Apparatus

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sensors Mode-S transponder

A2CD44

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N28ST · operated by PARAGON AIRPLANE LEASING CO

Hex
A2CD44
Octal
50546504
Decimal
10,669,380
Country
US
Tail
N28ST
Type
P28A
No current signal · last broadcast Jul 25, 21:20 UTC
Flights observed
301
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 21:20 UTC

Last known position

Most recent position reported by Mode-S A2CD44.

Country allocation

The ICAO 24-bit address A2CD44 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
N28ST - 301 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N28ST FMY → FMY Jul 25, 20:20 UTCJul 25, 21:20 UTC1h 0m
2026-07-25 N28ST - Jul 25, 18:25 UTCJul 25, 19:25 UTC1h 0m
2026-07-25 N28ST - Jul 25, 14:40 UTCJul 25, 15:35 UTC55m
2026-07-25 N28ST - Jul 25, 12:35 UTCJul 25, 13:35 UTC1h 0m
2026-07-24 N28ST - Jul 24, 23:35 UTCJul 25, 00:40 UTC1h 5m
2026-07-24 N28ST FMY → FMY Jul 24, 16:05 UTCJul 24, 17:00 UTC55m
2026-07-24 N28ST FMY → FMY Jul 24, 12:20 UTCJul 24, 13:20 UTC1h 0m
2026-07-24 N28ST FMY → FMY Jul 24, 00:40 UTCJul 24, 01:50 UTC1h 10m
2026-07-23 N28ST FMY → FMY Jul 23, 21:20 UTCJul 23, 22:05 UTC45m
2026-07-23 N28ST FMY → FMY Jul 23, 18:30 UTCJul 23, 19:40 UTC1h 10m
2026-07-23 N28ST - Jul 23, 14:45 UTCJul 23, 15:20 UTC35m
2026-07-23 N28ST FMY → FMY Jul 23, 13:35 UTCJul 23, 13:55 UTC20m
2026-07-23 N28ST FMY → FMY Jul 23, 00:35 UTCJul 23, 01:35 UTC1h 0m
2026-07-22 N28ST - Jul 22, 16:20 UTCJul 22, 18:25 UTC2h 5m
2026-07-22 N28ST - Jul 22, 11:10 UTCJul 22, 11:45 UTC35m
2026-07-21 N28ST - Jul 21, 17:40 UTCJul 21, 18:40 UTC1h 0m
2026-07-21 N28ST - Jul 21, 11:20 UTCJul 21, 12:35 UTC1h 15m
2026-07-19 N28ST - Jul 19, 20:35 UTCJul 19, 22:10 UTC1h 35m
2026-07-19 N28ST FMY → FMY Jul 19, 16:25 UTCJul 19, 17:15 UTC50m
2026-07-18 N28ST - Jul 18, 19:15 UTCJul 18, 20:35 UTC1h 20m
2026-07-17 N28ST FMY → FMY Jul 17, 18:19 UTCJul 17, 19:05 UTC45m
2026-07-16 N28ST - Jul 16, 22:45 UTCJul 16, 23:40 UTC55m
2026-07-16 N28ST FMY → FMY Jul 16, 19:35 UTCJul 16, 20:19 UTC45m
2026-07-12 N28ST - Jul 12, 01:05 UTCJul 12, 03:15 UTC2h 10m
2026-07-11 N28ST - Jul 11, 17:40 UTCJul 11, 18:35 UTC55m
2026-07-11 N28ST - Jul 11, 12:30 UTCJul 11, 13:45 UTC1h 15m
2026-07-10 N28ST - Jul 10, 18:00 UTCJul 10, 18:30 UTC30m
2026-07-10 N28ST - Jul 10, 15:45 UTCJul 10, 16:45 UTC1h 0m
2026-07-10 N28ST - Jul 10, 01:00 UTCJul 10, 01:15 UTC15m
2026-07-09 N28ST - Jul 9, 22:35 UTCJul 9, 23:45 UTC1h 10m
2026-07-09 N28ST - Jul 9, 19:50 UTCJul 9, 20:40 UTC50m
2026-07-09 N28ST FMY → FMY Jul 9, 17:10 UTCJul 9, 18:30 UTC1h 20m
2026-07-09 N28ST - Jul 9, 13:05 UTCJul 9, 14:15 UTC1h 10m
2026-07-09 N28ST - Jul 9, 01:45 UTCJul 9, 04:40 UTC2h 55m
2026-07-08 N28ST - Jul 8, 20:40 UTCJul 8, 23:25 UTC2h 45m
2026-07-08 N28ST - Jul 8, 18:40 UTCJul 8, 19:40 UTC1h 0m
2026-07-08 N28ST - Jul 8, 16:30 UTCJul 8, 17:35 UTC1h 5m
2026-07-08 N28ST - Jul 8, 14:25 UTCJul 8, 14:45 UTC20m
2026-07-08 N28ST FMY → FMY Jul 8, 12:20 UTCJul 8, 13:30 UTC1h 10m
2026-07-07 N28ST - Jul 7, 16:15 UTCJul 7, 17:25 UTC1h 10m
2026-07-07 N28ST - Jul 7, 12:40 UTCJul 7, 13:50 UTC1h 10m
2026-07-06 N28ST - Jul 6, 15:35 UTCJul 6, 16:45 UTC1h 10m
2026-07-06 N28ST - Jul 6, 13:25 UTCJul 6, 14:40 UTC1h 15m
2026-07-05 N28ST FMY → FMY Jul 5, 23:50 UTCJul 6, 00:50 UTC1h 0m
2026-07-05 N28ST - Jul 5, 19:40 UTCJul 5, 20:45 UTC1h 5m
2026-07-05 N28ST FMY → FMY Jul 5, 17:35 UTCJul 5, 18:40 UTC1h 5m
2026-07-03 N28ST - Jul 3, 14:00 UTCJul 3, 14:45 UTC45m
2026-07-03 N28ST - Jul 3, 11:45 UTCJul 3, 12:55 UTC1h 10m
2026-07-02 N28ST FMY → FMY Jul 2, 21:35 UTCJul 2, 22:30 UTC55m
2026-07-02 N28ST FMY → FMY Jul 2, 16:35 UTCJul 2, 17:35 UTC1h 0m

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 N28ST page for operator, model, and routing details .

Mode-S A2CD44 frequently asked

What is Mode-S code A2CD44?
A2CD44 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N28ST.
Where is Mode-S A2CD44 registered?
Mode-S code A2CD44 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 A2CD44 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2CD44, octal 50546504, decimal 10,669,380.
What flights does A2CD44 operate?
Mode-S A2CD44 has broadcast 1 distinct callsign, including N28ST.