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sensors Mode-S transponder

A6EB66

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N545KF · AIRBUS HELICOPTERS EC-145 · operated by AIR METHODS LLC

Hex
A6EB66
Octal
51565546
Decimal
10,939,238
Country
US
Tail
N545KF
Type
EC45
No current signal · last broadcast Jul 26, 07:40 UTC
Flights observed
113
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 07:40 UTC

Last known position

Most recent position reported by Mode-S A6EB66.

Country allocation

The ICAO 24-bit address A6EB66 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
N545KF - 113 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N545KF - Jul 26, 06:15 UTCJul 26, 07:40 UTC1h 26m
2026-07-25 N545KF - Jul 25, 18:50 UTCJul 25, 19:10 UTC20m
2026-07-25 N545KF - Jul 25, 16:35 UTCJul 25, 16:50 UTC15m
2026-07-24 N545KF - Jul 24, 02:00 UTCJul 24, 02:30 UTC30m
2026-07-23 N545KF - Jul 23, 23:55 UTCJul 24, 00:15 UTC20m
2026-07-23 N545KF - Jul 23, 20:50 UTCJul 23, 21:20 UTC30m
2026-07-23 N545KF - Jul 23, 18:30 UTCJul 23, 18:55 UTC25m
2026-07-22 N545KF - Jul 22, 05:10 UTCJul 22, 05:25 UTC15m
2026-07-22 N545KF - Jul 22, 02:40 UTCJul 22, 03:05 UTC25m
2026-07-21 N545KF - Jul 21, 20:00 UTCJul 21, 20:20 UTC20m
2026-07-20 N545KF - Jul 20, 03:45 UTCJul 20, 04:05 UTC20m
2026-07-20 N545KF - Jul 20, 02:15 UTCJul 20, 02:35 UTC20m
2026-07-18 N545KF - Jul 18, 18:50 UTCJul 18, 19:15 UTC25m
2026-07-17 N545KF - Jul 17, 23:50 UTCJul 18, 00:25 UTC35m
2026-07-17 N545KF - Jul 17, 22:35 UTCJul 17, 23:05 UTC30m
2026-07-15 N545KF - Jul 15, 19:10 UTCJul 15, 19:40 UTC30m
2026-07-15 N545KF - Jul 15, 16:05 UTCJul 15, 16:45 UTC40m
2026-07-14 N545KF - Jul 14, 16:10 UTCJul 14, 16:35 UTC25m
2026-07-14 N545KF - Jul 14, 14:10 UTCJul 14, 14:45 UTC35m
2026-07-13 N545KF - Jul 13, 23:00 UTCJul 13, 23:15 UTC15m
2026-07-13 N545KF - Jul 13, 20:20 UTCJul 13, 20:45 UTC25m
2026-07-13 N545KF - Jul 13, 17:00 UTCJul 13, 17:25 UTC25m
2026-07-13 N545KF - Jul 13, 14:45 UTCJul 13, 15:15 UTC30m
2026-07-12 N545KF - Jul 12, 19:35 UTCJul 12, 20:15 UTC40m
2026-07-12 N545KF - Jul 12, 16:25 UTCJul 12, 17:01 UTC35m
2026-07-09 N545KF - Jul 9, 04:40 UTCJul 9, 05:00 UTC20m
2026-07-09 N545KF - Jul 9, 02:55 UTCJul 9, 03:05 UTC10m
2026-07-07 N545KF - Jul 7, 23:40 UTCJul 8, 00:05 UTC25m
2026-07-07 N545KF - Jul 7, 22:05 UTCJul 7, 22:30 UTC25m
2026-07-07 N545KF - Jul 7, 19:15 UTCJul 7, 19:40 UTC25m
2026-07-07 N545KF - Jul 7, 17:15 UTCJul 7, 17:40 UTC25m
2026-07-07 N545KF - Jul 7, 13:45 UTCJul 7, 13:55 UTC10m
2026-07-07 N545KF - Jul 7, 11:45 UTCJul 7, 12:10 UTC25m
2026-07-05 N545KF - Jul 5, 08:40 UTCJul 5, 08:50 UTC10m
2026-07-04 N545KF - Jul 4, 01:35 UTCJul 4, 01:50 UTC15m
2026-07-03 N545KF - Jul 3, 02:55 UTCJul 3, 03:40 UTC45m
2026-07-03 N545KF - Jul 3, 00:35 UTCJul 3, 00:50 UTC15m
2026-07-02 N545KF - Jul 2, 14:45 UTCJul 2, 14:55 UTC10m
2026-07-02 N545KF - Jul 2, 07:40 UTCJul 2, 08:20 UTC40m
2026-07-02 N545KF - Jul 2, 06:00 UTCJul 2, 06:51 UTC51m
2026-07-01 N545KF - Jul 1, 18:30 UTCJul 1, 19:10 UTC40m
2026-07-01 N545KF - Jul 1, 17:05 UTCJul 1, 17:40 UTC35m
2026-06-28 N545KF - Jun 28, 20:09 UTCJun 28, 20:29 UTC20m
2026-06-28 N545KF - Jun 28, 18:55 UTCJun 28, 19:14 UTC20m
2026-06-28 N545KF - Jun 28, 10:15 UTCJun 28, 10:24 UTC10m
2026-06-28 N545KF - Jun 28, 08:39 UTCJun 28, 08:50 UTC10m
2026-06-24 N545KF - Jun 24, 14:55 UTCJun 24, 15:35 UTC40m
2026-06-23 N545KF - Jun 23, 04:14 UTCJun 23, 04:35 UTC20m
2026-06-23 N545KF - Jun 23, 02:20 UTCJun 23, 02:40 UTC20m
2026-06-21 N545KF - Jun 21, 06:24 UTCJun 21, 07:04 UTC40m

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 N545KF page for operator, model, and routing details .

Mode-S A6EB66 frequently asked

What is Mode-S code A6EB66?
A6EB66 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N545KF.
Where is Mode-S A6EB66 registered?
Mode-S code A6EB66 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 A6EB66 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 07:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6EB66, octal 51565546, decimal 10,939,238.
What flights does A6EB66 operate?
Mode-S A6EB66 has broadcast 1 distinct callsign, including N545KF.