Apparatus

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sensors Mode-S transponder

4B8506

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-AHF

Hex
4B8506
Octal
22702406
Decimal
4,949,254
Country
TR
Tail
TC-AHF
Type
DV20
No current signal · last broadcast 23h ago
Flights observed
61
Distinct callsigns
1
Country
TR
Last broadcast
23h ago

Last known position

Most recent position reported by Mode-S 4B8506.

Country allocation

The ICAO 24-bit address 4B8506 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
TCAHF - 59 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-22 TCAHF - Jun 22, 10:40 UTCJun 22, 11:19 UTC40m
2026-06-22 TCAHF - Jun 22, 07:45 UTCJun 22, 07:54 UTC10m
2026-06-22 TCAHF - Jun 22, 05:24 UTCJun 22, 05:34 UTC10m
2026-06-21 TCAHF - Jun 21, 12:24 UTCJun 21, 13:00 UTC35m
2026-06-21 TCAHF - Jun 21, 11:05 UTCJun 21, 11:40 UTC35m
2026-06-21 TCAHF - Jun 21, 09:49 UTCJun 21, 09:59 UTC10m
2026-06-21 TCAHF - Jun 21, 08:49 UTCJun 21, 09:15 UTC25m
2026-06-20 TCAHF - Jun 20, 11:09 UTCJun 20, 11:20 UTC10m
2026-06-20 TCAHF - Jun 20, 07:44 UTCJun 20, 07:54 UTC10m
2026-06-19 TCAHF - Jun 19, 11:14 UTCJun 19, 11:24 UTC10m
2026-06-19 TCAHF - Jun 19, 09:44 UTCJun 19, 10:39 UTC55m
2026-06-19 TCAHF - Jun 19, 07:59 UTCJun 19, 08:24 UTC25m
2026-06-18 TCAHF - Jun 18, 14:20 UTCJun 18, 14:30 UTC10m
2026-06-18 TCAHF - Jun 18, 13:25 UTCJun 18, 13:35 UTC10m
2026-06-17 TCAHF - Jun 17, 10:20 UTCJun 17, 11:05 UTC45m
2026-06-17 TCAHF - Jun 17, 08:25 UTCJun 17, 08:35 UTC10m
2026-06-16 TCAHF - Jun 16, 11:20 UTCJun 16, 11:30 UTC10m
2026-06-16 TCAHF - Jun 16, 09:00 UTCJun 16, 09:10 UTC10m
2026-06-16 TCAHF - Jun 16, 06:45 UTCJun 16, 06:54 UTC10m
2026-06-15 TCAHF - Jun 15, 12:55 UTCJun 15, 13:05 UTC10m
2026-06-15 TCAHF - Jun 15, 12:10 UTCJun 15, 12:19 UTC10m
2026-06-15 TCAHF - Jun 15, 10:15 UTCJun 15, 10:45 UTC30m
2026-06-15 TCAHF - Jun 15, 09:05 UTCJun 15, 09:40 UTC35m
2026-06-15 TCAHF - Jun 15, 06:45 UTCJun 15, 07:45 UTC1h 0m
2026-06-14 TCAHF - Jun 14, 12:55 UTCJun 14, 13:30 UTC35m
2026-06-14 TCAHF - Jun 14, 07:10 UTCJun 14, 07:20 UTC10m
2026-06-14 TCAHF - Jun 14, 05:15 UTCJun 14, 05:25 UTC10m
2026-06-11 TCAHF - Jun 11, 12:40 UTCJun 11, 13:55 UTC1h 15m
2026-06-11 TCAHF - Jun 11, 11:05 UTCJun 11, 11:40 UTC35m
2026-06-11 TCAHF - Jun 11, 09:55 UTCJun 11, 10:05 UTC10m
2026-06-11 TCAHF - Jun 11, 05:45 UTCJun 11, 05:55 UTC10m
2026-06-10 TCAHF - Jun 10, 11:25 UTCJun 10, 12:15 UTC50m
2026-06-10 TCAHF - Jun 10, 07:25 UTCJun 10, 07:50 UTC25m
2026-06-10 TCAHF - Jun 10, 05:30 UTCJun 10, 06:20 UTC50m
2026-06-08 TCAHF - Jun 8, 11:05 UTCJun 8, 11:20 UTC15m
2026-06-08 TCAHF - Jun 8, 05:35 UTCJun 8, 06:35 UTC1h 0m
2026-06-07 TCAHF - Jun 7, 15:55 UTCJun 7, 16:05 UTC10m
2026-06-07 TCAHF - Jun 7, 14:55 UTCJun 7, 15:05 UTC10m
2026-06-07 TCAHF - Jun 7, 11:50 UTCJun 7, 12:05 UTC15m
2026-06-07 TCAHF - Jun 7, 09:45 UTCJun 7, 10:00 UTC15m
2026-06-07 TCAHF - Jun 7, 05:45 UTCJun 7, 05:55 UTC10m
2026-06-06 - - Jun 6, 09:19 UTCJun 6, 09:30 UTC10m
2026-06-05 TCAHF - Jun 5, 09:20 UTCJun 5, 09:50 UTC30m
2026-06-04 TCAHF - Jun 4, 08:20 UTCJun 4, 08:30 UTC10m
2026-06-04 TCAHF - Jun 4, 05:55 UTCJun 4, 06:35 UTC40m
2026-06-03 TCAHF - Jun 3, 14:35 UTCJun 3, 14:45 UTC10m
2026-06-03 TCAHF - Jun 3, 11:45 UTCJun 3, 12:35 UTC50m
2026-06-03 - - Jun 3, 10:40 UTCJun 3, 11:05 UTC25m
2026-06-03 TCAHF - Jun 3, 09:10 UTCJun 3, 09:55 UTC45m
2026-06-02 TCAHF - Jun 2, 14:05 UTCJun 2, 14:20 UTC15m

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

Mode-S 4B8506 frequently asked

What is Mode-S code 4B8506?
4B8506 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-AHF.
Where is Mode-S 4B8506 registered?
Mode-S code 4B8506 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B8506 broadcasting right now?
No active broadcast right now. Last signal was 23h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B8506, octal 22702406, decimal 4,949,254.
What flights does 4B8506 operate?
Mode-S 4B8506 has broadcast 1 distinct callsign, including TCAHF.