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sensors Mode-S transponder

A550E5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N4411X · PIPER PA-28-140/150/160/180 · operated by MASTEN HANS C

Hex
A550E5
Octal
51250345
Decimal
10,834,149
Country
US
Tail
N4411X
Type
P28A
No current signal · last broadcast Jul 26, 18:20 UTC
Flights observed
136
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 18:20 UTC

Last known position

Most recent position reported by Mode-S A550E5.

Country allocation

The ICAO 24-bit address A550E5 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
N4411X - 136 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N4411X MYF → MYF Jul 26, 17:25 UTCJul 26, 18:20 UTC55m
2026-07-26 N4411X - Jul 26, 14:30 UTCJul 26, 16:00 UTC1h 30m
2026-07-25 N4411X - Jul 25, 16:20 UTCJul 25, 17:25 UTC1h 5m
2026-07-25 N4411X MYF → MYF Jul 25, 00:55 UTCJul 25, 02:50 UTC1h 55m
2026-07-24 N4411X MYF → MYF Jul 24, 20:40 UTCJul 24, 21:55 UTC1h 15m
2026-07-24 N4411X - Jul 24, 16:45 UTCJul 24, 17:45 UTC1h 0m
2026-07-23 N4411X - Jul 23, 22:50 UTCJul 23, 23:50 UTC1h 0m
2026-07-23 N4411X - Jul 23, 21:45 UTCJul 23, 22:05 UTC20m
2026-07-22 N4411X - Jul 22, 21:25 UTCJul 22, 22:05 UTC40m
2026-07-22 N4411X MYF → MYF Jul 22, 17:00 UTCJul 22, 18:25 UTC1h 25m
2026-07-21 N4411X - Jul 21, 21:30 UTCJul 21, 22:15 UTC45m
2026-07-21 N4411X RAL → SBD Jul 21, 21:00 UTCJul 21, 21:15 UTC15m
2026-07-21 N4411X MYF → RAL Jul 21, 19:45 UTCJul 21, 20:40 UTC55m
2026-07-21 N4411X - Jul 21, 17:35 UTCJul 21, 18:10 UTC35m
2026-07-21 N4411X - Jul 21, 16:45 UTCJul 21, 17:25 UTC40m
2026-07-20 N4411X MYF → MYF Jul 20, 23:30 UTCJul 21, 01:55 UTC2h 24m
2026-07-19 N4411X VNY → MYF Jul 19, 04:45 UTCJul 19, 06:00 UTC1h 15m
2026-07-19 N4411X - Jul 19, 03:20 UTCJul 19, 04:25 UTC1h 5m
2026-07-18 N4411X SMX → MYF Jul 18, 22:10 UTCJul 19, 00:10 UTC2h 0m
2026-07-18 N4411X - Jul 18, 17:45 UTCJul 18, 19:35 UTC1h 50m
2026-07-17 N4411X - Jul 17, 17:30 UTCJul 17, 18:25 UTC55m
2026-07-17 N4411X MYF → MYF Jul 17, 01:55 UTCJul 17, 02:54 UTC1h 0m
2026-07-16 N4411X - Jul 16, 21:40 UTCJul 16, 23:35 UTC1h 55m
2026-07-16 N4411X - Jul 16, 18:10 UTCJul 16, 20:05 UTC1h 55m
2026-07-16 N4411X - Jul 16, 01:15 UTCJul 16, 04:25 UTC3h 10m
2026-07-15 N4411X - Jul 15, 21:40 UTCJul 16, 00:05 UTC2h 25m
2026-07-15 N4411X - Jul 15, 20:25 UTCJul 15, 21:00 UTC35m
2026-07-15 N4411X MYF → MYF Jul 15, 17:25 UTCJul 15, 18:35 UTC1h 10m
2026-07-14 N4411X MYF → MYF Jul 14, 21:50 UTCJul 14, 23:50 UTC1h 59m
2026-07-14 N4411X HMT → MYF Jul 14, 20:00 UTCJul 14, 20:40 UTC40m
2026-07-14 N4411X MYF → HMT Jul 14, 19:10 UTCJul 14, 19:55 UTC45m
2026-07-14 N4411X - Jul 14, 01:40 UTCJul 14, 02:05 UTC25m
2026-07-13 N4411X MYF → MYF Jul 13, 22:55 UTCJul 13, 23:55 UTC1h 0m
2026-07-13 N4411X MYF → MYF Jul 13, 01:30 UTCJul 13, 02:15 UTC45m
2026-07-12 N4411X MYF → MYF Jul 12, 22:55 UTCJul 13, 00:30 UTC1h 35m
2026-07-12 N4411X MYF → MYF Jul 12, 19:50 UTCJul 12, 20:40 UTC50m
2026-07-12 N4411X MYF → MYF Jul 12, 17:01 UTCJul 12, 18:30 UTC1h 30m
2026-07-11 N4411X - Jul 11, 19:55 UTCJul 11, 21:20 UTC1h 25m
2026-07-11 N4411X - Jul 11, 15:40 UTCJul 11, 16:45 UTC1h 5m
2026-07-11 N4411X - Jul 11, 01:20 UTCJul 11, 02:10 UTC50m
2026-07-10 N4411X - Jul 10, 21:35 UTCJul 10, 23:00 UTC1h 25m
2026-07-10 N4411X - Jul 10, 17:55 UTCJul 10, 19:25 UTC1h 30m
2026-07-10 N4411X - Jul 10, 03:50 UTCJul 10, 04:35 UTC45m
2026-07-10 N4411X - Jul 10, 03:15 UTCJul 10, 03:40 UTC25m
2026-07-09 N4411X - Jul 9, 23:05 UTCJul 10, 01:15 UTC2h 10m
2026-07-09 N4411X - Jul 9, 19:50 UTCJul 9, 22:10 UTC2h 20m
2026-07-09 N4411X MYF → MYF Jul 9, 17:45 UTCJul 9, 18:45 UTC1h 0m
2026-07-08 N4411X - Jul 8, 18:40 UTCJul 8, 20:05 UTC1h 25m
2026-07-07 N4411X - Jul 7, 21:00 UTCJul 8, 00:10 UTC3h 10m
2026-07-06 N4411X - Jul 6, 19:30 UTCJul 6, 21:00 UTC1h 30m

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 N4411X page for operator, model, and routing details .

Mode-S A550E5 frequently asked

What is Mode-S code A550E5?
A550E5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N4411X.
Where is Mode-S A550E5 registered?
Mode-S code A550E5 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 A550E5 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A550E5, octal 51250345, decimal 10,834,149.
What flights does A550E5 operate?
Mode-S A550E5 has broadcast 1 distinct callsign, including N4411X.