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sensors Mode-S transponder

4A29F9

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-JOY · AIRBUS A-320

Hex
4A29F9
Octal
22424771
Decimal
4,860,409
Country
RO
Tail
YR-JOY
Type
A320
Broadcasting now · callsign HYS5514 · 34,000 ft
Flights observed
476
Distinct callsigns
20
Country
RO
Last broadcast
Jul 26, 22:15 UTC

Current position

4A29F9 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4A29F9 falls within the block assigned to Romania (RO) by ICAO Annex 10, Volume III. Every aircraft registered in Romania 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
HYS277 HiSky Europe 22 2026-07-22
HYS276 HiSky Europe 21 2026-07-26
HYS278 - 18 2026-07-17
HYS275 HiSky Europe 17 2026-07-26
HYS251 HiSky Europe 17 2026-07-26
HYS252 HiSky Europe 16 2026-07-23
HYS473 HiSky Europe 10 2026-05-31
HYS8813 - 9 2026-07-24
HYS762 - 8 2026-07-13
HYS474 HiSky Europe 8 2026-05-31
HYS244 HiSky Europe 8 2026-05-20
HYS761 - 7 2026-07-14
HYS5617 - 7 2026-07-25
HYS5513 - 7 2026-07-24
HYS243 HiSky Europe 7 2026-05-20
HYM457 Himalayan Airlines 7 2026-05-19
HYS7998 - 6 2026-07-20
HYS7617 - 6 2026-07-25
HYS254 - 6 2026-07-08
HYS253 - 6 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HYS251 CLJ → DUB Jul 26, 18:55 UTCJul 26, 22:15 UTC3h 20m
2026-07-26 HYS276 OTP → CLJ Jul 26, 17:05 UTCJul 26, 17:35 UTC30m
2026-07-26 HYS275 CLJ → OTP Jul 26, 15:45 UTCJul 26, 16:20 UTC35m
2026-07-26 HYS8718 - Jul 26, 06:05 UTCJul 26, 13:25 UTC7h 21m
2026-07-25 HYS7617 - Jul 25, 10:40 UTCJul 25, 18:30 UTC7h 50m
2026-07-25 HYS5617 - Jul 25, 02:10 UTCJul 25, 09:30 UTC7h 20m
2026-07-24 HYS8813 - Jul 24, 13:35 UTCJul 24, 20:45 UTC7h 10m
2026-07-24 HYS8813 - Jul 24, 12:45 UTCJul 24, 13:30 UTC45m
2026-07-24 HYS5513 - Jul 24, 05:30 UTCJul 24, 12:40 UTC7h 10m
2026-07-23 HYS252 DUB → CLJ Jul 23, 23:00 UTCJul 24, 01:40 UTC2h 40m
2026-07-23 HYS251 CLJ → DUB Jul 23, 18:50 UTCJul 23, 21:50 UTC3h 0m
2026-07-23 HYS5408 - Jul 23, 13:20 UTCJul 23, 15:40 UTC2h 20m
2026-07-23 HYS5407 CLJ → PMI Jul 23, 08:45 UTCJul 23, 11:30 UTC2h 45m
2026-07-23 HYS7974 - Jul 23, 04:55 UTCJul 23, 06:20 UTC1h 25m
2026-07-23 HYS7973 - Jul 23, 02:15 UTCJul 23, 03:45 UTC1h 30m
2026-07-22 HYS7344 - Jul 22, 22:10 UTCJul 22, 23:45 UTC1h 35m
2026-07-22 HYS7345 - Jul 22, 19:25 UTCJul 22, 20:40 UTC1h 15m
2026-07-22 HYS7346 - Jul 22, 16:05 UTCJul 22, 17:35 UTC1h 30m
2026-07-22 HYS7343 CLJ → HER Jul 22, 13:20 UTCJul 22, 14:50 UTC1h 30m
2026-07-22 HYS5384 - Jul 22, 11:25 UTCJul 22, 12:10 UTC45m
