Apparatus

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sensors Mode-S transponder

4BAB2A

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-JYJ · BOEING 737-900

Hex
4BAB2A
Octal
22725452
Decimal
4,959,018
Country
TR
Tail
TC-JYJ
Type
B739
No current signal · last broadcast Jul 26, 18:45 UTC
Flights observed
422
Distinct callsigns
20
Country
TR
Last broadcast
Jul 26, 18:45 UTC

Last known position

Most recent position reported by Mode-S 4BAB2A.

Country allocation

The ICAO 24-bit address 4BAB2A 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
THY4AV Turkish Airlines 14 2026-07-24
THY9QS - 13 2026-07-11
THY1VN - 12 2026-07-11
THY8GS Turkish Airlines 11 2026-07-24
THY267 - 8 2026-07-05
THY9VU - 6 2026-07-10
THY8CJ Turkish Airlines 6 2026-06-16
THY659 Turkish Airlines 6 2026-07-25
THY510 Turkish Airlines 6 2026-05-23
THY4YM Turkish Airlines 6 2026-06-16
THY2QT - 6 2026-06-10
THY1HM - 6 2026-07-15
THY1BS Turkish Airlines 6 2026-07-26
THY7NC Turkish Airlines 5 2026-07-26
THY55C - 5 2026-07-15
THY8RJ - 4 2026-07-17
THY7HS Turkish Airlines 4 2026-07-24
THY4PR - 4 2026-07-10
THY4AQ - 4 2026-07-17
THY2XK - 4 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 THY60E IST → BEG Jul 26, 17:45 UTCJul 26, 18:45 UTC1h 0m
2026-07-26 THY7KB NAP → ISL Jul 26, 14:45 UTCJul 26, 15:15 UTC30m
2026-07-26 THY7NC TZX → IST Jul 26, 11:05 UTCJul 26, 12:35 UTC1h 30m
2026-07-26 THY1BS IST → TZX Jul 26, 09:50 UTCJul 26, 09:55 UTC5m
2026-07-26 THY1BS IST → TZX Jul 26, 08:35 UTCJul 26, 09:05 UTC30m
2026-07-26 THY4AW ASR → IST Jul 26, 03:45 UTCJul 26, 07:00 UTC3h 16m
2026-07-25 THY659 IST → JIB Jul 25, 15:20 UTCJul 25, 17:05 UTC1h 45m
2026-07-25 THY8PN BGW → IST Jul 25, 03:55 UTCJul 25, 10:20 UTC6h 25m
2026-07-24 THY8GZ IST → EDI Jul 24, 16:20 UTCJul 24, 19:50 UTC3h 30m
2026-07-24 THY1AH OSL → IST Jul 24, 12:30 UTCJul 24, 14:35 UTC2h 5m
2026-07-24 THY7HS IST → OSL Jul 24, 09:05 UTCJul 24, 11:05 UTC2h 0m
2026-07-24 THY8GS TZX → IST Jul 24, 05:35 UTCJul 24, 07:15 UTC1h 40m
2026-07-24 THY4AV IST → TZX Jul 24, 03:10 UTCJul 24, 03:35 UTC25m
2026-07-23 THY4JC HAJ → IST Jul 23, 17:20 UTCJul 23, 19:45 UTC2h 25m
2026-07-23 THY9VA IST → HAJ Jul 23, 13:45 UTCJul 23, 16:20 UTC2h 35m
2026-07-23 THY1ND ECN → IST Jul 23, 07:35 UTCJul 23, 09:15 UTC1h 40m
2026-07-23 THY9GU IST → ALY Jul 23, 04:05 UTCJul 23, 05:50 UTC1h 45m
2026-07-22 THY2EP CLJ → IST Jul 22, 18:55 UTCJul 22, 20:10 UTC1h 15m
2026-07-22 THY98U MAD → IST Jul 22, 16:55 UTCJul 22, 17:55 UTC1h 0m
