Apparatus

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sensors Mode-S transponder

A472AB

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N386MD · AGUSTA AW-139 · operated by MARYLAND STATE POLICE AVIATION COMMAND

Hex
A472AB
Octal
51071253
Decimal
10,777,259
Country
US
Tail
N386MD
Type
A139
No current signal · last broadcast 16h ago
Flights observed
123
Distinct callsigns
4
Country
US
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S A472AB.

Country allocation

The ICAO 24-bit address A472AB 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 4 distinct

Callsign Airline Flights Last seen
TRP1 - 87 2026-06-30
TRP4 - 29 2026-07-13
TRP17 - 6 2026-05-12
N386MD - 1 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 TRP4 - Jul 13, 15:35 UTCJul 13, 15:45 UTC10m
2026-07-13 TRP4 - Jul 13, 15:05 UTCJul 13, 15:15 UTC10m
2026-07-13 TRP4 - Jul 13, 12:55 UTCJul 13, 13:05 UTC10m
2026-07-13 TRP4 - Jul 13, 11:05 UTCJul 13, 11:15 UTC10m
2026-07-13 TRP4 - Jul 13, 04:35 UTCJul 13, 05:20 UTC45m
2026-07-13 TRP4 - Jul 13, 04:00 UTCJul 13, 04:20 UTC20m
2026-07-13 TRP4 - Jul 13, 01:25 UTCJul 13, 02:30 UTC1h 5m
2026-07-13 TRP4 - Jul 13, 00:01 UTCJul 13, 00:20 UTC20m
2026-07-12 TRP4 - Jul 12, 23:10 UTCJul 12, 23:25 UTC15m
2026-07-12 TRP4 - Jul 12, 22:35 UTCJul 12, 22:55 UTC20m
2026-07-12 TRP4 - Jul 12, 21:05 UTCJul 12, 21:45 UTC40m
2026-07-12 TRP4 - Jul 12, 00:15 UTCJul 12, 00:55 UTC40m
2026-07-11 TRP4 - Jul 11, 23:55 UTCJul 12, 00:10 UTC15m
2026-07-10 TRP4 - Jul 10, 16:25 UTCJul 10, 16:40 UTC15m
2026-07-10 TRP4 - Jul 10, 15:45 UTCJul 10, 16:20 UTC35m
2026-07-09 TRP4 - Jul 9, 03:25 UTCJul 9, 03:55 UTC30m
2026-07-09 TRP4 - Jul 9, 02:40 UTCJul 9, 03:05 UTC25m
2026-07-08 TRP4 - Jul 8, 17:55 UTCJul 8, 19:45 UTC1h 50m
2026-07-08 TRP4 - Jul 8, 01:30 UTCJul 8, 02:05 UTC35m
2026-07-07 TRP4 - Jul 7, 18:30 UTCJul 7, 19:55 UTC1h 25m
2026-07-07 TRP4 - Jul 7, 17:20 UTCJul 7, 18:20 UTC1h 0m
2026-07-07 TRP4 - Jul 7, 16:25 UTCJul 7, 17:15 UTC50m
2026-07-04 TRP4 - Jul 4, 22:05 UTCJul 4, 23:05 UTC1h 0m
2026-07-04 TRP4 - Jul 4, 15:35 UTCJul 4, 17:15 UTC1h 40m
2026-07-04 TRP4 - Jul 4, 07:40 UTCJul 4, 08:10 UTC30m
2026-07-04 TRP4 - Jul 4, 00:35 UTCJul 4, 01:15 UTC40m
2026-07-03 TRP4 - Jul 3, 23:20 UTCJul 4, 00:15 UTC55m
2026-07-03 TRP4 - Jul 3, 06:05 UTCJul 3, 06:50 UTC45m
2026-07-02 TRP4 - Jul 2, 15:25 UTCJul 2, 16:10 UTC45m
2026-06-30 TRP1 - Jun 30, 21:55 UTCJun 30, 22:55 UTC1h 0m
2026-06-30 TRP1 - Jun 30, 15:35 UTCJun 30, 16:50 UTC1h 15m
2026-06-29 TRP1 - Jun 29, 21:09 UTCJun 29, 22:24 UTC1h 15m
2026-06-29 TRP1 - Jun 29, 16:35 UTCJun 29, 17:05 UTC30m
2026-06-29 TRP1 - Jun 29, 13:34 UTCJun 29, 14:44 UTC1h 10m
2026-06-29 TRP1 - Jun 29, 01:55 UTCJun 29, 03:14 UTC1h 20m
2026-06-27 TRP1 - Jun 27, 01:35 UTCJun 27, 02:39 UTC1h 5m
2026-06-26 TRP1 MTN → MTN Jun 26, 23:49 UTCJun 27, 00:55 UTC1h 5m
2026-06-26 TRP1 - Jun 26, 21:59 UTCJun 26, 22:49 UTC50m
2026-06-25 TRP1 - Jun 25, 15:50 UTCJun 25, 16:20 UTC30m
2026-06-25 TRP1 MTN → MTN Jun 25, 01:04 UTCJun 25, 01:30 UTC25m
2026-06-24 TRP1 - Jun 24, 03:35 UTCJun 24, 04:50 UTC1h 15m
2026-06-21 TRP1 - Jun 21, 07:29 UTCJun 21, 08:10 UTC40m
2026-06-21 TRP1 - Jun 21, 02:24 UTCJun 21, 03:44 UTC1h 20m
2026-06-20 TRP1 - Jun 20, 00:44 UTCJun 20, 01:29 UTC45m
2026-06-19 TRP1 - Jun 19, 21:59 UTCJun 19, 22:55 UTC55m
2026-06-19 TRP1 - Jun 19, 19:34 UTCJun 19, 19:54 UTC20m
2026-06-19 TRP1 - Jun 19, 18:20 UTCJun 19, 18:59 UTC40m
2026-06-19 TRP1 MTN → MTN Jun 19, 12:39 UTCJun 19, 14:15 UTC1h 35m
2026-06-19 TRP1 - Jun 19, 06:04 UTCJun 19, 08:20 UTC2h 15m
2026-06-18 TRP1 - Jun 18, 13:05 UTCJun 18, 13:15 UTC10m

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 N386MD page for operator, model, and routing details .

Mode-S A472AB frequently asked

What is Mode-S code A472AB?
A472AB is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N386MD.
Where is Mode-S A472AB registered?
Mode-S code A472AB 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 A472AB broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A472AB, octal 51071253, decimal 10,777,259.
What flights does A472AB operate?
Mode-S A472AB has broadcast 4 distinct callsigns, including TRP1, TRP4, TRP17, N386MD.