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sensors Mode-S transponder

4BAB27

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-JYG · BOEING 737-900

Hex
4BAB27
Octal
22725447
Decimal
4,959,015
Country
TR
Tail
TC-JYG
Type
B739
No current signal · last broadcast Jul 26, 19:55 UTC
Flights observed
462
Distinct callsigns
20
Country
TR
Last broadcast
Jul 26, 19:55 UTC

Last known position

Most recent position reported by Mode-S 4BAB27.

Country allocation

The ICAO 24-bit address 4BAB27 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
THY8GS Turkish Airlines 19 2026-07-21
THY4AV Turkish Airlines 18 2026-07-21
THY1VN - 13 2026-07-20
THY9QS - 8 2026-07-20
THY2LJ - 7 2026-07-15
THY6QV - 6 2026-07-15
THY6HM Turkish Airlines 6 2026-07-13
THY2QT - 6 2026-05-27
THY8RJ - 5 2026-07-19
THY7NC - 5 2026-07-14
THY659 - 5 2026-07-14
THY512 Turkish Airlines 5 2026-05-27
THY4AQ - 5 2026-07-19
THY1BS - 5 2026-07-14
THY9MV - 4 2026-07-03
THY8CJ - 4 2026-07-16
THY6NP - 4 2026-07-03
THY5SN Turkish Airlines 4 2026-07-13
THY4YM - 4 2026-07-16
THY1TU Turkish Airlines 4 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 THY1MF ERZ → IST Jul 26, 16:55 UTCJul 26, 19:55 UTC3h 0m
2026-07-26 THY5LF - Jul 26, 10:40 UTCJul 26, 14:55 UTC4h 15m
2026-07-26 THY1246 STN → IST Jul 26, 06:00 UTCJul 26, 08:05 UTC2h 6m
2026-07-25 THY20F IST → STN Jul 25, 17:35 UTCJul 25, 20:55 UTC3h 20m
2026-07-25 THY4GL TZX → IST Jul 25, 12:20 UTCJul 25, 14:05 UTC1h 45m
2026-07-25 THY9GY IST → DUS Jul 25, 09:30 UTCJul 25, 11:10 UTC1h 40m
2026-07-25 THY76W SZF → IST Jul 25, 03:55 UTCJul 25, 07:10 UTC3h 15m
2026-07-24 THY6EZ DUS → IST Jul 24, 18:35 UTCJul 24, 21:10 UTC2h 35m
2026-07-24 THY5KP IST → MUC Jul 24, 14:20 UTCJul 24, 17:05 UTC2h 45m
2026-07-24 THY1WR - Jul 24, 06:00 UTCJul 24, 09:30 UTC3h 30m
2026-07-24 THY6RD ADA → IST Jul 24, 02:05 UTCJul 24, 03:20 UTC1h 15m
2026-07-23 THY4YQ AYT → ECN Jul 23, 22:25 UTCJul 23, 23:35 UTC1h 10m
2026-07-23 THY3BE BRI → IST Jul 23, 18:40 UTCJul 23, 20:05 UTC1h 25m
2026-07-23 THY3XD - Jul 23, 16:00 UTCJul 23, 17:40 UTC1h 40m
2026-07-23 THY3AN SOF → IST Jul 23, 13:05 UTCJul 23, 13:55 UTC50m
2026-07-23 THY9UH SOF → IST Jul 23, 11:05 UTCJul 23, 11:55 UTC50m
2026-07-23 THY5UR IST → DIY Jul 23, 03:15 UTCJul 23, 07:40 UTC4h 25m
2026-07-22 THY7YC - Jul 22, 19:05 UTCJul 22, 19:30 UTC25m
2026-07-22 THY7YC - Jul 22, 17:55 UTCJul 22, 18:25 UTC30m
2026-07-22 THY9SM - Jul 22, 16:30 UTCJul 22, 16:45 UTC15m
