Apparatus

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sensors Mode-S transponder

A6901B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5218F · CESSNA 172 Skyhawk · operated by MACMILLAN PERFORMANCE LLC

Hex
A6901B
Octal
51510033
Decimal
10,915,867
Country
US
Tail
N5218F
Type
C172
No current signal · last broadcast 12h ago
Flights observed
78
Distinct callsigns
1
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S A6901B.

Country allocation

The ICAO 24-bit address A6901B 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
N5218F - 78 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 N5218F - Jul 13, 22:40 UTCJul 13, 23:45 UTC1h 5m
2026-07-13 N5218F TOA → TOA Jul 13, 20:45 UTCJul 13, 21:35 UTC50m
2026-07-13 N5218F - Jul 13, 17:55 UTCJul 13, 18:40 UTC45m
2026-07-12 N5218F SPQ → TOA Jul 12, 21:50 UTCJul 12, 22:50 UTC1h 0m
2026-07-11 N5218F LPC → TOA Jul 11, 22:05 UTCJul 11, 23:25 UTC1h 20m
2026-07-11 N5218F TOA → LPC Jul 11, 19:25 UTCJul 11, 20:35 UTC1h 10m
2026-07-10 N5218F - Jul 10, 21:30 UTCJul 10, 22:35 UTC1h 5m
2026-07-10 N5218F TOA → TOA Jul 10, 19:40 UTCJul 10, 20:40 UTC1h 0m
2026-07-10 N5218F - Jul 10, 18:05 UTCJul 10, 18:40 UTC35m
2026-07-10 N5218F TOA → TOA Jul 10, 16:00 UTCJul 10, 16:50 UTC50m
2026-07-09 N5218F TOA → TOA Jul 9, 19:45 UTCJul 9, 20:35 UTC50m
2026-07-09 N5218F TOA → TOA Jul 9, 17:35 UTCJul 9, 18:35 UTC1h 0m
2026-07-08 N5218F - Jul 8, 22:05 UTCJul 8, 22:55 UTC50m
2026-07-08 N5218F AVX → TOA Jul 8, 20:35 UTCJul 8, 21:00 UTC25m
2026-07-08 N5218F - Jul 8, 19:40 UTCJul 8, 20:00 UTC20m
2026-07-08 N5218F - Jul 8, 17:55 UTCJul 8, 18:40 UTC45m
2026-07-07 N5218F TOA → TOA Jul 7, 22:55 UTCJul 7, 23:30 UTC35m
2026-07-07 N5218F - Jul 7, 19:35 UTCJul 7, 20:35 UTC1h 0m
2026-07-07 N5218F - Jul 7, 17:55 UTCJul 7, 18:40 UTC45m
2026-07-05 N5218F - Jul 5, 23:40 UTCJul 6, 01:35 UTC1h 55m
2026-07-04 N5218F - Jul 4, 18:40 UTCJul 4, 19:20 UTC40m
2026-07-03 N5218F - Jul 3, 23:45 UTCJul 4, 00:40 UTC55m
2026-07-03 N5218F TOA → TOA Jul 3, 00:05 UTCJul 3, 00:40 UTC35m
2026-07-02 N5218F TOA → TOA Jul 2, 23:45 UTCJul 2, 23:55 UTC10m
2026-07-02 N5218F - Jul 2, 21:45 UTCJul 2, 22:35 UTC50m
2026-07-02 N5218F - Jul 2, 19:55 UTCJul 2, 21:00 UTC1h 5m
2026-07-02 N5218F - Jul 2, 17:50 UTCJul 2, 18:45 UTC55m
2026-07-01 N5218F TOA → TOA Jul 1, 21:40 UTCJul 1, 23:10 UTC1h 30m
2026-07-01 N5218F TOA → TOA Jul 1, 03:50 UTCJul 1, 05:10 UTC1h 20m
2026-06-30 N5218F TOA → TOA Jun 30, 21:35 UTCJun 30, 22:30 UTC55m
2026-06-30 N5218F - Jun 30, 19:35 UTCJun 30, 20:40 UTC1h 5m
2026-06-30 N5218F - Jun 30, 18:00 UTCJun 30, 18:40 UTC40m
2026-06-29 N5218F - Jun 29, 23:09 UTCJun 30, 00:00 UTC50m
2026-06-28 N5218F TOA → TOA Jun 28, 22:10 UTCJun 28, 22:45 UTC35m
2026-06-28 N5218F - Jun 28, 19:49 UTCJun 28, 20:45 UTC55m
2026-06-28 N5218F TOA → TOA Jun 28, 17:55 UTCJun 28, 18:44 UTC50m
2026-06-27 N5218F CPM → TOA Jun 27, 21:50 UTCJun 27, 22:49 UTC1h 0m
2026-06-26 N5218F - Jun 26, 21:39 UTCJun 26, 22:49 UTC1h 10m
2026-06-26 N5218F TOA → TOA Jun 26, 17:44 UTCJun 26, 18:49 UTC1h 5m
2026-06-25 N5218F - Jun 25, 21:40 UTCJun 25, 22:34 UTC55m
2026-06-25 N5218F TOA → TOA Jun 25, 19:49 UTCJun 25, 20:34 UTC45m
2026-06-25 N5218F TOA → TOA Jun 25, 17:44 UTCJun 25, 18:10 UTC25m
2026-06-24 N5218F - Jun 24, 21:34 UTCJun 24, 22:49 UTC1h 15m
2026-06-24 N5218F TOA → TOA Jun 24, 18:50 UTCJun 24, 19:49 UTC1h 0m
2026-06-24 N5218F TOA → TOA Jun 24, 03:55 UTCJun 24, 05:09 UTC1h 15m
2026-06-23 N5218F TOA → TOA Jun 23, 21:45 UTCJun 23, 23:29 UTC1h 45m
2026-06-23 N5218F TOA → TOA Jun 23, 19:39 UTCJun 23, 20:49 UTC1h 10m
2026-06-22 N5218F - Jun 22, 19:44 UTCJun 22, 20:44 UTC1h 0m
2026-06-20 N5218F - Jun 20, 22:00 UTCJun 20, 22:54 UTC55m
2026-06-20 N5218F - Jun 20, 19:04 UTCJun 20, 19:34 UTC30m

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 N5218F page for operator, model, and routing details .

Mode-S A6901B frequently asked

What is Mode-S code A6901B?
A6901B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5218F.
Where is Mode-S A6901B registered?
Mode-S code A6901B 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 A6901B broadcasting right now?
No active broadcast right now. Last signal was 12h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6901B, octal 51510033, decimal 10,915,867.
What flights does A6901B operate?
Mode-S A6901B has broadcast 1 distinct callsign, including N5218F.