Apparatus

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sensors Mode-S transponder

4BAA61

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-JSA · AIRBUS A-321

Hex
4BAA61
Octal
22725141
Decimal
4,958,817
Country
TR
Tail
TC-JSA
Type
A321
No current signal · last broadcast 6h ago
Flights observed
116
Distinct callsigns
20
Country
TR
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4BAA61.

Country allocation

The ICAO 24-bit address 4BAA61 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 Turkish Airlines 12 2026-05-27
THY217 Turkish Airlines 5 2026-05-19
THY8CD Turkish Airlines 3 2026-05-20
THY1JR Turkish Airlines 3 2026-05-24
THY1DY Turkish Airlines 3 2026-04-14
THY9VA - 2 2026-04-17
THY9NS Turkish Airlines 2 2026-04-27
THY91B Turkish Airlines 2 2026-04-26
THY8YU Turkish Airlines 2 2026-04-17
THY8HA Turkish Airlines 2 2026-04-14
THY7NK Turkish Airlines 2 2026-05-28
THY7LR Turkish Airlines 2 2026-04-28
THY6EU Turkish Airlines 2 2026-04-15
THY6DR - 2 2026-04-14
THY6CV - 2 2026-04-16
THY5YN Turkish Airlines 2 2026-04-16
THY5VC Turkish Airlines 2 2026-04-18
THY4ZX Turkish Airlines 2 2026-04-14
THY4JC - 2 2026-04-17
THY4907 Turkish Airlines 2 2026-05-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 THY9UG BAL → IST May 29, 14:35 UTCMay 29, 19:10 UTC4h 35m
2026-05-29 THY2KF CLJ → IST May 29, 08:40 UTCMay 29, 12:55 UTC4h 15m
2026-05-29 THY7MV AYT → IST May 29, 05:45 UTCMay 29, 06:40 UTC55m
2026-05-29 THY2TF IST → AYT May 29, 03:25 UTCMay 29, 04:20 UTC55m
2026-05-28 THY9VU IST → VAR May 28, 19:15 UTCMay 28, 20:30 UTC1h 15m
2026-05-28 THY4PR AYT → IST May 28, 16:30 UTCMay 28, 17:50 UTC1h 20m
2026-05-28 THY1QU IST → BHX May 28, 11:10 UTCMay 28, 12:10 UTC1h 0m
2026-05-28 THY7NK IST → STR May 28, 00:30 UTCMay 28, 02:45 UTC2h 15m
2026-05-27 THY3DN AYT → VKO May 27, 20:50 UTCMay 27, 21:00 UTC10m
2026-05-27 THY3DN AYT → VKO May 27, 17:05 UTCMay 27, 20:15 UTC3h 10m
2026-05-26 THY3ET LED → AYT May 26, 23:05 UTCMay 27, 02:59 UTC3h 55m
2026-05-26 THY8LY BAH → IST May 26, 17:30 UTCMay 26, 20:05 UTC2h 35m
2026-05-25 THY5KC IST → ALG May 25, 16:45 UTCMay 26, 02:39 UTC9h 55m
2026-05-24 THY3DN AYT → VKO May 24, 17:45 UTCMay 25, 03:30 UTC9h 45m
2026-05-24 THY1JR IST → STR May 24, 05:00 UTCMay 24, 08:20 UTC3h 20m
2026-05-23 THY3DN AYT → VKO May 23, 17:00 UTCMay 23, 20:25 UTC3h 26m
2026-05-23 THY7NK IST → STR May 23, 05:15 UTCMay 23, 06:45 UTC1h 30m
2026-05-23 THY3DN AYT → VKO May 23, 00:25 UTCMay 23, 00:50 UTC25m
2026-05-22 THY3DN AYT → VKO May 22, 22:10 UTCMay 22, 22:35 UTC25m
