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sensors Mode-S transponder

504E61

ICAO 24-bit transponder address · allocated to Moldova

Currently assigned to ER-SKY · AIRBUS A-319

Hex
504E61
Octal
24047141
Decimal
5,262,945
Country
MD
Tail
ER-SKY
Type
A319
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
542
Distinct callsigns
20
Country
MD
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 504E61.

Country allocation

The ICAO 24-bit address 504E61 falls within the block assigned to Moldova (MD) by ICAO Annex 10, Volume III. Every aircraft registered in Moldova 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
HYS482 HiSky Europe 61 2026-07-26
HYS481 HiSky Europe 46 2026-07-25
HYM458 Himalayan Airlines 34 2026-07-25
HYS474 - 32 2026-07-19
HYM457 Himalayan Airlines 32 2026-07-25
HYS473 HiSky Europe 31 2026-07-19
HYM422 - 26 2026-07-23
HYM421 - 23 2026-07-23
HYS246 HiSky Europe 18 2026-07-24
HYS245 HiSky Europe 17 2026-07-24
HYM404 - 15 2026-07-10
HYM403 - 15 2026-07-10
HYS445 HiSky Europe 14 2026-07-21
HYS446 HiSky Europe 13 2026-07-21
HYM402 Himalayan Airlines 13 2026-07-25
HYM401 Himalayan Airlines 13 2026-07-25
HYS408 HiSky Europe 12 2026-07-26
HYS491 - 11 2026-07-10
HYS492 - 10 2026-07-10
HYS407 HiSky Europe 10 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HYM412 STN → RMO Jul 26, 17:45 UTCJul 26, 22:15 UTC4h 30m
2026-07-26 HYM411 RMO → STN Jul 26, 14:10 UTCJul 26, 16:30 UTC2h 20m
2026-07-26 HYS482 OTP → RMO Jul 26, 12:00 UTCJul 26, 12:25 UTC25m
2026-07-26 HYS408 HAM → RMO Jul 26, 06:35 UTCJul 26, 10:45 UTC4h 10m
2026-07-26 HYS407 RMO → HAM Jul 26, 03:20 UTCJul 26, 05:25 UTC2h 5m
2026-07-25 HYM458 TLV → RMO Jul 25, 21:40 UTCJul 25, 23:50 UTC2h 10m
2026-07-25 HYM457 RMO → TLV Jul 25, 17:30 UTCJul 25, 19:40 UTC2h 10m
2026-07-25 HYM402 FRA → RMO Jul 25, 13:55 UTCJul 25, 15:40 UTC1h 45m
2026-07-25 HYM401 RMO → FRA Jul 25, 10:20 UTCJul 25, 12:20 UTC2h 0m
2026-07-25 HYS482 OTP → RMO Jul 25, 06:30 UTCJul 25, 06:50 UTC20m
2026-07-25 HYS481 RMO → OTP Jul 25, 04:45 UTCJul 25, 05:20 UTC35m
2026-07-25 HYM318 - Jul 25, 00:25 UTCJul 25, 01:40 UTC1h 15m
2026-07-24 HYM317 - Jul 24, 21:20 UTCJul 24, 22:55 UTC1h 35m
2026-07-24 HYS482 OTP → RMO Jul 24, 15:40 UTCJul 24, 16:05 UTC25m
2026-07-24 HYS246 BRU → OTP Jul 24, 11:30 UTCJul 24, 13:45 UTC2h 15m
2026-07-24 HYS245 OTP → BRU Jul 24, 07:45 UTCJul 24, 10:10 UTC2h 25m
2026-07-24 HYS481 RMO → OTP Jul 24, 05:20 UTCJul 24, 05:35 UTC15m
2026-07-24 HYM316 - Jul 24, 00:25 UTCJul 24, 01:40 UTC1h 15m
2026-07-23 HYM315 - Jul 23, 21:55 UTCJul 23, 22:40 UTC45m
2026-07-23 HYS408 HAM → RMO Jul 23, 16:50 UTCJul 23, 18:40 UTC1h 50m
