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 1h ago
Flights observed
93
Distinct callsigns
20
Country
LT
Last broadcast
1h 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

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 AHY077 GYD → IST Jun 2, 16:20 UTCJun 2, 18:45 UTC2h 25m
2026-06-02 AHY064 BER → GYD Jun 2, 09:50 UTCJun 2, 13:30 UTC3h 40m
2026-06-02 AHY063 GYD → BER Jun 2, 04:00 UTCJun 2, 08:25 UTC4h 25m
2026-06-01 AHY026 AYT → GYD Jun 1, 08:05 UTCJun 1, 10:00 UTC1h 55m
2026-06-01 AHY025 GYD → AYT Jun 1, 04:20 UTCJun 1, 06:45 UTC2h 25m
2026-05-31 AHY025 GYD → AYT May 31, 08:50 UTCJun 1, 06:45 UTC21h 55m
2026-05-31 AHY025 GYD → AYT May 31, 08:25 UTCJun 1, 06:45 UTC22h 20m
2026-05-30 AHY072 VIE → GYD May 30, 11:15 UTCMay 30, 14:15 UTC3h 0m
2026-05-29 AHY071 GYD → VIE May 29, 14:50 UTCMay 30, 10:00 UTC19h 10m
2026-05-29 AHY071 GYD → VIE May 29, 12:50 UTCMay 30, 10:00 UTC21h 10m
2026-05-29 AHY074 CDG → GYD May 29, 11:05 UTCMay 30, 10:00 UTC22h 55m
2026-05-28 AHY073 GYD → CDG May 28, 20:05 UTCMay 29, 09:15 UTC13h 10m
2026-05-28 AHY077 GYD → IST May 28, 16:15 UTCMay 28, 18:40 UTC2h 25m
2026-05-27 AHY026 AYT → GYD May 27, 08:10 UTCMay 27, 10:10 UTC2h 0m
2026-05-27 AHY025 GYD → AYT May 27, 06:25 UTCMay 27, 06:40 UTC15m
2026-05-27 AHY025 GYD → AYT May 27, 04:45 UTCMay 27, 05:40 UTC55m
2026-05-26 AHY8105 GYD → SAW May 26, 09:40 UTCMay 26, 15:20 UTC5h 40m
2026-05-25 AHY026 AYT → GYD May 25, 08:20 UTCMay 25, 21:45 UTC13h 24m
2026-05-25 AHY025 GYD → AYT May 25, 06:35 UTCMay 25, 07:00 UTC25m
2026-05-25 AHY025 GYD → AYT May 25, 04:40 UTCMay 25, 05:55 UTC1h 15m
2026-05-24 AHY8042 ADB → GYD May 24, 10:00 UTCMay 24, 12:15 UTC2h 15m
2026-05-23 AHY8041 GYD → ADB May 23, 12:50 UTCMay 24, 08:20 UTC19h 30m
2026-05-23 AHY110 PRG → GYD May 23, 11:25 UTCMay 24, 08:20 UTC20h 55m
2026-05-22 AHY109 GYD → PRG May 22, 21:15 UTCMay 23, 09:40 UTC12h 24m
2026-05-22 AHY109 GYD → PRG May 22, 12:50 UTCMay 23, 09:40 UTC20h 49m
2026-05-22 AHY109 GYD → PRG May 22, 10:55 UTCMay 23, 09:40 UTC22h 45m
2026-05-22 AHY704 RMO → GYD May 22, 06:20 UTCMay 22, 21:40 UTC15h 20m
2026-05-20 AHY036 MXP → GYD May 20, 09:50 UTCMay 20, 13:45 UTC3h 55m
2026-05-19 AHY035 GYD → MXP May 19, 13:50 UTCMay 20, 07:50 UTC18h 1m
2026-05-19 AHY8105 GYD → SAW May 19, 11:25 UTCMay 19, 11:35 UTC10m
2026-05-18 AHY8105 GYD → SAW May 18, 14:50 UTCMay 19, 10:40 UTC19h 49m
2026-05-18 AHY8105 GYD → SAW May 18, 14:15 UTCMay 19, 10:40 UTC20h 24m
2026-05-18 AHY8105 GYD → SAW May 18, 10:50 UTCMay 19, 10:40 UTC23h 49m
2026-05-18 AHY8105 GYD → SAW May 18, 09:35 UTCMay 18, 15:10 UTC5h 35m
2026-05-16 AHY8042 ADB → GYD May 16, 10:01 UTCMay 16, 12:11 UTC2h 10m
2026-05-15 AHY8041 GYD → ADB May 15, 12:50 UTCMay 16, 08:20 UTC19h 30m
2026-05-15 AHY8041 GYD → ADB May 15, 11:30 UTCMay 16, 08:20 UTC20h 50m
2026-05-15 AHY071 GYD → VIE May 15, 05:55 UTCMay 15, 09:30 UTC3h 35m
2026-05-14 AHY078 IST → GYD May 14, 21:20 UTCMay 14, 22:30 UTC1h 10m
2026-05-14 AHY077 GYD → IST May 14, 16:15 UTCMay 14, 17:40 UTC1h 25m
2026-05-12 AHY036 MXP → GYD May 12, 09:45 UTCMay 12, 11:50 UTC2h 5m
2026-05-12 AHY035 GYD → MXP May 12, 03:35 UTCMay 12, 08:15 UTC4h 40m
2026-05-09 AHY8042 ADB → GYD May 9, 10:10 UTCMay 9, 12:25 UTC2h 15m
2026-05-09 AHY8041 GYD → ADB May 9, 06:00 UTCMay 9, 08:35 UTC2h 35m
2026-05-05 AHY8003 GYD → ESB May 5, 16:45 UTCMay 5, 21:45 UTC5h 0m
2026-05-01 AHY110 PRG → GYD May 1, 11:05 UTCMay 1, 14:45 UTC3h 40m
2026-05-01 AHY109 GYD → PRG May 1, 06:00 UTCMay 1, 09:50 UTC3h 50m
2026-04-30 AHY109 GYD → PRG Apr 30, 12:50 UTCMay 1, 09:50 UTC21h 0m
2026-04-30 AHY109 GYD → PRG Apr 30, 10:50 UTCMay 1, 09:50 UTC23h 0m
2026-04-30 AHY064 BER → GYD Apr 30, 09:55 UTCMay 1, 08:45 UTC22h 50m

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 1h 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, AHY063, AHY109, AHY8105, AHY036.