Apparatus

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sensors Mode-S transponder

AAAAAA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N787BK · BS115-BK160 · operated by AMERI AIRCRAFT SALES AND SERVICE LLC

Hex
AAAAAA
Octal
52525252
Decimal
11,184,810
Country
US
Tail
N787BK
Type
PRIM
No current signal · last broadcast 6d ago
Flights observed
48
Distinct callsigns
5
Country
US
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S AAAAAA.

Country allocation

The ICAO 24-bit address AAAAAA 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 5 distinct

Callsign Airline Flights Last seen
ABCD - 25 2026-07-11
OKLUR22 - 16 2026-07-11
CILZG - 5 2026-06-29
VOLP514 - 1 2026-06-21
N787BK - 1 2026-06-17

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-07-11 ABCD - Jul 11, 16:30 UTCJul 11, 17:25 UTC55m
2026-07-11 ABCD - Jul 11, 14:40 UTCJul 11, 14:50 UTC10m
2026-07-11 ABCD - Jul 11, 13:55 UTCJul 11, 14:05 UTC10m
2026-07-11 ABCD - Jul 11, 12:15 UTCJul 11, 13:20 UTC1h 5m
2026-07-11 OKLUR22 - Jul 11, 05:50 UTCJul 11, 06:45 UTC55m
2026-07-10 OKLUR22 - Jul 10, 12:15 UTCJul 10, 12:30 UTC15m
2026-07-04 ABCD - Jul 4, 11:55 UTCJul 4, 12:15 UTC20m
2026-07-04 ABCD - Jul 4, 10:35 UTCJul 4, 10:45 UTC10m
2026-06-29 CILZG - Jun 29, 16:15 UTCJun 29, 16:29 UTC15m
2026-06-29 CILZG - Jun 29, 14:39 UTCJun 29, 14:50 UTC10m
2026-06-28 ABCD - Jun 28, 15:44 UTCJun 28, 16:00 UTC15m
2026-06-28 ABCD - Jun 28, 14:39 UTCJun 28, 14:54 UTC15m
2026-06-28 ABCD - Jun 28, 10:55 UTCJun 28, 11:59 UTC1h 5m
2026-06-27 ABCD - Jun 27, 14:49 UTCJun 27, 15:19 UTC30m
2026-06-27 ABCD - Jun 27, 12:09 UTCJun 27, 12:25 UTC15m
2026-06-25 CILZG - Jun 25, 16:55 UTCJun 25, 17:20 UTC25m
2026-06-21 VOLP514 - Jun 21, 07:04 UTCJun 21, 07:49 UTC45m
2026-06-20 ABCD - Jun 20, 14:59 UTCJun 20, 15:34 UTC35m
2026-06-18 OKLUR22 - Jun 18, 06:30 UTCJun 18, 06:45 UTC15m
2026-06-17 OKLUR22 - Jun 17, 17:00 UTCJun 17, 18:10 UTC1h 10m
2026-06-17 N787BK - Jun 17, 08:15 UTCJun 17, 09:40 UTC1h 25m
2026-06-06 OKLUR22 - Jun 6, 13:34 UTCJun 6, 14:09 UTC35m
2026-06-06 OKLUR22 - Jun 6, 12:20 UTCJun 6, 13:20 UTC1h 0m
2026-06-06 OKLUR22 - Jun 6, 07:25 UTCJun 6, 08:35 UTC1h 10m
2026-06-06 OKLUR22 - Jun 6, 06:00 UTCJun 6, 06:40 UTC40m
2026-06-05 CILZG - Jun 5, 23:15 UTCJun 5, 23:50 UTC35m
2026-06-04 OKLUR22 - Jun 4, 14:45 UTCJun 4, 16:00 UTC1h 15m
2026-06-02 OKLUR22 - Jun 2, 06:25 UTCJun 2, 06:35 UTC10m
2026-05-30 ABCD - May 30, 14:05 UTCMay 30, 17:40 UTC3h 35m
2026-05-30 ABCD - May 30, 13:20 UTCMay 30, 13:35 UTC15m
2026-05-30 ABCD - May 30, 11:25 UTCMay 30, 12:30 UTC1h 5m
2026-05-24 OKLUR22 - May 24, 17:25 UTCMay 24, 17:35 UTC10m
2026-05-20 OKLUR22 - May 20, 08:45 UTCMay 20, 09:00 UTC15m
2026-05-19 OKLUR22 - May 19, 16:10 UTCMay 19, 16:20 UTC10m
2026-05-19 OKLUR22 - May 19, 12:35 UTCMay 19, 12:45 UTC10m
2026-05-19 OKLUR22 - May 19, 10:35 UTCMay 19, 10:50 UTC15m
2026-05-16 ABCD - May 16, 12:40 UTCMay 16, 15:20 UTC2h 40m
2026-05-16 ABCD - May 16, 10:05 UTCMay 16, 11:16 UTC1h 10m
2026-05-15 CILZG - May 15, 17:00 UTCMay 15, 17:25 UTC25m
2026-05-09 ABCD - May 9, 16:10 UTCMay 9, 16:40 UTC30m
2026-05-09 ABCD - May 9, 15:00 UTCMay 9, 15:30 UTC30m
2026-05-09 ABCD - May 9, 11:30 UTCMay 9, 11:40 UTC10m
2026-04-25 ABCD - Apr 25, 11:25 UTCApr 25, 14:50 UTC3h 25m
2026-04-19 ABCD - Apr 19, 16:45 UTCApr 19, 17:20 UTC35m
2026-04-19 ABCD - Apr 19, 15:25 UTCApr 19, 15:45 UTC20m
2026-04-18 ABCD - Apr 18, 16:30 UTCApr 18, 17:45 UTC1h 15m
2026-04-18 OKLUR22 - Apr 18, 14:00 UTCApr 18, 15:30 UTC1h 30m
2026-04-18 ABCD - Apr 18, 10:15 UTCApr 18, 10:50 UTC35m

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 N787BK page for operator, model, and routing details .

Mode-S AAAAAA frequently asked

What is Mode-S code AAAAAA?
AAAAAA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N787BK.
Where is Mode-S AAAAAA registered?
Mode-S code AAAAAA 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 AAAAAA broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAAAAA, octal 52525252, decimal 11,184,810.
What flights does AAAAAA operate?
Mode-S AAAAAA has broadcast 5 distinct callsigns, including ABCD, OKLUR22, CILZG, VOLP514, N787BK.