Apparatus

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sensors Mode-S transponder

4B8C99

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-CDY · BEECH 400 Beechjet

Hex
4B8C99
Octal
22706231
Decimal
4,951,193
Country
TR
Tail
TC-CDY
Type
BE40
No current signal · last broadcast 1d ago
Flights observed
42
Distinct callsigns
0
Country
TR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4B8C99.

Country allocation

The ICAO 24-bit address 4B8C99 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.

Recent flights last 42

DateFlightRouteTakeoffLandingDuration
2026-07-18 QRJ01 - Jul 18, 00:25 UTCJul 18, 00:45 UTC20m
2026-07-17 QRJ01 - Jul 17, 22:55 UTCJul 17, 23:45 UTC50m
2026-07-17 QRJ01 - Jul 17, 20:55 UTCJul 17, 21:34 UTC40m
2026-07-11 QRJ01 - Jul 11, 09:05 UTCJul 11, 09:40 UTC35m
2026-07-11 QRJ01 - Jul 11, 07:40 UTCJul 11, 08:25 UTC45m
2026-07-07 QRJ01 - Jul 7, 18:35 UTCJul 7, 19:25 UTC50m
2026-07-05 QRJ01 - Jul 5, 23:25 UTCJul 6, 00:35 UTC1h 10m
2026-07-05 QRJ01 - Jul 5, 15:15 UTCJul 5, 15:30 UTC15m
2026-07-04 QRJ01 - Jul 4, 13:15 UTCJul 4, 14:05 UTC50m
2026-07-03 QRJ01 - Jul 3, 16:05 UTCJul 3, 17:50 UTC1h 45m
2026-07-03 QRJ01 - Jul 3, 11:45 UTCJul 3, 13:45 UTC2h 0m
2026-07-03 QRJ01 - Jul 3, 09:10 UTCJul 3, 10:00 UTC50m
2026-06-29 QRJ01 - Jun 29, 02:09 UTCJun 29, 03:25 UTC1h 15m
2026-06-26 QRJ01 - Jun 26, 18:09 UTCJun 26, 18:39 UTC30m
2026-06-26 QRJ01 - Jun 26, 15:49 UTCJun 26, 16:49 UTC1h 0m
2026-06-25 QRJ01 - Jun 25, 10:20 UTCJun 25, 12:40 UTC2h 20m
2026-06-25 QRJ01 - Jun 25, 07:34 UTCJun 25, 08:20 UTC45m
2026-06-22 QRJ01 BEG → BUD Jun 22, 16:29 UTCJun 22, 17:10 UTC40m
2026-06-21 QRJ01 - Jun 21, 13:34 UTCJun 21, 14:24 UTC50m
2026-06-20 QRJ01 - Jun 20, 17:49 UTCJun 20, 20:29 UTC2h 40m
2026-06-20 QRJ01 - Jun 20, 15:09 UTCJun 20, 15:44 UTC35m
2026-06-14 QRJ01 - Jun 14, 19:50 UTCJun 14, 20:50 UTC1h 0m
2026-06-12 QRJ01 - Jun 12, 10:50 UTCJun 12, 12:20 UTC1h 30m
2026-06-03 QRJ01 - Jun 3, 14:20 UTCJun 3, 15:10 UTC50m
2026-06-03 QRJ01 - Jun 3, 11:20 UTCJun 3, 13:05 UTC1h 45m
2026-06-03 QRJ01 OTP → LIN Jun 3, 07:25 UTCJun 3, 09:30 UTC2h 5m
2026-06-03 QRJ01 - Jun 3, 05:00 UTCJun 3, 05:50 UTC50m
2026-06-02 QRJ01 - Jun 2, 19:55 UTCJun 2, 20:30 UTC35m
2026-06-02 QRJ01 - Jun 2, 09:30 UTCJun 2, 10:00 UTC30m
2026-05-27 QRJ01 - May 27, 22:25 UTCMay 27, 23:10 UTC45m
2026-05-27 QRJ01 - May 27, 18:45 UTCMay 27, 19:35 UTC50m
2026-05-26 QRJ01 - May 26, 15:14 UTCMay 26, 16:40 UTC1h 25m
2026-05-24 QRJ01 - May 24, 15:50 UTCMay 24, 16:40 UTC50m
2026-05-24 QRJ01 SKG → CIA May 24, 12:45 UTCMay 24, 14:00 UTC1h 15m
2026-05-22 QRJ01 BEG → SKG May 22, 14:35 UTCMay 22, 15:25 UTC50m
2026-05-22 QRJ01 - May 22, 12:40 UTCMay 22, 13:50 UTC1h 10m
2026-05-22 QRJ01 - May 22, 09:15 UTCMay 22, 11:10 UTC1h 55m
2026-04-19 QRJ01 - Apr 19, 19:30 UTCApr 19, 20:20 UTC50m
2026-04-17 QRJ01 - Apr 17, 21:25 UTCApr 17, 21:50 UTC25m
2026-04-17 QRJ01 - Apr 17, 21:10 UTCApr 17, 21:20 UTC10m
2026-04-15 QRJ01 - Apr 15, 20:00 UTCApr 15, 20:15 UTC15m
2026-04-15 QRJ01 - Apr 15, 18:40 UTCApr 15, 19:00 UTC20m

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 TC-CDY page for operator, model, and routing details .

Mode-S 4B8C99 frequently asked

What is Mode-S code 4B8C99?
4B8C99 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-CDY.
Where is Mode-S 4B8C99 registered?
Mode-S code 4B8C99 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B8C99 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 4B8C99, octal 22706231, decimal 4,951,193.