Apparatus

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sensors Mode-S transponder

4A52E7

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-TWG

Hex
4A52E7
Octal
22451347
Decimal
4,870,887
Country
RO
Tail
YR-TWG
Type
EVSS
No current signal · last broadcast 3h ago
Flights observed
34
Distinct callsigns
1
Country
RO
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 4A52E7.

Country allocation

The ICAO 24-bit address 4A52E7 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 1 distinct

Callsign Airline Flights Last seen
YRTWG - 34 2026-04-18

Recent flights last 34

DateFlightRouteTakeoffLandingDuration
2026-04-18 YRTWG - Apr 18, 13:35 UTCApr 18, 14:30 UTC55m
2026-04-18 YRTWG - Apr 18, 09:45 UTCApr 18, 10:55 UTC1h 10m
2026-04-18 YRTWG - Apr 18, 07:35 UTCApr 18, 08:50 UTC1h 15m
2026-04-17 YRTWG - Apr 17, 17:05 UTCApr 17, 17:15 UTC10m
2026-04-17 YRTWG - Apr 17, 16:25 UTCApr 17, 16:45 UTC20m
2026-04-17 YRTWG - Apr 17, 15:20 UTCApr 17, 15:50 UTC30m
2026-04-17 YRTWG - Apr 17, 09:30 UTCApr 17, 09:40 UTC10m
2026-04-17 YRTWG - Apr 17, 07:50 UTCApr 17, 08:40 UTC50m
2026-04-17 YRTWG - Apr 17, 06:50 UTCApr 17, 07:05 UTC15m
2026-04-17 YRTWG - Apr 17, 06:30 UTCApr 17, 06:45 UTC15m
2026-04-17 YRTWG - Apr 17, 05:20 UTCApr 17, 05:30 UTC10m
2026-04-17 YRTWG - Apr 17, 04:50 UTCApr 17, 05:15 UTC25m
2026-04-16 YRTWG - Apr 16, 16:05 UTCApr 16, 16:35 UTC30m
2026-04-16 YRTWG - Apr 16, 15:15 UTCApr 16, 15:30 UTC15m
2026-04-16 YRTWG - Apr 16, 14:55 UTCApr 16, 15:10 UTC15m
2026-04-16 YRTWG - Apr 16, 13:15 UTCApr 16, 13:35 UTC20m
2026-04-16 YRTWG - Apr 16, 13:00 UTCApr 16, 13:05 UTC5m
2026-04-16 YRTWG - Apr 16, 11:25 UTCApr 16, 11:44 UTC20m
2026-04-16 YRTWG - Apr 16, 09:59 UTCApr 16, 10:19 UTC20m
2026-04-16 YRTWG - Apr 16, 09:10 UTCApr 16, 09:24 UTC15m
2026-04-16 YRTWG - Apr 16, 07:54 UTCApr 16, 09:05 UTC1h 10m
2026-04-16 YRTWG - Apr 16, 06:25 UTCApr 16, 07:05 UTC40m
2026-04-16 YRTWG - Apr 16, 05:09 UTCApr 16, 05:29 UTC20m
2026-04-15 YRTWG - Apr 15, 13:25 UTCApr 15, 14:15 UTC50m
2026-04-15 YRTWG - Apr 15, 11:00 UTCApr 15, 11:50 UTC50m
2026-04-15 YRTWG - Apr 15, 10:25 UTCApr 15, 10:55 UTC30m
2026-04-15 YRTWG - Apr 15, 07:01 UTCApr 15, 07:15 UTC15m
2026-04-15 YRTWG - Apr 15, 06:25 UTCApr 15, 06:55 UTC30m
2026-04-15 YRTWG - Apr 15, 05:00 UTCApr 15, 05:30 UTC30m
2026-04-15 YRTWG - Apr 15, 04:35 UTCApr 15, 04:50 UTC15m
2026-04-14 YRTWG - Apr 14, 16:50 UTCApr 14, 17:05 UTC15m
2026-04-14 YRTWG - Apr 14, 15:45 UTCApr 14, 16:15 UTC30m
2026-04-14 YRTWG - Apr 14, 07:30 UTCApr 14, 08:35 UTC1h 5m
2026-04-14 YRTWG - Apr 14, 05:55 UTCApr 14, 06:35 UTC40m

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

Mode-S 4A52E7 frequently asked

What is Mode-S code 4A52E7?
4A52E7 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-TWG.
Where is Mode-S 4A52E7 registered?
Mode-S code 4A52E7 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A52E7 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A52E7, octal 22451347, decimal 4,870,887.
What flights does 4A52E7 operate?
Mode-S 4A52E7 has broadcast 1 distinct callsign, including YRTWG.