Apparatus

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sensors Mode-S transponder

503E1D

ICAO 24-bit transponder address · allocated to Lithuania

Currently assigned to LY-TZT · CESSNA 150

Hex
503E1D
Octal
24037035
Decimal
5,258,781
Country
LT
Tail
LY-TZT
Type
C150
No current signal · last broadcast 7d ago
Flights observed
90
Distinct callsigns
1
Country
LT
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 503E1D.

Country allocation

The ICAO 24-bit address 503E1D falls within the block assigned to Lithuania (LT) by ICAO Annex 10, Volume III. Every aircraft registered in Lithuania 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
LYTZT - 90 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 LYTZT - Jul 25, 14:30 UTCJul 25, 15:25 UTC55m
2026-07-25 LYTZT - Jul 25, 12:25 UTCJul 25, 13:20 UTC55m
2026-07-25 LYTZT - Jul 25, 10:05 UTCJul 25, 11:00 UTC55m
2026-07-24 LYTZT - Jul 24, 15:30 UTCJul 24, 17:20 UTC1h 50m
2026-07-24 LYTZT - Jul 24, 09:55 UTCJul 24, 11:50 UTC1h 55m
2026-07-22 LYTZT - Jul 22, 15:20 UTCJul 22, 16:15 UTC55m
2026-07-21 LYTZT - Jul 21, 15:55 UTCJul 21, 18:30 UTC2h 35m
2026-07-21 LYTZT - Jul 21, 14:15 UTCJul 21, 15:00 UTC45m
2026-07-20 LYTZT - Jul 20, 16:30 UTCJul 20, 17:35 UTC1h 5m
2026-07-19 LYTZT - Jul 19, 13:10 UTCJul 19, 14:15 UTC1h 5m
2026-07-17 LYTZT - Jul 17, 16:49 UTCJul 17, 18:25 UTC1h 35m
2026-07-17 LYTZT - Jul 17, 10:44 UTCJul 17, 11:20 UTC35m
2026-07-17 LYTZT - Jul 17, 09:30 UTCJul 17, 10:05 UTC35m
2026-07-17 LYTZT - Jul 17, 04:25 UTCJul 17, 04:59 UTC35m
2026-07-16 LYTZT - Jul 16, 16:19 UTCJul 16, 17:25 UTC1h 5m
2026-07-16 LYTZT - Jul 16, 11:45 UTCJul 16, 13:20 UTC1h 35m
2026-07-16 LYTZT - Jul 16, 08:35 UTCJul 16, 09:50 UTC1h 15m
2026-07-15 LYTZT - Jul 15, 15:45 UTCJul 15, 17:10 UTC1h 25m
2026-07-15 LYTZT - Jul 15, 14:20 UTCJul 15, 14:50 UTC30m
2026-07-15 LYTZT - Jul 15, 13:00 UTCJul 15, 13:30 UTC30m
2026-07-15 LYTZT - Jul 15, 10:35 UTCJul 15, 12:00 UTC1h 25m
2026-07-14 LYTZT - Jul 14, 16:50 UTCJul 14, 17:45 UTC55m
2026-07-13 LYTZT - Jul 13, 11:35 UTCJul 13, 12:55 UTC1h 20m
2026-07-13 LYTZT - Jul 13, 08:05 UTCJul 13, 08:45 UTC40m
2026-07-12 LYTZT - Jul 12, 10:20 UTCJul 12, 11:50 UTC1h 30m
2026-07-11 LYTZT - Jul 11, 09:10 UTCJul 11, 09:55 UTC45m
2026-07-11 LYTZT - Jul 11, 06:40 UTCJul 11, 08:15 UTC1h 35m
2026-07-10 LYTZT - Jul 10, 18:00 UTCJul 10, 18:50 UTC50m
2026-07-10 LYTZT - Jul 10, 15:40 UTCJul 10, 17:10 UTC1h 30m
2026-07-09 LYTZT - Jul 9, 16:35 UTCJul 9, 18:45 UTC2h 10m
2026-07-06 LYTZT - Jul 6, 13:30 UTCJul 6, 15:05 UTC1h 35m
2026-07-02 LYTZT - Jul 2, 16:30 UTCJul 2, 18:20 UTC1h 50m
2026-06-30 LYTZT - Jun 30, 17:20 UTCJun 30, 18:50 UTC1h 30m
2026-06-27 LYTZT - Jun 27, 08:25 UTCJun 27, 08:49 UTC25m
2026-06-25 LYTZT - Jun 25, 18:10 UTCJun 25, 18:39 UTC30m
2026-06-25 LYTZT - Jun 25, 16:45 UTCJun 25, 17:30 UTC45m
2026-06-25 LYTZT - Jun 25, 12:15 UTCJun 25, 13:29 UTC1h 15m
2026-06-24 LYTZT - Jun 24, 14:50 UTCJun 24, 16:24 UTC1h 35m
2026-06-24 LYTZT - Jun 24, 11:05 UTCJun 24, 12:14 UTC1h 10m
2026-06-24 LYTZT - Jun 24, 09:05 UTCJun 24, 09:55 UTC50m
2026-06-24 LYTZT - Jun 24, 07:34 UTCJun 24, 08:04 UTC30m
2026-06-22 LYTZT - Jun 22, 16:50 UTCJun 22, 18:04 UTC1h 15m
2026-06-22 LYTZT - Jun 22, 07:00 UTCJun 22, 07:25 UTC25m
2026-06-20 LYTZT - Jun 20, 16:49 UTCJun 20, 18:45 UTC1h 55m
2026-06-20 LYTZT - Jun 20, 14:19 UTCJun 20, 15:49 UTC1h 30m
2026-06-20 LYTZT - Jun 20, 11:49 UTCJun 20, 13:24 UTC1h 35m
2026-06-20 LYTZT - Jun 20, 09:49 UTCJun 20, 10:59 UTC1h 10m
2026-06-20 LYTZT - Jun 20, 08:19 UTCJun 20, 09:05 UTC45m
2026-06-20 LYTZT - Jun 20, 06:05 UTCJun 20, 06:54 UTC50m
2026-06-19 LYTZT - Jun 19, 17:29 UTCJun 19, 18:20 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 LY-TZT page for operator, model, and routing details .

Mode-S 503E1D frequently asked

What is Mode-S code 503E1D?
503E1D is an ICAO 24-bit transponder address. Allocated to Lithuania. Assigned to LY-TZT.
Where is Mode-S 503E1D registered?
Mode-S code 503E1D is allocated to Lithuania (LT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 503E1D broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 503E1D, octal 24037035, decimal 5,258,781.
What flights does 503E1D operate?
Mode-S 503E1D has broadcast 1 distinct callsign, including LYTZT.