2026-07-22 THY17V - Jul 22, 13:00 UTCJul 22, 14:20 UTC1h 20m
2026-07-22 THY7LX ECN → IST Jul 22, 10:20 UTCJul 22, 11:55 UTC1h 35m
2026-07-22 THY8ES IST → TGD Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-21 THY9NX - Jul 21, 20:45 UTCJul 21, 21:20 UTC35m
2026-07-21 THY7RC - Jul 21, 17:55 UTCJul 21, 18:25 UTC30m
2026-07-21 THY1VT AMM → IST Jul 21, 13:45 UTCJul 21, 16:00 UTC2h 15m
2026-07-21 THY1LB NAP → IST Jul 21, 09:45 UTCJul 21, 12:30 UTC2h 45m
2026-07-21 THY6KC LHR → LHR Jul 21, 06:15 UTCJul 21, 06:45 UTC30m
2026-07-21 THY4BS - Jul 21, 04:20 UTCJul 21, 04:40 UTC20m
2026-07-20 THY6GT - Jul 20, 21:35 UTCJul 20, 22:15 UTC40m
2026-07-20 THY8ZN - Jul 20, 18:30 UTCJul 20, 19:00 UTC30m
2026-07-20 THY6BW - Jul 20, 15:35 UTCJul 20, 16:40 UTC1h 5m
2026-07-20 THY2PX - Jul 20, 13:20 UTCJul 20, 13:45 UTC25m
2026-07-20 THY1JE - Jul 20, 09:30 UTCJul 20, 10:05 UTC35m
2026-07-20 THY9EZ - Jul 20, 08:05 UTCJul 20, 08:15 UTC10m
2026-07-20 THY9EZ - Jul 20, 07:00 UTCJul 20, 07:30 UTC30m
2026-07-19 THY272 RMO → IST Jul 19, 16:55 UTCJul 19, 20:10 UTC3h 15m
2026-07-19 THY1AH - Jul 19, 12:25 UTCJul 19, 14:35 UTC2h 10m
2026-07-19 THY7HS IST → OSL Jul 19, 08:50 UTCJul 19, 11:05 UTC2h 15m
2026-07-19 THY4AW ASR → IST Jul 19, 03:40 UTCJul 19, 07:00 UTC3h 20m
2026-07-18 THY4UP VNO → IST Jul 18, 17:35 UTCJul 18, 20:05 UTC2h 30m
2026-07-18 THY9BS IST → VNO Jul 18, 14:00 UTCJul 18, 16:20 UTC2h 20m
2026-07-18 THY1UV - Jul 18, 05:40 UTCJul 18, 09:55 UTC4h 15m
2026-07-17 THY2XK - Jul 17, 15:25 UTCJul 17, 19:05 UTC3h 40m
2026-07-17 THY4AQ - Jul 17, 12:55 UTCJul 17, 13:15 UTC20m
2026-07-17 THY4AQ - Jul 17, 11:39 UTCJul 17, 12:10 UTC30m
2026-07-17 THY8RJ - Jul 17, 08:59 UTCJul 17, 09:25 UTC25m
2026-07-17 THY3ZP - Jul 17, 03:25 UTCJul 17, 06:50 UTC3h 25m
2026-07-16 THY1TU - Jul 16, 18:40 UTCJul 16, 20:15 UTC1h 35m
2026-07-16 THY7SP - Jul 16, 15:45 UTCJul 16, 17:20 UTC1h 35m
2026-07-16 THY4GL - Jul 16, 12:14 UTCJul 16, 13:49 UTC1h 35m

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

Mode-S 4BAB2A frequently asked

What is Mode-S code 4BAB2A?
4BAB2A is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JYJ.
Where is Mode-S 4BAB2A registered?
Mode-S code 4BAB2A is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BAB2A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BAB2A, octal 22725452, decimal 4,959,018.
What flights does 4BAB2A operate?
Mode-S 4BAB2A has broadcast 20 distinct callsigns, including THY4AV, THY9QS, THY1VN, THY8GS, THY267.