Apparatus

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sensors Mode-S transponder

A47815

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N3873J · BEECH 36 Bonanza · operated by SALTERS JAMES C

Hex
A47815
Octal
51074025
Decimal
10,778,645
Country
US
Tail
N3873J
Type
BE36
No current signal · last broadcast Jun 25, 03:34 UTC
Flights observed
22
Distinct callsigns
1
Country
US
Last broadcast
Jun 25, 03:34 UTC

Last known position

Most recent position reported by Mode-S A47815.

Country allocation

The ICAO 24-bit address A47815 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
N3873J - 22 2026-06-25

Recent flights last 22

DateFlightRouteTakeoffLandingDuration
2026-06-25 N3873J - Jun 25, 01:35 UTCJun 25, 03:34 UTC2h 0m
2026-06-24 N3873J - Jun 24, 23:50 UTCJun 25, 00:35 UTC45m
2026-06-23 N3873J - Jun 23, 02:15 UTCJun 23, 02:55 UTC40m
2026-06-22 N3873J - Jun 22, 23:14 UTCJun 23, 01:25 UTC2h 10m
2026-06-17 N3873J - Jun 17, 18:35 UTCJun 17, 20:15 UTC1h 40m
2026-06-17 N3873J - Jun 17, 17:00 UTCJun 17, 17:35 UTC35m
2026-06-11 N3873J - Jun 11, 12:45 UTCJun 11, 16:30 UTC3h 45m
2026-06-06 N3873J - Jun 6, 16:34 UTCJun 6, 18:19 UTC1h 45m
2026-05-31 N3873J - May 31, 18:20 UTCMay 31, 20:05 UTC1h 45m
2026-05-01 N3873J - May 1, 23:55 UTCMay 2, 03:25 UTC3h 30m
2026-05-01 N3873J - May 1, 15:10 UTCMay 1, 17:15 UTC2h 5m
2026-04-29 N3873J - Apr 29, 15:20 UTCApr 29, 16:00 UTC40m
2026-04-29 N3873J - Apr 29, 12:10 UTCApr 29, 14:25 UTC2h 15m
2026-04-24 N3873J - Apr 24, 15:55 UTCApr 24, 18:00 UTC2h 5m
2026-04-24 N3873J - Apr 24, 14:25 UTCApr 24, 15:15 UTC50m
2026-04-22 N3873J - Apr 22, 19:00 UTCApr 22, 19:40 UTC40m
2026-04-22 N3873J - Apr 22, 16:15 UTCApr 22, 18:30 UTC2h 15m
2026-04-19 N3873J - Apr 19, 17:20 UTCApr 19, 18:05 UTC45m
2026-04-19 N3873J - Apr 19, 16:10 UTCApr 19, 16:50 UTC40m
2026-04-13 N3873J - Apr 13, 16:55 UTCApr 13, 17:40 UTC45m
2026-04-13 N3873J - Apr 13, 16:15 UTCApr 13, 16:25 UTC10m
2026-04-13 N3873J - Apr 13, 16:00 UTCApr 13, 16:15 UTC15m

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 N3873J page for operator, model, and routing details .

Mode-S A47815 frequently asked

What is Mode-S code A47815?
A47815 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N3873J.
Where is Mode-S A47815 registered?
Mode-S code A47815 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 A47815 broadcasting right now?
No active broadcast right now. Last signal was Jun 25, 03:34 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A47815, octal 51074025, decimal 10,778,645.
What flights does A47815 operate?
Mode-S A47815 has broadcast 1 distinct callsign, including N3873J.