Apparatus

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sensors Mode-S transponder

A90BA7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N682LH · PIPER PA-28-140/150/160/180 · operated by CHRISTIANSEN AVIATION LLC

Hex
A90BA7
Octal
52205647
Decimal
11,078,567
Country
US
Tail
N682LH
Type
P28A
No current signal · last broadcast 23h ago
Flights observed
10
Distinct callsigns
1
Country
US
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S A90BA7.

Country allocation

The ICAO 24-bit address A90BA7 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
LFA539 - 10 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-13 LFA539 - Apr 13, 22:00 UTCApr 13, 23:45 UTC1h 45m
2026-04-13 LFA539 - Apr 13, 19:50 UTCApr 13, 20:15 UTC25m
2026-04-13 LFA539 - Apr 13, 19:30 UTCApr 13, 20:10 UTC40m
2026-04-13 LFA539 - Apr 13, 17:40 UTCApr 13, 18:30 UTC50m
2026-04-13 LFA539 - Apr 13, 16:15 UTCApr 13, 17:00 UTC45m
2026-04-13 LFA539 - Apr 13, 16:00 UTCApr 13, 16:15 UTC15m
2026-04-13 LFA539 - Apr 13, 14:15 UTCApr 13, 15:05 UTC50m
2026-04-13 LFA539 - Apr 13, 12:20 UTCApr 13, 13:05 UTC45m
2026-04-13 LFA539 - Apr 13, 11:45 UTCApr 13, 12:15 UTC30m
2026-04-12 LFA539 SFB → SFB Apr 12, 17:25 UTCApr 12, 18:05 UTC40m

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 N682LH page for operator, model, and routing details .

Mode-S A90BA7 frequently asked

What is Mode-S code A90BA7?
A90BA7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N682LH.
Where is Mode-S A90BA7 registered?
Mode-S code A90BA7 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 A90BA7 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A90BA7, octal 52205647, decimal 11,078,567.
What flights does A90BA7 operate?
Mode-S A90BA7 has broadcast 1 distinct callsign, including LFA539.