sensors Mode-S transponder

503D6F

ICAO 24-bit transponder address · allocated to Lithuania

Currently assigned to LY-HMD · AIRBUS A-320

Hex
503D6F
Octal
24036557
Decimal
5,258,607
Country
LT
Tail
LY-HMD
Type
A320
No current signal · last broadcast 17h ago
Flights observed
106
Distinct callsigns
20
Country
LT
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 503D6F.

Country allocation

The ICAO 24-bit address 503D6F 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
2026-05-29 AHY076 IST → GYD May 29, 09:20 UTCMay 29, 11:15 UTC1h 55m
2026-05-29 AHY075 GYD → IST May 29, 07:10 UTCMay 29, 07:35 UTC25m
2026-05-29 AHY075 GYD → IST May 29, 05:05 UTCMay 29, 06:25 UTC1h 20m
2026-05-26 AHY8003 GYD → ESB May 26, 17:25 UTCMay 26, 22:15 UTC4h 50m
2026-05-26 AHY036 MXP → GYD May 26, 10:44 UTCMay 26, 14:50 UTC4h 5m
2026-05-25 AHY035 GYD → MXP May 25, 13:50 UTCMay 26, 08:04 UTC18h 14m
2026-05-25 AHY035 GYD → MXP May 25, 11:50 UTCMay 26, 08:04 UTC20h 14m
2026-05-25 AHY035 GYD → MXP May 25, 10:35 UTCMay 26, 08:04 UTC21h 30m
2026-05-25 AHY035 GYD → MXP May 25, 04:40 UTCMay 25, 08:35 UTC3h 55m
2026-05-22 AHY110 PRG → GYD May 22, 11:40 UTCMay 22, 15:25 UTC3h 45m
2026-05-22 AHY109 GYD → PRG May 22, 06:00 UTCMay 22, 09:40 UTC3h 40m
2026-05-19 AHY036 MXP → GYD May 19, 10:00 UTCMay 19, 22:05 UTC12h 5m
2026-05-19 AHY035 GYD → MXP May 19, 03:45 UTCMay 19, 08:00 UTC4h 15m
2026-05-18 AHY035 GYD → MXP May 18, 09:50 UTCMay 19, 08:00 UTC22h 9m
2026-05-18 AHY035 GYD → MXP May 18, 09:20 UTCMay 19, 07:45 UTC22h 24m
2026-05-18 AHY025 GYD → AYT May 18, 06:35 UTCMay 18, 07:00 UTC25m
2026-05-17 AHY8003 GYD → ESB May 17, 11:50 UTCMay 18, 05:50 UTC18h 0m
2026-05-17 AHY036 MXP → GYD May 17, 09:55 UTCMay 18, 05:50 UTC19h 55m
2026-05-16 AHY035 GYD → MXP May 16, 14:01 UTCMay 17, 08:20 UTC18h 19m
2026-05-16 AHY8105 GYD → SAW May 16, 09:31 UTCMay 16, 10:50 UTC1h 20m
2026-05-15 AHY8105 GYD → SAW May 15, 14:00 UTCMay 16, 10:50 UTC20h 50m
2026-05-15 AHY110 PRG → GYD May 15, 11:50 UTCMay 16, 10:50 UTC23h 0m
2026-05-15 AHY110 PRG → GYD May 15, 11:25 UTCMay 16, 09:45 UTC22h 20m
2026-05-14 AHY109 GYD → PRG May 14, 23:15 UTCMay 15, 09:55 UTC10h 40m
2026-05-14 AHY8226 TBS → GYD May 14, 19:00 UTCMay 14, 22:00 UTC3h 0m
2026-05-14 AHY8225 GYD → TBS May 14, 17:05 UTCMay 14, 17:35 UTC30m
2026-05-11 AHY110 PRG → GYD May 11, 11:30 UTCMay 11, 15:05 UTC3h 35m
2026-05-11 AHY109 GYD → PRG May 11, 05:55 UTCMay 11, 09:55 UTC4h 0m
2026-05-10 AHY109 GYD → PRG May 10, 14:30 UTCMay 11, 09:55 UTC19h 25m
2026-05-10 AHY109 GYD → PRG May 10, 11:50 UTCMay 11, 09:55 UTC22h 5m
2026-05-10 AHY074 CDG → GYD May 10, 10:45 UTCMay 11, 09:45 UTC23h 0m
2026-05-09 AHY073 GYD → CDG May 9, 14:50 UTCMay 10, 09:05 UTC18h 15m
2026-05-09 AHY073 GYD → CDG May 9, 11:50 UTCMay 10, 09:05 UTC21h 15m
2026-05-09 AHY109 GYD → PRG May 9, 06:05 UTCMay 9, 10:00 UTC3h 55m
2026-05-08 AHY109 GYD → PRG May 8, 14:15 UTCMay 9, 10:00 UTC19h 45m
2026-05-08 AHY109 GYD → PRG May 8, 11:49 UTCMay 9, 10:00 UTC22h 10m
2026-05-08 AHY109 GYD → PRG May 8, 11:14 UTCMay 9, 09:45 UTC22h 30m
2026-05-07 AHY109 GYD → PRG May 7, 13:50 UTCMay 8, 09:44 UTC19h 54m
2026-05-07 AHY109 GYD → PRG May 7, 11:50 UTCMay 8, 09:44 UTC21h 55m
2026-05-07 AHY109 GYD → PRG May 7, 10:15 UTCMay 8, 09:44 UTC23h 30m
2026-05-07 AHY035 GYD → MXP May 7, 03:45 UTCMay 7, 08:10 UTC4h 25m
2026-05-06 AHY035 GYD → MXP May 6, 13:10 UTCMay 7, 08:10 UTC19h 0m
2026-05-06 AHY8224 TBS → GYD May 6, 07:45 UTCMay 6, 11:35 UTC3h 50m
2026-05-06 AHY8223 GYD → TBS May 6, 06:10 UTCMay 6, 06:30 UTC20m
2026-05-04 AHY8003 GYD → ESB May 4, 17:00 UTCMay 4, 21:55 UTC4h 56m
2026-04-28 AHY078 IST → GYD Apr 28, 21:25 UTCApr 28, 22:10 UTC45m
2026-04-28 AHY077 GYD → IST Apr 28, 16:10 UTCApr 28, 17:40 UTC1h 30m
2026-04-27 AHY110 PRG → GYD Apr 27, 11:20 UTCApr 27, 14:50 UTC3h 30m
2026-04-27 AHY109 GYD → PRG Apr 27, 05:45 UTCApr 27, 09:55 UTC4h 10m
2026-04-26 AHY109 GYD → PRG Apr 26, 13:50 UTCApr 27, 09:55 UTC20h 5m

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

Mode-S 503D6F frequently asked

What is Mode-S code 503D6F?
503D6F is an ICAO 24-bit transponder address. Allocated to Lithuania. Assigned to LY-HMD.
Where is Mode-S 503D6F registered?
Mode-S code 503D6F is allocated to Lithuania (LT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 503D6F broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 503D6F, octal 24036557, decimal 5,258,607.
What flights does 503D6F operate?
Mode-S 503D6F has broadcast 20 distinct callsigns, including AHY035, AHY109, AHY071, AHY036, AHY110.