Apparatus

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sensors Mode-S transponder

A45FEA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N381KH · MOONEY M-20 · operated by PHOENIX FIRE PROTECTION LLC

Hex
A45FEA
Octal
51057752
Decimal
10,772,458
Country
US
Tail
N381KH
Type
M20P
No current signal · last broadcast Jul 13, 22:35 UTC
Flights observed
21
Distinct callsigns
1
Country
US
Last broadcast
Jul 13, 22:35 UTC

Last known position

Most recent position reported by Mode-S A45FEA.

Country allocation

The ICAO 24-bit address A45FEA 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
N381KH - 21 2026-07-13

Recent flights last 21

DateFlightRouteTakeoffLandingDuration
2026-07-13 N381KH - Jul 13, 22:15 UTCJul 13, 22:35 UTC20m
2026-07-13 N381KH - Jul 13, 17:30 UTCJul 13, 17:50 UTC20m
2026-07-13 N381KH - Jul 13, 15:30 UTCJul 13, 15:45 UTC15m
2026-07-13 N381KH - Jul 13, 13:25 UTCJul 13, 13:45 UTC20m
2026-07-09 N381KH - Jul 9, 22:10 UTCJul 9, 22:30 UTC20m
2026-07-09 N381KH - Jul 9, 11:10 UTCJul 9, 11:30 UTC20m
2026-06-24 N381KH - Jun 24, 22:29 UTCJun 24, 22:49 UTC20m
2026-06-24 N381KH - Jun 24, 12:30 UTCJun 24, 12:54 UTC25m
2026-06-17 N381KH - Jun 17, 14:05 UTCJun 17, 14:15 UTC10m
2026-06-17 N381KH - Jun 17, 12:35 UTCJun 17, 12:50 UTC15m
2026-05-30 N381KH - May 30, 23:35 UTCMay 30, 23:45 UTC10m
2026-05-30 N381KH - May 30, 18:20 UTCMay 30, 18:40 UTC20m
2026-05-28 N381KH - May 28, 16:40 UTCMay 28, 16:50 UTC10m
2026-05-28 N381KH - May 28, 13:40 UTCMay 28, 13:55 UTC15m
2026-05-20 N381KH - May 20, 00:35 UTCMay 20, 00:45 UTC10m
2026-05-19 N381KH - May 19, 23:00 UTCMay 19, 23:45 UTC45m
2026-05-18 N381KH - May 18, 14:55 UTCMay 18, 15:40 UTC45m
2026-05-18 N381KH - May 18, 13:45 UTCMay 18, 14:05 UTC20m
2026-05-16 N381KH - May 16, 23:20 UTCMay 16, 23:35 UTC15m
2026-05-16 N381KH - May 16, 17:25 UTCMay 16, 17:45 UTC20m
2026-05-04 N381KH - May 4, 23:10 UTCMay 4, 23:20 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 N381KH page for operator, model, and routing details .

Mode-S A45FEA frequently asked

What is Mode-S code A45FEA?
A45FEA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N381KH.
Where is Mode-S A45FEA registered?
Mode-S code A45FEA 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 A45FEA broadcasting right now?
No active broadcast right now. Last signal was Jul 13, 22:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A45FEA, octal 51057752, decimal 10,772,458.
What flights does A45FEA operate?
Mode-S A45FEA has broadcast 1 distinct callsign, including N381KH.