Apparatus

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sensors Mode-S transponder

A8B744

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N6605D · CESSNA 172 Skyhawk · operated by ALAMEDA AERO CLUB

Hex
A8B744
Octal
52133504
Decimal
11,056,964
Country
US
Tail
N6605D
Type
C172
No current signal · last broadcast 1h ago
Flights observed
121
Distinct callsigns
1
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S A8B744.

Country allocation

The ICAO 24-bit address A8B744 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
N6605D - 121 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-26 N6605D - Jun 26, 02:14 UTCJun 26, 02:30 UTC15m
2026-06-08 N6605D OAK → LVK Jun 8, 21:00 UTCJun 8, 21:10 UTC10m
2026-06-08 N6605D OAK → OAK Jun 8, 17:40 UTCJun 8, 18:35 UTC55m
2026-06-08 N6605D - Jun 8, 04:35 UTCJun 8, 06:00 UTC1h 25m
2026-06-08 N6605D - Jun 8, 03:05 UTCJun 8, 03:40 UTC35m
2026-06-07 N6605D OAK → OAK Jun 7, 22:50 UTCJun 7, 23:25 UTC35m
2026-06-07 N6605D OAK → OAK Jun 7, 17:45 UTCJun 7, 18:35 UTC50m
2026-06-07 N6605D - Jun 7, 04:05 UTCJun 7, 04:35 UTC30m
2026-06-07 N6605D - Jun 7, 02:04 UTCJun 7, 03:30 UTC1h 25m
2026-06-06 N6605D OAK → OAK Jun 6, 21:20 UTCJun 6, 22:34 UTC1h 15m
2026-06-06 N6605D OAK → OAK Jun 6, 18:14 UTCJun 6, 19:40 UTC1h 25m
2026-06-06 N6605D - Jun 6, 00:25 UTCJun 6, 01:40 UTC1h 15m
2026-06-05 N6605D - Jun 5, 21:15 UTCJun 5, 22:55 UTC1h 40m
2026-06-05 N6605D OAK → OAK Jun 5, 16:55 UTCJun 5, 17:55 UTC1h 0m
2026-06-05 N6605D OAK → OAK Jun 5, 02:35 UTCJun 5, 05:00 UTC2h 25m
2026-06-05 N6605D - Jun 5, 00:10 UTCJun 5, 01:15 UTC1h 5m
2026-06-04 N6605D - Jun 4, 23:00 UTCJun 4, 23:35 UTC35m
2026-06-04 N6605D OAK → OAK Jun 4, 16:40 UTCJun 4, 18:55 UTC2h 15m
2026-06-04 N6605D OAK → OAK Jun 4, 04:15 UTCJun 4, 04:35 UTC20m
2026-06-02 N6605D OAK → OAK Jun 2, 17:15 UTCJun 2, 17:55 UTC40m
2026-06-02 N6605D - Jun 2, 04:15 UTCJun 2, 04:55 UTC40m
2026-06-02 N6605D - Jun 2, 01:50 UTCJun 2, 03:45 UTC1h 55m
2026-06-01 N6605D OAK → OAK Jun 1, 23:05 UTCJun 2, 00:15 UTC1h 10m
2026-06-01 N6605D NOT → OAK Jun 1, 20:15 UTCJun 1, 21:15 UTC1h 0m
2026-06-01 N6605D OAK → NOT Jun 1, 19:35 UTCJun 1, 19:55 UTC20m
2026-06-01 N6605D OAK → OAK Jun 1, 16:20 UTCJun 1, 17:50 UTC1h 30m
2026-06-01 N6605D - Jun 1, 06:40 UTCJun 1, 07:05 UTC25m
2026-06-01 N6605D - Jun 1, 04:00 UTCJun 1, 05:05 UTC1h 5m
2026-06-01 N6605D - Jun 1, 01:50 UTCJun 1, 02:30 UTC40m
2026-06-01 N6605D OAK → STS Jun 1, 00:35 UTCJun 1, 01:15 UTC40m
2026-05-31 N6605D OAK → OAK May 31, 21:10 UTCMay 31, 23:05 UTC1h 55m
2026-05-31 N6605D - May 31, 19:35 UTCMay 31, 20:00 UTC25m
2026-05-31 N6605D - May 31, 17:30 UTCMay 31, 18:05 UTC35m
2026-05-31 N6605D - May 31, 00:50 UTCMay 31, 01:11 UTC21m
2026-05-30 N6605D - May 30, 22:55 UTCMay 30, 23:35 UTC40m
2026-05-30 N6605D OAK → SMX May 30, 18:45 UTCMay 30, 20:30 UTC1h 45m
2026-05-30 N6605D - May 30, 03:00 UTCMay 30, 03:40 UTC40m
2026-05-30 N6605D - May 30, 01:15 UTCMay 30, 02:15 UTC1h 0m
2026-05-29 N6605D - May 29, 00:15 UTCMay 29, 01:15 UTC1h 0m
2026-05-28 N6605D - May 28, 23:05 UTCMay 28, 23:30 UTC25m
2026-05-28 N6605D - May 28, 19:40 UTCMay 28, 20:35 UTC55m
2026-05-28 N6605D - May 28, 17:50 UTCMay 28, 18:50 UTC1h 0m
2026-05-27 N6605D OAK → OAK May 27, 20:50 UTCMay 27, 22:00 UTC1h 10m
2026-05-26 N6605D OAK → OAK May 26, 04:39 UTCMay 26, 05:00 UTC20m
2026-05-25 N6605D OAK → OAK May 25, 19:50 UTCMay 25, 22:05 UTC2h 15m
2026-05-23 N6605D OAK → OAK May 23, 22:20 UTCMay 23, 22:55 UTC35m
2026-05-23 N6605D OAK → OAK May 23, 20:00 UTCMay 23, 21:10 UTC1h 10m
2026-05-23 N6605D - May 23, 00:05 UTCMay 23, 00:50 UTC45m
2026-05-22 N6605D - May 22, 22:45 UTCMay 22, 23:25 UTC40m
2026-05-22 N6605D - May 22, 19:50 UTCMay 22, 20:30 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 N6605D page for operator, model, and routing details .

Mode-S A8B744 frequently asked

What is Mode-S code A8B744?
A8B744 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N6605D.
Where is Mode-S A8B744 registered?
Mode-S code A8B744 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 A8B744 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A8B744, octal 52133504, decimal 11,056,964.
What flights does A8B744 operate?
Mode-S A8B744 has broadcast 1 distinct callsign, including N6605D.