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sensors Mode-S transponder

4A0484

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-ADD

Hex
4A0484
Octal
22402204
Decimal
4,850,820
Country
RO
Tail
YR-ADD
Type
A320
Broadcasting now · callsign LBT599 · 37,025 ft
Flights observed
6
Distinct callsigns
5
Country
RO
Last broadcast
11m ago

Current position

4A0484 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4A0484 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 5 distinct

Callsign Airline Flights Last seen
DIR2402 - 2 2026-05-08
LBT599 Nouvelair 1 2026-05-10
LBT598P - 1 2026-05-10
LBT598 Nouvelair 1 2026-05-10
DIR2401 - 1 2026-05-07

Recent flights last 6

DateFlightRouteTakeoffLandingDuration
2026-05-10 LBT599 LYS → TUN May 10, 08:25 UTCMay 10, 09:00 UTC35m
2026-05-10 LBT598 TUN → LYS May 10, 05:45 UTCMay 10, 07:04 UTC1h 20m
2026-05-10 LBT598P - May 10, 01:55 UTCMay 10, 03:45 UTC1h 50m
2026-05-08 DIR2402 - May 8, 22:10 UTCMay 8, 22:25 UTC15m
2026-05-07 DIR2401 - May 7, 12:15 UTCMay 7, 12:30 UTC15m
2026-04-13 DIR2402 - Apr 13, 22:35 UTCApr 13, 22:50 UTC15m

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-ADD page for operator, model, and routing details .

Mode-S 4A0484 frequently asked

What is Mode-S code 4A0484?
4A0484 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-ADD.
Where is Mode-S 4A0484 registered?
Mode-S code 4A0484 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A0484 broadcasting right now?
Yes. Mode-S 4A0484 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A0484, octal 22402204, decimal 4,850,820.
What flights does 4A0484 operate?
Mode-S 4A0484 has broadcast 5 distinct callsigns, including DIR2402, LBT599, LBT598P, LBT598, DIR2401.