Apparatus

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sensors Mode-S transponder

4BB18A

ICAO 24-bit transponder address · allocated to Turkey

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

Hex
4BB18A
Octal
22730612
Decimal
4,960,650
Country
TR
Tail
TC-LLJ
Type
B789
Broadcasting now · callsign THY12E · 36,975 ft
Flights observed
8
Distinct callsigns
3
Country
TR
Last broadcast
22h ago

Current position

4BB18A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4BB18A 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
THY310 Turkish Airlines 4 2026-04-13
THY8MT Turkish Airlines 2 2026-04-14
THY311 Turkish Airlines 2 2026-04-13

Recent flights last 8

DateFlightRouteTakeoffLandingDuration
2026-04-14 THY8MT IST → LAX Apr 14, 07:10 UTCApr 14, 09:00 UTC1h 50m
2026-04-14 THY8MT IST → LAX Apr 14, 05:55 UTCApr 14, 07:10 UTC1h 15m
2026-04-13 THY311 DPS → IST Apr 13, 19:50 UTCApr 13, 21:45 UTC1h 55m
2026-04-13 THY311 DPS → IST Apr 13, 16:15 UTCApr 13, 20:10 UTC3h 55m
2026-04-13 THY310 IST → DPS Apr 13, 08:40 UTCApr 13, 09:05 UTC25m
2026-04-13 THY310 IST → DPS Apr 13, 04:20 UTCApr 13, 07:35 UTC3h 15m
2026-04-13 THY310 IST → DPS Apr 13, 03:55 UTCApr 13, 07:35 UTC3h 40m
2026-04-13 THY310 IST → DPS Apr 13, 00:20 UTCApr 13, 04:15 UTC3h 55m

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

Mode-S 4BB18A frequently asked

What is Mode-S code 4BB18A?
4BB18A is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-LLJ.
Where is Mode-S 4BB18A registered?
Mode-S code 4BB18A is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BB18A broadcasting right now?
Yes. Mode-S 4BB18A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BB18A, octal 22730612, decimal 4,960,650.
What flights does 4BB18A operate?
Mode-S 4BB18A has broadcast 3 distinct callsigns, including THY310, THY8MT, THY311.