sensors Mode-S transponder

4BAB2D

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-JYM · BOEING 737-900

Hex
4BAB2D
Octal
22725455
Decimal
4,959,021
Country
TR
Tail
TC-JYM
Type
B739
No current signal · last broadcast 14h ago
Flights observed
10
Distinct callsigns
6
Country
TR
Last broadcast
14h ago

Last known position

Most recent position reported by Mode-S 4BAB2D.

Country allocation

The ICAO 24-bit address 4BAB2D 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 6 distinct

Callsign Airline Flights Last seen
THY3BJ - 3 2026-04-13
THY1GS Turkish Airlines 2 2026-04-13
THY1748 - 2 2026-04-14
THY9TJ - 1 2026-04-13
THY7QZ - 1 2026-04-13
THY4ND Turkish Airlines 1 2026-04-13

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 THY1748 - Apr 14, 07:10 UTCApr 14, 08:20 UTC1h 10m
2026-04-14 THY1748 - Apr 14, 05:20 UTCApr 14, 07:10 UTC1h 50m
2026-04-13 THY1GS DTW → IST Apr 13, 19:50 UTCApr 13, 21:15 UTC1h 25m
2026-04-13 THY1GS DTW → IST Apr 13, 18:00 UTCApr 13, 20:10 UTC2h 10m
2026-04-13 THY7QZ - Apr 13, 13:55 UTCApr 13, 14:55 UTC1h 0m
2026-04-13 THY3BJ - Apr 13, 12:20 UTCApr 13, 12:25 UTC5m
2026-04-13 THY3BJ - Apr 13, 11:55 UTCApr 13, 12:25 UTC30m
2026-04-13 THY3BJ - Apr 13, 10:40 UTCApr 13, 12:15 UTC1h 35m
2026-04-13 THY9TJ - Apr 13, 06:45 UTCApr 13, 07:20 UTC35m
2026-04-13 THY4ND VCE → ISL Apr 13, 04:50 UTCApr 13, 05:35 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-JYM page for operator, model, and routing details .

Mode-S 4BAB2D frequently asked

What is Mode-S code 4BAB2D?
4BAB2D is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-JYM.
Where is Mode-S 4BAB2D registered?
Mode-S code 4BAB2D is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BAB2D broadcasting right now?
No active broadcast right now. Last signal was 14h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BAB2D, octal 22725455, decimal 4,959,021.
What flights does 4BAB2D operate?
Mode-S 4BAB2D has broadcast 6 distinct callsigns, including THY3BJ, THY1GS, THY1748, THY9TJ, THY7QZ.