Apparatus

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sensors Mode-S transponder

A5A412

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4625B · CESSNA 208 Caravan · operated by MARTINAIRE AVIATION LLC

Hex
A5A412
Octal
51322022
Decimal
10,855,442
Country
US
Tail
N4625B
Type
C208
No current signal · last broadcast 7h ago
Flights observed
129
Distinct callsigns
5
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A5A412.

Country allocation

The ICAO 24-bit address A5A412 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 5 distinct

Callsign Airline Flights Last seen
MRA643 - 109 2026-06-27
MRA648 - 8 2026-07-17
MRA662 - 6 2026-07-14
MRA210 - 3 2026-07-11
MRA208 - 3 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 MRA208 - Jul 18, 00:45 UTCJul 18, 01:39 UTC55m
2026-07-17 MRA208 - Jul 17, 20:20 UTCJul 17, 20:35 UTC15m
2026-07-17 MRA208 - Jul 17, 18:44 UTCJul 17, 19:30 UTC45m
2026-07-17 MRA648 - Jul 17, 13:45 UTCJul 17, 14:24 UTC40m
2026-07-17 MRA648 - Jul 17, 12:15 UTCJul 17, 12:50 UTC35m
2026-07-17 MRA648 - Jul 17, 01:09 UTCJul 17, 01:55 UTC45m
2026-07-17 MRA648 - Jul 17, 00:20 UTCJul 17, 00:35 UTC15m
2026-07-16 MRA648 - Jul 16, 13:15 UTCJul 16, 14:00 UTC45m
2026-07-16 MRA648 - Jul 16, 01:30 UTCJul 16, 02:10 UTC40m
2026-07-16 MRA648 - Jul 16, 00:35 UTCJul 16, 00:45 UTC10m
2026-07-15 MRA648 - Jul 15, 21:15 UTCJul 15, 21:55 UTC40m
2026-07-14 MRA662 - Jul 14, 14:45 UTCJul 14, 15:25 UTC40m
2026-07-14 MRA662 - Jul 14, 12:20 UTCJul 14, 12:45 UTC25m
2026-07-14 MRA662 - Jul 14, 10:45 UTCJul 14, 11:00 UTC15m
2026-07-11 MRA210 - Jul 11, 13:55 UTCJul 11, 14:05 UTC10m
2026-07-11 MRA210 - Jul 11, 02:45 UTCJul 11, 03:15 UTC30m
2026-07-10 MRA210 - Jul 10, 23:10 UTCJul 10, 23:35 UTC25m
2026-06-30 MRA662 - Jun 30, 15:25 UTCJun 30, 16:10 UTC45m
2026-06-30 MRA662 - Jun 30, 12:55 UTCJun 30, 13:35 UTC40m
2026-06-30 MRA662 - Jun 30, 10:45 UTCJun 30, 11:10 UTC25m
2026-06-27 MRA643 - Jun 27, 16:39 UTCJun 27, 17:25 UTC45m
2026-06-27 MRA643 - Jun 27, 13:04 UTCJun 27, 13:40 UTC35m
2026-06-27 MRA643 - Jun 27, 01:39 UTCJun 27, 02:09 UTC30m
2026-06-26 MRA643 - Jun 26, 11:55 UTCJun 26, 12:34 UTC40m
2026-06-26 MRA643 - Jun 26, 00:59 UTCJun 26, 01:45 UTC45m
2026-06-25 MRA643 - Jun 25, 12:10 UTCJun 25, 12:54 UTC45m
2026-06-25 MRA643 - Jun 25, 01:14 UTCJun 25, 01:54 UTC40m
2026-06-24 MRA643 - Jun 24, 13:05 UTCJun 24, 13:50 UTC45m
2026-06-24 MRA643 - Jun 24, 00:59 UTCJun 24, 01:44 UTC45m
2026-06-23 MRA643 - Jun 23, 12:25 UTCJun 23, 13:09 UTC45m
2026-06-23 MRA643 - Jun 23, 01:00 UTCJun 23, 01:45 UTC45m
2026-06-20 MRA643 - Jun 20, 13:44 UTCJun 20, 14:14 UTC30m
2026-06-20 MRA643 - Jun 20, 01:29 UTCJun 20, 01:55 UTC25m
2026-06-19 MRA643 - Jun 19, 22:14 UTCJun 19, 22:55 UTC40m
2026-06-19 MRA643 - Jun 19, 00:59 UTCJun 19, 01:39 UTC40m
2026-06-18 MRA643 - Jun 18, 12:15 UTCJun 18, 13:05 UTC50m
2026-06-18 MRA643 - Jun 18, 00:45 UTCJun 18, 01:30 UTC45m
2026-06-17 MRA643 - Jun 17, 12:45 UTCJun 17, 13:50 UTC1h 5m
2026-06-17 MRA643 - Jun 17, 00:55 UTCJun 17, 01:35 UTC40m
2026-06-16 MRA643 - Jun 16, 12:25 UTCJun 16, 13:09 UTC45m
2026-06-16 MRA643 - Jun 16, 00:50 UTCJun 16, 01:30 UTC40m
2026-06-13 MRA643 - Jun 13, 12:45 UTCJun 13, 13:10 UTC25m
2026-06-13 MRA643 - Jun 13, 01:20 UTCJun 13, 01:45 UTC25m
2026-06-12 MRA643 - Jun 12, 12:45 UTCJun 12, 13:25 UTC40m
2026-06-12 MRA643 - Jun 12, 01:10 UTCJun 12, 01:50 UTC40m
2026-06-11 MRA643 - Jun 11, 12:30 UTCJun 11, 13:05 UTC35m
2026-06-11 MRA643 - Jun 11, 01:05 UTCJun 11, 01:45 UTC40m
2026-06-10 MRA643 - Jun 10, 12:40 UTCJun 10, 13:20 UTC40m
2026-06-10 MRA643 - Jun 10, 01:00 UTCJun 10, 01:40 UTC40m
2026-06-09 MRA643 - Jun 9, 12:40 UTCJun 9, 13:20 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 N4625B page for operator, model, and routing details .

Mode-S A5A412 frequently asked

What is Mode-S code A5A412?
A5A412 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4625B.
Where is Mode-S A5A412 registered?
Mode-S code A5A412 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 A5A412 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5A412, octal 51322022, decimal 10,855,442.
What flights does A5A412 operate?
Mode-S A5A412 has broadcast 5 distinct callsigns, including MRA643, MRA648, MRA662, MRA210, MRA208.