Apparatus

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sensors Mode-S transponder

4B8503

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-AHC

Hex
4B8503
Octal
22702403
Decimal
4,949,251
Country
TR
Tail
TC-AHC
Type
DV20
No current signal · last broadcast 8d ago
Flights observed
106
Distinct callsigns
1
Country
TR
Last broadcast
8d ago

Last known position

Most recent position reported by Mode-S 4B8503.

Country allocation

The ICAO 24-bit address 4B8503 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
TCAHC - 106 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TCAHC - Jul 26, 05:30 UTCJul 26, 06:20 UTC50m
2026-07-24 TCAHC - Jul 24, 11:00 UTCJul 24, 11:10 UTC10m
2026-07-24 TCAHC - Jul 24, 09:10 UTCJul 24, 09:20 UTC10m
2026-07-24 TCAHC - Jul 24, 05:55 UTCJul 24, 06:05 UTC10m
2026-07-23 TCAHC - Jul 23, 15:10 UTCJul 23, 15:50 UTC40m
2026-07-23 TCAHC - Jul 23, 13:25 UTCJul 23, 13:35 UTC10m
2026-07-21 TCAHC - Jul 21, 12:20 UTCJul 21, 12:30 UTC10m
2026-07-21 TCAHC - Jul 21, 07:45 UTCJul 21, 08:30 UTC45m
2026-07-21 TCAHC - Jul 21, 06:10 UTCJul 21, 06:35 UTC25m
2026-07-21 TCAHC - Jul 21, 04:15 UTCJul 21, 04:45 UTC30m
2026-07-20 TCAHC - Jul 20, 12:10 UTCJul 20, 12:45 UTC35m
2026-07-20 TCAHC - Jul 20, 10:30 UTCJul 20, 11:05 UTC35m
2026-07-20 TCAHC - Jul 20, 04:50 UTCJul 20, 05:40 UTC50m
2026-07-19 TCAHC - Jul 19, 04:20 UTCJul 19, 05:00 UTC40m
2026-07-18 TCAHC - Jul 18, 07:15 UTCJul 18, 07:35 UTC20m
2026-07-18 TCAHC - Jul 18, 06:15 UTCJul 18, 06:30 UTC15m
2026-07-18 TCAHC - Jul 18, 03:20 UTCJul 18, 04:10 UTC50m
2026-07-17 TCAHC - Jul 17, 03:45 UTCJul 17, 03:55 UTC10m
2026-07-16 TCAHC - Jul 16, 04:25 UTCJul 16, 04:35 UTC10m
2026-07-15 TCAHC - Jul 15, 04:50 UTCJul 15, 05:40 UTC50m
2026-07-13 TCAHC - Jul 13, 09:30 UTCJul 13, 09:40 UTC10m
2026-07-13 TCAHC - Jul 13, 07:05 UTCJul 13, 07:15 UTC10m
2026-07-12 TCAHC - Jul 12, 13:01 UTCJul 12, 13:10 UTC10m
2026-07-12 TCAHC - Jul 12, 11:20 UTCJul 12, 11:40 UTC20m
2026-07-12 TCAHC - Jul 12, 09:55 UTCJul 12, 10:35 UTC40m
2026-07-12 TCAHC - Jul 12, 08:40 UTCJul 12, 09:00 UTC20m
2026-07-11 TCAHC - Jul 11, 13:10 UTCJul 11, 13:20 UTC10m
2026-07-11 TCAHC - Jul 11, 11:40 UTCJul 11, 12:15 UTC35m
2026-07-11 TCAHC - Jul 11, 07:55 UTCJul 11, 08:05 UTC10m
2026-07-11 TCAHC - Jul 11, 05:10 UTCJul 11, 05:31 UTC20m
2026-07-10 TCAHC - Jul 10, 11:25 UTCJul 10, 11:40 UTC15m
2026-07-10 TCAHC - Jul 10, 08:40 UTCJul 10, 09:20 UTC40m
2026-07-10 TCAHC - Jul 10, 05:55 UTCJul 10, 06:20 UTC25m
2026-07-09 TCAHC - Jul 9, 05:55 UTCJul 9, 06:35 UTC40m
2026-07-08 TCAHC - Jul 8, 11:20 UTCJul 8, 11:30 UTC10m
2026-07-08 TCAHC - Jul 8, 09:25 UTCJul 8, 09:50 UTC25m
2026-07-08 TCAHC - Jul 8, 06:55 UTCJul 8, 08:00 UTC1h 5m
2026-07-08 TCAHC - Jul 8, 04:55 UTCJul 8, 06:10 UTC1h 15m
2026-07-07 TCAHC - Jul 7, 07:25 UTCJul 7, 08:15 UTC50m
2026-07-07 TCAHC - Jul 7, 05:00 UTCJul 7, 06:05 UTC1h 5m
2026-07-03 TCAHC - Jul 3, 08:20 UTCJul 3, 09:30 UTC1h 10m
2026-07-03 TCAHC - Jul 3, 06:00 UTCJul 3, 07:00 UTC1h 0m
2026-07-03 TCAHC - Jul 3, 04:00 UTCJul 3, 05:20 UTC1h 20m
2026-07-02 TCAHC - Jul 2, 16:25 UTCJul 2, 17:50 UTC1h 25m
2026-07-02 TCAHC - Jul 2, 14:50 UTCJul 2, 15:45 UTC55m
2026-07-02 TCAHC - Jul 2, 10:40 UTCJul 2, 11:35 UTC55m
2026-07-02 TCAHC - Jul 2, 09:00 UTCJul 2, 09:30 UTC30m
2026-07-01 TCAHC - Jul 1, 13:50 UTCJul 1, 14:50 UTC1h 0m
2026-07-01 TCAHC - Jul 1, 10:50 UTCJul 1, 12:40 UTC1h 50m
2026-07-01 TCAHC - Jul 1, 06:30 UTCJul 1, 07:25 UTC55m

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

Mode-S 4B8503 frequently asked

What is Mode-S code 4B8503?
4B8503 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-AHC.
Where is Mode-S 4B8503 registered?
Mode-S code 4B8503 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B8503 broadcasting right now?
No active broadcast right now. Last signal was 8d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B8503, octal 22702403, decimal 4,949,251.
What flights does 4B8503 operate?
Mode-S 4B8503 has broadcast 1 distinct callsign, including TCAHC.