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sensors Mode-S transponder

A6E866

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N544SP · CESSNA 172 Skyhawk · operated by SILVERHAWK AVIATION ACADEMY LLC

Hex
A6E866
Octal
51564146
Decimal
10,938,470
Country
US
Tail
N544SP
Type
C172
No current signal · last broadcast 1h ago
Flights observed
153
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A6E866.

Country allocation

The ICAO 24-bit address A6E866 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
N544SP - 153 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-16 N544SP - Jun 16, 00:50 UTCJun 16, 02:09 UTC1h 20m
2026-06-15 N544SP - Jun 15, 21:20 UTCJun 15, 21:45 UTC25m
2026-06-15 N544SP - Jun 15, 18:35 UTCJun 15, 19:50 UTC1h 15m
2026-06-15 N544SP - Jun 15, 17:04 UTCJun 15, 17:45 UTC40m
2026-06-15 N544SP - Jun 15, 14:34 UTCJun 15, 15:40 UTC1h 5m
2026-06-15 N544SP - Jun 15, 00:55 UTCJun 15, 01:45 UTC50m
2026-06-14 N544SP - Jun 14, 22:45 UTCJun 14, 23:39 UTC54m
2026-06-14 N544SP - Jun 14, 20:35 UTCJun 14, 21:55 UTC1h 20m
2026-06-14 N544SP - Jun 14, 18:40 UTCJun 14, 19:25 UTC45m
2026-06-14 N544SP - Jun 14, 16:45 UTCJun 14, 17:20 UTC35m
2026-06-14 N544SP - Jun 14, 14:40 UTCJun 14, 15:40 UTC1h 0m
2026-06-13 N544SP - Jun 13, 21:05 UTCJun 13, 21:25 UTC20m
2026-06-13 N544SP - Jun 13, 18:50 UTCJun 13, 19:20 UTC30m
2026-06-13 N544SP - Jun 13, 16:30 UTCJun 13, 17:30 UTC1h 0m
2026-06-13 N544SP - Jun 13, 14:50 UTCJun 13, 15:45 UTC55m
2026-06-13 N544SP - Jun 13, 00:45 UTCJun 13, 01:45 UTC1h 0m
2026-06-12 N544SP - Jun 12, 22:40 UTCJun 12, 23:35 UTC55m
2026-06-12 N544SP - Jun 12, 20:55 UTCJun 12, 21:45 UTC50m
2026-06-12 N544SP - Jun 12, 18:45 UTCJun 12, 19:55 UTC1h 10m
2026-06-12 N544SP - Jun 12, 16:35 UTCJun 12, 17:35 UTC1h 0m
2026-06-12 N544SP - Jun 12, 15:05 UTCJun 12, 15:45 UTC40m
2026-06-12 N544SP - Jun 12, 03:50 UTCJun 12, 04:20 UTC30m
2026-06-12 N544SP - Jun 12, 01:10 UTCJun 12, 01:35 UTC25m
2026-06-11 N544SP - Jun 11, 22:50 UTCJun 12, 00:00 UTC1h 10m
2026-06-11 N544SP - Jun 11, 20:35 UTCJun 11, 21:30 UTC55m
2026-06-11 N544SP - Jun 11, 16:50 UTCJun 11, 17:45 UTC55m
2026-06-11 N544SP - Jun 11, 14:30 UTCJun 11, 15:35 UTC1h 5m
2026-06-11 N544SP - Jun 11, 13:20 UTCJun 11, 13:40 UTC20m
2026-06-11 N544SP - Jun 11, 12:25 UTCJun 11, 12:45 UTC20m
2026-06-11 N544SP - Jun 11, 06:40 UTCJun 11, 07:35 UTC55m
2026-06-11 N544SP - Jun 11, 04:45 UTCJun 11, 05:50 UTC1h 5m
2026-06-10 N544SP - Jun 10, 19:40 UTCJun 10, 20:45 UTC1h 5m
2026-06-10 N544SP - Jun 10, 16:40 UTCJun 10, 17:45 UTC1h 5m
2026-06-10 N544SP - Jun 10, 14:20 UTCJun 10, 15:30 UTC1h 10m
2026-06-10 N544SP - Jun 10, 12:40 UTCJun 10, 13:45 UTC1h 5m
2026-06-10 N544SP - Jun 10, 04:55 UTCJun 10, 05:30 UTC35m
2026-06-10 N544SP - Jun 10, 03:30 UTCJun 10, 03:50 UTC20m
2026-06-10 N544SP - Jun 10, 01:10 UTCJun 10, 01:40 UTC30m
2026-06-09 N544SP - Jun 9, 22:30 UTCJun 9, 23:15 UTC45m
2026-06-09 N544SP - Jun 9, 20:30 UTCJun 9, 21:40 UTC1h 10m
2026-06-09 N544SP - Jun 9, 14:50 UTCJun 9, 15:50 UTC1h 0m
2026-06-09 N544SP - Jun 9, 05:20 UTCJun 9, 06:30 UTC1h 10m
2026-06-08 N544SP - Jun 8, 20:45 UTCJun 8, 21:45 UTC1h 0m
2026-06-08 N544SP - Jun 8, 18:55 UTCJun 8, 19:55 UTC1h 0m
2026-06-07 N544SP - Jun 7, 20:35 UTCJun 7, 21:10 UTC35m
2026-06-07 N544SP - Jun 7, 18:35 UTCJun 7, 19:25 UTC50m
2026-06-07 N544SP - Jun 7, 16:30 UTCJun 7, 17:30 UTC1h 0m
2026-06-07 N544SP - Jun 7, 14:40 UTCJun 7, 15:20 UTC40m
2026-06-06 N544SP - Jun 6, 14:50 UTCJun 6, 15:50 UTC1h 0m
2026-06-05 N544SP - Jun 5, 18:45 UTCJun 5, 19:45 UTC1h 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 N544SP page for operator, model, and routing details .

Mode-S A6E866 frequently asked

What is Mode-S code A6E866?
A6E866 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N544SP.
Where is Mode-S A6E866 registered?
Mode-S code A6E866 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 A6E866 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6E866, octal 51564146, decimal 10,938,470.
What flights does A6E866 operate?
Mode-S A6E866 has broadcast 1 distinct callsign, including N544SP.