Apparatus

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sensors Mode-S transponder

A05819

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N121HA · CESSNA 208 Caravan · operated by REDDING AERO ENTERPRISES INC

Hex
A05819
Octal
50054031
Decimal
10,508,313
Country
US
Tail
N121HA
Type
C208
No current signal · last broadcast 11h ago
Flights observed
48
Distinct callsigns
6
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A05819.

Country allocation

The ICAO 24-bit address A05819 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 6 distinct

Callsign Airline Flights Last seen
BXR494 - 32 2026-06-12
BXR8603 - 10 2026-06-26
BXR8604 - 2 2026-06-25
BXR1000 - 2 2026-06-02
BXR800 - 1 2026-04-29
BXR700 - 1 2026-04-23

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-06-26 BXR8603 - Jun 26, 00:55 UTCJun 26, 01:15 UTC20m
2026-06-25 BXR8603 - Jun 25, 16:09 UTCJun 25, 16:29 UTC20m
2026-06-25 BXR8604 - Jun 25, 14:39 UTCJun 25, 15:10 UTC30m
2026-06-25 BXR8603 - Jun 25, 00:55 UTCJun 25, 01:19 UTC25m
2026-06-24 BXR8603 - Jun 24, 23:59 UTCJun 25, 00:19 UTC20m
2026-06-24 BXR8603 - Jun 24, 01:04 UTCJun 24, 01:24 UTC20m
2026-06-23 BXR8603 - Jun 23, 16:20 UTCJun 23, 17:20 UTC1h 0m
2026-06-12 BXR8604 OAK → RDD Jun 12, 14:20 UTCJun 12, 15:50 UTC1h 30m
2026-06-12 BXR494 OAK → OAK Jun 12, 07:10 UTCJun 12, 10:55 UTC3h 45m
2026-06-11 BXR494 - Jun 11, 08:50 UTCJun 11, 10:35 UTC1h 45m
2026-06-11 BXR494 OAK → BUR Jun 11, 06:40 UTCJun 11, 08:20 UTC1h 40m
2026-06-10 BXR494 OAK → OAK Jun 10, 06:45 UTCJun 10, 10:35 UTC3h 50m
2026-06-09 BXR494 OAK → OAK Jun 9, 07:05 UTCJun 9, 10:50 UTC3h 45m
2026-06-06 BXR494 OAK → OAK Jun 6, 07:00 UTCJun 6, 10:39 UTC3h 40m
2026-06-05 BXR494 - Jun 5, 09:15 UTCJun 5, 10:55 UTC1h 40m
2026-06-05 BXR494 OAK → BUR Jun 5, 07:00 UTCJun 5, 08:40 UTC1h 40m
2026-06-04 BXR494 OAK → OAK Jun 4, 06:40 UTCJun 4, 10:20 UTC3h 40m
2026-06-03 BXR494 - Jun 3, 09:15 UTCJun 3, 10:50 UTC1h 35m
2026-06-03 BXR494 OAK → BUR Jun 3, 06:55 UTCJun 3, 08:35 UTC1h 40m
2026-06-02 BXR494 OAK → OAK Jun 2, 06:55 UTCJun 2, 10:50 UTC3h 55m
2026-06-02 BXR1000 RDD → OAK Jun 2, 00:05 UTCJun 2, 01:05 UTC1h 0m
2026-06-01 BXR1000 OAK → RDD Jun 1, 21:15 UTCJun 1, 23:10 UTC1h 55m
2026-05-30 BXR494 OAK → OAK May 30, 07:20 UTCMay 30, 11:05 UTC3h 45m
2026-05-29 BXR494 OAK → OAK May 29, 07:05 UTCMay 29, 10:50 UTC3h 45m
2026-05-28 BXR494 - May 28, 09:00 UTCMay 28, 10:35 UTC1h 35m
2026-05-28 BXR494 OAK → BUR May 28, 06:50 UTCMay 28, 08:30 UTC1h 40m
2026-05-27 BXR494 OAK → OAK May 27, 07:10 UTCMay 27, 10:55 UTC3h 45m
2026-05-23 BXR494 VNY → OAK May 23, 09:45 UTCMay 23, 11:20 UTC1h 35m
2026-05-23 BXR494 OAK → BUR May 23, 07:05 UTCMay 23, 08:45 UTC1h 40m
2026-05-22 BXR494 OAK → OAK May 22, 07:00 UTCMay 22, 10:45 UTC3h 45m
2026-05-21 BXR494 - May 21, 08:50 UTCMay 21, 10:25 UTC1h 35m
2026-05-21 BXR494 OAK → BUR May 21, 06:45 UTCMay 21, 08:45 UTC2h 0m
2026-05-20 BXR494 OAK → OAK May 20, 07:00 UTCMay 20, 10:45 UTC3h 45m
2026-05-19 BXR8603 - May 19, 20:10 UTCMay 19, 20:50 UTC40m
2026-05-19 BXR8603 OAK → RDD May 19, 14:15 UTCMay 19, 15:20 UTC1h 5m
2026-05-19 BXR494 OAK → OAK May 19, 06:55 UTCMay 19, 10:35 UTC3h 40m
2026-05-16 BXR494 - May 16, 09:10 UTCMay 16, 11:05 UTC1h 55m
2026-05-16 BXR494 OAK → BUR May 16, 07:05 UTCMay 16, 08:36 UTC1h 30m
2026-05-15 BXR494 - May 15, 09:15 UTCMay 15, 10:55 UTC1h 40m
2026-05-15 BXR494 OAK → BUR May 15, 06:50 UTCMay 15, 08:25 UTC1h 35m
2026-05-14 BXR494 OAK → OAK May 14, 06:50 UTCMay 14, 10:31 UTC3h 40m
2026-05-13 BXR494 - May 13, 08:55 UTCMay 13, 10:35 UTC1h 40m
2026-05-13 BXR494 - May 13, 06:35 UTCMay 13, 08:20 UTC1h 45m
2026-05-12 BXR494 - May 12, 06:50 UTCMay 12, 10:45 UTC3h 55m
2026-05-09 BXR8603 - May 9, 01:00 UTCMay 9, 01:15 UTC15m
2026-05-08 BXR8603 - May 8, 19:00 UTCMay 8, 19:45 UTC45m
2026-04-29 BXR800 - Apr 29, 16:30 UTCApr 29, 17:40 UTC1h 10m
2026-04-23 BXR700 - Apr 23, 18:25 UTCApr 23, 19:15 UTC50m

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 N121HA page for operator, model, and routing details .

Mode-S A05819 frequently asked

What is Mode-S code A05819?
A05819 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N121HA.
Where is Mode-S A05819 registered?
Mode-S code A05819 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 A05819 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05819, octal 50054031, decimal 10,508,313.
What flights does A05819 operate?
Mode-S A05819 has broadcast 6 distinct callsigns, including BXR494, BXR8603, BXR8604, BXR1000, BXR800.