Apparatus

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sensors Mode-S transponder

4BAA66

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-JSF · AIRBUS A-321

Hex
4BAA66
Octal
22725146
Decimal
4,958,822
Country
TR
Tail
TC-JSF
Type
A321
No current signal · last broadcast 7h ago
Flights observed
242
Distinct callsigns
20
Country
TR
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 4BAA66.

Country allocation

The ICAO 24-bit address 4BAA66 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 20 distinct

Callsign Airline Flights Last seen
THY3DN - 7 2026-06-26
THY8CD - 6 2026-06-30
THY2CV Turkish Airlines 5 2026-05-07
THY1VR - 4 2026-07-08
THY1GH - 4 2026-07-12
THY6CN Turkish Airlines 3 2026-05-26
THY5HQ Turkish Airlines 3 2026-05-27
THY4ZG Turkish Airlines 3 2026-06-10
THY4YJ Turkish Airlines 3 2026-05-07
THY3ZY Turkish Airlines 3 2026-06-10
THY3VM - 3 2026-07-12
THY1SL Turkish Airlines 3 2026-05-30
THY9JC - 2 2026-06-17
THY80N Turkish Airlines 2 2026-05-22
THY7CG Turkish Airlines 2 2026-05-16
THY6XB - 2 2026-06-14
THY6BA Turkish Airlines 2 2026-04-15
THY5YA - 2 2026-07-02
THY5UW Turkish Airlines 2 2026-04-14
THY5JN - 2 2026-06-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 THY1RK - Jul 13, 15:20 UTCJul 13, 19:30 UTC4h 10m
2026-07-13 THY3173 - Jul 13, 09:35 UTCJul 13, 09:55 UTC20m
2026-07-12 THY1GH - Jul 12, 06:55 UTCJul 12, 16:30 UTC9h 35m
2026-07-12 THY3VM - Jul 12, 00:45 UTCJul 12, 02:35 UTC1h 50m
2026-07-11 THY1GH - Jul 11, 07:15 UTCJul 11, 15:35 UTC8h 20m
2026-07-10 THY1HC - Jul 10, 17:45 UTCJul 10, 20:40 UTC2h 55m
2026-07-10 THY1GH - Jul 10, 06:55 UTCJul 10, 16:10 UTC9h 15m
2026-07-09 THY7DB - Jul 9, 16:50 UTCJul 10, 00:35 UTC7h 45m
2026-07-08 THY5LS - Jul 8, 23:35 UTCJul 9, 12:15 UTC12h 40m
2026-07-08 THY1VR - Jul 8, 12:00 UTCJul 8, 20:20 UTC8h 20m
2026-07-07 THY1GH - Jul 7, 06:10 UTCJul 7, 19:20 UTC13h 10m
2026-07-06 THY3DW - Jul 6, 07:35 UTCJul 6, 08:10 UTC35m
2026-07-05 THY3DW - Jul 5, 23:45 UTCJul 6, 04:10 UTC4h 25m
2026-07-05 THY7HE - Jul 5, 15:30 UTCJul 5, 18:15 UTC2h 45m
2026-07-05 THY1ZL - Jul 5, 11:00 UTCJul 5, 14:00 UTC3h 0m
2026-07-05 THY1950 - Jul 5, 05:40 UTCJul 5, 08:25 UTC2h 45m
2026-07-04 THY1949 - Jul 4, 16:55 UTCJul 4, 20:10 UTC3h 15m
2026-07-04 THY3JW - Jul 4, 14:20 UTCJul 4, 15:15 UTC55m
2026-07-03 THY3006 - Jul 3, 19:00 UTCJul 4, 05:30 UTC10h 30m
2026-07-03 THY4UA - Jul 3, 15:00 UTCJul 3, 15:50 UTC50m
