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
Broadcasting now · callsign LZB851 · 36,000 ft
Flights observed
231
Distinct callsigns
20
Country
BG
Last broadcast
33m ago

Current position

452122 is currently broadcasting. Map zoomed to live position.

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
LZB851 Bulgaria Air 15 2026-05-30
LZB431 Bulgaria Air 15 2026-05-27
LZB978 Bulgaria Air 14 2026-05-27
LZB977 Bulgaria Air 14 2026-05-27
LZB432 Bulgaria Air 14 2026-05-27
LZB974 Bulgaria Air 13 2026-05-28
LZB973 Bulgaria Air 13 2026-05-28
LZB971 Bulgaria Air 12 2026-05-29
LZB852 Bulgaria Air 12 2026-05-29
LZB471 Bulgaria Air 11 2026-05-25
LZB972 Bulgaria Air 9 2026-05-29
LZB472 Bulgaria Air 9 2026-05-25
LZB462 Bulgaria Air 9 2026-05-22
LZB461 Bulgaria Air 8 2026-05-22
LZB408 Bulgaria Air 6 2026-05-22
LZB407 Bulgaria Air 6 2026-05-22
LZB456 Bulgaria Air 5 2026-05-24
LZB455 Bulgaria Air 5 2026-05-24
LZB450 Bulgaria Air 5 2026-05-28
LZB449 Bulgaria Air 5 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 LZB851 SOF → LHR May 30, 03:45 UTCMay 30, 04:30 UTC45m
2026-05-29 LZB852 LHR → SOF May 29, 17:30 UTCMay 29, 20:00 UTC2h 30m
2026-05-29 LZB851 SOF → LHR May 29, 13:00 UTCMay 29, 16:10 UTC3h 10m
2026-05-29 LZB972 VAR → SOF May 29, 05:50 UTCMay 29, 06:20 UTC30m
2026-05-29 LZB971 SOF → VAR May 29, 04:20 UTCMay 29, 04:50 UTC30m
2026-05-28 LZB974 VAR → SOF May 28, 19:30 UTCMay 28, 19:45 UTC15m
2026-05-28 LZB973 SOF → VAR May 28, 17:55 UTCMay 28, 18:25 UTC30m
2026-05-28 LZB808 ATH → SOF May 28, 15:55 UTCMay 28, 16:40 UTC45m
2026-05-28 LZB807 SOF → ATH May 28, 13:40 UTCMay 28, 14:35 UTC55m
2026-05-28 LZB450 FCO → SOF May 28, 07:30 UTCMay 28, 08:50 UTC1h 20m
2026-05-28 LZB449 SOF → FCO May 28, 04:15 UTCMay 28, 05:45 UTC1h 30m
2026-05-27 LZB974 VAR → SOF May 27, 19:20 UTCMay 27, 19:35 UTC15m
2026-05-27 LZB973 SOF → VAR May 27, 17:50 UTCMay 27, 18:20 UTC30m
2026-05-27 LZB978 VAR → SOF May 27, 14:05 UTCMay 27, 14:20 UTC15m
2026-05-27 LZB977 SOF → VAR May 27, 12:35 UTCMay 27, 13:05 UTC30m
2026-05-27 LZB432 CDG → SOF May 27, 08:45 UTCMay 27, 11:10 UTC2h 25m
2026-05-27 LZB431 SOF → CDG May 27, 04:14 UTCMay 27, 06:49 UTC2h 35m
2026-05-26 LZB478 BCN → SOF May 26, 14:50 UTCMay 26, 17:20 UTC2h 30m
2026-05-26 LZB477 SOF → BCN May 26, 10:10 UTCMay 26, 12:40 UTC2h 30m
2026-05-26 LZB450 FCO → SOF May 26, 07:24 UTCMay 26, 08:50 UTC1h 25m
2026-05-26 LZB449 SOF → FCO May 26, 04:20 UTCMay 26, 05:45 UTC1h 25m
2026-05-25 LZB974 VAR → SOF May 25, 19:30 UTCMay 25, 19:44 UTC15m
2026-05-25 LZB973 SOF → VAR May 25, 17:55 UTCMay 25, 18:25 UTC30m
2026-05-25 LZB472 MAD → SOF May 25, 12:35 UTCMay 25, 15:55 UTC3h 20m
2026-05-25 LZB471 SOF → MAD May 25, 07:50 UTCMay 25, 10:45 UTC2h 55m
2026-05-24 LZB456 MXP → SOF May 24, 15:15 UTCMay 24, 17:00 UTC1h 45m
2026-05-24 LZB455 SOF → MXP May 24, 12:15 UTCMay 24, 13:50 UTC1h 35m
2026-05-24 LZB852 LHR → SOF May 24, 08:10 UTCMay 24, 10:55 UTC2h 45m
2026-05-24 LZB851 SOF → LHR May 24, 03:50 UTCMay 24, 06:45 UTC2h 55m
2026-05-23 LZB478 BCN → SOF May 23, 14:30 UTCMay 23, 17:00 UTC2h 30m
2026-05-23 LZB477 SOF → BCN May 23, 10:25 UTCMay 23, 12:50 UTC2h 25m
2026-05-23 LZB450 FCO → SOF May 23, 07:25 UTCMay 23, 08:50 UTC1h 25m
2026-05-23 LZB449 SOF → FCO May 23, 04:20 UTCMay 23, 05:55 UTC1h 35m
2026-05-22 LZB408 BRU → SOF May 22, 20:50 UTCMay 22, 23:00 UTC2h 10m
2026-05-22 LZB407 SOF → BRU May 22, 17:20 UTCMay 22, 19:40 UTC2h 20m
2026-05-22 LZB978 VAR → SOF May 22, 14:15 UTCMay 22, 14:35 UTC20m
2026-05-22 LZB977 SOF → VAR May 22, 12:40 UTCMay 22, 13:15 UTC35m
2026-05-22 LZB462 AMS → SOF May 22, 08:50 UTCMay 22, 11:05 UTC2h 15m
2026-05-22 LZB461 SOF → AMS May 22, 04:20 UTCMay 22, 06:50 UTC2h 30m
2026-05-21 LZB974 VAR → SOF May 21, 19:25 UTCMay 21, 19:45 UTC20m
2026-05-21 LZB973 SOF → VAR May 21, 17:55 UTCMay 21, 18:30 UTC35m
2026-05-21 LZB978 VAR → SOF May 21, 13:35 UTCMay 21, 13:55 UTC20m
2026-05-21 LZB977 SOF → VAR May 21, 12:20 UTCMay 21, 12:55 UTC35m
2026-05-21 LZB450 FCO → SOF May 21, 07:25 UTCMay 21, 08:40 UTC1h 15m
2026-05-21 LZB449 SOF → FCO May 21, 04:20 UTCMay 21, 05:45 UTC1h 25m
2026-05-20 LZB974 VAR → SOF May 20, 19:25 UTCMay 20, 19:45 UTC20m
2026-05-20 LZB973 SOF → VAR May 20, 18:15 UTCMay 20, 18:45 UTC30m
2026-05-20 LZB462 AMS → SOF May 20, 08:50 UTCMay 20, 11:00 UTC2h 10m
2026-05-20 LZB461 SOF → AMS May 20, 04:15 UTCMay 20, 06:40 UTC2h 26m
2026-05-19 LZB974 VAR → SOF May 19, 19:10 UTCMay 19, 19:25 UTC15m

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?
Yes. Mode-S 452122 is currently airborne.
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 LZB851, LZB431, LZB978, LZB977, LZB432.