13:35 UTC35m
2026-07-20 N585SP - Jul 20, 19:05 UTCJul 20, 20:00 UTC55m
2026-07-20 N585SP - Jul 20, 14:45 UTCJul 20, 15:40 UTC55m
2026-07-20 N585SP - Jul 20, 11:05 UTCJul 20, 11:55 UTC50m
2026-07-19 N585SP - Jul 19, 21:25 UTCJul 19, 23:15 UTC1h 50m
2026-07-19 N585SP - Jul 19, 15:35 UTCJul 19, 17:55 UTC2h 20m
2026-07-18 N585SP - Jul 18, 20:50 UTCJul 18, 21:00 UTC10m
2026-07-18 N585SP - Jul 18, 19:40 UTCJul 18, 19:50 UTC10m
2026-07-17 N585SP - Jul 17, 12:40 UTCJul 17, 13:45 UTC1h 5m
2026-07-16 N585SP - Jul 16, 10:50 UTCJul 16, 11:40 UTC50m
2026-07-15 N585SP - Jul 15, 20:45 UTCJul 15, 21:25 UTC40m
2026-07-15 N585SP - Jul 15, 19:00 UTCJul 15, 19:50 UTC50m
2026-07-07 N585SP - Jul 7, 15:20 UTCJul 7, 15:40 UTC20m
2026-07-07 N585SP - Jul 7, 12:50 UTCJul 7, 13:30 UTC40m
2026-07-06 N585SP - Jul 6, 11:30 UTCJul 6, 13:05 UTC1h 35m
2026-07-05 N585SP - Jul 5, 14:30 UTCJul 5, 15:25 UTC55m
2026-07-03 N585SP CAE → CAE Jul 3, 10:35 UTCJul 3, 11:45 UTC1h 10m
2026-07-02 N585SP - Jul 2, 20:40 UTCJul 2, 21:45 UTC1h 5m
2026-07-02 N585SP - Jul 2, 19:15 UTCJul 2, 19:40 UTC25m
2026-07-02 N585SP - Jul 2, 12:55 UTCJul 2, 13:40 UTC45m
2026-07-01 N585SP - Jul 1, 22:30 UTCJul 2, 01:10 UTC2h 40m
2026-07-01 N585SP - Jul 1, 20:00 UTCJul 1, 21:25 UTC1h 25m
2026-07-01 N585SP - Jul 1, 16:10 UTCJul 1, 19:20 UTC3h 10m
2026-07-01 N585SP - Jul 1, 12:55 UTCJul 1, 14:25 UTC1h 30m
2026-07-01 N585SP - Jul 1, 10:25 UTCJul 1, 12:10 UTC1h 45m
2026-06-30 N585SP - Jun 30, 16:55 UTCJun 30, 17:30 UTC35m
2026-06-30 N585SP - Jun 30, 13:05 UTCJun 30, 13:40 UTC35m
2026-06-29 N585SP - Jun 29, 21:05 UTCJun 29, 21:14 UTC10m
2026-06-28 N585SP - Jun 28, 14:45 UTCJun 28, 16:39 UTC1h 55m
2026-06-24 N585SP - Jun 24, 21:34 UTCJun 24, 21:44 UTC10m
2026-06-24 N585SP - Jun 24, 19:55 UTCJun 24, 20:44 UTC50m
2026-06-23 N585SP - Jun 23, 19:19 UTCJun 23, 19:34 UTC15m
2026-06-22 N585SP - Jun 22, 16:10 UTCJun 22, 16:54 UTC45m
2026-06-22 N585SP - Jun 22, 01:29 UTCJun 22, 02:45 UTC1h 15m
2026-06-21 N585SP - Jun 21, 22:54 UTCJun 21, 23:44 UTC50m
2026-06-21 N585SP - Jun 21, 18:50 UTCJun 21, 19:14 UTC25m
2026-06-21 N585SP - Jun 21, 15:44 UTCJun 21, 15:54 UTC10m
2026-06-20 N585SP - Jun 20, 19:55 UTCJun 20, 20:09 UTC15m
2026-06-20 N585SP - Jun 20, 18:45 UTCJun 20, 18:59 UTC15m
2026-06-20 N585SP - Jun 20, 16:59 UTCJun 20, 17:34 UTC35m
2026-06-20 N585SP - Jun 20, 12:59 UTCJun 20, 13:24 UTC25m
2026-06-20 N585SP - Jun 20, 10:55 UTCJun 20, 11:25 UTC30m
2026-06-20 N585SP - Jun 20, 01:39 UTCJun 20, 02:35 UTC55m
2026-06-19 N585SP - Jun 19, 22:34 UTCJun 19, 22:45 UTC10m
2026-06-19 N585SP - Jun 19, 20:40 UTCJun 19, 21:09 UTC30m

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 N585SP page for operator, model, and routing details .

Mode-S A78A19 frequently asked

What is Mode-S code A78A19?
A78A19 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N585SP.
Where is Mode-S A78A19 registered?
Mode-S code A78A19 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 A78A19 broadcasting right now?
Yes. Mode-S A78A19 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A78A19, octal 51705031, decimal 10,979,865.
What flights does A78A19 operate?
Mode-S A78A19 has broadcast 1 distinct callsign, including N585SP.