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sensors Mode-S transponder

A6DF11

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N54178 · AEROSPATIALE AS-350 Ecureuil · operated by AIR METHODS LLC

Hex
A6DF11
Octal
51557421
Decimal
10,936,081
Country
US
Tail
N54178
Type
AS50
No current signal · last broadcast Jul 26, 16:10 UTC
Flights observed
140
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 16:10 UTC

Last known position

Most recent position reported by Mode-S A6DF11.

Country allocation

The ICAO 24-bit address A6DF11 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
AIRLIFE1 - 140 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AIRLIFE1 - Jul 26, 16:00 UTCJul 26, 16:10 UTC10m
2026-07-26 AIRLIFE1 - Jul 26, 14:55 UTCJul 26, 15:20 UTC25m
2026-07-26 AIRLIFE1 - Jul 26, 14:10 UTCJul 26, 14:20 UTC10m
2026-07-25 AIRLIFE1 - Jul 25, 02:25 UTCJul 25, 02:50 UTC25m
2026-07-23 AIRLIFE1 - Jul 23, 02:25 UTCJul 23, 02:35 UTC10m
2026-07-21 AIRLIFE1 - Jul 21, 01:05 UTCJul 21, 02:30 UTC1h 25m
2026-07-20 AIRLIFE1 - Jul 20, 16:10 UTCJul 20, 16:30 UTC20m
2026-07-19 AIRLIFE1 - Jul 19, 18:00 UTCJul 19, 18:40 UTC40m
2026-07-19 AIRLIFE1 - Jul 19, 07:20 UTCJul 19, 08:10 UTC50m
2026-07-19 AIRLIFE1 - Jul 19, 02:05 UTCJul 19, 02:45 UTC40m
2026-07-18 AIRLIFE1 - Jul 18, 04:20 UTCJul 18, 04:45 UTC25m
2026-07-18 AIRLIFE1 - Jul 18, 02:40 UTCJul 18, 03:45 UTC1h 6m
2026-07-15 AIRLIFE1 - Jul 15, 08:40 UTCJul 15, 08:50 UTC10m
2026-07-15 AIRLIFE1 - Jul 15, 07:40 UTCJul 15, 08:05 UTC25m
2026-07-15 AIRLIFE1 - Jul 15, 06:55 UTCJul 15, 07:10 UTC15m
2026-07-15 AIRLIFE1 - Jul 15, 01:15 UTCJul 15, 01:35 UTC20m
2026-07-13 AIRLIFE1 - Jul 13, 02:30 UTCJul 13, 02:40 UTC10m
2026-07-13 AIRLIFE1 - Jul 13, 01:30 UTCJul 13, 01:40 UTC10m
2026-07-12 AIRLIFE1 - Jul 12, 07:25 UTCJul 12, 07:40 UTC15m
2026-07-12 AIRLIFE1 - Jul 12, 06:35 UTCJul 12, 06:50 UTC15m
2026-07-11 AIRLIFE1 - Jul 11, 16:45 UTCJul 11, 18:15 UTC1h 30m
2026-07-11 AIRLIFE1 - Jul 11, 05:15 UTCJul 11, 05:45 UTC30m
2026-07-11 AIRLIFE1 - Jul 11, 03:35 UTCJul 11, 04:35 UTC1h 0m
2026-07-11 AIRLIFE1 - Jul 11, 02:40 UTCJul 11, 02:50 UTC10m
2026-07-10 AIRLIFE1 - Jul 10, 18:40 UTCJul 10, 18:50 UTC10m
2026-07-10 AIRLIFE1 - Jul 10, 17:35 UTCJul 10, 17:45 UTC10m
2026-07-08 AIRLIFE1 - Jul 8, 00:55 UTCJul 8, 01:05 UTC10m
2026-07-08 AIRLIFE1 - Jul 8, 00:10 UTCJul 8, 00:20 UTC10m
2026-07-07 AIRLIFE1 - Jul 7, 15:25 UTCJul 7, 15:55 UTC30m
2026-07-05 AIRLIFE1 - Jul 5, 23:35 UTCJul 5, 23:50 UTC15m
2026-07-05 AIRLIFE1 - Jul 5, 16:25 UTCJul 5, 16:35 UTC10m
2026-07-03 AIRLIFE1 - Jul 3, 12:25 UTCJul 3, 12:35 UTC10m
2026-07-03 AIRLIFE1 - Jul 3, 11:30 UTCJul 3, 11:45 UTC15m
2026-07-03 AIRLIFE1 - Jul 3, 00:55 UTCJul 3, 01:10 UTC15m
2026-07-02 AIRLIFE1 - Jul 2, 17:10 UTCJul 2, 19:25 UTC2h 15m
2026-06-30 AIRLIFE1 - Jun 30, 19:20 UTCJun 30, 20:05 UTC45m
2026-06-30 AIRLIFE1 - Jun 30, 02:35 UTCJun 30, 02:50 UTC15m
2026-06-30 AIRLIFE1 - Jun 30, 01:50 UTCJun 30, 02:00 UTC10m
2026-06-29 AIRLIFE1 - Jun 29, 21:30 UTCJun 29, 21:39 UTC10m
2026-06-29 AIRLIFE1 - Jun 29, 20:35 UTCJun 29, 20:44 UTC10m
2026-06-28 AIRLIFE1 - Jun 28, 19:29 UTCJun 28, 19:59 UTC30m
2026-06-28 AIRLIFE1 - Jun 28, 18:25 UTCJun 28, 18:44 UTC20m
2026-06-26 AIRLIFE1 - Jun 26, 21:45 UTCJun 26, 21:55 UTC10m
2026-06-26 AIRLIFE1 - Jun 26, 20:29 UTCJun 26, 20:44 UTC15m
2026-06-25 AIRLIFE1 - Jun 25, 23:05 UTCJun 25, 23:19 UTC15m
2026-06-25 AIRLIFE1 - Jun 25, 12:54 UTCJun 25, 13:20 UTC25m
2026-06-25 AIRLIFE1 - Jun 25, 10:25 UTCJun 25, 12:04 UTC1h 40m
2026-06-24 AIRLIFE1 - Jun 24, 19:44 UTCJun 24, 21:09 UTC1h 25m
2026-06-24 AIRLIFE1 - Jun 24, 05:49 UTCJun 24, 07:20 UTC1h 30m
2026-06-24 AIRLIFE1 - Jun 24, 00:15 UTCJun 24, 00:30 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 N54178 page for operator, model, and routing details .

Mode-S A6DF11 frequently asked

What is Mode-S code A6DF11?
A6DF11 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N54178.
Where is Mode-S A6DF11 registered?
Mode-S code A6DF11 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 A6DF11 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 16:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6DF11, octal 51557421, decimal 10,936,081.
What flights does A6DF11 operate?
Mode-S A6DF11 has broadcast 1 distinct callsign, including AIRLIFE1.