Apparatus

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sensors Mode-S transponder

A9994A

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N7176T · operated by ROBERT MICHAEL RABE

Hex
A9994A
Octal
52314512
Decimal
11,114,826
Country
US
Tail
N7176T
No current signal · last broadcast Jul 25, 00:40 UTC
Flights observed
51
Distinct callsigns
1
Country
US
Last broadcast
Jul 25, 00:40 UTC

Last known position

Most recent position reported by Mode-S A9994A.

Country allocation

The ICAO 24-bit address A9994A 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
N7176T - 51 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 N7176T - Jul 24, 23:40 UTCJul 25, 00:40 UTC1h 0m
2026-07-24 N7176T - Jul 24, 16:15 UTCJul 24, 16:55 UTC40m
2026-07-13 N7176T LVK → SAC Jul 13, 23:40 UTCJul 14, 00:15 UTC35m
2026-07-13 N7176T - Jul 13, 18:15 UTCJul 13, 19:10 UTC55m
2026-07-13 N7176T SAC → LVK Jul 13, 15:45 UTCJul 13, 16:30 UTC45m
2026-07-13 N7176T OAK → SAC Jul 13, 04:30 UTCJul 13, 05:15 UTC45m
2026-07-12 N7176T SAC → OAK Jul 12, 13:55 UTCJul 12, 14:45 UTC50m
2026-06-17 N7176T - Jun 17, 02:00 UTCJun 17, 02:35 UTC35m
2026-06-16 N7176T - Jun 16, 14:25 UTCJun 16, 15:45 UTC1h 20m
2026-06-12 N7176T - Jun 12, 23:45 UTCJun 13, 00:20 UTC35m
2026-06-12 N7176T - Jun 12, 16:30 UTCJun 12, 17:25 UTC55m
2026-06-12 N7176T OAK → SAC Jun 12, 00:00 UTCJun 12, 00:50 UTC51m
2026-06-11 N7176T SAC → OAK Jun 11, 14:30 UTCJun 11, 15:15 UTC45m
2026-06-08 N7176T - Jun 8, 21:40 UTCJun 8, 22:15 UTC35m
2026-06-08 N7176T - Jun 8, 19:25 UTCJun 8, 20:20 UTC55m
2026-06-05 N7176T - Jun 5, 22:55 UTCJun 5, 23:30 UTC35m
2026-06-05 N7176T - Jun 5, 17:20 UTCJun 5, 17:55 UTC35m
2026-05-29 N7176T - May 29, 23:30 UTCMay 30, 00:10 UTC40m
2026-05-29 N7176T - May 29, 17:30 UTCMay 29, 18:10 UTC40m
2026-05-27 N7176T - May 27, 21:25 UTCMay 27, 22:05 UTC40m
2026-05-27 N7176T - May 27, 17:55 UTCMay 27, 18:40 UTC45m
2026-05-26 N7176T - May 26, 21:49 UTCMay 26, 22:35 UTC45m
2026-05-26 N7176T - May 26, 18:10 UTCMay 26, 19:25 UTC1h 15m
2026-05-23 N7176T - May 23, 21:10 UTCMay 23, 21:55 UTC45m
2026-05-23 N7176T - May 23, 18:25 UTCMay 23, 19:05 UTC40m
2026-05-23 N7176T SAC → SAC May 23, 16:30 UTCMay 23, 16:45 UTC15m
2026-05-23 N7176T - May 23, 02:35 UTCMay 23, 02:50 UTC15m
2026-05-23 N7176T - May 23, 01:25 UTCMay 23, 01:55 UTC30m
2026-05-22 N7176T - May 22, 16:20 UTCMay 22, 16:35 UTC15m
2026-05-21 N7176T - May 21, 02:00 UTCMay 21, 02:25 UTC25m
2026-05-20 N7176T - May 20, 13:55 UTCMay 20, 14:15 UTC20m
2026-05-20 N7176T - May 20, 00:40 UTCMay 20, 00:55 UTC15m
2026-05-19 N7176T - May 19, 15:30 UTCMay 19, 16:00 UTC30m
2026-05-15 N7176T - May 15, 21:25 UTCMay 15, 22:10 UTC45m
2026-05-15 N7176T - May 15, 16:00 UTCMay 15, 16:40 UTC40m
2026-05-09 N7176T - May 9, 23:25 UTCMay 10, 00:05 UTC40m
2026-05-09 N7176T SAC → LVK May 9, 15:35 UTCMay 9, 16:10 UTC35m
2026-05-08 N7176T - May 8, 22:05 UTCMay 8, 22:45 UTC40m
2026-05-08 N7176T - May 8, 16:40 UTCMay 8, 17:20 UTC40m
2026-05-07 N7176T - May 7, 19:50 UTCMay 7, 21:30 UTC1h 40m
2026-05-07 N7176T - May 7, 16:30 UTCMay 7, 17:35 UTC1h 5m
2026-05-04 N7176T - May 4, 22:00 UTCMay 4, 22:35 UTC35m
2026-05-04 N7176T - May 4, 19:15 UTCMay 4, 19:50 UTC35m
2026-05-02 N7176T - May 2, 22:40 UTCMay 2, 23:10 UTC30m
2026-05-02 N7176T - May 2, 15:40 UTCMay 2, 16:15 UTC35m
2026-05-01 N7176T - May 1, 23:50 UTCMay 2, 00:25 UTC35m
2026-05-01 N7176T - May 1, 15:35 UTCMay 1, 16:40 UTC1h 5m
2026-04-29 N7176T SAC → SAC Apr 29, 20:00 UTCApr 29, 21:35 UTC1h 35m
2026-04-14 N7176T - Apr 14, 21:25 UTCApr 14, 21:40 UTC15m
2026-04-14 N7176T - Apr 14, 17:20 UTCApr 14, 17:40 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 N7176T page for operator, model, and routing details .

Mode-S A9994A frequently asked

What is Mode-S code A9994A?
A9994A is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N7176T.
Where is Mode-S A9994A registered?
Mode-S code A9994A 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 A9994A broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 00:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9994A, octal 52314512, decimal 11,114,826.
What flights does A9994A operate?
Mode-S A9994A has broadcast 1 distinct callsign, including N7176T.