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sensors Mode-S transponder

4B8509

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-AHI

Hex
4B8509
Octal
22702411
Decimal
4,949,257
Country
TR
Tail
TC-AHI
Type
DV20
No current signal · last broadcast Jul 26, 09:40 UTC
Flights observed
180
Distinct callsigns
1
Country
TR
Last broadcast
Jul 26, 09:40 UTC

Last known position

Most recent position reported by Mode-S 4B8509.

Country allocation

The ICAO 24-bit address 4B8509 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
TCAHI - 180 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TCAHI - Jul 26, 09:30 UTCJul 26, 09:40 UTC10m
2026-07-26 TCAHI - Jul 26, 08:05 UTCJul 26, 08:30 UTC25m
2026-07-24 TCAHI - Jul 24, 15:30 UTCJul 24, 16:40 UTC1h 10m
2026-07-24 TCAHI - Jul 24, 13:30 UTCJul 24, 14:40 UTC1h 10m
2026-07-22 TCAHI - Jul 22, 03:35 UTCJul 22, 05:20 UTC1h 45m
2026-07-21 TCAHI - Jul 21, 09:05 UTCJul 21, 10:00 UTC55m
2026-07-21 TCAHI - Jul 21, 06:30 UTCJul 21, 07:50 UTC1h 20m
2026-07-20 TCAHI - Jul 20, 13:15 UTCJul 20, 13:45 UTC30m
2026-07-20 TCAHI - Jul 20, 11:10 UTCJul 20, 11:45 UTC35m
2026-07-20 TCAHI - Jul 20, 09:00 UTCJul 20, 10:15 UTC1h 15m
2026-07-20 TCAHI - Jul 20, 07:20 UTCJul 20, 08:20 UTC1h 0m
2026-07-19 TCAHI - Jul 19, 12:10 UTCJul 19, 13:15 UTC1h 5m
2026-07-19 TCAHI - Jul 19, 10:25 UTCJul 19, 11:10 UTC45m
2026-07-19 TCAHI - Jul 19, 09:15 UTCJul 19, 09:50 UTC35m
2026-07-17 TCAHI - Jul 17, 11:45 UTCJul 17, 12:15 UTC30m
2026-07-17 TCAHI - Jul 17, 10:15 UTCJul 17, 10:25 UTC10m
2026-07-17 TCAHI - Jul 17, 07:05 UTCJul 17, 07:20 UTC15m
2026-07-17 TCAHI - Jul 17, 04:59 UTCJul 17, 05:10 UTC10m
2026-07-15 TCAHI - Jul 15, 10:50 UTCJul 15, 11:00 UTC10m
2026-07-15 TCAHI - Jul 15, 05:20 UTCJul 15, 05:30 UTC10m
2026-07-14 TCAHI - Jul 14, 09:40 UTCJul 14, 09:50 UTC10m
2026-07-13 TCAHI - Jul 13, 13:45 UTCJul 13, 14:00 UTC15m
2026-07-13 TCAHI - Jul 13, 11:15 UTCJul 13, 12:00 UTC45m
2026-07-13 TCAHI - Jul 13, 09:10 UTCJul 13, 10:20 UTC1h 10m
2026-07-12 TCAHI - Jul 12, 08:30 UTCJul 12, 09:35 UTC1h 5m
2026-07-12 TCAHI - Jul 12, 05:40 UTCJul 12, 06:50 UTC1h 10m
2026-07-11 TCAHI - Jul 11, 11:35 UTCJul 11, 12:05 UTC30m
2026-07-11 TCAHI - Jul 11, 09:10 UTCJul 11, 10:15 UTC1h 5m
2026-07-11 TCAHI - Jul 11, 07:05 UTCJul 11, 08:05 UTC1h 0m
2026-07-11 TCAHI - Jul 11, 05:01 UTCJul 11, 06:05 UTC1h 5m
2026-07-10 TCAHI - Jul 10, 13:15 UTCJul 10, 13:35 UTC20m
2026-07-10 TCAHI - Jul 10, 11:10 UTCJul 10, 11:30 UTC20m
2026-07-10 TCAHI - Jul 10, 08:25 UTCJul 10, 09:30 UTC1h 5m
2026-07-10 TCAHI - Jul 10, 06:15 UTCJul 10, 07:35 UTC1h 20m
2026-07-09 TCAHI - Jul 9, 13:35 UTCJul 9, 15:05 UTC1h 30m
2026-07-09 TCAHI - Jul 9, 10:40 UTCJul 9, 12:25 UTC1h 45m
2026-07-08 TCAHI - Jul 8, 07:40 UTCJul 8, 08:35 UTC55m
2026-07-08 TCAHI - Jul 8, 05:15 UTCJul 8, 06:10 UTC55m
2026-07-07 TCAHI - Jul 7, 10:15 UTCJul 7, 11:25 UTC1h 10m
2026-07-07 TCAHI - Jul 7, 07:35 UTCJul 7, 08:55 UTC1h 20m
2026-07-07 TCAHI - Jul 7, 04:45 UTCJul 7, 06:15 UTC1h 30m
2026-07-06 TCAHI - Jul 6, 12:40 UTCJul 6, 13:40 UTC1h 0m
2026-07-06 TCAHI - Jul 6, 09:55 UTCJul 6, 11:15 UTC1h 20m
2026-07-06 TCAHI - Jul 6, 07:25 UTCJul 6, 08:50 UTC1h 25m
2026-07-06 TCAHI - Jul 6, 05:00 UTCJul 6, 05:15 UTC15m
2026-07-05 TCAHI - Jul 5, 11:20 UTCJul 5, 12:20 UTC1h 0m
2026-07-05 TCAHI - Jul 5, 09:00 UTCJul 5, 10:10 UTC1h 10m
2026-07-05 TCAHI - Jul 5, 05:15 UTCJul 5, 05:25 UTC10m
2026-07-04 TCAHI - Jul 4, 13:35 UTCJul 4, 13:45 UTC10m
2026-07-04 TCAHI - Jul 4, 12:40 UTCJul 4, 13:30 UTC50m

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

Mode-S 4B8509 frequently asked

What is Mode-S code 4B8509?
4B8509 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-AHI.
Where is Mode-S 4B8509 registered?
Mode-S code 4B8509 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B8509 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 09:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B8509, octal 22702411, decimal 4,949,257.
What flights does 4B8509 operate?
Mode-S 4B8509 has broadcast 1 distinct callsign, including TCAHI.