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sensors Mode-S transponder

452148

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-CVB · CESSNA 560XL Citation XLS

Hex
452148
Octal
21220510
Decimal
4,530,504
Country
BG
Tail
LZ-CVB
Type
C56X
No current signal · last broadcast 3d ago
Flights observed
95
Distinct callsigns
2
Country
BG
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 452148.

Country allocation

The ICAO 24-bit address 452148 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 2 distinct

Callsign Airline Flights Last seen
HLR777 - 87 2026-07-26
HLR555 - 8 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HLR777 - Jul 26, 10:45 UTCJul 26, 12:45 UTC2h 0m
2026-07-26 HLR777 - Jul 26, 04:50 UTCJul 26, 07:35 UTC2h 46m
2026-07-26 HLR777 - Jul 26, 03:35 UTCJul 26, 04:15 UTC40m
2026-07-24 HLR777 - Jul 24, 12:10 UTCJul 24, 13:10 UTC1h 0m
2026-07-24 HLR777 - Jul 24, 09:40 UTCJul 24, 11:15 UTC1h 35m
2026-07-24 HLR777 - Jul 24, 07:10 UTCJul 24, 08:10 UTC1h 0m
2026-07-23 HLR777 - Jul 23, 06:30 UTCJul 23, 07:45 UTC1h 15m
2026-07-23 HLR777 - Jul 23, 04:20 UTCJul 23, 04:55 UTC35m
2026-07-22 HLR777 BEG → SOF Jul 22, 14:10 UTCJul 22, 14:50 UTC40m
2026-07-18 HLR555 BEG → SOF Jul 18, 08:05 UTCJul 18, 08:40 UTC35m
2026-07-16 HLR555 BEG → BEG Jul 16, 13:20 UTCJul 16, 13:34 UTC15m
2026-07-15 HLR777 BEG → BEG Jul 15, 06:10 UTCJul 15, 06:25 UTC15m
2026-07-13 HLR777 - Jul 13, 12:45 UTCJul 13, 13:20 UTC35m
2026-07-13 HLR777 - Jul 13, 10:30 UTCJul 13, 11:25 UTC55m
2026-07-13 HLR777 - Jul 13, 08:55 UTCJul 13, 09:30 UTC35m
2026-07-12 HLR777 - Jul 12, 09:30 UTCJul 12, 11:20 UTC1h 50m
2026-07-12 HLR777 - Jul 12, 05:55 UTCJul 12, 07:45 UTC1h 50m
2026-07-11 HLR777 - Jul 11, 18:05 UTCJul 11, 19:10 UTC1h 5m
2026-07-10 HLR777 - Jul 10, 15:50 UTCJul 10, 17:15 UTC1h 25m
2026-07-10 HLR777 - Jul 10, 13:00 UTCJul 10, 13:30 UTC30m
2026-07-10 HLR777 BEG → BEG Jul 10, 08:40 UTCJul 10, 09:20 UTC40m
2026-06-30 HLR777 - Jun 30, 10:40 UTCJun 30, 12:15 UTC1h 35m
2026-06-30 HLR777 - Jun 30, 07:15 UTCJun 30, 09:15 UTC2h 0m
2026-06-27 HLR777 - Jun 27, 11:30 UTCJun 27, 14:05 UTC2h 35m
2026-06-27 HLR777 - Jun 27, 06:15 UTCJun 27, 09:00 UTC2h 45m
2026-06-26 HLR777 - Jun 26, 13:55 UTCJun 26, 14:55 UTC1h 0m
2026-06-26 HLR777 NCE → OLB Jun 26, 10:39 UTCJun 26, 11:24 UTC45m
2026-06-25 HLR777 ATH → NCE Jun 25, 15:29 UTCJun 25, 17:49 UTC2h 20m
2026-06-25 HLR777 - Jun 25, 13:05 UTCJun 25, 14:24 UTC1h 20m
2026-06-25 HLR777 - Jun 25, 09:59 UTCJun 25, 11:25 UTC1h 25m
2026-06-25 HLR777 - Jun 25, 07:59 UTCJun 25, 08:14 UTC15m
2026-06-23 HLR777 - Jun 23, 17:50 UTCJun 23, 18:10 UTC20m
2026-06-23 HLR777 - Jun 23, 13:59 UTCJun 23, 16:29 UTC2h 30m
2026-06-22 HLR777 - Jun 22, 11:00 UTCJun 22, 12:30 UTC1h 30m
2026-06-22 HLR777 - Jun 22, 08:50 UTCJun 22, 09:24 UTC35m
2026-06-20 HLR777 - Jun 20, 14:24 UTCJun 20, 14:59 UTC35m
2026-06-20 HLR777 - Jun 20, 12:19 UTCJun 20, 13:44 UTC1h 25m
2026-06-18 HLR777 - Jun 18, 14:40 UTCJun 18, 17:05 UTC2h 25m
2026-06-16 HLR777 - Jun 16, 11:10 UTCJun 16, 13:19 UTC2h 10m
2026-06-16 HLR777 - Jun 16, 07:50 UTCJun 16, 09:00 UTC1h 10m
2026-06-14 HLR777 NCE → SZG Jun 14, 14:55 UTCJun 14, 15:55 UTC1h 0m
2026-06-14 HLR777 BEG → NCE Jun 14, 11:35 UTCJun 14, 13:35 UTC2h 0m
2026-06-12 HLR777 - Jun 12, 12:35 UTCJun 12, 13:25 UTC50m
2026-06-12 HLR777 BCN → SKG Jun 12, 09:20 UTCJun 12, 11:50 UTC2h 30m
2026-06-11 HLR777 - Jun 11, 17:50 UTCJun 11, 18:45 UTC55m
2026-06-11 HLR777 - Jun 11, 14:20 UTCJun 11, 16:25 UTC2h 5m
2026-06-11 HLR777 - Jun 11, 12:10 UTCJun 11, 13:00 UTC50m
2026-06-10 HLR777 - Jun 10, 13:10 UTCJun 10, 14:10 UTC1h 0m
2026-06-10 HLR777 - Jun 10, 09:40 UTCJun 10, 12:10 UTC2h 30m
2026-06-08 HLR777 - Jun 8, 12:55 UTCJun 8, 14:45 UTC1h 50m

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

Mode-S 452148 frequently asked

What is Mode-S code 452148?
452148 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-CVB.
Where is Mode-S 452148 registered?
Mode-S code 452148 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 452148 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 452148, octal 21220510, decimal 4,530,504.
What flights does 452148 operate?
Mode-S 452148 has broadcast 2 distinct callsigns, including HLR777, HLR555.