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 Jul 25, 15:30 UTC
Flights observed
241
Distinct callsigns
20
Country
BG
Last broadcast
Jul 25, 15:30 UTC

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 20 distinct

Callsign Airline Flights Last seen
BCS8VJ - 48 2026-07-03
BCS3789 European Air Transport 48 2026-07-03
BCS12P - 48 2026-07-03
BCS435 - 38 2026-07-02
BCS437 - 11 2026-07-03
BCS4243 European Air Transport 8 2026-04-22
BCS236P - 8 2026-04-22
BCS460 European Air Transport 6 2026-04-22
BCS80A European Air Transport 2 2026-04-17
BCS7XA European Air Transport 2 2026-04-19
BCS9009 European Air Transport 1 2026-07-25
BCS9008 - 1 2026-07-25
BCS856 European Air Transport 1 2026-07-18
BCS854 - 1 2026-07-17
BCS851P - 1 2026-07-10
BCS850 - 1 2026-07-10
BCS844 European Air Transport 1 2026-07-16
BCS841 European Air Transport 1 2026-07-23
BCS840 European Air Transport 1 2026-07-23
BCS7AG - 1 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 BCS9009 SOF → SOF Jul 25, 13:35 UTCJul 25, 15:25 UTC1h 50m
2026-07-25 BCS9008 LEJ → SOF Jul 25, 03:55 UTCJul 25, 05:35 UTC1h 40m
2026-07-24 BCS5917 KTW → LEJ Jul 24, 20:00 UTCJul 24, 20:50 UTC50m
2026-07-24 BCS5916 LEJ → KTW Jul 24, 03:35 UTCJul 24, 04:30 UTC55m
2026-07-23 BCS841 LEJ → MAD Jul 23, 03:50 UTCJul 23, 05:00 UTC1h 10m
2026-07-23 BCS840 LEJ → MXP Jul 23, 00:45 UTCJul 23, 01:45 UTC1h 0m
2026-07-18 BCS856 LEJ → CDG Jul 18, 02:14 UTCJul 18, 03:20 UTC1h 6m
2026-07-17 BCS7AG - Jul 17, 23:25 UTCJul 18, 01:00 UTC1h 35m
2026-07-17 BCS22W EMA → ALC Jul 17, 18:40 UTCJul 17, 19:30 UTC50m
2026-07-17 BCS854 - Jul 17, 06:10 UTCJul 17, 06:54 UTC45m
2026-07-17 BCS3CA - Jul 17, 01:45 UTCJul 17, 03:25 UTC1h 40m
2026-07-16 BCS844 LEJ → MXP Jul 16, 22:55 UTCJul 17, 00:30 UTC1h 35m
2026-07-16 BCS51M - Jul 16, 18:10 UTCJul 16, 19:40 UTC1h 30m
2026-07-16 BCS3906 - Jul 16, 03:50 UTCJul 16, 05:05 UTC1h 15m
2026-07-10 BCS851P - Jul 10, 03:15 UTCJul 10, 04:20 UTC1h 5m
2026-07-10 BCS850 - Jul 10, 01:05 UTCJul 10, 02:05 UTC1h 0m
2026-07-06 BCS2135 EDI → LEJ Jul 6, 19:40 UTCJul 6, 21:20 UTC1h 40m
2026-07-06 BCS2134 LEJ → EDI Jul 6, 02:45 UTCJul 6, 04:45 UTC2h 0m
2026-07-05 BCS105 EMA → LEJ Jul 5, 20:50 UTCJul 5, 22:10 UTC1h 20m
2026-07-03 BCS437 - Jul 3, 21:35 UTCJul 3, 23:20 UTC1h 45m
2026-07-03 BCS3789 LEJ → TLL Jul 3, 18:05 UTCJul 3, 19:20 UTC1h 15m
2026-07-03 BCS12P - Jul 3, 04:25 UTCJul 3, 05:35 UTC1h 10m
2026-07-03 BCS8VJ EMA → CPH Jul 3, 00:50 UTCJul 3, 02:15 UTC1h 25m
2026-07-02 BCS435 - Jul 2, 22:05 UTCJul 2, 23:45 UTC1h 40m
2026-07-02 BCS3789 LEJ → TLL Jul 2, 17:55 UTCJul 2, 19:20 UTC1h 25m
2026-07-02 BCS12P - Jul 2, 04:35 UTCJul 2, 05:45 UTC1h 10m
2026-07-02 BCS8VJ EMA → CPH Jul 2, 00:55 UTCJul 2, 02:10 UTC1h 15m
2026-07-01 BCS435 - Jul 1, 21:45 UTCJul 1, 23:25 UTC1h 40m
2026-07-01 BCS3789 LEJ → TLL Jul 1, 17:55 UTCJul 1, 19:25 UTC1h 30m
2026-07-01 BCS12P CPH → TLL Jul 1, 04:35 UTCJul 1, 05:35 UTC1h 0m
2026-07-01 BCS8VJ EMA → CPH Jul 1, 00:50 UTCJul 1, 02:10 UTC1h 20m
2026-06-30 BCS435 - Jun 30, 21:45 UTCJun 30, 23:20 UTC1h 35m
2026-06-30 BCS3789 LEJ → TLL Jun 30, 18:00 UTCJun 30, 19:25 UTC1h 25m
2026-06-30 BCS12P CPH → TLL Jun 30, 04:35 UTCJun 30, 05:45 UTC1h 10m
2026-06-30 BCS8VJ EMA → CPH Jun 30, 00:49 UTCJun 30, 02:10 UTC1h 20m
2026-06-29 BCS435 CPH → EMA Jun 29, 21:44 UTCJun 29, 23:29 UTC1h 45m
2026-06-29 BCS3789 LEJ → TLL Jun 29, 17:55 UTCJun 29, 19:24 UTC1h 30m
2026-06-29 BCS12P - Jun 29, 01:50 UTCJun 29, 03:05 UTC1h 15m
2026-06-28 BCS8VJ EMA → CPH Jun 28, 21:14 UTCJun 28, 22:39 UTC1h 25m
2026-06-26 BCS437 CPH → EMA Jun 26, 21:50 UTCJun 26, 23:25 UTC1h 35m
2026-06-26 BCS3789 LEJ → TLL Jun 26, 17:50 UTCJun 26, 19:04 UTC1h 15m
2026-06-26 BCS12P CPH → TLL Jun 26, 04:34 UTCJun 26, 05:44 UTC1h 10m
2026-06-26 BCS8VJ EMA → CPH Jun 26, 00:55 UTCJun 26, 02:20 UTC1h 25m
2026-06-25 BCS435 CPH → EMA Jun 25, 21:50 UTCJun 25, 23:19 UTC1h 30m
2026-06-25 BCS3789 LEJ → TLL Jun 25, 17:49 UTCJun 25, 19:09 UTC1h 20m
2026-06-25 BCS12P - Jun 25, 04:35 UTCJun 25, 05:50 UTC1h 15m
2026-06-25 BCS8VJ EMA → CPH Jun 25, 00:55 UTCJun 25, 02:14 UTC1h 20m
2026-06-24 BCS435 CPH → EMA Jun 24, 21:34 UTCJun 24, 23:10 UTC1h 35m
2026-06-24 BCS8VJ EMA → CPH Jun 24, 00:49 UTCJun 24, 02:15 UTC1h 25m
2026-06-23 BCS435 - Jun 23, 21:34 UTCJun 23, 23:10 UTC1h 35m

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 Jul 25, 15:30 UTC.
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 20 distinct callsigns, including BCS8VJ, BCS3789, BCS12P, BCS435, BCS437.