sensors Mode-S transponder

4BC899

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to RC-RDY · AIRBUS A-321neo

Hex
4BC899
Octal
22744231
Decimal
4,966,553
Country
TR
Tail
RC-RDY
Type
A21N
No current signal · last broadcast 1d ago
Flights observed
7
Distinct callsigns
4
Country
TR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4BC899.

Country allocation

The ICAO 24-bit address 4BC899 falls within the block assigned to Turkey (TR) by ICAO Annex 10, Volume III. Every aircraft registered in Turkey 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 4 distinct

Callsign Airline Flights Last seen
PGT30XR - 3 2026-04-13
PGT5BM Pegasus Airlines 2 2026-04-13
PGT4259 - 1 2026-04-13
PGT4258 - 1 2026-04-12

Recent flights last 7

DateFlightRouteTakeoffLandingDuration
2026-04-13 PGT30XR - Apr 13, 16:15 UTCApr 13, 17:30 UTC1h 15m
2026-04-13 PGT30XR - Apr 13, 15:50 UTCApr 13, 17:30 UTC1h 40m
2026-04-13 PGT30XR - Apr 13, 13:50 UTCApr 13, 16:15 UTC2h 25m
2026-04-13 PGT5BM SAW → SVQ Apr 13, 11:55 UTCApr 13, 12:20 UTC25m
2026-04-13 PGT5BM SAW → SVQ Apr 13, 08:25 UTCApr 13, 12:15 UTC3h 50m
2026-04-13 PGT4259 - Apr 13, 02:10 UTCApr 13, 02:20 UTC10m
2026-04-12 PGT4258 - Apr 12, 20:05 UTCApr 12, 20:15 UTC10m

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 RC-RDY page for operator, model, and routing details .

Mode-S 4BC899 frequently asked

What is Mode-S code 4BC899?
4BC899 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to RC-RDY.
Where is Mode-S 4BC899 registered?
Mode-S code 4BC899 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BC899 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BC899, octal 22744231, decimal 4,966,553.
What flights does 4BC899 operate?
Mode-S 4BC899 has broadcast 4 distinct callsigns, including PGT30XR, PGT5BM, PGT4259, PGT4258.