Apparatus

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sensors Mode-S transponder

A56512

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N447ER · operated by SILVER EXPRESS DBA, FLYING ACADEMY

Hex
A56512
Octal
51262422
Decimal
10,839,314
Country
US
Tail
N447ER
Type
C172
No current signal · last broadcast 7h ago
Flights observed
131
Distinct callsigns
1
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A56512.

Country allocation

The ICAO 24-bit address A56512 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
N447ER - 131 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-04 N447ER - Jun 4, 16:40 UTCJun 4, 17:05 UTC25m
2026-06-04 N447ER - Jun 4, 15:10 UTCJun 4, 15:55 UTC45m
2026-06-04 N447ER TMB → TMB Jun 4, 12:50 UTCJun 4, 14:00 UTC1h 10m
2026-05-30 N447ER - May 30, 15:20 UTCMay 30, 15:50 UTC30m
2026-05-30 N447ER TMB → TMB May 30, 13:15 UTCMay 30, 14:15 UTC1h 0m
2026-05-29 N447ER - May 29, 13:50 UTCMay 29, 14:50 UTC1h 0m
2026-05-28 N447ER TMB → TMB May 28, 21:05 UTCMay 28, 22:20 UTC1h 15m
2026-05-27 N447ER TMB → TMB May 27, 21:10 UTCMay 27, 22:20 UTC1h 10m
2026-05-27 N447ER TMB → TMB May 27, 19:00 UTCMay 27, 19:55 UTC55m
2026-05-27 N447ER TMB → TMB May 27, 14:50 UTCMay 27, 16:05 UTC1h 15m
2026-05-26 N447ER TMB → TMB May 26, 20:54 UTCMay 26, 21:55 UTC1h 0m
2026-05-23 N447ER - May 23, 14:55 UTCMay 23, 15:50 UTC55m
2026-05-23 N447ER TMB → TMB May 23, 02:30 UTCMay 23, 04:55 UTC2h 25m
2026-05-22 N447ER TMB → TMB May 22, 22:00 UTCMay 23, 01:00 UTC3h 0m
2026-05-22 N447ER TMB → TMB May 22, 12:40 UTCMay 22, 13:40 UTC1h 0m
2026-05-21 N447ER TMB → TMB May 21, 17:25 UTCMay 21, 18:00 UTC35m
2026-05-21 N447ER TMB → TMB May 21, 01:45 UTCMay 21, 04:45 UTC3h 0m
2026-05-20 N447ER - May 20, 20:55 UTCMay 20, 22:05 UTC1h 10m
2026-05-20 N447ER TMB → TMB May 20, 18:45 UTCMay 20, 19:55 UTC1h 10m
2026-05-20 N447ER TMB → TMB May 20, 16:15 UTCMay 20, 17:25 UTC1h 10m
2026-05-20 N447ER TMB → TMB May 20, 13:00 UTCMay 20, 13:55 UTC55m
2026-05-18 N447ER - May 18, 17:40 UTCMay 18, 19:05 UTC1h 24m
2026-05-18 N447ER - May 18, 15:20 UTCMay 18, 15:55 UTC35m
2026-05-16 N447ER - May 16, 21:40 UTCMay 16, 23:50 UTC2h 10m
2026-05-16 N447ER - May 16, 17:45 UTCMay 16, 18:15 UTC30m
2026-05-16 N447ER TMB → TMB May 16, 12:21 UTCMay 16, 12:55 UTC35m
2026-05-15 N447ER TMB → TMB May 15, 19:30 UTCMay 15, 21:30 UTC2h 0m
2026-05-15 N447ER - May 15, 16:55 UTCMay 15, 18:00 UTC1h 5m
2026-05-15 N447ER TMB → TMB May 15, 14:30 UTCMay 15, 15:50 UTC1h 19m
2026-05-14 N447ER - May 14, 19:00 UTCMay 14, 21:35 UTC2h 35m
2026-05-14 N447ER - May 14, 17:05 UTCMay 14, 17:55 UTC50m
2026-05-14 N447ER TMB → TMB May 14, 12:50 UTCMay 14, 15:40 UTC2h 50m
2026-05-14 N447ER - May 14, 01:50 UTCMay 14, 02:10 UTC20m
2026-05-14 N447ER TMB → TMB May 14, 01:35 UTCMay 14, 01:45 UTC10m
2026-05-14 N447ER TMB → TMB May 14, 01:10 UTCMay 14, 01:20 UTC10m
2026-05-14 N447ER - May 14, 00:35 UTCMay 14, 01:05 UTC30m
2026-05-13 N447ER TMB → TMB May 13, 19:00 UTCMay 13, 19:55 UTC55m
2026-05-13 N447ER - May 13, 16:55 UTCMay 13, 17:35 UTC40m
2026-05-13 N447ER - May 13, 02:30 UTCMay 13, 02:55 UTC25m
2026-05-13 N447ER - May 13, 00:40 UTCMay 13, 01:10 UTC30m
2026-05-12 N447ER TMB → TMB May 12, 18:15 UTCMay 12, 19:00 UTC45m
2026-05-11 N447ER TMB → TMB May 11, 12:35 UTCMay 11, 14:00 UTC1h 25m
2026-05-10 N447ER - May 10, 17:49 UTCMay 10, 21:00 UTC3h 10m
2026-05-10 N447ER TMB → TMB May 10, 14:25 UTCMay 10, 15:15 UTC50m
2026-05-09 N447ER TMB → TMB May 9, 19:00 UTCMay 9, 19:35 UTC35m
2026-05-09 N447ER - May 9, 16:40 UTCMay 9, 18:05 UTC1h 25m
2026-05-09 N447ER TMB → TMB May 9, 14:30 UTCMay 9, 15:20 UTC50m
2026-05-09 N447ER TMB → TMB May 9, 13:00 UTCMay 9, 13:55 UTC55m
2026-05-08 N447ER - May 8, 18:45 UTCMay 8, 19:50 UTC1h 5m
2026-05-08 N447ER TMB → TMB May 8, 17:05 UTCMay 8, 17:40 UTC35m

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 N447ER page for operator, model, and routing details .

Mode-S A56512 frequently asked

What is Mode-S code A56512?
A56512 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N447ER.
Where is Mode-S A56512 registered?
Mode-S code A56512 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 A56512 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A56512, octal 51262422, decimal 10,839,314.
What flights does A56512 operate?
Mode-S A56512 has broadcast 1 distinct callsign, including N447ER.