Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A66BC3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N5124B · CESSNA 152 · operated by HILLSBORO AERO ACADEMY LLCC

Hex
A66BC3
Octal
51465703
Decimal
10,906,563
Country
US
Tail
N5124B
Type
C152
No current signal · last broadcast 12h ago
Flights observed
219
Distinct callsigns
1
Country
US
Last broadcast
12h ago

Last known position

Most recent position reported by Mode-S A66BC3.

Country allocation

The ICAO 24-bit address A66BC3 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
N5124B - 219 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 N5124B - Jul 21, 03:00 UTCJul 21, 03:35 UTC35m
2026-07-21 N5124B - Jul 21, 00:55 UTCJul 21, 01:25 UTC30m
2026-07-20 N5124B - Jul 20, 21:50 UTCJul 20, 22:10 UTC20m
2026-07-20 N5124B - Jul 20, 18:45 UTCJul 20, 19:05 UTC20m
2026-07-19 N5124B HIO → HIO Jul 19, 19:40 UTCJul 19, 21:10 UTC1h 30m
2026-07-19 N5124B - Jul 19, 13:30 UTCJul 19, 15:10 UTC1h 40m
2026-07-18 N5124B - Jul 18, 18:25 UTCJul 18, 19:30 UTC1h 5m
2026-07-18 N5124B HIO → HIO Jul 18, 15:30 UTCJul 18, 16:40 UTC1h 10m
2026-07-18 N5124B HIO → HIO Jul 18, 01:34 UTCJul 18, 04:15 UTC2h 41m
2026-07-17 N5124B HIO → HIO Jul 17, 23:05 UTCJul 18, 00:25 UTC1h 20m
2026-07-17 N5124B - Jul 17, 07:20 UTCJul 17, 08:25 UTC1h 5m
2026-07-17 N5124B - Jul 17, 05:50 UTCJul 17, 06:35 UTC45m
2026-07-16 N5124B - Jul 16, 23:59 UTCJul 17, 00:50 UTC50m
2026-07-15 N5124B - Jul 15, 23:15 UTCJul 16, 00:20 UTC1h 5m
2026-07-15 N5124B - Jul 15, 21:05 UTCJul 15, 22:15 UTC1h 10m
2026-07-15 N5124B - Jul 15, 20:05 UTCJul 15, 20:20 UTC15m
2026-07-15 N5124B - Jul 15, 17:35 UTCJul 15, 19:10 UTC1h 35m
2026-07-15 N5124B - Jul 15, 15:25 UTCJul 15, 16:40 UTC1h 15m
2026-07-14 N5124B - Jul 14, 23:35 UTCJul 15, 01:20 UTC1h 45m
2026-07-14 N5124B - Jul 14, 20:30 UTCJul 14, 21:40 UTC1h 10m
2026-07-14 N5124B - Jul 14, 18:15 UTCJul 14, 19:30 UTC1h 15m
2026-07-14 N5124B - Jul 14, 15:10 UTCJul 14, 16:05 UTC55m
2026-07-14 N5124B HIO → CLS Jul 14, 13:35 UTCJul 14, 14:15 UTC40m
2026-07-14 N5124B - Jul 14, 08:50 UTCJul 14, 10:50 UTC2h 0m
2026-07-14 N5124B - Jul 14, 06:50 UTCJul 14, 07:40 UTC50m
2026-07-14 N5124B - Jul 14, 05:25 UTCJul 14, 06:45 UTC1h 20m
2026-07-14 N5124B - Jul 14, 02:25 UTCJul 14, 03:25 UTC1h 0m
2026-07-13 N5124B - Jul 13, 23:30 UTCJul 14, 01:10 UTC1h 40m
2026-07-13 N5124B - Jul 13, 16:40 UTCJul 13, 18:05 UTC1h 25m
2026-07-12 N5124B HIO → HIO Jul 12, 19:25 UTCJul 12, 20:20 UTC55m
2026-07-12 N5124B - Jul 12, 17:15 UTCJul 12, 18:01 UTC45m
2026-07-12 N5124B - Jul 12, 16:10 UTCJul 12, 16:45 UTC35m
2026-07-12 N5124B - Jul 12, 03:01 UTCJul 12, 04:35 UTC1h 35m
2026-07-12 N5124B HIO → EUG Jul 12, 00:30 UTCJul 12, 01:45 UTC1h 15m
2026-07-11 N5124B - Jul 11, 21:30 UTCJul 11, 22:45 UTC1h 15m
2026-07-11 N5124B - Jul 11, 05:01 UTCJul 11, 05:50 UTC50m
2026-07-10 N5124B - Jul 10, 23:50 UTCJul 11, 01:20 UTC1h 30m
2026-07-10 N5124B - Jul 10, 21:45 UTCJul 10, 22:45 UTC1h 0m
2026-07-10 N5124B - Jul 10, 19:35 UTCJul 10, 20:45 UTC1h 10m
2026-07-10 N5124B - Jul 10, 17:35 UTCJul 10, 18:45 UTC1h 10m
2026-07-10 N5124B - Jul 10, 14:55 UTCJul 10, 16:25 UTC1h 30m
2026-07-10 N5124B - Jul 10, 03:05 UTCJul 10, 04:05 UTC1h 0m
2026-07-10 N5124B - Jul 10, 00:15 UTCJul 10, 01:35 UTC1h 20m
2026-07-09 N5124B - Jul 9, 18:25 UTCJul 9, 19:50 UTC1h 25m
2026-07-09 N5124B - Jul 9, 14:30 UTCJul 9, 16:15 UTC1h 45m
2026-07-09 N5124B - Jul 9, 04:45 UTCJul 9, 06:15 UTC1h 30m
2026-07-09 N5124B - Jul 9, 02:45 UTCJul 9, 03:55 UTC1h 10m
2026-07-09 N5124B - Jul 9, 00:10 UTCJul 9, 01:20 UTC1h 10m
2026-07-08 N5124B - Jul 8, 22:00 UTCJul 8, 23:15 UTC1h 15m
2026-07-03 N5124B - Jul 3, 00:50 UTCJul 3, 02:00 UTC1h 10m

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 N5124B page for operator, model, and routing details .

Mode-S A66BC3 frequently asked

What is Mode-S code A66BC3?
A66BC3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N5124B.
Where is Mode-S A66BC3 registered?
Mode-S code A66BC3 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 A66BC3 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 A66BC3, octal 51465703, decimal 10,906,563.
What flights does A66BC3 operate?
Mode-S A66BC3 has broadcast 1 distinct callsign, including N5124B.