Apparatus

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sensors Mode-S transponder

A99ACA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N718LL · operated by OWEN JON W

Hex
A99ACA
Octal
52315312
Decimal
11,115,210
Country
US
Tail
N718LL
No current signal · last broadcast Jul 23, 16:35 UTC
Flights observed
41
Distinct callsigns
1
Country
US
Last broadcast
Jul 23, 16:35 UTC

Last known position

Most recent position reported by Mode-S A99ACA.

Country allocation

The ICAO 24-bit address A99ACA 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
N718LL - 41 2026-07-23

Recent flights last 41

DateFlightRouteTakeoffLandingDuration
2026-07-23 N718LL - Jul 23, 13:15 UTCJul 23, 16:35 UTC3h 20m
2026-07-20 N718LL - Jul 20, 14:00 UTCJul 20, 15:00 UTC1h 0m
2026-07-20 N718LL - Jul 20, 11:40 UTCJul 20, 13:15 UTC1h 35m
2026-07-18 N718LL - Jul 18, 18:05 UTCJul 18, 19:30 UTC1h 25m
2026-07-18 N718LL - Jul 18, 14:45 UTCJul 18, 16:05 UTC1h 20m
2026-07-15 N718LL - Jul 15, 14:50 UTCJul 15, 15:25 UTC35m
2026-07-15 N718LL - Jul 15, 13:45 UTCJul 15, 14:20 UTC35m
2026-07-15 N718LL - Jul 15, 01:40 UTCJul 15, 02:00 UTC20m
2026-07-14 N718LL - Jul 14, 21:50 UTCJul 14, 22:05 UTC15m
2026-07-08 N718LL - Jul 8, 14:30 UTCJul 8, 14:45 UTC15m
2026-06-26 N718LL - Jun 26, 20:15 UTCJun 26, 20:29 UTC15m
2026-06-22 N718LL - Jun 22, 22:05 UTCJun 22, 23:05 UTC1h 0m
2026-06-14 N718LL - Jun 14, 21:25 UTCJun 14, 22:00 UTC35m
2026-06-14 N718LL - Jun 14, 17:40 UTCJun 14, 18:15 UTC35m
2026-06-05 N718LL - Jun 5, 19:55 UTCJun 5, 20:15 UTC20m
2026-06-05 N718LL - Jun 5, 01:20 UTCJun 5, 01:40 UTC20m
2026-06-04 N718LL - Jun 4, 20:45 UTCJun 4, 21:05 UTC20m
2026-05-25 N718LL - May 25, 19:44 UTCMay 25, 20:15 UTC30m
2026-05-16 N718LL - May 16, 21:45 UTCMay 16, 22:00 UTC15m
2026-05-16 N718LL - May 16, 20:50 UTCMay 16, 21:05 UTC15m
2026-05-16 N718LL - May 16, 19:30 UTCMay 16, 19:40 UTC10m
2026-05-15 N718LL - May 15, 18:30 UTCMay 15, 18:45 UTC15m
2026-05-13 N718LL - May 13, 19:10 UTCMay 13, 19:25 UTC15m
2026-05-13 N718LL - May 13, 16:35 UTCMay 13, 16:55 UTC20m
2026-05-13 N718LL - May 13, 13:40 UTCMay 13, 14:00 UTC20m
2026-05-10 N718LL - May 10, 19:05 UTCMay 10, 19:15 UTC10m
2026-05-10 N718LL - May 10, 14:45 UTCMay 10, 15:24 UTC40m
2026-05-08 N718LL - May 8, 01:24 UTCMay 8, 01:45 UTC20m
2026-05-07 N718LL - May 7, 21:05 UTCMay 7, 21:25 UTC20m
2026-05-03 N718LL - May 3, 22:30 UTCMay 3, 22:45 UTC15m
2026-05-02 N718LL - May 2, 18:45 UTCMay 2, 19:15 UTC30m
2026-05-02 N718LL - May 2, 13:40 UTCMay 2, 14:05 UTC25m
2026-05-01 N718LL - May 1, 22:45 UTCMay 1, 23:15 UTC30m
2026-04-30 N718LL - Apr 30, 21:20 UTCApr 30, 23:55 UTC2h 35m
2026-04-30 N718LL - Apr 30, 20:30 UTCApr 30, 20:45 UTC15m
2026-04-25 N718LL - Apr 25, 17:00 UTCApr 25, 17:20 UTC20m
2026-04-25 N718LL - Apr 25, 14:10 UTCApr 25, 14:25 UTC15m
2026-04-19 N718LL - Apr 19, 19:05 UTCApr 19, 21:05 UTC2h 0m
2026-04-19 N718LL - Apr 19, 14:35 UTCApr 19, 17:05 UTC2h 30m
2026-04-15 N718LL - Apr 15, 01:35 UTCApr 15, 01:55 UTC20m
2026-04-14 N718LL - Apr 14, 23:45 UTCApr 15, 00:05 UTC20m

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 N718LL page for operator, model, and routing details .

Mode-S A99ACA frequently asked

What is Mode-S code A99ACA?
A99ACA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N718LL.
Where is Mode-S A99ACA registered?
Mode-S code A99ACA 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 A99ACA broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 16:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A99ACA, octal 52315312, decimal 11,115,210.
What flights does A99ACA operate?
Mode-S A99ACA has broadcast 1 distinct callsign, including N718LL.