Apparatus

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sensors Mode-S transponder

ACEB1B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N931TT · PIPER PA-46-310/350 · operated by COMPASS PRO LLC

Hex
ACEB1B
Octal
53165433
Decimal
11,332,379
Country
US
Tail
N931TT
Type
PA46
No current signal · last broadcast 1d ago
Flights observed
21
Distinct callsigns
1
Country
US
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S ACEB1B.

Country allocation

The ICAO 24-bit address ACEB1B 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
N931TT - 21 2026-07-19

Recent flights last 21

DateFlightRouteTakeoffLandingDuration
2026-07-19 N931TT - Jul 19, 15:15 UTCJul 19, 16:00 UTC45m
2026-07-19 N931TT - Jul 19, 12:10 UTCJul 19, 12:50 UTC40m
2026-07-17 N931TT - Jul 17, 14:00 UTCJul 17, 14:10 UTC10m
2026-07-10 N931TT - Jul 10, 00:10 UTCJul 10, 00:45 UTC35m
2026-07-09 N931TT - Jul 9, 22:10 UTCJul 9, 22:40 UTC30m
2026-06-12 N931TT - Jun 12, 18:01 UTCJun 12, 18:15 UTC15m
2026-06-12 N931TT - Jun 12, 17:20 UTCJun 12, 17:30 UTC10m
2026-06-07 N931TT - Jun 7, 20:50 UTCJun 7, 21:25 UTC35m
2026-06-07 N931TT - Jun 7, 11:45 UTCJun 7, 12:20 UTC35m
2026-06-06 N931TT - Jun 6, 14:54 UTCJun 6, 15:10 UTC15m
2026-06-06 N931TT - Jun 6, 12:54 UTCJun 6, 13:05 UTC10m
2026-06-05 N931TT - Jun 5, 00:40 UTCJun 5, 01:40 UTC1h 0m
2026-06-04 N931TT - Jun 4, 21:15 UTCJun 4, 22:25 UTC1h 10m
2026-04-24 N931TT - Apr 24, 14:55 UTCApr 24, 15:05 UTC10m
2026-04-24 N931TT - Apr 24, 13:40 UTCApr 24, 14:10 UTC30m
2026-04-24 N931TT - Apr 24, 12:35 UTCApr 24, 13:00 UTC25m
2026-04-21 N931TT - Apr 21, 17:01 UTCApr 21, 17:10 UTC10m
2026-04-21 N931TT - Apr 21, 16:05 UTCApr 21, 16:20 UTC15m
2026-04-16 N931TT - Apr 16, 21:24 UTCApr 16, 23:10 UTC1h 45m
2026-04-16 N931TT - Apr 16, 19:30 UTCApr 16, 20:45 UTC1h 15m
2026-04-13 N931TT - Apr 13, 20:35 UTCApr 13, 23:30 UTC2h 55m

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 N931TT page for operator, model, and routing details .

Mode-S ACEB1B frequently asked

What is Mode-S code ACEB1B?
ACEB1B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N931TT.
Where is Mode-S ACEB1B registered?
Mode-S code ACEB1B 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 ACEB1B 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 ACEB1B, octal 53165433, decimal 11,332,379.
What flights does ACEB1B operate?
Mode-S ACEB1B has broadcast 1 distinct callsign, including N931TT.