Apparatus

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sensors Mode-S transponder

A8758F

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N644RA · ROBINSON R-44 Raven · operated by BOSTON HELICOPTERS

Hex
A8758F
Octal
52072617
Decimal
11,040,143
Country
US
Tail
N644RA
Type
R44
No current signal · last broadcast 13h ago
Flights observed
120
Distinct callsigns
1
Country
US
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S A8758F.

Country allocation

The ICAO 24-bit address A8758F 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
N644RA - 120 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N644RA - Jul 13, 22:00 UTCJul 13, 23:10 UTC1h 10m
2026-07-13 N644RA - Jul 13, 12:45 UTCJul 13, 13:35 UTC50m
2026-07-11 N644RA - Jul 11, 23:50 UTCJul 12, 00:30 UTC40m
2026-07-11 N644RA - Jul 11, 20:35 UTCJul 11, 20:45 UTC10m
2026-07-11 N644RA - Jul 11, 19:25 UTCJul 11, 20:00 UTC35m
2026-07-11 N644RA LWM → LWM Jul 11, 16:25 UTCJul 11, 16:55 UTC30m
2026-07-10 N644RA - Jul 10, 20:55 UTCJul 10, 21:40 UTC45m
2026-07-10 N644RA - Jul 10, 18:00 UTCJul 10, 19:50 UTC1h 50m
2026-07-10 N644RA - Jul 10, 15:00 UTCJul 10, 15:45 UTC45m
2026-07-09 N644RA - Jul 9, 13:55 UTCJul 9, 15:10 UTC1h 15m
2026-07-08 N644RA LWM → LWM Jul 8, 20:15 UTCJul 8, 21:25 UTC1h 10m
2026-07-08 N644RA - Jul 8, 17:55 UTCJul 8, 18:40 UTC45m
2026-07-08 N644RA - Jul 8, 15:00 UTCJul 8, 15:45 UTC45m
2026-07-06 N644RA - Jul 6, 12:50 UTCJul 6, 13:30 UTC40m
2026-07-04 N644RA - Jul 4, 16:30 UTCJul 4, 17:25 UTC55m
2026-07-03 N644RA LWM → LWM Jul 3, 12:55 UTCJul 3, 13:50 UTC55m
2026-07-02 N644RA - Jul 2, 22:15 UTCJul 2, 22:55 UTC40m
2026-07-02 N644RA - Jul 2, 18:50 UTCJul 2, 20:40 UTC1h 50m
2026-07-01 N644RA LWM → LWM Jul 1, 19:35 UTCJul 1, 20:00 UTC25m
2026-06-30 N644RA - Jun 30, 19:20 UTCJun 30, 20:40 UTC1h 20m
2026-06-30 N644RA - Jun 30, 15:20 UTCJun 30, 17:05 UTC1h 45m
2026-06-29 N644RA - Jun 29, 19:20 UTCJun 29, 20:24 UTC1h 5m
2026-06-26 N644RA LWM → LWM Jun 26, 19:50 UTCJun 26, 20:04 UTC15m
2026-06-25 N644RA - Jun 25, 18:15 UTCJun 25, 19:09 UTC55m
2026-06-24 N644RA LWM → LWM Jun 24, 16:19 UTCJun 24, 16:29 UTC10m
2026-06-22 N644RA - Jun 22, 15:45 UTCJun 22, 16:29 UTC45m
2026-06-22 N644RA - Jun 22, 14:24 UTCJun 22, 14:40 UTC15m
2026-06-22 N644RA - Jun 22, 12:44 UTCJun 22, 13:05 UTC20m
2026-06-21 N644RA - Jun 21, 15:40 UTCJun 21, 17:05 UTC1h 25m
2026-06-20 N644RA LWM → LWM Jun 20, 17:44 UTCJun 20, 18:45 UTC1h 0m
2026-06-20 N644RA LWM → LWM Jun 20, 13:24 UTCJun 20, 13:44 UTC20m
2026-06-20 N644RA - Jun 20, 00:19 UTCJun 20, 00:54 UTC35m
2026-06-19 N644RA - Jun 19, 23:09 UTCJun 19, 23:44 UTC35m
2026-06-17 N644RA - Jun 17, 20:10 UTCJun 17, 21:05 UTC55m
2026-06-17 N644RA - Jun 17, 15:50 UTCJun 17, 17:00 UTC1h 10m
2026-06-16 N644RA - Jun 16, 20:00 UTCJun 16, 20:55 UTC55m
2026-06-16 N644RA - Jun 16, 18:55 UTCJun 16, 19:15 UTC20m
2026-06-15 N644RA - Jun 15, 17:34 UTCJun 15, 18:15 UTC40m
2026-06-15 N644RA - Jun 15, 15:30 UTCJun 15, 16:19 UTC50m
2026-06-15 N644RA - Jun 15, 13:00 UTCJun 15, 13:25 UTC25m
2026-06-14 N644RA - Jun 14, 21:50 UTCJun 14, 23:05 UTC1h 15m
2026-06-14 N644RA - Jun 14, 20:20 UTCJun 14, 20:35 UTC15m
2026-06-14 N644RA - Jun 14, 18:50 UTCJun 14, 19:45 UTC55m
2026-06-13 N644RA - Jun 13, 19:25 UTCJun 13, 20:00 UTC35m
2026-06-12 N644RA - Jun 12, 23:45 UTCJun 13, 00:10 UTC25m
2026-06-11 N644RA - Jun 11, 19:00 UTCJun 11, 19:25 UTC25m
2026-06-11 N644RA - Jun 11, 17:30 UTCJun 11, 18:00 UTC30m
2026-06-10 N644RA - Jun 10, 19:10 UTCJun 10, 19:20 UTC10m
2026-06-10 N644RA - Jun 10, 18:15 UTCJun 10, 18:25 UTC10m
2026-06-10 N644RA - Jun 10, 14:35 UTCJun 10, 14:45 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 N644RA page for operator, model, and routing details .

Mode-S A8758F frequently asked

What is Mode-S code A8758F?
A8758F is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N644RA.
Where is Mode-S A8758F registered?
Mode-S code A8758F 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 A8758F broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8758F, octal 52072617, decimal 11,040,143.
What flights does A8758F operate?
Mode-S A8758F has broadcast 1 distinct callsign, including N644RA.