2026-07-23 HYS407 RMO → HAM Jul 23, 13:15 UTCJul 23, 15:20 UTC2h 5m
2026-07-23 HYM422 - Jul 23, 10:55 UTCJul 23, 11:40 UTC45m
2026-07-23 HYM421 - Jul 23, 08:45 UTCJul 23, 09:10 UTC25m
2026-07-23 HYS482 OTP → RMO Jul 23, 06:15 UTCJul 23, 06:45 UTC30m
2026-07-23 HYM318 - Jul 23, 00:20 UTCJul 23, 05:15 UTC4h 55m
2026-07-22 HYM317 - Jul 22, 22:05 UTCJul 22, 22:50 UTC45m
2026-07-22 HYS482 OTP → RMO Jul 22, 15:40 UTCJul 22, 16:05 UTC25m
2026-07-22 HYS222 CDG → OTP Jul 22, 12:05 UTCJul 22, 14:20 UTC2h 15m
2026-07-22 HYM316 - Jul 22, 00:20 UTCJul 22, 10:25 UTC10h 5m
2026-07-21 HYM315 - Jul 21, 21:25 UTCJul 21, 22:50 UTC1h 25m
2026-07-21 HYS446 BVA → RMO Jul 21, 14:25 UTCJul 21, 16:40 UTC2h 15m
2026-07-21 HYS445 RMO → BVA Jul 21, 07:45 UTCJul 21, 12:45 UTC5h 0m
2026-07-21 HYM421 - Jul 21, 05:05 UTCJul 21, 06:05 UTC1h 0m
2026-07-20 HYM458 TLV → RMO Jul 20, 21:30 UTCJul 20, 23:45 UTC2h 15m
2026-07-20 HYM457 RMO → TLV Jul 20, 17:55 UTCJul 20, 20:10 UTC2h 15m
2026-07-20 HYS482 OTP → RMO Jul 20, 15:55 UTCJul 20, 16:15 UTC20m
2026-07-20 HYS246 BRU → OTP Jul 20, 11:35 UTCJul 20, 13:50 UTC2h 15m
2026-07-20 HYS245 OTP → BRU Jul 20, 07:50 UTCJul 20, 10:20 UTC2h 30m
2026-07-20 HYM314 - Jul 20, 02:10 UTCJul 20, 05:30 UTC3h 20m
2026-07-19 HYM313 - Jul 19, 23:45 UTCJul 20, 01:10 UTC1h 25m
2026-07-19 HYS474 - Jul 19, 19:30 UTCJul 19, 22:25 UTC2h 55m
2026-07-19 HYS473 RMO → DUB Jul 19, 14:50 UTCJul 19, 18:20 UTC3h 30m
2026-07-19 HYS482 OTP → RMO Jul 19, 12:40 UTCJul 19, 13:05 UTC25m
2026-07-19 HYS408 HAM → RMO Jul 19, 07:40 UTCJul 19, 09:30 UTC1h 50m
2026-07-19 HYS407 RMO → HAM Jul 19, 04:20 UTCJul 19, 06:25 UTC2h 5m
2026-07-19 HYM316 - Jul 19, 01:35 UTCJul 19, 02:55 UTC1h 20m
2026-07-18 HYM315 - Jul 18, 23:50 UTCJul 19, 00:30 UTC40m
2026-07-18 HYM458 TLV → RMO Jul 18, 19:35 UTCJul 18, 21:45 UTC2h 10m
2026-07-18 HYM402 FRA → TLV Jul 18, 12:05 UTCJul 18, 18:10 UTC6h 5m
2026-07-18 HYM401 - Jul 18, 08:55 UTCJul 18, 10:40 UTC1h 45m

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 ER-SKY page for operator, model, and routing details .

Mode-S 504E61 frequently asked

What is Mode-S code 504E61?
504E61 is an ICAO 24-bit transponder address. Allocated to Moldova. Assigned to ER-SKY.
Where is Mode-S 504E61 registered?
Mode-S code 504E61 is allocated to Moldova (MD). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 504E61 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 504E61, octal 24047141, decimal 5,262,945.
What flights does 504E61 operate?
Mode-S 504E61 has broadcast 20 distinct callsigns, including HYS482, HYS481, HYM458, HYS474, HYM457.