2026-05-22 THY3DN AYT → VKO May 22, 17:10 UTCMay 22, 20:30 UTC3h 20m
2026-05-21 THY3DN AYT → VKO May 21, 17:05 UTCMay 22, 05:10 UTC12h 5m
2026-05-20 THY8CD AYT → VKO May 20, 16:50 UTCMay 21, 02:45 UTC9h 55m
2026-05-19 THY217 SAW → RUH May 19, 17:15 UTCMay 20, 03:15 UTC10h 0m
2026-05-19 THY4UA IST → DUB May 19, 15:00 UTCMay 19, 15:50 UTC50m
2026-05-18 THY1HC IST → VKO May 18, 17:55 UTCMay 19, 02:35 UTC8h 39m
2026-05-18 THY5YA - May 18, 04:40 UTCMay 18, 04:51 UTC10m
2026-05-17 THY27M - May 17, 16:05 UTCMay 17, 16:40 UTC35m
2026-05-17 THY34Q AYT → ECN May 17, 14:15 UTCMay 17, 14:50 UTC35m
2026-05-16 THY4TJ MSR → IST May 16, 18:05 UTCMay 17, 04:00 UTC9h 55m
2026-05-15 THY3DN AYT → VKO May 15, 17:05 UTCMay 16, 04:35 UTC11h 30m
2026-05-14 THY3DN AYT → VKO May 14, 16:55 UTCMay 15, 03:35 UTC10h 40m
2026-05-13 THY1JR IST → STR May 13, 08:10 UTCMay 13, 18:15 UTC10h 5m
2026-05-12 THY8CD AYT → VKO May 12, 17:40 UTCMay 12, 20:20 UTC2h 40m
2026-05-12 THY8CD AYT → VKO May 12, 16:50 UTCMay 12, 17:00 UTC10m
2026-05-11 THY217 SAW → RUH May 11, 17:35 UTCMay 12, 03:15 UTC9h 40m
2026-05-11 THY1JR IST → STR May 11, 05:05 UTCMay 11, 14:35 UTC9h 30m
2026-05-10 THY3DN AYT → VKO May 10, 17:10 UTCMay 11, 03:00 UTC9h 50m
2026-05-09 THY217 SAW → RUH May 9, 17:30 UTCMay 9, 21:34 UTC4h 5m
2026-05-08 THY217 SAW → RUH May 8, 20:00 UTCMay 9, 06:20 UTC10h 20m
2026-05-08 THY6919 JFK → IST May 8, 15:50 UTCMay 8, 18:35 UTC2h 45m
2026-05-06 THY217 SAW → RUH May 6, 17:05 UTCMay 6, 20:50 UTC3h 44m
2026-05-05 THY3DN AYT → VKO May 5, 17:10 UTCMay 6, 03:40 UTC10h 30m
2026-05-04 THY27M - May 4, 11:10 UTCMay 4, 11:50 UTC40m
2026-05-04 THY34Q AYT → ECN May 4, 09:10 UTCMay 4, 09:45 UTC35m
2026-05-03 THY7CE LED → AYT May 3, 17:20 UTCMay 4, 02:25 UTC9h 5m
2026-05-03 THY6958 - May 3, 14:05 UTCMay 3, 14:45 UTC40m
2026-05-03 THY2SE IST → ISE May 3, 09:10 UTCMay 3, 12:00 UTC2h 50m
2026-05-03 THY4CK IST → ARN May 3, 04:55 UTCMay 3, 07:45 UTC2h 50m
2026-05-02 THY5WX IST → GNY May 2, 06:10 UTCMay 2, 06:35 UTC25m
2026-05-02 THY2HR IST → STR May 2, 04:20 UTCMay 2, 04:55 UTC35m

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

Mode-S 4BAA61 frequently asked

What is Mode-S code 4BAA61?
4BAA61 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JSA.
Where is Mode-S 4BAA61 registered?
Mode-S code 4BAA61 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BAA61 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BAA61, octal 22725141, decimal 4,958,817.
What flights does 4BAA61 operate?
Mode-S 4BAA61 has broadcast 20 distinct callsigns, including THY3DN, THY217, THY8CD, THY1JR, THY1DY.