Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

452051

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-CGX · BOEING 737-400

Hex
452051
Octal
21220121
Decimal
4,530,257
Country
BG
Tail
LZ-CGX
Type
B734
No current signal · last broadcast 7h ago
Flights observed
126
Distinct callsigns
13
Country
BG
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 452051.

Country allocation

The ICAO 24-bit address 452051 falls within the block assigned to Bulgaria (BG) by ICAO Annex 10, Volume III. Every aircraft registered in Bulgaria 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 13 distinct

Callsign Airline Flights Last seen
BCS3789 European Air Transport 25 2026-05-29
BCS12P European Air Transport 25 2026-05-29
BCS8VJ European Air Transport 23 2026-05-29
BCS435 European Air Transport 18 2026-05-28
BCS4243 European Air Transport 8 2026-04-22
BCS236P - 8 2026-04-22
BCS460 European Air Transport 6 2026-04-22
BCS437 European Air Transport 6 2026-05-29
BCS80A European Air Transport 2 2026-04-17
BCS7XA European Air Transport 2 2026-04-19
BCS773P - 1 2026-05-10
BCS772P - 1 2026-05-09
BCS770P European Air Transport 1 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BCS437 CPH → EMA May 29, 21:35 UTCMay 29, 23:10 UTC1h 35m
2026-05-29 BCS3789 LEJ → TLL May 29, 18:10 UTCMay 29, 19:25 UTC1h 15m
2026-05-29 BCS12P LEJ → TLL May 29, 04:35 UTCMay 29, 06:00 UTC1h 25m
2026-05-29 BCS8VJ EMA → CPH May 29, 00:50 UTCMay 29, 02:15 UTC1h 25m
2026-05-28 BCS435 CPH → EMA May 28, 21:35 UTCMay 28, 23:15 UTC1h 40m
2026-05-28 BCS3789 LEJ → TLL May 28, 17:50 UTCMay 28, 19:05 UTC1h 15m
2026-05-28 BCS12P LEJ → TLL May 28, 04:35 UTCMay 28, 06:00 UTC1h 25m
2026-05-28 BCS8VJ EMA → CPH May 28, 00:50 UTCMay 28, 02:15 UTC1h 25m
2026-05-27 BCS435 CPH → EMA May 27, 21:35 UTCMay 27, 23:10 UTC1h 35m
2026-05-27 BCS3789 LEJ → TLL May 27, 17:55 UTCMay 27, 19:15 UTC1h 20m
2026-05-27 BCS12P LEJ → TLL May 27, 04:34 UTCMay 27, 05:49 UTC1h 15m
2026-05-27 BCS8VJ EMA → CPH May 27, 00:49 UTCMay 27, 02:09 UTC1h 20m
2026-05-26 BCS435 CPH → EMA May 26, 21:44 UTCMay 26, 23:25 UTC1h 40m
2026-05-26 BCS3789 LEJ → TLL May 26, 17:50 UTCMay 26, 19:20 UTC1h 30m
2026-05-26 BCS12P LEJ → TLL May 26, 04:20 UTCMay 26, 05:34 UTC1h 15m
2026-05-24 BCS8VJ EMA → CPH May 24, 21:05 UTCMay 24, 21:45 UTC40m
2026-05-22 BCS437 CPH → EMA May 22, 21:35 UTCMay 22, 23:10 UTC1h 35m
2026-05-22 BCS3789 LEJ → TLL May 22, 17:50 UTCMay 22, 19:10 UTC1h 20m
2026-05-22 BCS12P LEJ → TLL May 22, 04:45 UTCMay 22, 06:05 UTC1h 20m
2026-05-22 BCS8VJ EMA → CPH May 22, 00:50 UTCMay 22, 02:10 UTC1h 20m
2026-05-21 BCS435 CPH → EMA May 21, 21:40 UTCMay 21, 23:15 UTC1h 35m
