Apparatus

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sensors Mode-S transponder

A6EF3C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N546LM · BEECH 200 Super King Air · operated by AERO AIR LLC

Hex
A6EF3C
Octal
51567474
Decimal
10,940,220
Country
US
Tail
N546LM
Type
BE20
No current signal · last broadcast 2h ago
Flights observed
134
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A6EF3C.

Country allocation

The ICAO 24-bit address A6EF3C 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
N546LM - 134 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N546LM - Jul 13, 23:00 UTCJul 14, 00:35 UTC1h 35m
2026-07-11 N546LM - Jul 11, 00:50 UTCJul 11, 02:40 UTC1h 50m
2026-07-10 N546LM - Jul 10, 08:25 UTCJul 10, 10:55 UTC2h 30m
2026-07-10 N546LM - Jul 10, 05:10 UTCJul 10, 05:30 UTC20m
2026-07-10 N546LM - Jul 10, 00:45 UTCJul 10, 02:30 UTC1h 45m
2026-07-09 N546LM - Jul 9, 21:25 UTCJul 9, 23:05 UTC1h 40m
2026-07-08 N546LM - Jul 8, 18:50 UTCJul 8, 20:25 UTC1h 35m
2026-07-08 N546LM - Jul 8, 08:50 UTCJul 8, 10:35 UTC1h 45m
2026-07-07 N546LM - Jul 7, 01:00 UTCJul 7, 02:55 UTC1h 55m
2026-07-06 N546LM - Jul 6, 21:20 UTCJul 6, 22:55 UTC1h 35m
2026-07-05 N546LM - Jul 5, 19:10 UTCJul 5, 20:45 UTC1h 35m
2026-07-02 N546LM - Jul 2, 03:10 UTCJul 2, 05:15 UTC2h 5m
2026-07-01 N546LM - Jul 1, 21:30 UTCJul 1, 23:10 UTC1h 40m
2026-06-30 N546LM - Jun 30, 23:00 UTCJul 1, 00:20 UTC1h 20m
2026-06-28 N546LM - Jun 28, 03:14 UTCJun 28, 05:09 UTC1h 55m
2026-06-27 N546LM - Jun 27, 22:15 UTCJun 27, 23:34 UTC1h 20m
2026-06-27 N546LM - Jun 27, 17:49 UTCJun 27, 19:34 UTC1h 45m
2026-06-25 N546LM ANC → ANC Jun 25, 22:39 UTCJun 26, 06:09 UTC7h 30m
2026-06-25 N546LM ANC → ANC Jun 25, 00:09 UTCJun 25, 06:09 UTC6h 0m
2026-06-24 N546LM - Jun 24, 14:00 UTCJun 24, 14:55 UTC55m
2026-06-24 N546LM - Jun 24, 10:55 UTCJun 24, 11:54 UTC1h 0m
2026-06-24 N546LM - Jun 24, 07:44 UTCJun 24, 08:49 UTC1h 5m
2026-06-23 N546LM - Jun 23, 00:00 UTCJun 23, 01:35 UTC1h 35m
2026-06-22 N546LM - Jun 22, 04:00 UTCJun 22, 05:10 UTC1h 10m
2026-06-22 N546LM - Jun 22, 00:44 UTCJun 22, 01:49 UTC1h 5m
2026-06-21 N546LM - Jun 21, 06:04 UTCJun 21, 07:49 UTC1h 45m
2026-06-21 N546LM - Jun 21, 02:04 UTCJun 21, 03:30 UTC1h 25m
2026-06-20 N546LM - Jun 20, 04:49 UTCJun 20, 05:39 UTC50m
2026-06-20 N546LM - Jun 20, 01:19 UTCJun 20, 02:29 UTC1h 10m
2026-06-18 N546LM - Jun 18, 00:45 UTCJun 18, 01:55 UTC1h 10m
2026-06-17 N546LM - Jun 17, 22:15 UTCJun 17, 23:25 UTC1h 10m
2026-06-16 N546LM - Jun 16, 23:30 UTCJun 16, 23:45 UTC15m
2026-06-16 N546LM ANC → MRI Jun 16, 04:30 UTCJun 16, 21:55 UTC17h 26m
2026-06-16 N546LM - Jun 16, 01:15 UTCJun 16, 02:50 UTC1h 35m
2026-06-15 N546LM - Jun 15, 18:20 UTCJun 15, 20:00 UTC1h 40m
2026-06-15 N546LM - Jun 15, 01:50 UTCJun 15, 03:45 UTC1h 55m
2026-06-11 N546LM - Jun 11, 23:30 UTCJun 12, 01:15 UTC1h 45m
2026-06-11 N546LM - Jun 11, 05:05 UTCJun 11, 06:45 UTC1h 40m
2026-06-10 N546LM - Jun 10, 22:50 UTCJun 11, 00:25 UTC1h 35m
2026-06-08 N546LM VDZ → ANC Jun 8, 23:40 UTCJun 9, 00:15 UTC35m
2026-06-08 N546LM ANC → VDZ Jun 8, 22:20 UTCJun 8, 22:55 UTC35m
2026-06-08 N546LM - Jun 8, 12:25 UTCJun 8, 13:00 UTC35m
2026-06-08 N546LM - Jun 8, 09:05 UTCJun 8, 10:15 UTC1h 10m
2026-06-07 N546LM ANC → ANC Jun 7, 22:05 UTCJun 8, 04:15 UTC6h 10m
2026-06-07 N546LM - Jun 7, 06:20 UTCJun 7, 07:00 UTC40m
2026-06-07 N546LM - Jun 7, 04:20 UTCJun 7, 04:50 UTC30m
2026-06-06 N546LM FAI → ANC Jun 6, 06:35 UTCJun 6, 07:50 UTC1h 15m
2026-06-06 N546LM - Jun 6, 02:25 UTCJun 6, 03:20 UTC55m
2026-06-05 N546LM - Jun 5, 19:15 UTCJun 5, 20:05 UTC50m
2026-06-05 N546LM - Jun 5, 16:10 UTCJun 5, 17:20 UTC1h 10m

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 N546LM page for operator, model, and routing details .

Mode-S A6EF3C frequently asked

What is Mode-S code A6EF3C?
A6EF3C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N546LM.
Where is Mode-S A6EF3C registered?
Mode-S code A6EF3C 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 A6EF3C broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6EF3C, octal 51567474, decimal 10,940,220.
What flights does A6EF3C operate?
Mode-S A6EF3C has broadcast 1 distinct callsign, including N546LM.