2026-07-22 THY9SM - Jul 22, 15:30 UTCJul 22, 15:55 UTC25m
2026-07-22 THY1CB - Jul 22, 12:30 UTCJul 22, 13:15 UTC45m
2026-07-22 THY2522 IST → BJV Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 THY7NU MLX → IST Jul 22, 04:55 UTCJul 22, 05:25 UTC30m
2026-07-21 THY1TU IST → GZT Jul 21, 19:30 UTCJul 21, 21:05 UTC1h 35m
2026-07-21 THY7SP IST → BJV Jul 21, 16:30 UTCJul 21, 18:10 UTC1h 40m
2026-07-21 THY7EM GZT → IST Jul 21, 09:55 UTCJul 21, 13:30 UTC3h 35m
2026-07-21 THY8GS TZX → IST Jul 21, 06:45 UTCJul 21, 07:05 UTC20m
2026-07-21 THY8GS TZX → IST Jul 21, 05:35 UTCJul 21, 06:10 UTC35m
2026-07-21 THY4AV IST → TZX Jul 21, 03:15 UTCJul 21, 03:40 UTC25m
2026-07-20 THY8NG IST → LGW Jul 20, 20:05 UTCJul 20, 21:00 UTC55m
2026-07-20 THY4UM - Jul 20, 18:00 UTCJul 20, 18:45 UTC45m
2026-07-20 THY3SF - Jul 20, 10:20 UTCJul 20, 13:30 UTC3h 10m
2026-07-20 THY1VN - Jul 20, 07:10 UTCJul 20, 07:35 UTC25m
2026-07-20 THY1VN - Jul 20, 05:50 UTCJul 20, 06:30 UTC40m
2026-07-20 THY9QS - Jul 20, 03:25 UTCJul 20, 03:50 UTC25m
2026-07-19 THY3NS IST → GZT Jul 19, 15:20 UTCJul 19, 16:15 UTC55m
2026-07-19 THY4AQ - Jul 19, 12:50 UTCJul 19, 13:20 UTC30m
2026-07-19 THY4AQ - Jul 19, 11:40 UTCJul 19, 12:20 UTC40m
2026-07-19 THY8RJ - Jul 19, 10:20 UTCJul 19, 10:45 UTC25m
2026-07-19 THY8RJ - Jul 19, 09:15 UTCJul 19, 09:45 UTC30m
2026-07-19 THY8GS - Jul 19, 05:40 UTCJul 19, 06:15 UTC35m
2026-07-19 THY4AV IST → TZX Jul 19, 03:30 UTCJul 19, 03:50 UTC20m
2026-07-18 THY272 RMO → IST Jul 18, 19:20 UTCJul 18, 20:05 UTC45m
2026-07-18 THY271 - Jul 18, 16:50 UTCJul 18, 17:30 UTC40m
2026-07-18 THY8UZ - Jul 18, 10:10 UTCJul 18, 14:05 UTC3h 55m
2026-07-18 THY8FB - Jul 18, 07:00 UTCJul 18, 08:10 UTC1h 10m
2026-07-18 THY7NU MLX → IST Jul 18, 04:40 UTCJul 18, 05:45 UTC1h 5m
2026-07-17 THY1140 - Jul 17, 17:35 UTCJul 17, 19:49 UTC2h 15m
2026-07-17 THY1139 - Jul 17, 13:15 UTCJul 17, 15:25 UTC2h 10m

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

Mode-S 4BAB27 frequently asked

What is Mode-S code 4BAB27?
4BAB27 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JYG.
Where is Mode-S 4BAB27 registered?
Mode-S code 4BAB27 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BAB27 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BAB27, octal 22725447, decimal 4,959,015.
What flights does 4BAB27 operate?
Mode-S 4BAB27 has broadcast 20 distinct callsigns, including THY8GS, THY4AV, THY1VN, THY9QS, THY2LJ.