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sensors Mode-S transponder

A4A08D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N398AM · BELL 407 · operated by AIR METHODS LLC

Hex
A4A08D
Octal
51120215
Decimal
10,789,005
Country
US
Tail
N398AM
Type
B407
No current signal · last broadcast Jul 26, 17:10 UTC
Flights observed
102
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 17:10 UTC

Last known position

Most recent position reported by Mode-S A4A08D.

Country allocation

The ICAO 24-bit address A4A08D 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
N398AM - 102 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N398AM - Jul 26, 17:00 UTCJul 26, 17:10 UTC10m
2026-07-26 N398AM - Jul 26, 15:15 UTCJul 26, 16:10 UTC55m
2026-07-26 N398AM - Jul 26, 09:20 UTCJul 26, 09:40 UTC20m
2026-07-26 N398AM - Jul 26, 08:10 UTCJul 26, 08:30 UTC20m
2026-07-26 N398AM - Jul 26, 07:30 UTCJul 26, 07:40 UTC10m
2026-07-26 N398AM - Jul 26, 03:30 UTCJul 26, 06:00 UTC2h 30m
2026-07-25 N398AM - Jul 25, 07:10 UTCJul 25, 08:20 UTC1h 10m
2026-07-25 N398AM - Jul 25, 06:15 UTCJul 25, 06:30 UTC15m
2026-07-25 N398AM - Jul 25, 04:10 UTCJul 25, 05:20 UTC1h 10m
2026-07-23 N398AM - Jul 23, 22:50 UTCJul 23, 23:05 UTC15m
2026-07-23 N398AM - Jul 23, 21:30 UTCJul 23, 22:20 UTC50m
2026-07-23 N398AM - Jul 23, 19:35 UTCJul 23, 19:45 UTC10m
2026-07-23 N398AM - Jul 23, 17:35 UTCJul 23, 17:55 UTC20m
2026-07-23 N398AM - Jul 23, 15:15 UTCJul 23, 15:25 UTC10m
2026-07-23 N398AM - Jul 23, 14:15 UTCJul 23, 14:25 UTC10m
2026-07-23 N398AM - Jul 23, 12:20 UTCJul 23, 12:40 UTC20m
2026-07-22 N398AM - Jul 22, 21:20 UTCJul 22, 21:30 UTC10m
2026-07-18 N398AM - Jul 18, 20:20 UTCJul 18, 20:35 UTC15m
2026-07-17 N398AM - Jul 17, 16:34 UTCJul 17, 17:20 UTC45m
2026-07-17 N398AM - Jul 17, 08:59 UTCJul 17, 09:10 UTC10m
2026-07-17 N398AM - Jul 17, 08:10 UTCJul 17, 08:20 UTC10m
2026-07-17 N398AM - Jul 17, 07:14 UTCJul 17, 07:30 UTC15m
2026-07-17 N398AM - Jul 17, 02:34 UTCJul 17, 02:45 UTC10m
2026-07-17 N398AM - Jul 17, 01:45 UTCJul 17, 01:59 UTC15m
2026-07-16 N398AM - Jul 16, 20:25 UTCJul 16, 21:25 UTC1h 0m
2026-07-16 N398AM - Jul 16, 16:25 UTCJul 16, 16:35 UTC10m
2026-07-16 N398AM - Jul 16, 14:45 UTCJul 16, 15:05 UTC20m
2026-07-16 N398AM - Jul 16, 13:20 UTCJul 16, 13:40 UTC20m
2026-07-16 N398AM - Jul 16, 06:20 UTCJul 16, 06:50 UTC30m
2026-07-16 N398AM - Jul 16, 05:00 UTCJul 16, 05:30 UTC30m
2026-07-15 N398AM - Jul 15, 16:10 UTCJul 15, 16:20 UTC10m
2026-07-13 N398AM - Jul 13, 16:55 UTCJul 13, 17:40 UTC45m
2026-07-08 N398AM - Jul 8, 17:55 UTCJul 8, 18:15 UTC20m
2026-07-08 N398AM - Jul 8, 07:45 UTCJul 8, 07:55 UTC10m
2026-07-08 N398AM - Jul 8, 02:50 UTCJul 8, 03:00 UTC10m
2026-06-28 N398AM - Jun 28, 08:09 UTCJun 28, 08:34 UTC25m
2026-06-28 N398AM - Jun 28, 06:34 UTCJun 28, 07:25 UTC50m
2026-06-28 N398AM - Jun 28, 05:24 UTCJun 28, 06:00 UTC35m
2026-06-26 N398AM - Jun 26, 23:49 UTCJun 27, 00:00 UTC10m
2026-06-26 N398AM - Jun 26, 17:19 UTCJun 26, 17:35 UTC15m
2026-06-26 N398AM - Jun 26, 00:30 UTCJun 26, 02:30 UTC2h 0m
2026-06-22 N398AM - Jun 22, 21:14 UTCJun 22, 21:45 UTC30m
2026-06-22 N398AM - Jun 22, 17:34 UTCJun 22, 18:30 UTC55m
2026-06-20 N398AM - Jun 20, 02:00 UTCJun 20, 02:14 UTC15m
2026-06-20 N398AM - Jun 20, 01:05 UTCJun 20, 01:14 UTC10m
2026-06-20 N398AM - Jun 20, 00:04 UTCJun 20, 00:14 UTC10m
2026-06-19 N398AM - Jun 19, 23:04 UTCJun 19, 23:14 UTC10m
2026-06-19 N398AM - Jun 19, 22:30 UTCJun 19, 22:34 UTC5m
2026-06-19 N398AM - Jun 19, 19:19 UTCJun 19, 19:25 UTC5m
2026-06-18 N398AM - Jun 18, 15:25 UTCJun 18, 16:20 UTC55m

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 N398AM page for operator, model, and routing details .

Mode-S A4A08D frequently asked

What is Mode-S code A4A08D?
A4A08D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N398AM.
Where is Mode-S A4A08D registered?
Mode-S code A4A08D 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 A4A08D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A4A08D, octal 51120215, decimal 10,789,005.
What flights does A4A08D operate?
Mode-S A4A08D has broadcast 1 distinct callsign, including N398AM.