Apparatus

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sensors Mode-S transponder

A6EADD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N545DU · AIRBUS HELICOPTERS EC-145 · operated by METRO AVIATION INC

Hex
A6EADD
Octal
51565335
Decimal
10,939,101
Country
US
Tail
N545DU
Type
EC45
Broadcasting now · callsign N545DU · 1,275 ft
Flights observed
253
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Current position

A6EADD is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A6EADD 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
N545DU - 253 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-22 N545DU - Jun 22, 17:44 UTCJun 22, 17:55 UTC10m
2026-06-22 N545DU - Jun 22, 16:20 UTCJun 22, 16:29 UTC10m
2026-06-22 N545DU - Jun 22, 11:50 UTCJun 22, 12:00 UTC10m
2026-06-22 N545DU - Jun 22, 10:55 UTCJun 22, 11:19 UTC25m
2026-06-22 N545DU - Jun 22, 01:44 UTCJun 22, 01:55 UTC10m
2026-06-22 N545DU - Jun 22, 00:29 UTCJun 22, 00:50 UTC20m
2026-06-21 N545DU - Jun 21, 23:30 UTCJun 21, 23:50 UTC20m
2026-06-21 N545DU - Jun 21, 22:04 UTCJun 21, 22:15 UTC10m
2026-06-21 N545DU - Jun 21, 21:14 UTCJun 21, 21:24 UTC10m
2026-06-21 N545DU - Jun 21, 19:45 UTCJun 21, 19:55 UTC10m
2026-06-21 N545DU - Jun 21, 19:05 UTCJun 21, 19:14 UTC10m
2026-06-21 N545DU - Jun 21, 00:40 UTCJun 21, 01:59 UTC1h 20m
2026-06-20 N545DU - Jun 20, 22:59 UTCJun 20, 23:10 UTC10m
2026-06-20 N545DU - Jun 20, 22:05 UTCJun 20, 22:14 UTC10m
2026-06-20 N545DU - Jun 20, 20:49 UTCJun 20, 21:00 UTC10m
2026-06-20 N545DU - Jun 20, 19:15 UTCJun 20, 20:09 UTC55m
2026-06-20 N545DU - Jun 20, 04:59 UTCJun 20, 05:14 UTC15m
2026-06-20 N545DU - Jun 20, 00:39 UTCJun 20, 00:59 UTC20m
2026-06-19 N545DU - Jun 19, 19:29 UTCJun 19, 19:39 UTC10m
2026-06-19 N545DU - Jun 19, 17:49 UTCJun 19, 18:05 UTC15m
2026-06-17 N545DU - Jun 17, 19:50 UTCJun 17, 20:00 UTC10m
2026-06-17 N545DU - Jun 17, 18:50 UTCJun 17, 19:00 UTC10m
2026-06-16 N545DU - Jun 16, 22:10 UTCJun 16, 22:20 UTC10m
2026-06-16 N545DU - Jun 16, 17:30 UTCJun 16, 17:40 UTC10m
2026-06-16 N545DU - Jun 16, 10:00 UTCJun 16, 10:15 UTC15m
2026-06-16 N545DU - Jun 16, 08:10 UTCJun 16, 09:15 UTC1h 5m
2026-06-15 N545DU - Jun 15, 23:25 UTCJun 15, 23:35 UTC10m
2026-06-15 N545DU - Jun 15, 21:35 UTCJun 15, 22:40 UTC1h 5m
2026-06-13 N545DU - Jun 13, 21:05 UTCJun 13, 21:20 UTC15m
2026-06-13 N545DU - Jun 13, 20:00 UTCJun 13, 20:10 UTC10m
2026-06-13 N545DU - Jun 13, 19:10 UTCJun 13, 19:25 UTC15m
2026-06-13 N545DU - Jun 13, 16:25 UTCJun 13, 16:35 UTC10m
2026-06-12 N545DU - Jun 12, 20:10 UTCJun 12, 20:20 UTC10m
2026-06-12 N545DU - Jun 12, 18:15 UTCJun 12, 18:25 UTC10m
2026-06-12 N545DU - Jun 12, 17:20 UTCJun 12, 17:30 UTC10m
2026-06-12 N545DU - Jun 12, 07:00 UTCJun 12, 07:10 UTC10m
2026-06-12 N545DU - Jun 12, 04:55 UTCJun 12, 06:05 UTC1h 10m
2026-06-12 N545DU - Jun 12, 03:50 UTCJun 12, 04:00 UTC10m
2026-06-12 N545DU - Jun 12, 02:40 UTCJun 12, 02:50 UTC10m
2026-06-12 N545DU - Jun 12, 01:50 UTCJun 12, 02:00 UTC10m
2026-06-12 N545DU - Jun 12, 00:45 UTCJun 12, 00:55 UTC10m
2026-06-11 N545DU - Jun 11, 14:15 UTCJun 11, 14:35 UTC20m
2026-06-08 N545DU - Jun 8, 02:10 UTCJun 8, 03:05 UTC55m
2026-06-06 N545DU - Jun 6, 14:20 UTCJun 6, 14:34 UTC15m
2026-06-06 N545DU - Jun 6, 02:25 UTCJun 6, 02:40 UTC15m
2026-06-06 N545DU - Jun 6, 00:45 UTCJun 6, 01:40 UTC55m
2026-06-05 N545DU - Jun 5, 21:15 UTCJun 5, 21:25 UTC10m
2026-06-05 N545DU - Jun 5, 19:20 UTCJun 5, 19:50 UTC30m
2026-06-04 N545DU - Jun 4, 16:50 UTCJun 4, 17:00 UTC10m
2026-06-04 N545DU - Jun 4, 16:00 UTCJun 4, 16:20 UTC20m

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 N545DU page for operator, model, and routing details .

Mode-S A6EADD frequently asked

What is Mode-S code A6EADD?
A6EADD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N545DU.
Where is Mode-S A6EADD registered?
Mode-S code A6EADD 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 A6EADD broadcasting right now?
Yes. Mode-S A6EADD is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6EADD, octal 51565335, decimal 10,939,101.
What flights does A6EADD operate?
Mode-S A6EADD has broadcast 1 distinct callsign, including N545DU.