Apparatus

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sensors Mode-S transponder

452122

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-LON · AIRBUS A220-300

Hex
452122
Octal
21220442
Decimal
4,530,466
Country
BG
Tail
LZ-LON
Type
BCS3
No current signal · last broadcast Jul 26, 21:25 UTC
Flights observed
502
Distinct callsigns
20
Country
BG
Last broadcast
Jul 26, 21:25 UTC

Last known position

Most recent position reported by Mode-S 452122.

Country allocation

The ICAO 24-bit address 452122 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
LZB431 Bulgaria Air 29 2026-07-24
LZB978 Bulgaria Air 28 2026-07-26
LZB977 Bulgaria Air 28 2026-07-26
LZB432 Bulgaria Air 28 2026-07-24
LZB851 Bulgaria Air 26 2026-07-26
LZB971 Bulgaria Air 25 2026-07-25
LZB973 Bulgaria Air 24 2026-07-24
LZB852 Bulgaria Air 24 2026-07-26
LZB974 Bulgaria Air 23 2026-07-24
LZB972 Bulgaria Air 22 2026-07-25
LZB471 Bulgaria Air 22 2026-07-22
LZB462 Bulgaria Air 22 2026-07-21
LZB472 Bulgaria Air 20 2026-07-22
LZB461 Bulgaria Air 20 2026-07-21
LZB408 Bulgaria Air 12 2026-07-26
LZB407 Bulgaria Air 12 2026-07-26
LZB808 - 10 2026-06-28
LZB807 Bulgaria Air 10 2026-06-28
LZB456 Bulgaria Air 9 2026-07-24
LZB455 Bulgaria Air 9 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 LZB408 BRU → SOF Jul 26, 19:20 UTCJul 26, 21:25 UTC2h 5m
2026-07-26 LZB407 SOF → BRU Jul 26, 15:35 UTCJul 26, 18:10 UTC2h 35m
2026-07-26 LZB978 VAR → SOF Jul 26, 13:55 UTCJul 26, 14:20 UTC25m
2026-07-26 LZB977 SOF → VAR Jul 26, 12:15 UTCJul 26, 12:45 UTC30m
2026-07-26 LZB852 LHR → SOF Jul 26, 08:25 UTCJul 26, 10:55 UTC2h 30m
2026-07-26 LZB851 SOF → LHR Jul 26, 03:40 UTCJul 26, 06:55 UTC3h 16m
2026-07-25 LZB984 BOJ → SOF Jul 25, 19:45 UTCJul 25, 20:20 UTC35m
2026-07-25 LZB983 SOF → BOJ Jul 25, 18:20 UTCJul 25, 18:55 UTC35m
2026-07-25 LZB972 VAR → SOF Jul 25, 17:00 UTCJul 25, 17:35 UTC35m
2026-07-25 LZB971 SOF → VAR Jul 25, 15:35 UTCJul 25, 16:15 UTC40m
2026-07-25 LZB852 LHR → SOF Jul 25, 08:20 UTCJul 25, 11:00 UTC2h 40m
2026-07-25 LZB851 SOF → LHR Jul 25, 03:40 UTCJul 25, 06:45 UTC3h 5m
2026-07-24 LZB974 VAR → SOF Jul 24, 19:40 UTCJul 24, 20:10 UTC30m
2026-07-24 LZB973 SOF → VAR Jul 24, 18:10 UTCJul 24, 18:55 UTC45m
2026-07-24 LZB456 MXP → SOF Jul 24, 15:35 UTCJul 24, 17:10 UTC1h 35m
2026-07-24 LZB455 SOF → MXP Jul 24, 12:25 UTCJul 24, 14:20 UTC1h 55m
2026-07-24 LZB432 CDG → SOF Jul 24, 08:55 UTCJul 24, 11:05 UTC2h 10m
2026-07-24 LZB431 SOF → CDG Jul 24, 04:10 UTCJul 24, 06:55 UTC2h 45m
2026-07-23 LZB408 BRU → SOF Jul 23, 18:40 UTCJul 23, 20:55 UTC2h 15m
