Apparatus

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sensors Mode-S transponder

A66411

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5102D · CESSNA 172 Skyhawk · operated by B & R AIRCRAFT LLC

Hex
A66411
Octal
51462021
Decimal
10,904,593
Country
US
Tail
N5102D
Type
C172
Broadcasting now · callsign N5102D · 2,025 ft
Flights observed
223
Distinct callsigns
1
Country
US
Last broadcast
22m ago

Current position

A66411 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A66411 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
N5102D - 223 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 N5102D - Jul 14, 13:40 UTCJul 14, 14:15 UTC35m
2026-07-14 N5102D - Jul 14, 03:25 UTCJul 14, 04:25 UTC1h 0m
2026-07-14 N5102D - Jul 14, 01:40 UTCJul 14, 02:10 UTC30m
2026-07-13 N5102D - Jul 13, 23:55 UTCJul 14, 00:55 UTC1h 0m
2026-07-13 N5102D - Jul 13, 21:35 UTCJul 13, 22:10 UTC35m
2026-07-13 N5102D - Jul 13, 19:45 UTCJul 13, 20:45 UTC1h 0m
2026-07-13 N5102D - Jul 13, 17:20 UTCJul 13, 18:35 UTC1h 15m
2026-07-13 N5102D - Jul 13, 15:25 UTCJul 13, 16:00 UTC35m
2026-07-13 N5102D - Jul 13, 12:40 UTCJul 13, 13:55 UTC1h 15m
2026-07-12 N5102D - Jul 12, 22:10 UTCJul 13, 00:30 UTC2h 20m
2026-07-12 N5102D - Jul 12, 19:50 UTCJul 12, 20:45 UTC55m
2026-07-12 N5102D - Jul 12, 17:50 UTCJul 12, 18:45 UTC55m
2026-07-12 N5102D - Jul 12, 15:30 UTCJul 12, 16:50 UTC1h 20m
2026-07-12 N5102D - Jul 12, 12:45 UTCJul 12, 13:50 UTC1h 5m
2026-07-11 N5102D - Jul 11, 17:30 UTCJul 11, 18:35 UTC1h 5m
2026-07-11 N5102D - Jul 11, 15:30 UTCJul 11, 16:50 UTC1h 20m
2026-07-10 N5102D - Jul 10, 15:40 UTCJul 10, 15:50 UTC10m
2026-07-09 N5102D - Jul 9, 12:40 UTCJul 9, 13:55 UTC1h 15m
2026-07-08 N5102D - Jul 8, 19:35 UTCJul 8, 20:50 UTC1h 15m
2026-07-08 N5102D - Jul 8, 16:25 UTCJul 8, 17:40 UTC1h 15m
2026-07-08 N5102D - Jul 8, 13:55 UTCJul 8, 14:55 UTC1h 0m
2026-07-07 N5102D - Jul 7, 19:40 UTCJul 7, 20:50 UTC1h 10m
2026-07-05 N5102D - Jul 5, 01:40 UTCJul 5, 02:50 UTC1h 10m
2026-07-04 N5102D - Jul 4, 18:00 UTCJul 4, 18:40 UTC40m
2026-07-04 N5102D - Jul 4, 12:50 UTCJul 4, 14:40 UTC1h 50m
2026-07-03 N5102D - Jul 3, 21:10 UTCJul 3, 21:30 UTC20m
2026-07-03 N5102D - Jul 3, 19:05 UTCJul 3, 20:20 UTC1h 15m
2026-07-03 N5102D - Jul 3, 16:40 UTCJul 3, 17:40 UTC1h 0m
2026-07-03 N5102D - Jul 3, 14:55 UTCJul 3, 15:50 UTC55m
2026-07-03 N5102D - Jul 3, 11:55 UTCJul 3, 13:40 UTC1h 45m
2026-07-03 N5102D - Jul 3, 03:45 UTCJul 3, 05:45 UTC2h 0m
2026-07-02 N5102D - Jul 2, 23:25 UTCJul 3, 00:45 UTC1h 20m
2026-07-02 N5102D - Jul 2, 21:30 UTCJul 2, 22:35 UTC1h 5m
2026-07-02 N5102D - Jul 2, 19:35 UTCJul 2, 20:55 UTC1h 20m
2026-07-02 N5102D - Jul 2, 16:50 UTCJul 2, 17:45 UTC55m
2026-07-02 N5102D - Jul 2, 15:00 UTCJul 2, 16:10 UTC1h 10m
2026-07-02 N5102D - Jul 2, 12:25 UTCJul 2, 13:50 UTC1h 25m
2026-07-01 N5102D - Jul 1, 23:05 UTCJul 2, 00:15 UTC1h 10m
2026-07-01 N5102D - Jul 1, 20:35 UTCJul 1, 22:25 UTC1h 50m
2026-07-01 N5102D - Jul 1, 18:40 UTCJul 1, 19:50 UTC1h 10m
2026-07-01 N5102D - Jul 1, 14:55 UTCJul 1, 16:00 UTC1h 5m
2026-07-01 N5102D - Jul 1, 12:50 UTCJul 1, 13:55 UTC1h 5m
2026-07-01 N5102D - Jul 1, 02:10 UTCJul 1, 04:45 UTC2h 35m
2026-06-30 N5102D - Jun 30, 21:25 UTCJun 30, 22:40 UTC1h 15m
2026-06-30 N5102D - Jun 30, 16:35 UTCJun 30, 17:25 UTC50m
2026-06-30 N5102D - Jun 30, 03:25 UTCJun 30, 03:45 UTC20m
2026-06-30 N5102D - Jun 30, 01:50 UTCJun 30, 02:10 UTC20m
2026-06-29 N5102D - Jun 29, 22:44 UTCJun 30, 00:04 UTC1h 20m
2026-06-29 N5102D - Jun 29, 18:34 UTCJun 29, 19:29 UTC55m
2026-06-29 N5102D - Jun 29, 16:29 UTCJun 29, 17:45 UTC1h 15m

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 N5102D page for operator, model, and routing details .

Mode-S A66411 frequently asked

What is Mode-S code A66411?
A66411 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5102D.
Where is Mode-S A66411 registered?
Mode-S code A66411 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 A66411 broadcasting right now?
Yes. Mode-S A66411 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A66411, octal 51462021, decimal 10,904,593.
What flights does A66411 operate?
Mode-S A66411 has broadcast 1 distinct callsign, including N5102D.