sensors Mode-S transponder

4BCE19

ICAO 24-bit transponder address · allocated to Turkey

Currently assigned to TC-SPY · BOEING 737-800

Hex
4BCE19
Octal
22747031
Decimal
4,967,961
Country
TR
Tail
TC-SPY
Type
B738
No current signal · last broadcast 1d ago
Flights observed
5
Distinct callsigns
3
Country
TR
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 4BCE19.

Country allocation

The ICAO 24-bit address 4BCE19 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
SXS7EC SunExpress 2 2026-04-13
SXS4VD - 2 2026-04-13
SXS1EN - 1 2026-04-12

Recent flights last 5

DateFlightRouteTakeoffLandingDuration
2026-04-13 SXS7EC AYT → HAJ Apr 13, 19:50 UTCApr 13, 22:20 UTC2h 30m
2026-04-13 SXS7EC AYT → HAJ Apr 13, 19:05 UTCApr 13, 20:10 UTC1h 5m
2026-04-13 SXS4VD - Apr 13, 00:20 UTCApr 13, 02:35 UTC2h 15m
2026-04-12 SXS4VD - Apr 12, 23:55 UTCApr 13, 02:35 UTC2h 40m
2026-04-12 SXS1EN - Apr 12, 18:35 UTCApr 12, 20:15 UTC1h 40m

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

Mode-S 4BCE19 frequently asked

What is Mode-S code 4BCE19?
4BCE19 is an ICAO 24-bit transponder address. Allocated to Turkey. Assigned to TC-SPY.
Where is Mode-S 4BCE19 registered?
Mode-S code 4BCE19 is allocated to Turkey (TR). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4BCE19 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4BCE19, octal 22747031, decimal 4,967,961.
What flights does 4BCE19 operate?
Mode-S 4BCE19 has broadcast 3 distinct callsigns, including SXS7EC, SXS4VD, SXS1EN.