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sensors Mode-S transponder

A2C508

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N278JM · operated by JLM AVIATION LLC

Hex
A2C508
Octal
50542410
Decimal
10,667,272
Country
US
Tail
N278JM
Type
PC12
No current signal · last broadcast 11d ago
Flights observed
154
Distinct callsigns
1
Country
US
Last broadcast
11d ago

Last known position

Most recent position reported by Mode-S A2C508.

Country allocation

The ICAO 24-bit address A2C508 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
N278JM - 154 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N278JM - Jul 26, 20:50 UTCJul 26, 22:00 UTC1h 10m
2026-07-26 N278JM - Jul 26, 16:40 UTCJul 26, 19:10 UTC2h 30m
2026-07-25 N278JM - Jul 25, 20:55 UTCJul 25, 23:20 UTC2h 25m
2026-07-25 N278JM - Jul 25, 18:20 UTCJul 25, 20:10 UTC1h 50m
2026-07-25 N278JM - Jul 25, 16:00 UTCJul 25, 17:25 UTC1h 25m
2026-07-24 N278JM SBA → HHR Jul 24, 03:45 UTCJul 24, 04:25 UTC40m
2026-07-23 N278JM - Jul 23, 22:55 UTCJul 23, 23:25 UTC30m
2026-07-23 N278JM - Jul 23, 20:30 UTCJul 23, 21:20 UTC50m
2026-07-23 N278JM - Jul 23, 18:45 UTCJul 23, 18:55 UTC10m
2026-07-23 N278JM - Jul 23, 17:45 UTCJul 23, 18:10 UTC25m
2026-07-23 N278JM - Jul 23, 01:50 UTCJul 23, 02:05 UTC15m
2026-07-22 N278JM - Jul 22, 23:30 UTCJul 23, 00:25 UTC55m
2026-07-22 N278JM - Jul 22, 17:25 UTCJul 22, 18:15 UTC50m
2026-07-22 N278JM - Jul 22, 15:00 UTCJul 22, 15:20 UTC20m
2026-07-21 N278JM - Jul 21, 17:10 UTCJul 21, 17:30 UTC20m
2026-07-21 N278JM - Jul 21, 16:15 UTCJul 21, 16:35 UTC20m
2026-07-21 N278JM - Jul 21, 14:20 UTCJul 21, 15:05 UTC45m
2026-07-21 N278JM - Jul 21, 13:05 UTCJul 21, 13:25 UTC20m
2026-07-20 N278JM - Jul 20, 21:30 UTCJul 20, 23:00 UTC1h 30m
2026-07-20 N278JM - Jul 20, 20:15 UTCJul 20, 21:00 UTC45m
2026-07-20 N278JM - Jul 20, 19:25 UTCJul 20, 19:40 UTC15m
2026-07-18 N278JM - Jul 18, 22:45 UTCJul 18, 23:05 UTC20m
2026-07-18 N278JM - Jul 18, 20:45 UTCJul 18, 22:10 UTC1h 25m
2026-07-18 N278JM - Jul 18, 18:30 UTCJul 18, 19:30 UTC1h 0m
2026-07-18 N278JM - Jul 18, 15:10 UTCJul 18, 15:25 UTC15m
2026-07-18 N278JM - Jul 18, 00:29 UTCJul 18, 00:39 UTC10m
2026-07-17 N278JM - Jul 17, 22:05 UTCJul 17, 23:50 UTC1h 45m
2026-07-17 N278JM - Jul 17, 19:55 UTCJul 17, 20:55 UTC1h 0m
2026-07-17 N278JM - Jul 17, 02:50 UTCJul 17, 04:14 UTC1h 25m
2026-07-17 N278JM - Jul 17, 01:15 UTCJul 17, 01:29 UTC15m
2026-07-16 N278JM - Jul 16, 22:45 UTCJul 17, 00:25 UTC1h 40m
2026-07-16 N278JM - Jul 16, 21:10 UTCJul 16, 21:45 UTC35m
2026-07-16 N278JM - Jul 16, 20:15 UTCJul 16, 20:39 UTC25m
2026-07-16 N278JM - Jul 16, 04:35 UTCJul 16, 05:20 UTC45m
2026-07-15 N278JM - Jul 15, 23:30 UTCJul 15, 23:45 UTC15m
2026-07-15 N278JM - Jul 15, 21:00 UTCJul 15, 22:45 UTC1h 45m
2026-07-15 N278JM - Jul 15, 18:25 UTCJul 15, 20:20 UTC1h 55m
2026-07-15 N278JM - Jul 15, 17:40 UTCJul 15, 17:50 UTC10m
2026-07-15 N278JM - Jul 15, 16:15 UTCJul 15, 16:35 UTC20m
2026-07-14 N278JM - Jul 14, 22:05 UTCJul 14, 22:25 UTC20m
2026-07-14 N278JM - Jul 14, 15:25 UTCJul 14, 15:45 UTC20m
2026-07-13 N278JM - Jul 13, 23:15 UTCJul 14, 00:10 UTC55m
2026-07-13 N278JM - Jul 13, 22:05 UTCJul 13, 22:30 UTC25m
2026-07-13 N278JM - Jul 13, 19:45 UTCJul 13, 21:30 UTC1h 45m
2026-07-13 N278JM - Jul 13, 17:30 UTCJul 13, 18:50 UTC1h 20m
2026-07-13 N278JM - Jul 13, 14:25 UTCJul 13, 16:50 UTC2h 25m
2026-07-12 N278JM - Jul 12, 16:15 UTCJul 12, 16:25 UTC10m
2026-07-12 N278JM - Jul 12, 14:50 UTCJul 12, 15:50 UTC1h 0m
2026-07-12 N278JM - Jul 12, 13:15 UTCJul 12, 14:05 UTC50m
2026-07-07 N278JM - Jul 7, 16:15 UTCJul 7, 17:05 UTC50m

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 N278JM page for operator, model, and routing details .

Mode-S A2C508 frequently asked

What is Mode-S code A2C508?
A2C508 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N278JM.
Where is Mode-S A2C508 registered?
Mode-S code A2C508 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 A2C508 broadcasting right now?
No active broadcast right now. Last signal was 11d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A2C508, octal 50542410, decimal 10,667,272.
What flights does A2C508 operate?
Mode-S A2C508 has broadcast 1 distinct callsign, including N278JM.