sensors Mode-S transponder

A1F853

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N226LP · operated by PAUL LETOURNEAU

Hex
A1F853
Octal
50374123
Decimal
10,614,867
Country
US
Tail
N226LP
No current signal · last broadcast 2h ago
Flights observed
5
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S A1F853.

Country allocation

The ICAO 24-bit address A1F853 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
N226LP - 5 2026-05-01

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-05-01 N226LP - May 1, 12:35 UTCMay 1, 13:20 UTC45m
2026-04-22 N226LP - Apr 22, 14:00 UTCApr 22, 15:40 UTC1h 40m
2026-04-22 N226LP - Apr 22, 11:25 UTCApr 22, 12:50 UTC1h 25m
2026-04-13 N226LP - Apr 13, 12:20 UTCApr 13, 12:35 UTC15m
2026-04-13 N226LP - Apr 13, 12:05 UTCApr 13, 12:15 UTC10m

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 N226LP page for operator, model, and routing details .

Mode-S A1F853 frequently asked

What is Mode-S code A1F853?
A1F853 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N226LP.
Where is Mode-S A1F853 registered?
Mode-S code A1F853 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 A1F853 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1F853, octal 50374123, decimal 10,614,867.
What flights does A1F853 operate?
Mode-S A1F853 has broadcast 1 distinct callsign, including N226LP.