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 LSI143 · 37,000 ft
Flights observed
112
Distinct callsigns
20
Country
IT
Last broadcast
1h 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 - 14 2026-05-29
LSI251 - 10 2026-05-28
LSI191 - 9 2026-05-25
LSI166 - 9 2026-05-27
LSI192 - 8 2026-05-25
LSI177 - 8 2026-05-26
LSI220 - 7 2026-05-24
LSI155 - 7 2026-05-02
LSI144 - 6 2026-05-17
LSI143 - 6 2026-05-30
LSI219 - 5 2026-05-23
LSI156 - 4 2026-05-02
LSI965 - 2 2026-05-21
LSI194 - 2 2026-05-22
LSI146 - 2 2026-05-05
LSI145 - 2 2026-05-05
LSI138 - 2 2026-04-23
LSI137 - 2 2026-04-23
LSI126 - 2 2026-04-21
LSI377 - 1 2026-05-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 LSI143 - May 30, 04:40 UTCMay 30, 05:00 UTC20m
2026-05-29 LSI252 - May 29, 00:20 UTCMay 29, 14:25 UTC14h 5m
2026-05-28 LSI252 - May 28, 16:15 UTCMay 29, 14:25 UTC22h 10m
2026-05-28 LSI251 - May 28, 06:50 UTCMay 29, 00:40 UTC17h 50m
2026-05-27 LSI166 - May 27, 09:50 UTCMay 27, 13:50 UTC4h 0m
2026-05-26 LSI177 - May 26, 19:40 UTCMay 26, 20:15 UTC35m
2026-05-26 LSI177 - May 26, 08:39 UTCMay 26, 12:20 UTC3h 40m
2026-05-25 LSI192 - May 25, 22:34 UTCMay 26, 02:04 UTC3h 30m
2026-05-25 LSI192 - May 25, 11:50 UTCMay 25, 12:10 UTC20m
2026-05-25 LSI191 - May 25, 08:25 UTCMay 25, 09:05 UTC40m
2026-05-24 LSI191 - May 24, 21:15 UTCMay 24, 23:30 UTC2h 15m
2026-05-24 LSI220 - May 24, 08:15 UTCMay 24, 12:05 UTC3h 50m
2026-05-23 LSI219 - May 23, 09:05 UTCMay 24, 09:00 UTC23h 55m
2026-05-23 LSI219 - May 23, 08:10 UTCMay 23, 10:20 UTC2h 10m
2026-05-22 LSI194 - May 22, 13:25 UTCMay 22, 17:20 UTC3h 55m
2026-05-21 LSI194 - May 21, 22:30 UTCMay 21, 22:45 UTC15m
2026-05-21 LSI965 - May 21, 18:50 UTCMay 21, 19:15 UTC25m
2026-05-21 LSI965 - May 21, 07:15 UTCMay 21, 11:30 UTC4h 15m
2026-05-21 LSI364 - May 21, 04:15 UTCMay 21, 05:20 UTC1h 5m
2026-05-20 LSI220 - May 20, 19:20 UTCMay 20, 23:15 UTC3h 55m
2026-05-19 LSI220 - May 19, 21:05 UTCMay 20, 20:25 UTC23h 21m
2026-05-19 LSI219 - May 19, 19:05 UTCMay 19, 22:50 UTC3h 45m
2026-05-19 LSI377 - May 19, 06:55 UTCMay 19, 07:55 UTC1h 0m
2026-05-19 LSI376 - May 19, 03:00 UTCMay 19, 04:05 UTC1h 5m
2026-05-18 LSI220 - May 18, 19:45 UTCMay 18, 23:55 UTC4h 10m
2026-05-17 LSI220 - May 17, 22:40 UTCMay 18, 20:55 UTC22h 14m
2026-05-17 LSI219 - May 17, 19:01 UTCMay 17, 22:40 UTC3h 40m
2026-05-17 LSI144 - May 17, 03:45 UTCMay 17, 08:00 UTC4h 15m
2026-05-16 LSI144 - May 16, 19:10 UTCMay 16, 19:25 UTC15m
2026-05-16 LSI143 MXP → HKG May 16, 04:50 UTCMay 16, 16:15 UTC11h 26m
2026-05-15 LSI220 - May 15, 20:05 UTCMay 16, 00:10 UTC4h 5m
2026-05-14 LSI220 - May 14, 21:05 UTCMay 15, 21:00 UTC23h 54m
2026-05-14 LSI219 - May 14, 19:20 UTCMay 14, 21:20 UTC2h 0m
2026-05-13 LSI166 - May 13, 09:55 UTCMay 13, 14:05 UTC4h 10m
2026-05-12 LSI166 - May 12, 23:10 UTCMay 12, 23:20 UTC10m
2026-05-12 LSI177 - May 12, 08:20 UTCMay 12, 19:25 UTC11h 5m
2026-05-11 LSI192 - May 11, 22:00 UTCMay 11, 22:35 UTC34m
2026-05-11 LSI192 - May 11, 11:35 UTCMay 11, 11:50 UTC15m
2026-05-11 LSI191 - May 11, 08:15 UTCMay 11, 09:00 UTC45m
2026-05-10 LSI191 - May 10, 21:14 UTCMay 10, 23:15 UTC2h 0m
2026-05-09 LSI144 - May 9, 22:45 UTCMay 10, 03:00 UTC4h 15m
2026-05-09 LSI144 - May 9, 14:05 UTCMay 9, 14:20 UTC15m
2026-05-09 LSI143 - May 9, 10:45 UTCMay 9, 11:05 UTC20m
2026-05-08 LSI143 - May 8, 23:45 UTCMay 9, 01:50 UTC2h 5m
2026-05-07 LSI252 - May 7, 22:59 UTCMay 8, 12:25 UTC13h 25m
2026-05-07 LSI252 - May 7, 16:40 UTCMay 8, 12:25 UTC19h 44m
2026-05-07 LSI251 - May 7, 09:05 UTCMay 8, 08:59 UTC23h 54m
2026-05-07 LSI251 - May 7, 07:00 UTCMay 7, 23:19 UTC16h 20m
2026-05-06 LSI346 - May 6, 06:15 UTCMay 6, 07:15 UTC1h 0m
2026-05-05 LSI146 - May 5, 23:45 UTCMay 6, 04:00 UTC4h 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.

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, LSI251, LSI191, LSI166, LSI192.