2026-07-23 LZB407 SOF → BRU Jul 23, 15:25 UTCJul 23, 17:50 UTC2h 25m
2026-07-23 LZB978 VAR → SOF Jul 23, 13:50 UTCJul 23, 14:25 UTC35m
2026-07-23 LZB977 SOF → VAR Jul 23, 12:15 UTCJul 23, 12:50 UTC35m
2026-07-23 LZB432 CDG → SOF Jul 23, 08:40 UTCJul 23, 10:50 UTC2h 10m
2026-07-23 LZB431 SOF → CDG Jul 23, 04:10 UTCJul 23, 07:00 UTC2h 50m
2026-07-22 LZB852 LHR → SOF Jul 22, 17:50 UTCJul 22, 20:20 UTC2h 30m
2026-07-22 LZB851 SOF → LHR Jul 22, 12:45 UTCJul 22, 16:00 UTC3h 15m
2026-07-22 LZB472 MAD → SOF Jul 22, 11:10 UTCJul 22, 11:30 UTC20m
2026-07-22 LZB471 SOF → MAD Jul 22, 03:45 UTCJul 22, 05:25 UTC1h 40m
2026-07-21 LZB408 BRU → SOF Jul 21, 18:50 UTCJul 21, 20:55 UTC2h 5m
2026-07-21 LZB407 SOF → BRU Jul 21, 15:15 UTCJul 21, 17:45 UTC2h 30m
2026-07-21 LZB978 VAR → SOF Jul 21, 13:40 UTCJul 21, 14:20 UTC40m
2026-07-21 LZB977 - Jul 21, 12:15 UTCJul 21, 12:45 UTC30m
2026-07-21 LZB462 AMS → SOF Jul 21, 08:40 UTCJul 21, 10:50 UTC2h 10m
2026-07-21 LZB461 SOF → AMS Jul 21, 04:15 UTCJul 21, 06:50 UTC2h 35m
2026-07-20 LZB472 MAD → SOF Jul 20, 12:50 UTCJul 20, 15:35 UTC2h 45m
2026-07-20 LZB471 - Jul 20, 07:45 UTCJul 20, 11:25 UTC3h 40m
2026-07-20 LZB972 VAR → SOF Jul 20, 05:35 UTCJul 20, 06:10 UTC35m
2026-07-20 LZB971 SOF → VAR Jul 20, 04:10 UTCJul 20, 04:40 UTC30m
2026-07-19 LZB408 - Jul 19, 18:50 UTCJul 19, 20:55 UTC2h 5m
2026-07-19 LZB407 - Jul 19, 15:25 UTCJul 19, 17:50 UTC2h 25m
2026-07-19 LZB978 - Jul 19, 14:10 UTCJul 19, 14:30 UTC20m
2026-07-19 LZB977 - Jul 19, 12:25 UTCJul 19, 12:55 UTC30m
2026-07-19 LZB852 - Jul 19, 08:20 UTCJul 19, 10:50 UTC2h 30m
2026-07-19 LZB851 - Jul 19, 03:50 UTCJul 19, 06:50 UTC3h 0m
2026-07-18 LZB852 LHR → SOF Jul 18, 08:20 UTCJul 18, 10:55 UTC2h 35m
2026-07-18 LZB851 - Jul 18, 03:35 UTCJul 18, 06:45 UTC3h 10m
2026-07-17 LZB438 FRA → SOF Jul 17, 17:55 UTCJul 17, 19:49 UTC1h 55m
2026-07-17 LZB437 - Jul 17, 13:05 UTCJul 17, 15:10 UTC2h 5m
2026-07-17 LZB432 - Jul 17, 09:04 UTCJul 17, 11:20 UTC2h 15m
2026-07-17 LZB431 - Jul 17, 04:25 UTCJul 17, 07:05 UTC2h 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 LZ-LON page for operator, model, and routing details .

Mode-S 452122 frequently asked

What is Mode-S code 452122?
452122 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-LON.
Where is Mode-S 452122 registered?
Mode-S code 452122 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 452122 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 452122, octal 21220442, decimal 4,530,466.
What flights does 452122 operate?
Mode-S 452122 has broadcast 20 distinct callsigns, including LZB431, LZB978, LZB977, LZB432, LZB851.