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 Jul 26, 15:00 UTC
Flights observed
201
Distinct callsigns
20
Country
LT
Last broadcast
Jul 26, 15:00 UTC

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

Callsign Airline Flights Last seen
AHY035 Azerbaijan Airlines 22 2026-06-01
AHY109 - 21 2026-07-11
AHY036 Azerbaijan Airlines 15 2026-06-01
AHY071 - 14 2026-07-04
AHY025 Azerbaijan Airlines 12 2026-07-20
AHY8105 Azerbaijan Airlines 9 2026-07-26
AHY110 - 8 2026-07-11
AHY072 - 7 2026-07-04
AHY8003 Azerbaijan Airlines 6 2026-05-26
AHY026 Azerbaijan Airlines 6 2026-07-21
AHY8225 - 5 2026-07-19
AHY061 - 5 2026-07-18
AHY8226 Azerbaijan Airlines 4 2026-07-19
AHY8106 Azerbaijan Airlines 4 2026-07-26
AHY125 - 4 2026-07-17
AHY027 - 4 2026-07-16
AHY8237 - 3 2026-07-19
AHY8224 - 3 2026-06-22
AHY8041 - 3 2026-07-20
AHY704 - 3 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AHY8106 SAW → GYD Jul 26, 13:10 UTCJul 26, 15:00 UTC1h 50m
2026-07-26 AHY8105 GYD → SAW Jul 26, 09:30 UTCJul 26, 11:40 UTC2h 10m
2026-07-22 AHY176 IST → GYD Jul 22, 17:35 UTCJul 22, 19:25 UTC1h 50m
2026-07-22 AHY175 GYD → IST Jul 22, 13:20 UTCJul 22, 16:05 UTC2h 45m
2026-07-21 AHY026 AYT → GYD Jul 21, 08:15 UTCJul 21, 10:05 UTC1h 50m
2026-07-20 AHY025 GYD → AYT Jul 20, 11:50 UTCJul 21, 06:50 UTC18h 59m
2026-07-20 AHY025 GYD → AYT Jul 20, 10:10 UTCJul 21, 06:50 UTC20h 40m
2026-07-20 AHY8041 - Jul 20, 06:05 UTCJul 20, 08:30 UTC2h 25m
2026-07-19 AHY8238 - Jul 19, 22:10 UTCJul 19, 22:40 UTC30m
2026-07-19 AHY8237 - Jul 19, 20:20 UTCJul 19, 20:55 UTC35m
2026-07-19 AHY8226 TBS → GYD Jul 19, 17:40 UTCJul 19, 18:10 UTC30m
2026-07-19 AHY8225 - Jul 19, 15:45 UTCJul 19, 16:20 UTC35m
2026-07-19 AHY8230 TBS → GYD Jul 19, 06:15 UTCJul 19, 06:45 UTC30m
2026-07-19 AHY8229 GYD → TBS Jul 19, 04:05 UTCJul 19, 04:35 UTC30m
2026-07-18 AHY062 - Jul 18, 08:05 UTCJul 19, 04:35 UTC20h 30m
2026-07-18 AHY061 - Jul 18, 04:10 UTCJul 18, 06:25 UTC2h 15m
2026-07-17 AHY126 AYT → GYD Jul 17, 15:29 UTCJul 17, 17:25 UTC1h 55m
2026-07-17 AHY125 - Jul 17, 11:39 UTCJul 17, 14:10 UTC2h 30m
2026-07-17 AHY028 - Jul 17, 06:40 UTCJul 17, 08:35 UTC1h 55m
2026-07-16 AHY027 TBS → AYT Jul 16, 22:40 UTCJul 17, 04:44 UTC6h 5m
2026-07-16 AHY8237 - Jul 16, 20:49 UTCJul 16, 21:10 UTC20m
2026-07-16 AHY8226 - Jul 16, 18:05 UTCJul 16, 18:34 UTC30m
2026-07-16 AHY8225 - Jul 16, 16:05 UTCJul 16, 16:40 UTC35m
2026-07-16 AHY026 - Jul 16, 08:20 UTCJul 16, 10:10 UTC1h 50m
2026-07-16 AHY025 - Jul 16, 04:35 UTCJul 16, 07:05 UTC2h 30m
2026-07-15 AHY126 - Jul 15, 15:40 UTCJul 15, 17:30 UTC1h 50m
2026-07-15 AHY125 - Jul 15, 11:30 UTCJul 15, 14:05 UTC2h 35m
2026-07-15 AHY028 - Jul 15, 06:40 UTCJul 15, 08:25 UTC1h 45m
2026-07-15 AHY027 - Jul 15, 02:30 UTCJul 15, 04:55 UTC2h 25m
2026-07-14 AHY024 - Jul 14, 10:30 UTCJul 14, 12:35 UTC2h 5m
2026-07-13 AHY023 - Jul 13, 22:25 UTCJul 14, 09:00 UTC10h 35m
2026-07-13 AHY8237 - Jul 13, 20:25 UTCJul 13, 21:05 UTC40m
2026-07-13 AHY8226 - Jul 13, 17:40 UTCJul 13, 18:05 UTC25m
2026-07-13 AHY8225 - Jul 13, 15:45 UTCJul 13, 16:20 UTC35m
2026-07-13 AHY062 - Jul 13, 08:01 UTCJul 13, 09:55 UTC1h 55m
2026-07-13 AHY061 - Jul 13, 04:05 UTCJul 13, 06:25 UTC2h 20m
2026-07-12 AHY061 - Jul 12, 09:50 UTCJul 13, 06:25 UTC20h 35m
2026-07-12 AHY061 - Jul 12, 08:20 UTCJul 13, 06:25 UTC22h 5m
2026-07-12 AHY025 - Jul 12, 04:30 UTCJul 12, 06:55 UTC2h 25m
2026-07-11 AHY110 - Jul 11, 12:35 UTCJul 11, 15:50 UTC3h 15m
2026-07-11 AHY109 - Jul 11, 06:25 UTCJul 11, 10:40 UTC4h 15m
2026-07-10 AHY109 - Jul 10, 09:50 UTCJul 11, 07:55 UTC22h 5m
2026-07-10 AHY062 - Jul 10, 08:40 UTCJul 11, 07:45 UTC23h 5m
2026-07-10 AHY061 - Jul 10, 04:30 UTCJul 10, 06:55 UTC2h 25m
2026-07-09 AHY026 - Jul 9, 08:10 UTCJul 9, 09:55 UTC1h 45m
2026-07-08 AHY025 - Jul 8, 15:30 UTCJul 9, 06:50 UTC15h 20m
2026-07-08 AHY125 - Jul 8, 13:30 UTCJul 8, 14:05 UTC35m
2026-07-08 AHY028 - Jul 8, 06:40 UTCJul 8, 12:45 UTC6h 5m
2026-07-07 AHY027 - Jul 7, 16:55 UTCJul 8, 05:00 UTC12h 5m
2026-07-07 AHY704 - Jul 7, 10:45 UTCJul 7, 13:20 UTC2h 35m

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 Jul 26, 15:00 UTC.
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, AHY036, AHY071, AHY025.