Apparatus

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sensors Mode-S transponder

4B91B2

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-DMR · HAWKER BEECHCRAFT Hawker 750/850

Hex
4B91B2
Octal
22710662
Decimal
4,952,498
Country
TR
Tail
TC-DMR
Type
H25B
No current signal · last broadcast 7d ago
Flights observed
75
Distinct callsigns
1
Country
TR
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 4B91B2.

Country allocation

The ICAO 24-bit address 4B91B2 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 1 distinct

Callsign Airline Flights Last seen
TCDMR - 75 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 TCDMR - Jul 24, 12:05 UTCJul 24, 20:40 UTC8h 35m
2026-07-23 TCDMR - Jul 23, 15:50 UTCJul 24, 13:00 UTC21h 10m
2026-07-20 TCDMR - Jul 20, 14:15 UTCJul 20, 19:00 UTC4h 45m
2026-07-20 TCDMR - Jul 20, 04:50 UTCJul 20, 09:35 UTC4h 45m
2026-07-18 TCDMR - Jul 18, 18:45 UTCJul 18, 21:55 UTC3h 10m
2026-07-18 TCDMR - Jul 18, 15:25 UTCJul 18, 17:30 UTC2h 5m
2026-07-16 TCDMR - Jul 16, 12:00 UTCJul 16, 19:30 UTC7h 30m
2026-07-15 TCDMR - Jul 15, 20:50 UTCJul 16, 00:30 UTC3h 40m
2026-07-15 TCDMR - Jul 15, 18:50 UTCJul 15, 19:15 UTC25m
2026-07-14 TCDMR - Jul 14, 16:25 UTCJul 14, 19:05 UTC2h 40m
2026-07-14 TCDMR - Jul 14, 13:35 UTCJul 14, 15:25 UTC1h 50m
2026-07-14 TCDMR - Jul 14, 09:50 UTCJul 14, 12:50 UTC3h 0m
2026-07-11 TCDMR JMK → ISL Jul 11, 13:10 UTCJul 11, 14:00 UTC50m
2026-07-11 TCDMR - Jul 11, 07:35 UTCJul 11, 12:10 UTC4h 35m
2026-07-10 TCDMR - Jul 10, 11:25 UTCJul 10, 16:00 UTC4h 35m
2026-07-06 TCDMR - Jul 6, 13:30 UTCJul 6, 14:40 UTC1h 10m
2026-07-06 TCDMR - Jul 6, 11:15 UTCJul 6, 12:45 UTC1h 30m
2026-07-05 TCDMR - Jul 5, 05:45 UTCJul 5, 08:30 UTC2h 45m
2026-07-04 TCDMR - Jul 4, 06:35 UTCJul 4, 10:05 UTC3h 30m
2026-07-02 TCDMR - Jul 2, 12:00 UTCJul 2, 14:00 UTC2h 0m
2026-07-01 TCDMR - Jul 1, 01:10 UTCJul 1, 03:40 UTC2h 30m
2026-06-29 TCDMR - Jun 29, 15:39 UTCJun 29, 18:30 UTC2h 50m
2026-06-28 TCDMR - Jun 28, 18:34 UTCJun 29, 18:30 UTC23h 55m
2026-06-28 TCDMR - Jun 28, 17:30 UTCJun 29, 16:29 UTC23h 0m
2026-06-28 TCDMR ECN → AYT Jun 28, 15:55 UTCJun 28, 16:35 UTC40m
2026-06-28 TCDMR - Jun 28, 13:29 UTCJun 28, 14:04 UTC35m
2026-06-28 TCDMR BUS → VAS Jun 28, 10:44 UTCJun 28, 11:25 UTC40m
2026-06-26 TCDMR - Jun 26, 20:34 UTCJun 26, 20:40 UTC5m
2026-06-26 TCDMR - Jun 26, 19:14 UTCJun 26, 19:45 UTC30m
2026-06-21 TCDMR - Jun 21, 14:19 UTCJun 21, 15:30 UTC1h 10m
2026-06-20 TCDMR - Jun 20, 23:39 UTCJun 21, 00:40 UTC1h 0m
2026-06-20 TCDMR - Jun 20, 21:49 UTCJun 20, 22:39 UTC50m
2026-06-20 TCDMR - Jun 20, 19:49 UTCJun 20, 20:45 UTC55m
2026-06-20 TCDMR - Jun 20, 17:24 UTCJun 20, 18:19 UTC55m
2026-06-20 TCDMR - Jun 20, 14:35 UTCJun 20, 15:49 UTC1h 15m
2026-06-14 TCDMR - Jun 14, 18:35 UTCJun 14, 19:45 UTC1h 10m
2026-06-13 TCDMR - Jun 13, 10:05 UTCJun 13, 11:20 UTC1h 15m
2026-06-12 TCDMR - Jun 12, 12:40 UTCJun 12, 16:30 UTC3h 50m
2026-06-12 TCDMR - Jun 12, 06:45 UTCJun 12, 10:50 UTC4h 5m
2026-06-11 TCDMR - Jun 11, 16:25 UTCJun 11, 17:35 UTC1h 10m
2026-06-11 TCDMR - Jun 11, 14:55 UTCJun 11, 15:50 UTC55m
2026-06-11 TCDMR - Jun 11, 11:55 UTCJun 11, 13:55 UTC2h 0m
2026-06-09 TCDMR - Jun 9, 10:30 UTCJun 9, 13:20 UTC2h 50m
2026-06-09 TCDMR ISL → LBG Jun 9, 06:05 UTCJun 9, 09:25 UTC3h 20m
2026-06-03 TCDMR - Jun 3, 12:35 UTCJun 3, 12:55 UTC20m
2026-05-30 TCDMR - May 30, 14:10 UTCMay 30, 15:50 UTC1h 40m
2026-05-30 TCDMR - May 30, 08:40 UTCMay 30, 10:10 UTC1h 30m
2026-05-26 TCDMR - May 26, 18:30 UTCMay 26, 19:05 UTC35m
2026-05-26 TCDMR - May 26, 16:30 UTCMay 26, 17:39 UTC1h 10m
2026-05-25 TCDMR - May 25, 15:40 UTCMay 25, 16:20 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 TC-DMR page for operator, model, and routing details .

Mode-S 4B91B2 frequently asked

What is Mode-S code 4B91B2?
4B91B2 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-DMR.
Where is Mode-S 4B91B2 registered?
Mode-S code 4B91B2 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B91B2 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B91B2, octal 22710662, decimal 4,952,498.
What flights does 4B91B2 operate?
Mode-S 4B91B2 has broadcast 1 distinct callsign, including TCDMR.