Apparatus

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sensors Mode-S transponder

A1A6D5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N205Z · operated by ALPHA TANGO AIRCRAFT LLC

Hex
A1A6D5
Octal
50323325
Decimal
10,594,005
Country
US
Tail
N205Z
Type
P28A
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
139
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S A1A6D5.

Country allocation

The ICAO 24-bit address A1A6D5 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
CXK558 - 139 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CXK558 - Jul 26, 20:35 UTCJul 26, 21:15 UTC40m
2026-07-26 CXK558 - Jul 26, 18:05 UTCJul 26, 19:30 UTC1h 25m
2026-07-26 CXK558 - Jul 26, 12:20 UTCJul 26, 13:55 UTC1h 35m
2026-07-24 CXK558 - Jul 24, 19:05 UTCJul 24, 20:25 UTC1h 20m
2026-07-24 CXK558 - Jul 24, 16:40 UTCJul 24, 17:35 UTC55m
2026-07-24 CXK558 - Jul 24, 16:15 UTCJul 24, 16:30 UTC15m
2026-07-24 CXK558 LNS → RDG Jul 24, 15:40 UTCJul 24, 16:05 UTC25m
2026-07-24 CXK558 LNS → LNS Jul 24, 14:20 UTCJul 24, 14:35 UTC15m
2026-07-24 CXK558 - Jul 24, 13:15 UTCJul 24, 14:15 UTC1h 0m
2026-07-24 CXK558 - Jul 24, 10:05 UTCJul 24, 10:45 UTC40m
2026-07-23 CXK558 - Jul 23, 23:30 UTCJul 24, 01:15 UTC1h 45m
2026-07-23 CXK558 - Jul 23, 20:15 UTCJul 23, 21:45 UTC1h 30m
2026-07-23 CXK558 - Jul 23, 18:25 UTCJul 23, 19:30 UTC1h 5m
2026-07-23 CXK558 - Jul 23, 15:25 UTCJul 23, 17:00 UTC1h 35m
2026-07-23 CXK558 - Jul 23, 10:20 UTCJul 23, 11:25 UTC1h 5m
2026-07-22 CXK558 - Jul 22, 19:05 UTCJul 22, 20:10 UTC1h 5m
2026-07-22 CXK558 - Jul 22, 18:40 UTCJul 22, 19:00 UTC20m
2026-07-22 CXK558 - Jul 22, 17:25 UTCJul 22, 18:30 UTC1h 5m
2026-07-22 CXK558 - Jul 22, 12:10 UTCJul 22, 12:55 UTC45m
2026-07-20 CXK558 MMU → MMU Jul 20, 20:40 UTCJul 20, 22:40 UTC2h 0m
2026-07-20 CXK558 - Jul 20, 18:05 UTCJul 20, 19:50 UTC1h 45m
2026-07-20 CXK558 - Jul 20, 15:10 UTCJul 20, 16:25 UTC1h 15m
2026-07-20 CXK558 - Jul 20, 13:05 UTCJul 20, 14:30 UTC1h 25m
2026-07-20 CXK558 - Jul 20, 10:35 UTCJul 20, 12:05 UTC1h 30m
2026-07-20 CXK558 - Jul 20, 01:40 UTCJul 20, 04:25 UTC2h 45m
2026-07-16 CXK558 - Jul 16, 16:09 UTCJul 16, 17:35 UTC1h 25m
2026-07-16 CXK558 - Jul 16, 09:50 UTCJul 16, 11:25 UTC1h 35m
2026-07-15 CXK558 - Jul 15, 11:45 UTCJul 15, 12:20 UTC35m
2026-07-15 CXK558 - Jul 15, 08:50 UTCJul 15, 10:35 UTC1h 45m
2026-07-14 CXK558 - Jul 14, 22:00 UTCJul 14, 23:45 UTC1h 44m
2026-07-14 CXK558 - Jul 14, 20:25 UTCJul 14, 20:55 UTC30m
2026-07-14 CXK558 - Jul 14, 17:05 UTCJul 14, 18:50 UTC1h 45m
2026-07-14 CXK558 - Jul 14, 09:50 UTCJul 14, 11:40 UTC1h 50m
2026-07-13 CXK558 - Jul 13, 20:40 UTCJul 13, 22:30 UTC1h 50m
2026-07-13 CXK558 - Jul 13, 18:05 UTCJul 13, 19:35 UTC1h 30m
2026-07-01 CXK558 - Jul 1, 13:50 UTCJul 1, 14:45 UTC55m
2026-07-01 CXK558 - Jul 1, 10:00 UTCJul 1, 12:30 UTC2h 30m
2026-06-30 CXK558 - Jun 30, 12:40 UTCJun 30, 13:20 UTC40m
2026-06-30 CXK558 - Jun 30, 10:40 UTCJun 30, 11:45 UTC1h 5m
2026-06-29 CXK558 - Jun 29, 15:04 UTCJun 29, 16:35 UTC1h 30m
2026-06-29 CXK558 - Jun 29, 12:00 UTCJun 29, 13:44 UTC1h 45m
2026-06-28 CXK558 MMU → MMU Jun 28, 22:49 UTCJun 29, 00:05 UTC1h 15m
2026-06-28 CXK558 - Jun 28, 20:14 UTCJun 28, 21:50 UTC1h 35m
2026-06-28 CXK558 - Jun 28, 17:30 UTCJun 28, 18:49 UTC1h 20m
2026-06-28 CXK558 - Jun 28, 15:55 UTCJun 28, 16:19 UTC25m
2026-06-28 CXK558 - Jun 28, 14:45 UTCJun 28, 15:24 UTC40m
2026-06-27 CXK558 - Jun 27, 11:55 UTCJun 27, 13:55 UTC2h 0m
2026-06-27 CXK558 - Jun 27, 08:55 UTCJun 27, 11:00 UTC2h 5m
2026-06-26 CXK558 - Jun 26, 22:44 UTCJun 27, 00:20 UTC1h 35m
2026-06-26 CXK558 - Jun 26, 19:45 UTCJun 26, 21:35 UTC1h 50m

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 N205Z page for operator, model, and routing details .

Mode-S A1A6D5 frequently asked

What is Mode-S code A1A6D5?
A1A6D5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N205Z.
Where is Mode-S A1A6D5 registered?
Mode-S code A1A6D5 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 A1A6D5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1A6D5, octal 50323325, decimal 10,594,005.
What flights does A1A6D5 operate?
Mode-S A1A6D5 has broadcast 1 distinct callsign, including CXK558.