Apparatus

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sensors Mode-S transponder

451DAD

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-CGT · BOEING 737-400

Hex
451DAD
Octal
21216655
Decimal
4,529,581
Country
BG
Tail
LZ-CGT
Type
B734
No current signal · last broadcast 8h ago
Flights observed
216
Distinct callsigns
20
Country
BG
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 451DAD.

Country allocation

The ICAO 24-bit address 451DAD 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
BCS942 European Air Transport 45 2026-06-12
BCS943 European Air Transport 36 2026-06-11
BCS236P - 25 2026-07-14
BCS460 - 20 2026-07-14
BCS2204 European Air Transport 20 2026-06-12
BCS4243 - 18 2026-07-13
BCS80A - 6 2026-07-03
BCS947 European Air Transport 5 2026-05-08
BCS7XA European Air Transport 5 2026-07-12
BCS9009 - 3 2026-07-04
BCS9008 - 3 2026-07-04
BCS7CW - 3 2026-05-19
BCS6RU European Air Transport 3 2026-05-19
BCS87W - 2 2026-05-18
BCS7AG European Air Transport 2 2026-06-08
BCS71R European Air Transport 2 2026-05-22
BCS5959 - 2 2026-05-22
BCS4850 European Air Transport 2 2026-05-17
BCS942P European Air Transport 1 2026-06-09
BCS857P - 1 2026-06-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 BCS236P BCN → MUC Jul 14, 03:40 UTCJul 14, 05:20 UTC1h 40m
2026-07-14 BCS460 MXP → BCN Jul 14, 01:05 UTCJul 14, 02:10 UTC1h 5m
2026-07-13 BCS4243 MUC → MXP Jul 13, 20:40 UTCJul 13, 21:25 UTC45m
2026-07-13 BCS236P BUD → MUC Jul 13, 17:50 UTCJul 13, 19:00 UTC1h 10m
2026-07-12 BCS7XA LEJ → LEJ Jul 12, 18:35 UTCJul 12, 19:35 UTC1h 0m
2026-07-04 BCS9009 - Jul 4, 13:45 UTCJul 4, 15:50 UTC2h 5m
2026-07-04 BCS9008 LEJ → SOF Jul 4, 03:55 UTCJul 4, 05:35 UTC1h 40m
2026-07-03 BCS80A MXP → LEJ Jul 3, 20:25 UTCJul 3, 21:45 UTC1h 20m
2026-07-03 BCS236P BCN → MXP Jul 3, 03:20 UTCJul 3, 04:30 UTC1h 10m
2026-07-03 BCS460 MXP → BCN Jul 3, 00:50 UTCJul 3, 01:55 UTC1h 5m
2026-07-02 BCS4243 MUC → MXP Jul 2, 20:50 UTCJul 2, 21:35 UTC45m
2026-07-02 BCS236P BCN → MUC Jul 2, 03:35 UTCJul 2, 05:35 UTC2h 0m
2026-07-02 BCS460 - Jul 2, 01:10 UTCJul 2, 02:10 UTC1h 0m
2026-07-01 BCS4243 MUC → MXP Jul 1, 20:40 UTCJul 1, 21:30 UTC50m
2026-07-01 BCS236P BCN → MUC Jul 1, 04:45 UTCJul 1, 06:30 UTC1h 45m
2026-07-01 BCS460 MXP → BCN Jul 1, 00:55 UTCJul 1, 02:00 UTC1h 5m
2026-06-30 BCS4243 MUC → MXP Jun 30, 20:50 UTCJun 30, 21:35 UTC45m
2026-06-30 BCS236P BCN → MUC Jun 30, 03:40 UTCJun 30, 05:20 UTC1h 40m
2026-06-30 BCS460 MXP → BCN Jun 30, 01:14 UTCJun 30, 02:20 UTC1h 6m
2026-06-29 BCS236P - Jun 29, 19:00 UTCJun 29, 20:30 UTC1h 30m