2026-07-02 THY3VM - Jul 2, 23:00 UTCJul 3, 02:20 UTC3h 20m
2026-07-02 THY4HA - Jul 2, 17:50 UTCJul 2, 20:55 UTC3h 5m
2026-07-02 THY4VX - Jul 2, 15:25 UTCJul 2, 16:10 UTC45m
2026-07-02 THY1WS IST → ADB Jul 2, 13:30 UTCJul 2, 14:05 UTC35m
2026-07-02 THY1FX - Jul 2, 10:30 UTCJul 2, 11:05 UTC35m
2026-07-02 THY1PG - Jul 2, 08:10 UTCJul 2, 08:35 UTC25m
2026-07-02 THY5YA - Jul 2, 04:45 UTCJul 2, 05:40 UTC55m
2026-07-01 THY9JE IST → KFS Jul 1, 04:55 UTCJul 1, 14:45 UTC9h 50m
2026-06-30 THY8CD - Jun 30, 16:45 UTCJul 1, 02:40 UTC9h 55m
2026-06-29 THY217 SAW → RUH Jun 29, 17:40 UTCJun 30, 04:10 UTC10h 31m
2026-06-28 THY8CD - Jun 28, 16:55 UTCJun 29, 02:59 UTC10h 5m
2026-06-27 THY3ET - Jun 27, 23:14 UTCJun 28, 02:34 UTC3h 20m
2026-06-27 THY8LY - Jun 27, 17:39 UTCJun 27, 21:25 UTC3h 45m
2026-06-27 THY1JR - Jun 27, 05:04 UTCJun 27, 14:29 UTC9h 25m
2026-06-26 THY3DN AYT → AYT Jun 26, 17:00 UTCJun 27, 02:35 UTC9h 35m
2026-06-25 THY3DN - Jun 25, 19:34 UTCJun 26, 13:49 UTC18h 15m
2026-06-25 THY3DN - Jun 25, 17:34 UTCJun 26, 13:49 UTC20h 15m
2026-06-25 THY3DN - Jun 25, 16:55 UTCJun 26, 13:49 UTC20h 55m
2026-06-24 THY3DN - Jun 24, 17:50 UTCJun 25, 04:40 UTC10h 50m
2026-06-22 THY8CD AYT → VKO Jun 22, 16:45 UTCJun 23, 02:15 UTC9h 30m
2026-06-21 THY217 SAW → RUH Jun 21, 17:15 UTCJun 22, 03:50 UTC10h 35m
2026-06-20 THY8CD AYT → VKO Jun 20, 16:44 UTCJun 21, 02:40 UTC9h 55m
2026-06-19 THY8CD AYT → VKO Jun 19, 16:39 UTCJun 20, 02:29 UTC9h 50m
2026-06-18 THY3DN AYT → VKO Jun 18, 17:10 UTCJun 19, 04:14 UTC11h 4m
2026-06-18 THY7NK IST → STR Jun 18, 02:30 UTCJun 18, 02:40 UTC10m
2026-06-17 THY3DN AYT → VKO Jun 17, 17:00 UTCJun 17, 20:25 UTC3h 25m
2026-06-17 THY9JC - Jun 17, 09:55 UTCJun 17, 10:50 UTC55m
2026-06-16 THY5BU SJJ → IST Jun 16, 18:50 UTCJun 16, 20:05 UTC1h 16m
2026-06-16 THY4SE - Jun 16, 16:05 UTCJun 16, 17:30 UTC1h 25m
2026-06-15 THY4MJ - Jun 15, 10:09 UTCJun 15, 10:55 UTC45m

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

Mode-S 4BAA66 frequently asked

What is Mode-S code 4BAA66?
4BAA66 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JSF.
Where is Mode-S 4BAA66 registered?
Mode-S code 4BAA66 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BAA66 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BAA66, octal 22725146, decimal 4,958,822.
What flights does 4BAA66 operate?
Mode-S 4BAA66 has broadcast 20 distinct callsigns, including THY3DN, THY8CD, THY2CV, THY1VR, THY1GH.