Apparatus

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sensors Mode-S transponder

A1DCDA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N219VP · BEECH 1900 · operated by ALPINE AVIATION INC

Hex
A1DCDA
Octal
50356332
Decimal
10,607,834
Country
US
Tail
N219VP
Type
B190
No current signal · last broadcast 7h ago
Flights observed
39
Distinct callsigns
7
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A1DCDA.

Country allocation

The ICAO 24-bit address A1DCDA 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 7 distinct

Callsign Airline Flights Last seen
AIP1856 Alpine Air Express 16 2026-06-02
AIP1855 Alpine Air Express 13 2026-05-30
AIP1876 Alpine Air Express 3 2026-06-01
AIP1875 Alpine Air Express 3 2026-06-02
AIP1842 Alpine Air Express 2 2026-05-07
AIP9921 Alpine Air Express 1 2026-05-28
AIP1841 Alpine Air Express 1 2026-05-08

Recent flights last 39

DateFlightRouteTakeoffLandingDuration
2026-06-02 AIP1856 DEN → HDN Jun 2, 13:20 UTCJun 2, 13:45 UTC25m
2026-06-02 AIP1875 DEN → GJT Jun 2, 01:45 UTCJun 2, 02:45 UTC1h 0m
2026-06-01 AIP1876 DEN → GJT Jun 1, 23:25 UTCJun 1, 23:45 UTC20m
2026-05-30 AIP1855 HDN → DEN May 30, 15:30 UTCMay 30, 16:10 UTC40m
2026-05-30 AIP1856 DEN → HDN May 30, 13:20 UTCMay 30, 13:45 UTC25m
2026-05-28 AIP9921 CYS → DEN May 28, 16:05 UTCMay 28, 16:25 UTC20m
2026-05-08 AIP1856 DEN → HDN May 8, 16:05 UTCMay 8, 16:20 UTC15m
2026-05-08 AIP1856 DEN → HDN May 8, 13:45 UTCMay 8, 14:05 UTC20m
2026-05-08 AIP1841 ALS → DEN May 8, 01:14 UTCMay 8, 01:55 UTC40m
2026-05-07 AIP1842 DEN → SLT May 7, 14:45 UTCMay 7, 15:00 UTC15m
2026-05-07 AIP1842 DEN → SLT May 7, 13:30 UTCMay 7, 14:05 UTC35m
2026-05-07 AIP1855 HDN → DEN May 7, 02:05 UTCMay 7, 02:25 UTC20m
2026-05-06 AIP1856 DEN → HDN May 6, 14:40 UTCMay 6, 15:00 UTC20m
2026-05-05 AIP1855 HDN → DEN May 5, 22:50 UTCMay 5, 23:30 UTC40m
2026-05-05 AIP1856 DEN → HDN May 5, 13:40 UTCMay 5, 14:05 UTC25m
2026-05-05 AIP1855 HDN → DEN May 5, 01:55 UTCMay 5, 02:20 UTC25m
2026-05-04 AIP1856 DEN → HDN May 4, 23:10 UTCMay 4, 23:45 UTC35m
2026-05-02 AIP1855 HDN → DEN May 2, 15:50 UTCMay 2, 16:20 UTC30m
2026-05-02 AIP1856 DEN → HDN May 2, 13:20 UTCMay 2, 13:50 UTC30m
2026-05-02 AIP1855 HDN → DEN May 2, 01:15 UTCMay 2, 02:00 UTC45m
2026-05-01 AIP1856 DEN → HDN May 1, 13:05 UTCMay 1, 13:40 UTC35m
2026-05-01 AIP1855 HDN → DEN May 1, 01:55 UTCMay 1, 02:35 UTC40m
2026-04-30 AIP1856 DEN → HDN Apr 30, 13:45 UTCApr 30, 14:15 UTC30m
2026-04-29 AIP1855 HDN → DEN Apr 29, 01:40 UTCApr 29, 02:09 UTC30m
2026-04-28 AIP1856 DEN → HDN Apr 28, 13:25 UTCApr 28, 14:00 UTC35m
2026-04-28 AIP1875 DEN → GJT Apr 28, 01:05 UTCApr 28, 01:55 UTC50m
2026-04-27 AIP1876 DEN → GJT Apr 27, 23:20 UTCApr 27, 23:50 UTC30m
2026-04-22 AIP1855 HDN → DEN Apr 22, 01:35 UTCApr 22, 02:15 UTC40m
2026-04-21 AIP1856 DEN → HDN Apr 21, 13:20 UTCApr 21, 13:50 UTC30m
2026-04-21 AIP1875 DEN → GJT Apr 21, 01:25 UTCApr 21, 02:05 UTC40m
2026-04-20 AIP1876 DEN → GJT Apr 20, 23:25 UTCApr 20, 23:45 UTC20m
2026-04-18 AIP1855 HDN → DEN Apr 18, 15:55 UTCApr 18, 16:20 UTC25m
2026-04-18 AIP1856 DEN → HDN Apr 18, 13:25 UTCApr 18, 14:00 UTC35m
2026-04-18 AIP1855 HDN → DEN Apr 18, 01:40 UTCApr 18, 02:20 UTC40m
2026-04-17 AIP1856 DEN → HDN Apr 17, 13:00 UTCApr 17, 13:15 UTC15m
2026-04-17 AIP1855 HDN → DEN Apr 17, 01:45 UTCApr 17, 02:25 UTC40m
2026-04-16 AIP1856 DEN → HDN Apr 16, 13:15 UTCApr 16, 13:40 UTC25m
2026-04-16 AIP1855 HDN → DEN Apr 16, 01:25 UTCApr 16, 01:55 UTC30m
2026-04-15 AIP1856 DEN → HDN Apr 15, 13:40 UTCApr 15, 14:05 UTC25m

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 N219VP page for operator, model, and routing details .

Mode-S A1DCDA frequently asked

What is Mode-S code A1DCDA?
A1DCDA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N219VP.
Where is Mode-S A1DCDA registered?
Mode-S code A1DCDA 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 A1DCDA 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 A1DCDA, octal 50356332, decimal 10,607,834.
What flights does A1DCDA operate?
Mode-S A1DCDA has broadcast 7 distinct callsigns, including AIP1856, AIP1855, AIP1876, AIP1875, AIP1842.