2026-06-28 BCS7XA LEJ → LEJ Jun 28, 18:44 UTCJun 28, 19:44 UTC1h 0m
2026-06-26 BCS80A MXP → LEJ Jun 26, 20:20 UTCJun 26, 21:35 UTC1h 15m
2026-06-26 BCS236P BCN → MXP Jun 26, 03:24 UTCJun 26, 04:39 UTC1h 15m
2026-06-26 BCS460 MXP → BCN Jun 26, 00:55 UTCJun 26, 02:00 UTC1h 5m
2026-06-25 BCS4243 MUC → MXP Jun 25, 20:45 UTCJun 25, 21:35 UTC50m
2026-06-25 BCS236P BCN → MUC Jun 25, 03:29 UTCJun 25, 05:15 UTC1h 45m
2026-06-25 BCS460 MXP → BCN Jun 25, 00:55 UTCJun 25, 01:59 UTC1h 5m
2026-06-24 BCS4243 MUC → MXP Jun 24, 20:49 UTCJun 24, 21:40 UTC50m
2026-06-24 BCS236P BCN → MUC Jun 24, 03:40 UTCJun 24, 05:34 UTC1h 55m
2026-06-24 BCS460 MXP → BCN Jun 24, 01:19 UTCJun 24, 02:24 UTC1h 5m
2026-06-23 BCS4243 MUC → MXP Jun 23, 20:44 UTCJun 23, 21:34 UTC50m
2026-06-23 BCS236P BCN → MUC Jun 23, 03:34 UTCJun 23, 05:15 UTC1h 40m
2026-06-23 BCS460 MXP → BCN Jun 23, 01:15 UTCJun 23, 02:15 UTC1h 0m
2026-06-22 BCS4243 MUC → MXP Jun 22, 21:00 UTCJun 22, 21:45 UTC45m
2026-06-22 BCS236P BUD → MUC Jun 22, 17:44 UTCJun 22, 18:44 UTC1h 0m
2026-06-21 BCS7XA LEJ → LEJ Jun 21, 18:50 UTCJun 21, 19:55 UTC1h 5m
2026-06-19 BCS80A MXP → LEJ Jun 19, 20:29 UTCJun 19, 21:44 UTC1h 15m
2026-06-19 BCS236P BCN → MXP Jun 19, 03:20 UTCJun 19, 04:50 UTC1h 30m
2026-06-19 BCS460 MXP → BCN Jun 19, 00:45 UTCJun 19, 01:59 UTC1h 15m
2026-06-18 BCS4243 MUC → MXP Jun 18, 20:45 UTCJun 18, 21:35 UTC50m
2026-06-18 BCS236P BCN → MUC Jun 18, 03:30 UTCJun 18, 05:15 UTC1h 45m
2026-06-18 BCS460 MXP → BCN Jun 18, 00:55 UTCJun 18, 02:05 UTC1h 10m
2026-06-17 BCS4243 MUC → MXP Jun 17, 20:50 UTCJun 17, 21:40 UTC50m
2026-06-17 BCS236P BCN → MUC Jun 17, 03:20 UTCJun 17, 05:10 UTC1h 50m
2026-06-17 BCS460 MXP → BCN Jun 17, 00:55 UTCJun 17, 02:05 UTC1h 10m
2026-06-16 BCS4243 MUC → MXP Jun 16, 20:40 UTCJun 16, 21:25 UTC45m
2026-06-16 BCS236P BCN → MUC Jun 16, 03:30 UTCJun 16, 05:20 UTC1h 50m
2026-06-16 BCS460 MXP → BCN Jun 16, 01:04 UTCJun 16, 02:09 UTC1h 5m
2026-06-15 BCS4243 MUC → MXP Jun 15, 20:45 UTCJun 15, 21:35 UTC50m
2026-06-15 BCS236P - Jun 15, 17:50 UTCJun 15, 18:55 UTC1h 5m

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

Mode-S 451DAD frequently asked

What is Mode-S code 451DAD?
451DAD is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-CGT.
Where is Mode-S 451DAD registered?
Mode-S code 451DAD is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 451DAD broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 451DAD, octal 21216655, decimal 4,529,581.
What flights does 451DAD operate?
Mode-S 451DAD has broadcast 20 distinct callsigns, including BCS942, BCS943, BCS236P, BCS460, BCS2204.