Apparatus

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sensors Mode-S transponder

A1CDD7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N215U · operated by PARAGON AIRPLANE LEASING CO

Hex
A1CDD7
Octal
50346727
Decimal
10,603,991
Country
US
Tail
N215U
Type
P28A
No current signal · last broadcast 8h ago
Flights observed
249
Distinct callsigns
1
Country
US
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S A1CDD7.

Country allocation

The ICAO 24-bit address A1CDD7 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
N215U - 249 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N215U FMY → FMY Jul 13, 20:05 UTCJul 13, 21:05 UTC1h 0m
2026-07-13 N215U FMY → FMY Jul 13, 12:35 UTCJul 13, 14:10 UTC1h 35m
2026-07-13 N215U - Jul 13, 11:25 UTCJul 13, 11:50 UTC25m
2026-07-12 N215U - Jul 12, 18:25 UTCJul 12, 19:20 UTC55m
2026-07-12 N215U - Jul 12, 13:45 UTCJul 12, 14:40 UTC55m
2026-07-11 N215U FMY → FMY Jul 11, 22:20 UTCJul 11, 23:00 UTC40m
2026-07-11 N215U FMY → FMY Jul 11, 18:30 UTCJul 11, 19:40 UTC1h 10m
2026-07-11 N215U - Jul 11, 16:15 UTCJul 11, 17:40 UTC1h 25m
2026-07-11 N215U - Jul 11, 14:30 UTCJul 11, 15:40 UTC1h 10m
2026-07-11 N215U - Jul 11, 12:05 UTCJul 11, 13:15 UTC1h 10m
2026-07-11 N215U FMY → FMY Jul 11, 00:45 UTCJul 11, 01:55 UTC1h 10m
2026-07-10 N215U FMY → FMY Jul 10, 15:20 UTCJul 10, 16:25 UTC1h 5m
2026-07-10 N215U FMY → FMY Jul 10, 11:35 UTCJul 10, 12:35 UTC1h 0m
2026-07-09 N215U - Jul 9, 21:50 UTCJul 9, 23:00 UTC1h 10m
2026-07-09 N215U FMY → FMY Jul 9, 19:20 UTCJul 9, 20:30 UTC1h 10m
2026-07-09 N215U FMY → FMY Jul 9, 17:25 UTCJul 9, 18:45 UTC1h 20m
2026-07-09 N215U - Jul 9, 14:30 UTCJul 9, 15:35 UTC1h 5m
2026-07-09 N215U - Jul 9, 12:25 UTCJul 9, 13:40 UTC1h 15m
2026-07-09 N215U - Jul 9, 02:00 UTCJul 9, 03:25 UTC1h 25m
2026-07-08 N215U - Jul 8, 20:20 UTCJul 8, 21:30 UTC1h 10m
2026-07-08 N215U - Jul 8, 17:15 UTCJul 8, 18:10 UTC55m
2026-07-08 N215U - Jul 8, 15:10 UTCJul 8, 15:40 UTC30m
2026-07-08 N215U - Jul 8, 12:25 UTCJul 8, 13:25 UTC1h 0m
2026-07-07 N215U FMY → FMY Jul 7, 14:35 UTCJul 7, 15:25 UTC50m
2026-07-07 N215U - Jul 7, 12:45 UTCJul 7, 13:35 UTC50m
2026-07-07 N215U - Jul 7, 10:45 UTCJul 7, 11:35 UTC50m
2026-07-06 N215U FMY → FMY Jul 6, 16:10 UTCJul 6, 17:30 UTC1h 20m
2026-07-06 N215U FMY → FMY Jul 6, 14:30 UTCJul 6, 15:30 UTC1h 0m
2026-07-06 N215U - Jul 6, 12:35 UTCJul 6, 13:45 UTC1h 10m
2026-07-05 N215U FMY → FMY Jul 5, 20:15 UTCJul 5, 20:55 UTC40m
2026-07-03 N215U - Jul 3, 11:15 UTCJul 3, 12:40 UTC1h 25m
2026-07-02 N215U - Jul 2, 14:40 UTCJul 2, 15:50 UTC1h 10m
2026-07-01 N215U FMY → FMY Jul 1, 17:20 UTCJul 1, 18:50 UTC1h 30m
2026-07-01 N215U - Jul 1, 14:25 UTCJul 1, 16:00 UTC1h 35m
2026-07-01 N215U - Jul 1, 12:55 UTCJul 1, 13:15 UTC20m
2026-07-01 N215U - Jul 1, 12:05 UTCJul 1, 12:20 UTC15m
2026-06-30 N215U - Jun 30, 17:25 UTCJun 30, 18:25 UTC1h 0m
2026-06-30 N215U - Jun 30, 14:20 UTCJun 30, 15:45 UTC1h 25m
2026-06-29 N215U FMY → FMY Jun 29, 19:15 UTCJun 29, 20:35 UTC1h 20m
2026-06-29 N215U - Jun 29, 15:19 UTCJun 29, 16:19 UTC1h 0m
2026-06-28 N215U - Jun 28, 15:20 UTCJun 28, 16:35 UTC1h 15m
2026-06-26 N215U - Jun 26, 14:55 UTCJun 26, 15:20 UTC25m
2026-06-26 N215U FMY → FMY Jun 26, 11:49 UTCJun 26, 13:40 UTC1h 50m
2026-06-25 N215U - Jun 25, 16:35 UTCJun 25, 17:34 UTC1h 0m
2026-06-25 N215U - Jun 25, 14:44 UTCJun 25, 15:34 UTC50m
2026-06-25 N215U - Jun 25, 12:40 UTCJun 25, 13:35 UTC55m
2026-06-24 N215U FMY → FMY Jun 24, 21:29 UTCJun 24, 22:25 UTC55m
2026-06-24 N215U FMY → FMY Jun 24, 16:19 UTCJun 24, 17:05 UTC45m
2026-06-24 N215U - Jun 24, 13:40 UTCJun 24, 14:15 UTC35m
2026-06-24 N215U - Jun 24, 11:20 UTCJun 24, 12:25 UTC1h 5m

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 N215U page for operator, model, and routing details .

Mode-S A1CDD7 frequently asked

What is Mode-S code A1CDD7?
A1CDD7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N215U.
Where is Mode-S A1CDD7 registered?
Mode-S code A1CDD7 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 A1CDD7 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1CDD7, octal 50346727, decimal 10,603,991.
What flights does A1CDD7 operate?
Mode-S A1CDD7 has broadcast 1 distinct callsign, including N215U.