Apparatus

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sensors Mode-S transponder

A916CC

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N685LH · PIPER PA-28-140/150/160/180 · operated by CHRISTIANSEN AVIATION LLC

Hex
A916CC
Octal
52213314
Decimal
11,081,420
Country
US
Tail
N685LH
Type
P28A
No current signal · last broadcast 1d ago
Flights observed
9
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S A916CC.

Country allocation

The ICAO 24-bit address A916CC 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
LFA542 - 9 2026-04-13

Recent flights last 9

DateFlightRouteTakeoffLandingDuration
2026-04-13 LFA542 - Apr 13, 21:00 UTCApr 13, 23:40 UTC2h 40m
2026-04-13 LFA542 - Apr 13, 19:00 UTCApr 13, 19:40 UTC40m
2026-04-13 LFA542 - Apr 13, 17:40 UTCApr 13, 18:20 UTC40m
2026-04-13 LFA542 - Apr 13, 16:15 UTCApr 13, 16:30 UTC15m
2026-04-13 LFA542 - Apr 13, 15:50 UTCApr 13, 16:30 UTC40m
2026-04-13 LFA542 - Apr 13, 14:50 UTCApr 13, 16:15 UTC1h 25m
2026-04-13 LFA542 SFB → SFB Apr 13, 12:20 UTCApr 13, 13:20 UTC1h 0m
2026-04-13 LFA542 - Apr 13, 12:00 UTCApr 13, 12:15 UTC15m
2026-04-12 LFA542 SFB → SFB Apr 12, 17:20 UTCApr 12, 18:25 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 N685LH page for operator, model, and routing details .

Mode-S A916CC frequently asked

What is Mode-S code A916CC?
A916CC is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N685LH.
Where is Mode-S A916CC registered?
Mode-S code A916CC 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 A916CC broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A916CC, octal 52213314, decimal 11,081,420.
What flights does A916CC operate?
Mode-S A916CC has broadcast 1 distinct callsign, including LFA542.