2026-07-22 HYS277 CLJ → OTP Jul 22, 03:50 UTCJul 22, 04:25 UTC35m
2026-07-21 HYS5284 MIR → CLJ Jul 21, 22:10 UTCJul 21, 23:55 UTC1h 45m
2026-07-21 HYS7283 - Jul 21, 18:50 UTCJul 21, 20:55 UTC2h 5m
2026-07-21 HYS7284 - Jul 21, 15:50 UTCJul 21, 17:45 UTC1h 55m
2026-07-21 HYS5283 - Jul 21, 12:25 UTCJul 21, 14:30 UTC2h 5m
2026-07-21 HYS7234 - Jul 21, 09:35 UTCJul 21, 11:20 UTC1h 45m
2026-07-21 HYS7233 CLJ → RHO Jul 21, 05:55 UTCJul 21, 07:35 UTC1h 40m
2026-07-21 HYM318 - Jul 21, 01:40 UTCJul 21, 04:45 UTC3h 5m
2026-07-20 HYM317 - Jul 20, 23:00 UTCJul 21, 00:40 UTC1h 40m
2026-07-20 HYS021 - Jul 20, 21:25 UTCJul 20, 21:55 UTC30m
2026-07-20 HYS5184 - Jul 20, 18:05 UTCJul 20, 19:55 UTC1h 50m
2026-07-20 HYS5183 - Jul 20, 14:50 UTCJul 20, 16:50 UTC2h 0m
2026-07-20 HYS7998 - Jul 20, 11:20 UTCJul 20, 13:25 UTC2h 5m
2026-07-20 HYS7997 - Jul 20, 07:20 UTCJul 20, 09:30 UTC2h 10m
2026-07-19 HYS252 DUB → CLJ Jul 19, 23:20 UTCJul 20, 02:05 UTC2h 45m
2026-07-19 HYS251 CLJ → DUB Jul 19, 18:50 UTCJul 19, 21:55 UTC3h 5m
2026-07-19 HYS276 OTP → CLJ Jul 19, 17:10 UTCJul 19, 17:40 UTC30m
2026-07-19 HYS275 CLJ → OTP Jul 19, 15:40 UTCJul 19, 16:10 UTC30m
2026-07-19 HYS8718 - Jul 19, 06:05 UTCJul 19, 13:30 UTC7h 25m
2026-07-18 HYS7618 - Jul 18, 10:45 UTCJul 18, 17:40 UTC6h 55m
2026-07-18 HYS5618 - Jul 18, 02:05 UTCJul 18, 09:30 UTC7h 26m
2026-07-17 HYS5514 - Jul 17, 19:00 UTCJul 17, 21:39 UTC2h 40m
2026-07-17 HYS8813 - Jul 17, 14:15 UTCJul 17, 16:49 UTC2h 35m
2026-07-17 HYS8814 - Jul 17, 06:25 UTCJul 17, 13:25 UTC7h 0m
2026-07-17 HYS278 - Jul 17, 04:49 UTCJul 17, 05:20 UTC30m
2026-07-17 HYS277 CLJ → OTP Jul 17, 03:14 UTCJul 17, 03:45 UTC30m
2026-07-16 HYS252 - Jul 16, 23:05 UTCJul 17, 01:45 UTC2h 40m
2026-07-16 HYS251 - Jul 16, 18:44 UTCJul 16, 21:45 UTC3h 0m
2026-07-16 HYS5472 - Jul 16, 12:30 UTCJul 16, 14:40 UTC2h 10m
2026-07-16 HYS5471 - Jul 16, 09:10 UTCJul 16, 11:10 UTC2h 0m

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 YR-JOY page for operator, model, and routing details .

Mode-S 4A29F9 frequently asked

What is Mode-S code 4A29F9?
4A29F9 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-JOY.
Where is Mode-S 4A29F9 registered?
Mode-S code 4A29F9 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A29F9 broadcasting right now?
Yes. Mode-S 4A29F9 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A29F9, octal 22424771, decimal 4,860,409.
What flights does 4A29F9 operate?
Mode-S 4A29F9 has broadcast 20 distinct callsigns, including HYS277, HYS276, HYS278, HYS275, HYS251.