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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
No current signal · last broadcast 9h ago
Flights observed
414
Distinct callsigns
20
Country
RO
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 4A29F9.

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 - 20 2026-07-08
HYS276 HiSky Europe 18 2026-07-05
HYS278 - 16 2026-07-08
HYS275 HiSky Europe 14 2026-07-05
HYS252 - 13 2026-07-05
HYS251 - 13 2026-07-05
HYS473 HiSky Europe 10 2026-05-31
HYS762 - 8 2026-07-13
HYS474 HiSky Europe 8 2026-05-31
HYS244 HiSky Europe 8 2026-05-20
HYS761 - 7 2026-07-14
HYS243 HiSky Europe 7 2026-05-20
HYM457 Himalayan Airlines 7 2026-05-19
HYS8813 - 6 2026-07-03
HYS5617 - 6 2026-06-27
HYS5513 - 6 2026-07-03
HYS254 - 6 2026-07-08
HYS253 - 6 2026-07-08
HYM458 Himalayan Airlines 6 2026-05-19
HYS8717 - 5 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 HYS761 - Jul 14, 07:25 UTCJul 14, 08:10 UTC45m
2026-07-14 HYS8248 - Jul 14, 04:55 UTCJul 14, 06:40 UTC1h 45m
2026-07-14 HYS8247 - Jul 14, 02:05 UTCJul 14, 03:35 UTC1h 30m
2026-07-13 HYS762 - Jul 13, 16:00 UTCJul 13, 16:45 UTC45m
2026-07-13 HYS256 - Jul 13, 14:30 UTCJul 13, 15:10 UTC40m
2026-07-13 HYS255 - Jul 13, 13:15 UTCJul 13, 13:45 UTC30m
2026-07-13 HYS7174 - Jul 13, 10:25 UTCJul 13, 11:50 UTC1h 25m
2026-07-13 HYS7173 - Jul 13, 07:30 UTCJul 13, 08:45 UTC1h 15m
2026-07-13 HYS761 - Jul 13, 05:31 UTCJul 13, 06:10 UTC40m
2026-07-13 HYS764 OTP → OMR Jul 13, 04:10 UTCJul 13, 05:01 UTC50m
2026-07-12 HYS258 DUB → OTP Jul 12, 23:00 UTCJul 13, 02:01 UTC3h 0m
2026-07-12 HYS257 - Jul 12, 18:20 UTCJul 12, 21:45 UTC3h 25m
2026-07-12 HYS256 - Jul 12, 15:50 UTCJul 12, 16:25 UTC35m
2026-07-12 HYS255 - Jul 12, 14:20 UTCJul 12, 14:55 UTC35m
2026-07-12 HYS763 - Jul 12, 12:30 UTCJul 12, 13:15 UTC45m
2026-07-12 HYS5922 AYT → OMR Jul 12, 06:35 UTCJul 12, 08:30 UTC1h 55m
2026-07-12 HYS5921 OMR → AYT Jul 12, 03:05 UTCJul 12, 05:10 UTC2h 5m
2026-07-11 HYS5680 - Jul 11, 20:30 UTCJul 11, 23:30 UTC3h 0m
2026-07-11 HYS5679 - Jul 11, 15:40 UTCJul 11, 18:30 UTC2h 50m
2026-07-11 HYS7679 OMR → OMR Jul 11, 07:05 UTCJul 11, 14:35 UTC7h 30m
2026-07-10 HYS8982 - Jul 10, 22:05 UTCJul 11, 00:05 UTC2h 0m
2026-07-10 HYS8981 - Jul 10, 18:40 UTCJul 10, 20:45 UTC2h 5m
2026-07-10 HYS762 - Jul 10, 17:10 UTCJul 10, 18:00 UTC50m
2026-07-10 HYS7582 - Jul 10, 13:55 UTCJul 10, 15:55 UTC2h 0m
2026-07-10 HYS7881 - Jul 10, 11:05 UTCJul 10, 12:45 UTC1h 40m
2026-07-10 HYS7882 - Jul 10, 08:15 UTCJul 10, 10:00 UTC1h 45m
2026-07-10 HYS7581 - Jul 10, 05:05 UTCJul 10, 07:10 UTC2h 5m
2026-07-09 HYS8462 EFL → OTP Jul 9, 20:45 UTCJul 9, 22:00 UTC1h 15m
2026-07-09 HYS7473 - Jul 9, 15:20 UTCJul 9, 17:00 UTC1h 40m
2026-07-09 HYS7474 - Jul 9, 03:55 UTCJul 9, 05:15 UTC1h 20m
2026-07-09 HYS8461 - Jul 9, 01:25 UTCJul 9, 02:50 UTC1h 25m
2026-07-08 HYS7382 - Jul 8, 19:45 UTCJul 8, 21:45 UTC2h 0m
2026-07-08 HYS7386 - Jul 8, 12:55 UTCJul 8, 18:40 UTC5h 45m
2026-07-08 HYS7381 - Jul 8, 09:50 UTCJul 8, 11:55 UTC2h 5m
2026-07-08 HYS254 - Jul 8, 08:00 UTCJul 8, 08:40 UTC40m
2026-07-08 HYS253 - Jul 8, 06:35 UTCJul 8, 07:10 UTC35m
2026-07-08 HYS277 - Jul 8, 05:00 UTCJul 8, 05:30 UTC30m
2026-07-08 HYS278 - Jul 8, 03:35 UTCJul 8, 04:05 UTC30m
2026-07-07 HYS258 DUB → OTP Jul 7, 22:20 UTCJul 8, 01:15 UTC2h 55m
2026-07-07 HYS257 - Jul 7, 17:40 UTCJul 7, 21:15 UTC3h 35m
2026-07-07 HYS761 - Jul 7, 07:20 UTCJul 7, 08:05 UTC45m
2026-07-07 HYS8248 - Jul 7, 04:50 UTCJul 7, 06:35 UTC1h 45m
2026-07-07 HYS8247 - Jul 7, 02:00 UTCJul 7, 03:35 UTC1h 35m
2026-07-06 HYS762 - Jul 6, 16:05 UTCJul 6, 16:50 UTC45m
2026-07-06 HYS7174 - Jul 6, 11:05 UTCJul 6, 12:15 UTC1h 10m
2026-07-06 HYS7173 - Jul 6, 08:10 UTCJul 6, 09:20 UTC1h 10m
2026-07-06 HYS254 - Jul 6, 06:45 UTCJul 6, 07:20 UTC35m
2026-07-06 HYS253 - Jul 6, 05:05 UTCJul 6, 05:40 UTC35m
2026-07-06 HYS277 - Jul 6, 03:40 UTCJul 6, 04:15 UTC35m
2026-07-05 HYS252 - Jul 5, 23:20 UTCJul 6, 01:55 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 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?
No active broadcast right now. Last signal was 9h ago.
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, HYS252.