Apparatus

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sensors Mode-S transponder

300939

ICAO 24-bit transponder address · allocated to Italy

Currently assigned to I-ILEX · AIRBUS HELICOPTERS EC-145

Hex
300939
Octal
14004471
Decimal
3,148,089
Country
IT
Tail
I-ILEX
Type
EC45
No current signal · last broadcast 22d ago
Flights observed
99
Distinct callsigns
1
Country
IT
Last broadcast
22d ago

Last known position

Most recent position reported by Mode-S 300939.

Country allocation

The ICAO 24-bit address 300939 falls within the block assigned to Italy (IT) by ICAO Annex 10, Volume III. Every aircraft registered in Italy 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
IILEX - 99 2026-06-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-13 IILEX - Jun 13, 14:40 UTCJun 13, 16:50 UTC2h 10m
2026-06-13 IILEX - Jun 13, 13:30 UTCJun 13, 13:40 UTC10m
2026-06-13 IILEX - Jun 13, 12:20 UTCJun 13, 12:35 UTC15m
2026-06-13 IILEX - Jun 13, 10:45 UTCJun 13, 11:10 UTC25m
2026-06-13 IILEX - Jun 13, 08:00 UTCJun 13, 08:45 UTC45m
2026-06-12 IILEX - Jun 12, 17:15 UTCJun 12, 17:25 UTC10m
2026-06-12 IILEX - Jun 12, 15:50 UTCJun 12, 16:00 UTC10m
2026-06-12 IILEX - Jun 12, 14:50 UTCJun 12, 15:00 UTC10m
2026-06-12 IILEX - Jun 12, 12:30 UTCJun 12, 12:45 UTC15m
2026-06-12 IILEX - Jun 12, 10:45 UTCJun 12, 11:00 UTC15m
2026-06-12 IILEX - Jun 12, 09:15 UTCJun 12, 09:25 UTC10m
2026-06-11 IILEX - Jun 11, 15:55 UTCJun 11, 16:05 UTC10m
2026-06-11 IILEX - Jun 11, 14:55 UTCJun 11, 15:05 UTC10m
2026-06-11 IILEX - Jun 11, 14:00 UTCJun 11, 14:10 UTC10m
2026-06-11 IILEX - Jun 11, 09:50 UTCJun 11, 10:00 UTC10m
2026-06-11 IILEX - Jun 11, 07:55 UTCJun 11, 08:10 UTC15m
2026-06-10 IILEX - Jun 10, 17:40 UTCJun 10, 17:50 UTC10m
2026-06-10 IILEX - Jun 10, 16:35 UTCJun 10, 16:50 UTC15m
2026-06-10 IILEX - Jun 10, 15:05 UTCJun 10, 16:05 UTC1h 0m
2026-06-10 IILEX - Jun 10, 14:10 UTCJun 10, 14:45 UTC35m
2026-06-10 IILEX - Jun 10, 12:30 UTCJun 10, 12:55 UTC25m
2026-06-10 IILEX - Jun 10, 08:55 UTCJun 10, 09:05 UTC10m
2026-06-10 IILEX - Jun 10, 06:30 UTCJun 10, 06:40 UTC10m
2026-06-09 IILEX - Jun 9, 15:25 UTCJun 9, 15:35 UTC10m
2026-06-09 IILEX - Jun 9, 14:05 UTCJun 9, 14:55 UTC50m
2026-06-09 IILEX - Jun 9, 12:30 UTCJun 9, 12:45 UTC15m
2026-06-09 IILEX AHO → AHO Jun 9, 09:45 UTCJun 9, 10:10 UTC25m
2026-06-08 IILEX - Jun 8, 18:25 UTCJun 8, 18:40 UTC15m
2026-06-08 IILEX - Jun 8, 15:04 UTCJun 8, 15:15 UTC10m
2026-06-08 IILEX - Jun 8, 13:10 UTCJun 8, 13:25 UTC15m
2026-06-08 IILEX - Jun 8, 11:40 UTCJun 8, 11:55 UTC15m
2026-06-07 IILEX - Jun 7, 13:15 UTCJun 7, 13:30 UTC15m
2026-06-07 IILEX - Jun 7, 11:05 UTCJun 7, 11:15 UTC10m
2026-06-06 IILEX AHO → AHO Jun 6, 16:10 UTCJun 6, 16:20 UTC10m
2026-06-06 IILEX - Jun 6, 11:39 UTCJun 6, 11:49 UTC10m
2026-06-06 IILEX - Jun 6, 10:55 UTCJun 6, 11:05 UTC10m
2026-06-06 IILEX - Jun 6, 08:55 UTCJun 6, 09:04 UTC10m
2026-06-06 IILEX - Jun 6, 07:05 UTCJun 6, 08:00 UTC55m
2026-06-05 IILEX - Jun 5, 15:15 UTCJun 5, 15:25 UTC10m
2026-06-05 IILEX - Jun 5, 14:40 UTCJun 5, 15:00 UTC20m
2026-06-05 IILEX - Jun 5, 10:50 UTCJun 5, 11:00 UTC10m
2026-06-05 IILEX - Jun 5, 09:00 UTCJun 5, 10:05 UTC1h 5m
2026-06-05 IILEX - Jun 5, 08:25 UTCJun 5, 08:35 UTC10m
2026-06-04 IILEX - Jun 4, 14:30 UTCJun 4, 14:40 UTC10m
2026-06-04 IILEX - Jun 4, 12:30 UTCJun 4, 12:45 UTC15m
2026-06-04 IILEX - Jun 4, 12:00 UTCJun 4, 12:10 UTC10m
2026-06-04 IILEX - Jun 4, 11:15 UTCJun 4, 11:25 UTC10m
2026-06-04 IILEX - Jun 4, 09:00 UTCJun 4, 09:10 UTC10m
2026-06-03 IILEX AHO → AHO Jun 3, 15:40 UTCJun 3, 16:00 UTC20m
2026-06-03 IILEX - Jun 3, 10:20 UTCJun 3, 11:10 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 I-ILEX page for operator, model, and routing details .

Mode-S 300939 frequently asked

What is Mode-S code 300939?
300939 is an ICAO 24-bit transponder address. Allocated to Italy. Assigned to I-ILEX.
Where is Mode-S 300939 registered?
Mode-S code 300939 is allocated to Italy (IT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 300939 broadcasting right now?
No active broadcast right now. Last signal was 22d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 300939, octal 14004471, decimal 3,148,089.
What flights does 300939 operate?
Mode-S 300939 has broadcast 1 distinct callsign, including IILEX.