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 1h ago
Flights observed
228
Distinct callsigns
20
Country
MD
Last broadcast
1h ago

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 20 2026-05-25
HYS474 HiSky Europe 17 2026-05-29
HYS481 HiSky Europe 16 2026-05-25
HYS473 HiSky Europe 16 2026-05-29
HYM458 Himalayan Airlines 16 2026-05-27
HYM457 Himalayan Airlines 15 2026-05-27
HYM422 Himalayan Airlines 13 2026-05-28
HYS246 HiSky Europe 10 2026-05-25
HYS245 HiSky Europe 9 2026-05-25
HYM404 Himalayan Airlines 8 2026-05-29
HYM403 Himalayan Airlines 8 2026-05-29
HYS492 HiSky Europe 7 2026-05-29
HYS491 HiSky Europe 7 2026-05-29
HYM421 Himalayan Airlines 7 2026-05-26
HYM483 Himalayan Airlines 6 2026-05-02
HYS446 HiSky Europe 5 2026-05-26
HYS445 HiSky Europe 5 2026-05-26
HYM484 Himalayan Airlines 5 2026-05-02
HYS408 HiSky Europe 3 2026-04-19
HYS407 HiSky Europe 3 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 HYS474 DUB → RMO May 29, 22:25 UTCMay 30, 00:15 UTC1h 50m
2026-05-29 HYS473 RMO → DUB May 29, 17:50 UTCMay 29, 21:25 UTC3h 35m
2026-05-29 HYS492 VCE → RMO May 29, 14:45 UTCMay 29, 16:15 UTC1h 30m
2026-05-29 HYS491 RMO → VCE May 29, 11:40 UTCMay 29, 13:30 UTC1h 50m
2026-05-29 HYM404 DUS → RMO May 29, 08:10 UTCMay 29, 10:05 UTC1h 55m
2026-05-29 HYM403 RMO → DUS May 29, 04:40 UTCMay 29, 06:50 UTC2h 10m
2026-05-28 HYS474 DUB → RMO May 28, 23:05 UTCMay 29, 02:00 UTC2h 55m
2026-05-28 HYS473 RMO → DUB May 28, 17:55 UTCMay 28, 21:35 UTC3h 40m
2026-05-28 HYM422 IST → RMO May 28, 09:00 UTCMay 28, 09:45 UTC45m
2026-05-27 HYM458 TLV → RMO May 27, 21:20 UTCMay 28, 07:35 UTC10h 15m
2026-05-27 HYM457 RMO → TLV May 27, 18:10 UTCMay 27, 19:55 UTC1h 45m
2026-05-26 HYS446 BVA → RMO May 26, 13:19 UTCMay 26, 15:39 UTC2h 20m
2026-05-26 HYS445 RMO → BVA May 26, 09:15 UTCMay 26, 11:50 UTC2h 35m
2026-05-26 HYM422 IST → RMO May 26, 07:10 UTCMay 26, 07:49 UTC40m
2026-05-26 HYM421 RMO → IST May 26, 04:20 UTCMay 26, 05:15 UTC55m
2026-05-25 HYS482 OTP → RMO May 25, 15:35 UTCMay 25, 16:00 UTC25m
2026-05-25 HYS246 BRU → OTP May 25, 11:35 UTCMay 25, 14:10 UTC2h 35m
2026-05-25 HYS245 OTP → BRU May 25, 08:05 UTCMay 25, 10:30 UTC2h 25m
2026-05-25 HYS481 RMO → OTP May 25, 05:05 UTCMay 25, 05:35 UTC30m
2026-05-24 HYM422 IST → RMO May 24, 20:05 UTCMay 25, 02:25 UTC6h 20m
2026-05-24 HYM421 RMO → IST May 24, 17:35 UTCMay 24, 18:25 UTC50m
2026-05-24 HYS446 BVA → RMO May 24, 13:50 UTCMay 24, 16:15 UTC2h 25m
2026-05-24 HYS225 BAY → BVA May 24, 10:40 UTCMay 24, 12:40 UTC2h 0m
2026-05-24 HYS226 BVA → BAY May 24, 07:35 UTCMay 24, 09:40 UTC2h 5m
2026-05-24 HYS445 RMO → BVA May 24, 04:30 UTCMay 24, 06:40 UTC2h 10m
2026-05-23 HYM412 STN → RMO May 23, 21:20 UTCMay 23, 23:45 UTC2h 25m
2026-05-23 HYM411 RMO → STN May 23, 16:45 UTCMay 23, 19:30 UTC2h 45m
2026-05-23 HYS482 OTP → RMO May 23, 15:00 UTCMay 23, 15:25 UTC25m
2026-05-23 HYS481 RMO → OTP May 23, 04:25 UTCMay 23, 04:40 UTC15m
2026-05-22 HYS492 VCE → RMO May 22, 19:35 UTCMay 22, 21:15 UTC1h 40m
2026-05-22 HYS491 RMO → VCE May 22, 17:00 UTCMay 22, 18:25 UTC1h 25m
2026-05-22 HYM404 DUS → RMO May 22, 13:25 UTCMay 22, 15:25 UTC2h 0m
2026-05-22 HYM403 RMO → DUS May 22, 09:35 UTCMay 22, 11:50 UTC2h 15m
2026-05-21 HYM458 TLV → RMO May 21, 20:40 UTCMay 21, 22:50 UTC2h 10m
2026-05-21 HYM457 RMO → TLV May 21, 17:40 UTCMay 21, 19:20 UTC1h 40m
2026-05-21 HYM422 IST → RMO May 21, 12:50 UTCMay 21, 13:30 UTC40m
2026-05-21 HYM421 RMO → IST May 21, 09:55 UTCMay 21, 10:35 UTC40m
2026-05-21 HYS482 OTP → RMO May 21, 06:10 UTCMay 21, 06:35 UTC25m
2026-05-21 HYS481 RMO → OTP May 21, 04:20 UTCMay 21, 04:40 UTC20m
2026-05-20 HYM458 TLV → RMO May 20, 21:35 UTCMay 20, 23:45 UTC2h 10m
2026-05-20 HYM457 RMO → TLV May 20, 17:35 UTCMay 20, 19:55 UTC2h 20m
2026-05-20 HYS482 OTP → RMO May 20, 15:45 UTCMay 20, 16:10 UTC25m
2026-05-20 HYS481 RMO → OTP May 20, 05:00 UTCMay 20, 05:30 UTC30m
2026-05-19 HYS446 BVA → RMO May 19, 13:20 UTCMay 19, 15:45 UTC2h 25m
2026-05-19 HYS445 RMO → BVA May 19, 09:30 UTCMay 19, 12:10 UTC2h 40m
2026-05-19 HYM422 IST → RMO May 19, 06:55 UTCMay 19, 07:35 UTC40m
2026-05-18 HYM458 TLV → RMO May 18, 21:20 UTCMay 19, 05:20 UTC8h 0m
2026-05-18 HYM457 RMO → TLV May 18, 17:30 UTCMay 18, 19:35 UTC2h 4m
2026-05-18 HYS482 OTP → RMO May 18, 15:35 UTCMay 18, 16:00 UTC25m
2026-05-18 HYS246 BRU → OTP May 18, 11:30 UTCMay 18, 13:50 UTC2h 20m

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 1h ago.
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, HYS474, HYS481, HYS473, HYM458.