2026-05-21 BCS3789 LEJ → TLL May 21, 17:40 UTCMay 21, 19:00 UTC1h 20m
2026-05-21 BCS12P LEJ → TLL May 21, 05:00 UTCMay 21, 06:10 UTC1h 10m
2026-05-21 BCS8VJ EMA → CPH May 21, 00:50 UTCMay 21, 02:15 UTC1h 25m
2026-05-20 BCS435 CPH → EMA May 20, 21:45 UTCMay 20, 23:25 UTC1h 40m
2026-05-20 BCS3789 LEJ → TLL May 20, 17:55 UTCMay 20, 19:15 UTC1h 20m
2026-05-20 BCS12P LEJ → TLL May 20, 04:35 UTCMay 20, 05:50 UTC1h 16m
2026-05-20 BCS8VJ EMA → CPH May 20, 00:50 UTCMay 20, 02:20 UTC1h 30m
2026-05-19 BCS435 CPH → EMA May 19, 21:40 UTCMay 19, 23:15 UTC1h 35m
2026-05-19 BCS3789 LEJ → TLL May 19, 17:40 UTCMay 19, 18:55 UTC1h 15m
2026-05-19 BCS12P LEJ → TLL May 19, 04:35 UTCMay 19, 05:50 UTC1h 15m
2026-05-19 BCS8VJ EMA → CPH May 19, 00:45 UTCMay 19, 02:15 UTC1h 30m
2026-05-18 BCS435 CPH → EMA May 18, 21:45 UTCMay 18, 23:25 UTC1h 40m
2026-05-18 BCS3789 LEJ → TLL May 18, 17:55 UTCMay 18, 19:20 UTC1h 24m
2026-05-18 BCS12P LEJ → TLL May 18, 01:50 UTCMay 18, 03:05 UTC1h 15m
2026-05-17 BCS8VJ EMA → CPH May 17, 21:10 UTCMay 17, 22:40 UTC1h 30m
2026-05-15 BCS437 CPH → EMA May 15, 21:35 UTCMay 15, 23:10 UTC1h 35m
2026-05-15 BCS3789 LEJ → TLL May 15, 17:50 UTCMay 15, 19:05 UTC1h 15m
2026-05-15 BCS12P LEJ → TLL May 15, 04:30 UTCMay 15, 05:45 UTC1h 15m
2026-05-15 BCS8VJ EMA → CPH May 15, 00:45 UTCMay 15, 02:15 UTC1h 30m
2026-05-14 BCS3789 LEJ → TLL May 14, 21:35 UTCMay 14, 23:00 UTC1h 25m
2026-05-14 BCS3789 LEJ → TLL May 14, 17:50 UTCMay 14, 19:45 UTC1h 55m
2026-05-14 BCS12P LEJ → TLL May 14, 04:25 UTCMay 14, 06:05 UTC1h 40m
2026-05-14 BCS12P LEJ → TLL May 14, 00:45 UTCMay 14, 02:10 UTC1h 25m
2026-05-13 BCS435 CPH → EMA May 13, 21:55 UTCMay 13, 23:25 UTC1h 30m
2026-05-13 BCS3789 LEJ → TLL May 13, 17:55 UTCMay 13, 19:10 UTC1h 15m
2026-05-13 BCS12P LEJ → TLL May 13, 04:40 UTCMay 13, 05:55 UTC1h 15m
2026-05-13 BCS8VJ EMA → CPH May 13, 01:35 UTCMay 13, 03:00 UTC1h 25m
2026-05-12 BCS435 CPH → EMA May 12, 21:35 UTCMay 12, 23:15 UTC1h 40m
2026-05-12 BCS3789 LEJ → TLL May 12, 17:40 UTCMay 12, 19:00 UTC1h 20m

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 LZ-CGX page for operator, model, and routing details .

Mode-S 452051 frequently asked

What is Mode-S code 452051?
452051 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-CGX.
Where is Mode-S 452051 registered?
Mode-S code 452051 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 452051 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 452051, octal 21220121, decimal 4,530,257.
What flights does 452051 operate?
Mode-S 452051 has broadcast 13 distinct callsigns, including BCS3789, BCS12P, BCS8VJ, BCS435, BCS4243.