Apparatus

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sensors Mode-S transponder

A594AA

ICAO 24-bit transponder address · allocated to United States

Hex
A594AA
Octal
51312252
Decimal
10,851,498
Country
US
No current signal · last broadcast 13h ago
Flights observed
55
Distinct callsigns
1
Country
US
Last broadcast
13h ago

Last known position

Most recent position reported by Mode-S A594AA.

Country allocation

The ICAO 24-bit address A594AA 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
N459MM - 55 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N459MM - Jul 13, 17:20 UTCJul 13, 17:40 UTC20m
2026-07-13 N459MM - Jul 13, 15:30 UTCJul 13, 16:15 UTC45m
2026-07-13 N459MM - Jul 13, 13:00 UTCJul 13, 13:35 UTC35m
2026-07-11 N459MM - Jul 11, 23:40 UTCJul 12, 00:15 UTC35m
2026-07-11 N459MM HYA → MJX Jul 11, 14:45 UTCJul 11, 17:10 UTC2h 25m
2026-07-11 N459MM - Jul 11, 11:20 UTCJul 11, 14:05 UTC2h 45m
2026-07-10 N459MM - Jul 10, 18:40 UTCJul 10, 19:00 UTC20m
2026-07-10 N459MM - Jul 10, 16:50 UTCJul 10, 17:10 UTC20m
2026-07-10 N459MM - Jul 10, 14:10 UTCJul 10, 15:35 UTC1h 25m
2026-07-09 N459MM - Jul 9, 22:20 UTCJul 9, 23:05 UTC45m
2026-07-09 N459MM - Jul 9, 20:35 UTCJul 9, 20:50 UTC15m
2026-07-09 N459MM - Jul 9, 18:05 UTCJul 9, 19:00 UTC55m
2026-07-09 N459MM - Jul 9, 15:55 UTCJul 9, 16:30 UTC35m
2026-07-05 N459MM - Jul 5, 14:20 UTCJul 5, 14:40 UTC20m
2026-07-04 N459MM - Jul 4, 19:30 UTCJul 4, 20:20 UTC50m
2026-07-04 N459MM - Jul 4, 13:30 UTCJul 4, 14:05 UTC35m
2026-07-04 N459MM - Jul 4, 12:10 UTCJul 4, 12:30 UTC20m
2026-07-04 N459MM - Jul 4, 11:40 UTCJul 4, 12:00 UTC20m
2026-07-03 N459MM - Jul 3, 15:15 UTCJul 3, 15:35 UTC20m
2026-07-02 N459MM - Jul 2, 15:10 UTCJul 2, 16:25 UTC1h 15m
2026-07-02 N459MM - Jul 2, 13:45 UTCJul 2, 14:25 UTC40m
2026-07-02 N459MM - Jul 2, 12:05 UTCJul 2, 12:50 UTC45m
2026-07-01 N459MM - Jul 1, 22:10 UTCJul 1, 22:45 UTC35m
2026-06-30 N459MM - Jun 30, 22:00 UTCJun 30, 22:50 UTC50m
2026-06-30 N459MM - Jun 30, 19:10 UTCJun 30, 20:00 UTC50m
2026-06-30 N459MM - Jun 30, 13:55 UTCJun 30, 16:00 UTC2h 5m
2026-06-29 N459MM - Jun 29, 23:05 UTCJun 29, 23:34 UTC30m
2026-06-29 N459MM - Jun 29, 18:30 UTCJun 29, 20:35 UTC2h 5m
2026-06-29 N459MM - Jun 29, 15:19 UTCJun 29, 16:10 UTC50m
2026-06-26 N459MM - Jun 26, 22:40 UTCJun 26, 22:55 UTC15m
2026-06-26 N459MM - Jun 26, 20:15 UTCJun 26, 20:50 UTC35m
2026-06-26 N459MM - Jun 26, 18:49 UTCJun 26, 19:04 UTC15m
2026-06-26 N459MM - Jun 26, 16:44 UTCJun 26, 17:29 UTC45m
2026-06-25 N459MM - Jun 25, 21:25 UTCJun 25, 21:40 UTC15m
2026-06-25 N459MM - Jun 25, 19:49 UTCJun 25, 19:59 UTC10m
2026-06-25 N459MM - Jun 25, 12:40 UTCJun 25, 13:45 UTC1h 5m
2026-06-24 N459MM - Jun 24, 16:54 UTCJun 24, 18:50 UTC1h 55m
2026-06-24 N459MM - Jun 24, 14:50 UTCJun 24, 16:40 UTC1h 50m
2026-06-22 N459MM OCE → WWD Jun 22, 02:19 UTCJun 22, 02:54 UTC35m
2026-06-22 N459MM - Jun 22, 00:20 UTCJun 22, 00:50 UTC30m
2026-06-21 N459MM - Jun 21, 19:39 UTCJun 21, 20:54 UTC1h 15m
2026-06-20 N459MM - Jun 20, 19:29 UTCJun 20, 20:25 UTC55m
2026-06-19 N459MM - Jun 19, 12:39 UTCJun 19, 14:04 UTC1h 25m
2026-06-17 N459MM - Jun 17, 22:15 UTCJun 18, 04:50 UTC6h 35m
2026-06-17 N459MM - Jun 17, 17:10 UTCJun 17, 19:20 UTC2h 10m
2026-06-17 N459MM - Jun 17, 15:15 UTCJun 17, 16:20 UTC1h 5m
2026-06-17 N459MM - Jun 17, 13:40 UTCJun 17, 13:50 UTC10m
2026-06-17 N459MM - Jun 17, 03:20 UTCJun 17, 04:10 UTC50m
2026-06-17 N459MM - Jun 17, 01:40 UTCJun 17, 02:25 UTC45m
2026-06-16 N459MM - Jun 16, 23:45 UTCJun 17, 00:55 UTC1h 10m

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.

Mode-S A594AA frequently asked

What is Mode-S code A594AA?
A594AA is an ICAO 24-bit transponder address. Allocated to United States.
Where is Mode-S A594AA registered?
Mode-S code A594AA 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 A594AA broadcasting right now?
No active broadcast right now. Last signal was 13h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A594AA, octal 51312252, decimal 10,851,498.
What flights does A594AA operate?
Mode-S A594AA has broadcast 1 distinct callsign, including N459MM.