Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

AB3623

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N821SA · PILATUS PC-12 · operated by TVPX ARS INC TRUSTEE

Hex
AB3623
Octal
52633043
Decimal
11,220,515
Country
US
Tail
N821SA
Type
PC12
No current signal · last broadcast 11h ago
Flights observed
189
Distinct callsigns
3
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S AB3623.

Country allocation

The ICAO 24-bit address AB3623 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 3 distinct

Callsign Airline Flights Last seen
GPD730 Tradewind Aviation 161 2026-05-29
GPD821 Tradewind Aviation 25 2026-04-20
N821SA - 3 2026-04-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 GPD730 SBH → SJU May 29, 18:15 UTCMay 29, 18:45 UTC30m
2026-05-29 GPD730 SBH → SJU May 29, 17:00 UTCMay 29, 17:30 UTC30m
2026-05-29 GPD730 SBH → SJU May 29, 13:55 UTCMay 29, 15:20 UTC1h 25m
2026-05-29 GPD730 SBH → SJU May 29, 12:35 UTCMay 29, 12:50 UTC15m
2026-05-28 GPD730 SBH → SJU May 28, 19:40 UTCMay 28, 20:25 UTC45m
2026-05-28 GPD730 SBH → SJU May 28, 16:05 UTCMay 28, 16:40 UTC35m
2026-05-28 GPD730 SBH → SJU May 28, 11:50 UTCMay 28, 13:35 UTC1h 45m
2026-05-28 GPD730 SBH → SJU May 28, 00:55 UTCMay 28, 01:15 UTC20m
2026-05-27 GPD730 SBH → SJU May 27, 23:55 UTCMay 28, 00:40 UTC45m
2026-05-27 GPD730 SBH → SJU May 27, 20:55 UTCMay 27, 21:30 UTC35m
2026-05-27 GPD730 SBH → SJU May 27, 19:25 UTCMay 27, 20:10 UTC45m
2026-05-27 GPD730 SBH → SJU May 27, 16:30 UTCMay 27, 17:35 UTC1h 5m
2026-05-27 GPD730 SBH → SJU May 27, 15:10 UTCMay 27, 15:20 UTC10m
2026-05-27 GPD730 SBH → SJU May 27, 13:30 UTCMay 27, 13:55 UTC25m
2026-05-27 GPD730 SBH → SJU May 27, 11:15 UTCMay 27, 11:45 UTC30m
2026-05-26 GPD730 SBH → SJU May 26, 16:00 UTCMay 26, 19:15 UTC3h 15m
2026-05-26 GPD730 SBH → SJU May 26, 12:50 UTCMay 26, 14:55 UTC2h 5m
2026-05-26 GPD730 SBH → SJU May 26, 11:15 UTCMay 26, 11:50 UTC35m
2026-05-26 GPD730 SBH → SJU May 26, 01:24 UTCMay 26, 01:55 UTC30m
2026-05-25 GPD730 SBH → SJU May 25, 22:55 UTCMay 25, 23:40 UTC45m
2026-05-25 GPD730 SBH → SJU May 25, 21:30 UTCMay 25, 22:19 UTC50m
2026-05-25 GPD730 SBH → SJU May 25, 19:54 UTCMay 25, 20:59 UTC1h 5m
2026-05-25 GPD730 SBH → SJU May 25, 18:15 UTCMay 25, 19:10 UTC55m
2026-05-25 GPD730 SBH → SJU May 25, 16:45 UTCMay 25, 17:35 UTC50m
2026-05-25 GPD730 SBH → SJU May 25, 15:00 UTCMay 25, 16:00 UTC1h 0m
2026-05-24 GPD730 SBH → SJU May 24, 23:00 UTCMay 24, 23:25 UTC25m
2026-05-24 GPD730 SBH → SJU May 24, 20:55 UTCMay 24, 21:45 UTC50m
2026-05-24 GPD730 SBH → SJU May 24, 16:55 UTCMay 24, 18:20 UTC1h 25m
2026-05-24 GPD730 SBH → SJU May 24, 12:50 UTCMay 24, 13:50 UTC1h 0m
2026-05-24 GPD730 SBH → SJU May 24, 11:50 UTCMay 24, 12:10 UTC20m
2026-05-23 GPD730 SBH → SJU May 23, 17:20 UTCMay 23, 17:40 UTC20m
2026-05-23 GPD730 SBH → SJU May 23, 15:25 UTCMay 23, 16:30 UTC1h 5m
2026-05-23 GPD730 SBH → SJU May 23, 14:00 UTCMay 23, 14:40 UTC40m
2026-05-23 GPD730 SBH → SJU May 23, 00:00 UTCMay 23, 01:35 UTC1h 35m
2026-05-22 GPD730 SBH → SJU May 22, 22:55 UTCMay 22, 23:20 UTC25m
2026-05-22 GPD730 SBH → SJU May 22, 20:45 UTCMay 22, 22:10 UTC1h 25m
2026-05-22 GPD730 SBH → SJU May 22, 17:40 UTCMay 22, 19:45 UTC2h 5m
2026-05-22 GPD730 SBH → SJU May 22, 16:05 UTCMay 22, 16:50 UTC45m
2026-05-22 GPD730 SBH → SJU May 22, 13:10 UTCMay 22, 13:55 UTC45m
2026-05-22 GPD730 SBH → SJU May 22, 12:00 UTCMay 22, 12:40 UTC40m
2026-05-22 GPD730 SBH → SJU May 22, 10:55 UTCMay 22, 11:05 UTC10m
2026-05-21 GPD730 SBH → SJU May 21, 22:50 UTCMay 21, 23:30 UTC40m
2026-05-21 GPD730 SBH → SJU May 21, 21:40 UTCMay 21, 22:15 UTC35m
2026-05-21 GPD730 SBH → SJU May 21, 17:30 UTCMay 21, 18:45 UTC1h 15m
2026-05-21 GPD730 SBH → SJU May 21, 15:20 UTCMay 21, 16:45 UTC1h 25m
2026-05-21 GPD730 SBH → SJU May 21, 14:10 UTCMay 21, 14:35 UTC25m
2026-05-21 GPD730 SBH → SJU May 21, 11:30 UTCMay 21, 13:05 UTC1h 35m
2026-05-20 GPD730 SBH → SJU May 20, 21:25 UTCMay 20, 22:30 UTC1h 5m
2026-05-20 GPD730 SBH → SJU May 20, 19:35 UTCMay 20, 19:55 UTC20m
2026-05-20 GPD730 SBH → SJU May 20, 17:55 UTCMay 20, 18:30 UTC35m

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 N821SA page for operator, model, and routing details .

Mode-S AB3623 frequently asked

What is Mode-S code AB3623?
AB3623 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N821SA.
Where is Mode-S AB3623 registered?
Mode-S code AB3623 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 AB3623 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 AB3623, octal 52633043, decimal 11,220,515.
What flights does AB3623 operate?
Mode-S AB3623 has broadcast 3 distinct callsigns, including GPD730, GPD821, N821SA.