sensors Mode-S transponder

300A5C

ICAO 24-bit transponder address · allocated to Italy

Hex
300A5C
Octal
14005134
Decimal
3,148,380
Country
IT
Broadcasting now · callsign LSI377 · 25,000 ft
Flights observed
198
Distinct callsigns
20
Country
IT
Last broadcast
17m ago

Current position

300A5C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 300A5C 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 20 distinct

Callsign Airline Flights Last seen
LSI252 - 25 2026-06-28
LSI220 - 19 2026-07-13
LSI251 - 18 2026-06-28
LSI219 - 13 2026-07-12
LSI166 - 11 2026-06-03
LSI192 - 10 2026-06-01
LSI191 - 10 2026-05-31
LSI155 - 10 2026-06-26
LSI177 - 9 2026-06-02
LSI144 - 9 2026-06-14
LSI143 - 9 2026-06-13
LSI156 - 8 2026-06-27
LSI126 - 6 2026-06-23
LSI965 - 4 2026-06-18
LSI377 - 4 2026-07-14
LSI376 - 4 2026-07-14
LSI138 - 4 2026-06-25
LSI125 - 4 2026-06-22
LSI137 - 3 2026-06-24
LSI996 - 2 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 LSI377 - Jul 14, 06:40 UTCJul 14, 07:00 UTC20m
2026-07-14 LSI376 - Jul 14, 02:50 UTCJul 14, 03:55 UTC1h 5m
2026-07-13 LSI220 - Jul 13, 19:15 UTCJul 13, 23:40 UTC4h 25m
2026-07-12 LSI220 - Jul 12, 21:05 UTCJul 13, 20:35 UTC23h 30m
2026-07-12 LSI219 - Jul 12, 19:20 UTCJul 12, 21:30 UTC2h 10m
2026-07-12 LSI220 - Jul 12, 07:55 UTCJul 12, 12:15 UTC4h 20m
2026-07-11 LSI220 - Jul 11, 11:10 UTCJul 12, 11:01 UTC23h 50m
2026-07-11 LSI219 - Jul 11, 09:05 UTCJul 12, 09:00 UTC23h 55m
2026-07-11 LSI219 - Jul 11, 08:10 UTCJul 11, 11:40 UTC3h 30m
2026-07-07 LSI377 - Jul 7, 08:00 UTCJul 7, 09:05 UTC1h 5m
2026-07-07 LSI376 - Jul 7, 04:45 UTCJul 7, 05:50 UTC1h 5m
2026-07-06 LSI220 - Jul 6, 22:05 UTCJul 7, 02:15 UTC4h 10m
2026-07-06 LSI220 - Jul 6, 01:15 UTCJul 7, 01:00 UTC23h 45m
2026-07-05 LSI219 - Jul 5, 22:05 UTCJul 6, 01:30 UTC3h 25m
2026-07-05 LSI220 - Jul 5, 08:25 UTCJul 5, 12:45 UTC4h 20m
2026-07-04 LSI220 - Jul 4, 11:25 UTCJul 5, 11:00 UTC23h 35m
2026-07-04 LSI219 - Jul 4, 09:05 UTCJul 5, 09:00 UTC23h 55m
2026-07-04 LSI219 - Jul 4, 08:05 UTCJul 4, 11:40 UTC3h 35m
2026-07-02 LSI513 ATL → MXP Jul 2, 19:25 UTCJul 3, 04:15 UTC8h 50m
2026-07-01 LSI512 - Jul 1, 12:25 UTCJul 1, 21:50 UTC9h 25m
2026-07-01 LSI912 - Jul 1, 07:50 UTCJul 1, 08:50 UTC1h 0m
2026-06-28 LSI252 - Jun 28, 22:24 UTCJun 29, 11:50 UTC13h 25m
2026-06-28 LSI252 - Jun 28, 16:14 UTCJun 29, 11:50 UTC19h 35m
2026-06-28 LSI252 - Jun 28, 09:05 UTCJun 29, 08:54 UTC23h 50m
2026-06-28 LSI251 - Jun 28, 07:05 UTCJun 28, 22:39 UTC15h 35m
2026-06-27 LSI156 - Jun 27, 18:15 UTCJun 27, 21:55 UTC3h 40m
2026-06-27 LSI156 - Jun 27, 07:24 UTCJun 27, 07:34 UTC10m
2026-06-26 LSI155 MXP → HKG Jun 26, 16:35 UTCJun 27, 03:44 UTC11h 10m
2026-06-25 LSI138 - Jun 25, 22:34 UTCJun 26, 02:34 UTC4h 0m
2026-06-25 LSI138 - Jun 25, 11:50 UTCJun 25, 12:04 UTC15m
2026-06-24 LSI137 - Jun 24, 21:04 UTCJun 25, 08:24 UTC11h 20m
2026-06-23 LSI126 - Jun 23, 22:10 UTCJun 24, 02:09 UTC4h 0m
2026-06-23 LSI126 - Jun 23, 13:39 UTCJun 23, 13:55 UTC15m
2026-06-22 LSI125 MXP → HKG Jun 22, 23:35 UTCJun 23, 11:04 UTC11h 30m
2026-06-21 LSI252 - Jun 21, 22:49 UTCJun 22, 12:19 UTC13h 30m
2026-06-21 LSI252 - Jun 21, 16:25 UTCJun 22, 12:19 UTC19h 55m
2026-06-21 LSI251 - Jun 21, 09:04 UTCJun 22, 09:00 UTC23h 55m
2026-06-21 LSI251 - Jun 21, 07:20 UTCJun 21, 23:14 UTC15h 55m
2026-06-20 LSI198 - Jun 20, 20:09 UTCJun 20, 23:55 UTC3h 45m
2026-06-20 LSI198 - Jun 20, 09:44 UTCJun 20, 09:59 UTC15m
2026-06-20 LSI996 - Jun 20, 07:00 UTCJun 20, 07:44 UTC45m
2026-06-19 LSI996 - Jun 19, 19:45 UTCJun 19, 22:19 UTC2h 35m
2026-06-19 LSI196 - Jun 19, 12:44 UTCJun 19, 17:14 UTC4h 30m
2026-06-19 LSI196 - Jun 19, 01:59 UTCJun 19, 02:19 UTC20m
2026-06-18 LSI965 - Jun 18, 18:15 UTCJun 18, 18:45 UTC30m
2026-06-18 LSI965 - Jun 18, 07:30 UTCJun 18, 11:20 UTC3h 50m
2026-06-18 LSI364 - Jun 18, 04:10 UTCJun 18, 05:10 UTC1h 0m
2026-06-17 LSI220 - Jun 17, 19:10 UTCJun 17, 23:10 UTC4h 0m
2026-06-16 LSI220 - Jun 16, 21:05 UTCJun 17, 20:20 UTC23h 15m
2026-06-16 LSI219 - Jun 16, 19:05 UTCJun 16, 22:40 UTC3h 36m

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.

Mode-S 300A5C frequently asked

What is Mode-S code 300A5C?
300A5C is an ICAO 24-bit transponder address. Allocated to Italy.
Where is Mode-S 300A5C registered?
Mode-S code 300A5C is allocated to Italy (IT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 300A5C broadcasting right now?
Yes. Mode-S 300A5C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 300A5C, octal 14005134, decimal 3,148,380.
What flights does 300A5C operate?
Mode-S 300A5C has broadcast 20 distinct callsigns, including LSI252, LSI220, LSI251, LSI219, LSI166.