sensors Mode-S transponder

4BB1A3

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-LMC · BOEING 787-9 Dreamliner

Hex
4BB1A3
Octal
22730643
Decimal
4,960,675
Country
TR
Tail
TC-LMC
Type
B789
Broadcasting now · callsign THY171 · 33,975 ft
Flights observed
8
Distinct callsigns
3
Country
TR
Last broadcast
21h ago

Current position

4BB1A3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4BB1A3 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 3 distinct

Callsign Airline Flights Last seen
THY32G - 4 2026-04-13
THY197 Turkish Airlines 2 2026-04-14
THY196 Turkish Airlines 2 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 THY197 PEK → IST Apr 14, 09:10 UTCApr 14, 09:40 UTC30m
2026-04-14 THY197 PEK → IST Apr 14, 08:25 UTCApr 14, 09:05 UTC40m
2026-04-13 THY196 IST → PEK Apr 13, 16:15 UTCApr 13, 16:35 UTC20m
2026-04-13 THY196 IST → PEK Apr 13, 15:50 UTCApr 13, 16:15 UTC25m
2026-04-13 THY32G - Apr 13, 11:55 UTCApr 13, 12:25 UTC30m
2026-04-13 THY32G - Apr 13, 08:50 UTCApr 13, 12:15 UTC3h 25m
2026-04-13 THY32G - Apr 13, 03:55 UTCApr 13, 04:25 UTC30m
2026-04-13 THY32G - Apr 13, 02:10 UTCApr 13, 04:15 UTC2h 5m

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

Mode-S 4BB1A3 frequently asked

What is Mode-S code 4BB1A3?
4BB1A3 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-LMC.
Where is Mode-S 4BB1A3 registered?
Mode-S code 4BB1A3 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BB1A3 broadcasting right now?
Yes. Mode-S 4BB1A3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BB1A3, octal 22730643, decimal 4,960,675.
What flights does 4BB1A3 operate?
Mode-S 4BB1A3 has broadcast 3 distinct callsigns, including THY32G, THY197, THY196.