Apparatus

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sensors Mode-S transponder

4BB187

ICAO 24-bit transponder address · allocated to Turkey

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

Hex
4BB187
Octal
22730607
Decimal
4,960,647
Country
TR
Tail
TC-LLG
Type
B789
Broadcasting now · callsign THY5KM · 37,975 ft
Flights observed
14
Distinct callsigns
2
Country
TR
Last broadcast
16h ago

Current position

4BB187 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4BB187 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 2 distinct

Callsign Airline Flights Last seen
THY181 Turkish Airlines 13 2026-04-14
THY6TR - 1 2026-04-12

Recent flights last 14

DateFlightRouteTakeoffLandingDuration
2026-04-14 THY181 CUN → IST Apr 14, 05:15 UTCApr 14, 06:50 UTC1h 35m
2026-04-13 THY181 CUN → IST Apr 13, 19:50 UTCApr 13, 20:45 UTC55m
2026-04-13 THY181 CUN → IST Apr 13, 19:35 UTCApr 13, 20:10 UTC35m
2026-04-13 THY181 CUN → IST Apr 13, 17:15 UTCApr 13, 17:20 UTC5m
2026-04-13 THY181 CUN → IST Apr 13, 15:50 UTCApr 13, 16:20 UTC30m
2026-04-13 THY181 CUN → IST Apr 13, 15:35 UTCApr 13, 16:15 UTC40m
2026-04-13 THY181 CUN → IST Apr 13, 12:55 UTCApr 13, 13:40 UTC45m
2026-04-13 THY181 CUN → IST Apr 13, 08:20 UTCApr 13, 11:45 UTC3h 25m
2026-04-13 THY181 CUN → IST Apr 13, 07:55 UTCApr 13, 11:45 UTC3h 50m
2026-04-13 THY181 CUN → IST Apr 13, 04:20 UTCApr 13, 08:15 UTC3h 55m
2026-04-13 THY181 CUN → IST Apr 13, 03:55 UTCApr 13, 07:50 UTC3h 55m
2026-04-13 THY181 CUN → IST Apr 13, 00:20 UTCApr 13, 04:15 UTC3h 55m
2026-04-12 THY181 CUN → IST Apr 12, 23:55 UTCApr 13, 02:35 UTC2h 40m
2026-04-12 THY6TR - Apr 12, 17:55 UTCApr 12, 19:20 UTC1h 25m

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

Mode-S 4BB187 frequently asked

What is Mode-S code 4BB187?
4BB187 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-LLG.
Where is Mode-S 4BB187 registered?
Mode-S code 4BB187 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BB187 broadcasting right now?
Yes. Mode-S 4BB187 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BB187, octal 22730607, decimal 4,960,647.
What flights does 4BB187 operate?
Mode-S 4BB187 has broadcast 2 distinct callsigns, including THY181, THY6TR.