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sensors Mode-S transponder

503D4B

ICAO 24-bit transponder address · allocated to Lithuania

Currently assigned to LY-MAD · AIRBUS A-320

Hex
503D4B
Octal
24036513
Decimal
5,258,571
Country
LT
Tail
LY-MAD
Type
A320
No current signal · last broadcast 2d ago
Flights observed
192
Distinct callsigns
20
Country
LT
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 503D4B.

Country allocation

The ICAO 24-bit address 503D4B 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 20 distinct

Callsign Airline Flights Last seen
AHY035 - 24 2026-07-04
AHY025 - 18 2026-07-08
AHY063 - 14 2026-06-22
AHY036 - 14 2026-07-04
AHY109 - 11 2026-06-25
AHY8105 - 10 2026-06-30
AHY064 - 9 2026-06-23
AHY073 - 8 2026-07-09
AHY026 - 8 2026-07-08
AHY071 - 7 2026-07-11
AHY8041 - 6 2026-06-15
AHY8003 - 5 2026-07-08
AHY072 - 5 2026-07-11
AHY8042 Azerbaijan Airlines 4 2026-06-05
AHY704 - 4 2026-07-12
AHY077 Azerbaijan Airlines 4 2026-06-02
AHY703 - 3 2026-07-11
AHY125 - 3 2026-07-06
AHY110 - 3 2026-06-24
AHY074 - 3 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 AHY8234 - Jul 15, 13:10 UTCJul 15, 13:40 UTC30m
2026-07-15 AHY8233 - Jul 15, 11:25 UTCJul 15, 11:55 UTC30m
2026-07-15 AHY8224 - Jul 15, 08:05 UTCJul 15, 08:30 UTC25m
2026-07-15 AHY8223 - Jul 15, 06:10 UTCJul 15, 06:35 UTC25m
2026-07-14 AHY8238 - Jul 14, 22:05 UTCJul 14, 22:35 UTC30m
2026-07-14 AHY8237 - Jul 14, 20:10 UTCJul 14, 20:40 UTC30m
2026-07-14 AHY8226 - Jul 14, 17:45 UTCJul 14, 18:10 UTC25m
2026-07-14 AHY8225 - Jul 14, 15:30 UTCJul 14, 16:00 UTC30m
2026-07-12 AHY704 - Jul 12, 10:25 UTCJul 12, 12:55 UTC2h 30m
2026-07-11 AHY703 - Jul 11, 12:50 UTCJul 12, 07:35 UTC18h 45m
2026-07-11 AHY072 - Jul 11, 11:25 UTCJul 12, 07:35 UTC20h 10m
2026-07-11 AHY071 - Jul 11, 06:15 UTCJul 11, 10:10 UTC3h 55m
2026-07-10 AHY074 - Jul 10, 12:45 UTCJul 10, 16:50 UTC4h 5m
2026-07-09 AHY073 TBS → CDG Jul 9, 23:40 UTCJul 10, 10:40 UTC11h 0m
2026-07-09 AHY704 - Jul 9, 11:30 UTCJul 9, 22:10 UTC10h 40m
2026-07-09 AHY703 - Jul 9, 07:05 UTCJul 9, 09:40 UTC2h 35m
2026-07-08 AHY8003 - Jul 8, 16:35 UTCJul 8, 22:10 UTC5h 35m
2026-07-08 AHY026 - Jul 8, 08:10 UTCJul 8, 10:00 UTC1h 50m
2026-07-08 AHY025 - Jul 8, 04:35 UTCJul 8, 07:00 UTC2h 25m
2026-07-07 AHY025 - Jul 7, 09:20 UTCJul 8, 07:00 UTC21h 40m
2026-07-07 AHY025 - Jul 7, 08:00 UTCJul 8, 06:45 UTC22h 45m
2026-07-06 AHY025 - Jul 6, 14:40 UTCJul 7, 06:45 UTC16h 5m
2026-07-06 AHY125 - Jul 6, 06:40 UTCJul 6, 13:15 UTC6h 35m
2026-07-06 AHY027 - Jul 6, 02:45 UTCJul 6, 05:10 UTC2h 25m
2026-07-05 AHY8238 - Jul 5, 22:10 UTCJul 5, 22:35 UTC25m
2026-07-05 AHY126 AYT → TBS Jul 5, 15:35 UTCJul 5, 21:00 UTC5h 25m
2026-07-05 AHY125 - Jul 5, 11:40 UTCJul 5, 14:15 UTC2h 35m
2026-07-04 AHY125 - Jul 4, 15:00 UTCJul 5, 14:15 UTC23h 15m
2026-07-04 AHY036 - Jul 4, 12:50 UTCJul 5, 12:45 UTC23h 55m
2026-07-04 AHY036 - Jul 4, 12:20 UTCJul 4, 16:05 UTC3h 45m
2026-07-04 AHY035 - Jul 4, 05:40 UTCJul 4, 10:15 UTC4h 35m
2026-07-03 AHY035 - Jul 3, 08:50 UTCJul 4, 08:45 UTC23h 55m
2026-07-03 AHY026 - Jul 3, 08:05 UTCJul 4, 06:45 UTC22h 40m
2026-07-03 AHY025 - Jul 3, 04:30 UTCJul 3, 06:50 UTC2h 20m
2026-07-02 AHY025 - Jul 2, 06:51 UTCJul 3, 06:45 UTC23h 54m
2026-07-02 AHY8240 - Jul 2, 06:35 UTCJul 3, 04:45 UTC22h 10m
2026-07-02 AHY8239 - Jul 2, 04:35 UTCJul 2, 05:05 UTC30m
2026-07-01 AHY8228 - Jul 1, 12:55 UTCJul 1, 13:45 UTC50m
2026-07-01 AHY8227 - Jul 1, 10:50 UTCJul 1, 11:45 UTC55m
2026-06-30 AHY8106 - Jun 30, 13:15 UTCJun 30, 15:00 UTC1h 45m
2026-06-30 AHY8105 - Jun 30, 09:30 UTCJun 30, 11:55 UTC2h 25m
2026-06-29 AHY8105 - Jun 29, 12:49 UTCJun 30, 11:55 UTC23h 6m
2026-06-29 AHY072 - Jun 29, 11:29 UTCJun 30, 10:45 UTC23h 16m
2026-06-29 AHY071 - Jun 29, 05:59 UTCJun 29, 09:44 UTC3h 45m
2026-06-28 AHY704 - Jun 28, 10:15 UTCJun 29, 08:44 UTC22h 30m
2026-06-27 AHY703 - Jun 27, 14:09 UTCJun 28, 07:34 UTC17h 25m
2026-06-27 AHY036 - Jun 27, 10:50 UTCJun 28, 07:34 UTC20h 45m
2026-06-27 AHY036 - Jun 27, 10:25 UTCJun 28, 07:34 UTC21h 10m
2026-06-26 AHY035 - Jun 26, 16:39 UTCJun 27, 08:49 UTC16h 10m
2026-06-26 AHY035 - Jun 26, 13:55 UTCJun 27, 08:49 UTC18h 55m

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-MAD page for operator, model, and routing details .

Mode-S 503D4B frequently asked

What is Mode-S code 503D4B?
503D4B is an ICAO 24-bit transponder address. Allocated to Lithuania. Assigned to LY-MAD.
Where is Mode-S 503D4B registered?
Mode-S code 503D4B is allocated to Lithuania (LT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 503D4B broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 503D4B, octal 24036513, decimal 5,258,571.
What flights does 503D4B operate?
Mode-S 503D4B has broadcast 20 distinct callsigns, including AHY035, AHY025, AHY063, AHY036, AHY109.