Apparatus

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sensors Mode-S transponder

A5D4DA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N475NA · BRITISH AEROSPACE 146-100 Statesman · operated by NEPTUNE AVIATION SERVICES INC

Hex
A5D4DA
Octal
51352332
Decimal
10,867,930
Country
US
Tail
N475NA
Type
B461
No current signal · last broadcast 9h ago
Flights observed
78
Distinct callsigns
1
Country
US
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S A5D4DA.

Country allocation

The ICAO 24-bit address A5D4DA 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
TKR03 - 78 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TKR03 - Jul 14, 02:15 UTCJul 14, 02:35 UTC20m
2026-07-13 TKR03 - Jul 13, 22:45 UTCJul 13, 23:05 UTC20m
2026-07-12 TKR03 - Jul 12, 19:45 UTCJul 12, 20:30 UTC45m
2026-07-12 TKR03 COS → COS Jul 12, 18:40 UTCJul 12, 19:20 UTC40m
2026-07-10 TKR03 - Jul 10, 20:25 UTCJul 10, 21:00 UTC35m
2026-07-10 TKR03 - Jul 10, 19:30 UTCJul 10, 20:20 UTC50m
2026-07-10 TKR03 - Jul 10, 18:10 UTCJul 10, 18:50 UTC40m
2026-07-10 TKR03 COS → COS Jul 10, 17:05 UTCJul 10, 17:45 UTC40m
2026-07-08 TKR03 COS → COS Jul 8, 21:15 UTCJul 8, 22:40 UTC1h 25m
2026-07-08 TKR03 - Jul 8, 19:15 UTCJul 8, 20:05 UTC50m
2026-07-08 TKR03 - Jul 8, 18:05 UTCJul 8, 18:55 UTC50m
2026-07-08 TKR03 - Jul 8, 02:25 UTCJul 8, 02:50 UTC25m
2026-07-08 TKR03 - Jul 8, 00:55 UTCJul 8, 01:30 UTC35m
2026-07-07 TKR03 - Jul 7, 23:05 UTCJul 7, 23:35 UTC30m
2026-07-07 TKR03 - Jul 7, 21:00 UTCJul 7, 22:35 UTC1h 35m
2026-07-06 TKR03 - Jul 6, 20:30 UTCJul 6, 20:55 UTC25m
2026-07-06 TKR03 COS → COS Jul 6, 19:40 UTCJul 6, 20:25 UTC45m
2026-07-06 TKR03 COS → COS Jul 6, 18:55 UTCJul 6, 19:20 UTC25m
2026-07-06 TKR03 - Jul 6, 18:05 UTCJul 6, 18:50 UTC45m
2026-07-06 TKR03 COS → COS Jul 6, 17:10 UTCJul 6, 17:55 UTC45m
2026-07-06 TKR03 COS → COS Jul 6, 02:35 UTCJul 6, 03:00 UTC25m
2026-07-06 TKR03 - Jul 6, 01:40 UTCJul 6, 02:30 UTC50m
2026-07-05 TKR03 - Jul 5, 23:45 UTCJul 6, 00:20 UTC35m
2026-07-05 TKR03 - Jul 5, 22:25 UTCJul 5, 22:55 UTC30m
2026-07-05 TKR03 - Jul 5, 20:30 UTCJul 5, 21:40 UTC1h 10m
2026-07-05 TKR03 - Jul 5, 00:15 UTCJul 5, 01:05 UTC50m
2026-07-04 TKR03 - Jul 4, 00:40 UTCJul 4, 02:40 UTC2h 0m
2026-07-03 TKR03 - Jul 3, 22:55 UTCJul 4, 00:00 UTC1h 5m
2026-07-02 TKR03 - Jul 2, 19:00 UTCJul 2, 19:35 UTC35m
2026-07-02 TKR03 COS → COS Jul 2, 18:00 UTCJul 2, 18:40 UTC40m
2026-07-02 TKR03 - Jul 2, 02:10 UTCJul 2, 02:35 UTC25m
2026-07-02 TKR03 - Jul 2, 01:10 UTCJul 2, 02:00 UTC50m
2026-07-02 TKR03 COS → COS Jul 2, 00:15 UTCJul 2, 00:50 UTC35m
2026-07-01 TKR03 - Jul 1, 23:25 UTCJul 2, 00:10 UTC45m
2026-07-01 TKR03 - Jul 1, 22:25 UTCJul 1, 23:00 UTC35m
2026-07-01 TKR03 COS → COS Jul 1, 21:25 UTCJul 1, 22:20 UTC55m
2026-07-01 TKR03 - Jul 1, 20:40 UTCJul 1, 21:20 UTC40m
2026-07-01 TKR03 COS → COS Jul 1, 19:45 UTCJul 1, 20:15 UTC30m
2026-07-01 TKR03 - Jul 1, 17:40 UTCJul 1, 18:35 UTC55m
2026-07-01 TKR03 COS → COS Jul 1, 16:45 UTCJul 1, 17:35 UTC50m
2026-06-30 TKR03 - Jun 30, 19:20 UTCJun 30, 19:55 UTC35m
2026-06-30 TKR03 COS → COS Jun 30, 18:00 UTCJun 30, 18:45 UTC45m
2026-06-30 TKR03 - Jun 30, 17:05 UTCJun 30, 17:35 UTC30m
2026-06-30 TKR03 COS → COS Jun 30, 15:10 UTCJun 30, 16:35 UTC1h 25m
2026-06-29 TKR03 - Jun 29, 01:05 UTCJun 29, 02:05 UTC1h 0m
2026-06-28 TKR03 - Jun 28, 15:29 UTCJun 28, 18:59 UTC3h 30m
2026-06-27 TKR03 - Jun 27, 00:55 UTCJun 27, 02:59 UTC2h 5m
2026-06-24 TKR03 - Jun 24, 00:05 UTCJun 24, 00:40 UTC35m
2026-06-23 TKR03 - Jun 23, 23:10 UTCJun 23, 23:24 UTC15m
2026-06-19 TKR03 - Jun 19, 01:29 UTCJun 19, 01:39 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 N475NA page for operator, model, and routing details .

Mode-S A5D4DA frequently asked

What is Mode-S code A5D4DA?
A5D4DA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N475NA.
Where is Mode-S A5D4DA registered?
Mode-S code A5D4DA 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 A5D4DA broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A5D4DA, octal 51352332, decimal 10,867,930.
What flights does A5D4DA operate?
Mode-S A5D4DA has broadcast 1 distinct callsign, including TKR03.