Apparatus

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sensors Mode-S transponder

452175

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-PPL · CESSNA 525A Citation CJ2

Hex
452175
Octal
21220565
Decimal
4,530,549
Country
BG
Tail
LZ-PPL
Type
C25A
No current signal · last broadcast 25d ago
Flights observed
110
Distinct callsigns
1
Country
BG
Last broadcast
25d ago

Last known position

Most recent position reported by Mode-S 452175.

Country allocation

The ICAO 24-bit address 452175 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 1 distinct

Callsign Airline Flights Last seen
PJJ525A - 110 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 PJJ525A - Jul 25, 00:55 UTCJul 25, 01:30 UTC35m
2026-07-24 PJJ525A - Jul 24, 19:35 UTCJul 25, 00:20 UTC4h 45m
2026-07-24 PJJ525A - Jul 24, 09:30 UTCJul 24, 10:00 UTC30m
2026-07-23 PJJ525A - Jul 23, 13:20 UTCJul 24, 10:00 UTC20h 40m
2026-07-23 PJJ525A - Jul 23, 11:20 UTCJul 24, 10:00 UTC22h 40m
2026-07-23 PJJ525A - Jul 23, 10:55 UTCJul 23, 13:35 UTC2h 40m
2026-07-23 PJJ525A SOF → SKG Jul 23, 09:20 UTCJul 23, 10:00 UTC40m
2026-07-21 PJJ525A - Jul 21, 05:05 UTCJul 21, 06:10 UTC1h 5m
2026-07-21 PJJ525A - Jul 21, 01:30 UTCJul 21, 02:35 UTC1h 5m
2026-07-19 PJJ525A SKG → SOF Jul 19, 17:50 UTCJul 19, 18:20 UTC30m
2026-07-19 PJJ525A BUS → SKG Jul 19, 13:55 UTCJul 19, 16:20 UTC2h 25m
2026-07-18 PJJ525A - Jul 18, 06:25 UTCJul 18, 07:35 UTC1h 10m
2026-07-17 PJJ525A SOF → SKG Jul 17, 13:10 UTCJul 17, 13:40 UTC30m
2026-07-17 PJJ525A - Jul 17, 06:00 UTCJul 17, 06:29 UTC30m
2026-07-17 PJJ525A - Jul 17, 04:39 UTCJul 17, 05:15 UTC35m
2026-07-14 PJJ525A - Jul 14, 13:55 UTCJul 14, 14:20 UTC25m
2026-07-14 PJJ525A - Jul 14, 11:50 UTCJul 14, 12:45 UTC55m
2026-07-14 PJJ525A - Jul 14, 10:00 UTCJul 14, 10:45 UTC45m
2026-07-13 PJJ525A HER → SOF Jul 13, 07:01 UTCJul 13, 08:05 UTC1h 5m
2026-07-13 PJJ525A - Jul 13, 04:55 UTCJul 13, 05:25 UTC30m
2026-07-12 PJJ525A - Jul 12, 16:15 UTCJul 12, 16:40 UTC25m
2026-07-12 PJJ525A - Jul 12, 13:45 UTCJul 12, 15:50 UTC2h 5m
2026-07-12 PJJ525A NCE → PSA Jul 12, 12:20 UTCJul 12, 12:50 UTC30m
2026-07-12 PJJ525A - Jul 12, 09:45 UTCJul 12, 10:25 UTC40m
2026-07-11 PJJ525A ATH → GVA Jul 11, 14:45 UTCJul 11, 17:30 UTC2h 45m
2026-07-11 PJJ525A - Jul 11, 10:30 UTCJul 11, 12:45 UTC2h 15m
2026-07-10 PJJ525A - Jul 10, 17:15 UTCJul 10, 19:30 UTC2h 15m
2026-07-09 PJJ525A - Jul 9, 21:40 UTCJul 9, 22:20 UTC40m
2026-07-09 PJJ525A - Jul 9, 20:15 UTCJul 9, 21:00 UTC45m
2026-07-09 PJJ525A SOF → JMK Jul 9, 18:30 UTCJul 9, 20:05 UTC1h 35m
2026-07-08 PJJ525A - Jul 8, 13:20 UTCJul 8, 14:15 UTC55m
2026-07-08 PJJ525A - Jul 8, 10:20 UTCJul 8, 12:30 UTC2h 10m
2026-07-08 PJJ525A - Jul 8, 07:05 UTCJul 8, 09:05 UTC2h 0m
2026-07-06 PJJ525A - Jul 6, 19:30 UTCJul 6, 20:15 UTC45m
2026-07-06 PJJ525A - Jul 6, 17:15 UTCJul 6, 18:15 UTC1h 0m
2026-07-06 PJJ525A NCE → JMK Jul 6, 14:20 UTCJul 6, 16:40 UTC2h 20m
2026-07-06 PJJ525A SOF → NCE Jul 6, 10:05 UTCJul 6, 12:10 UTC2h 5m
2026-07-04 PJJ525A - Jul 4, 12:30 UTCJul 4, 13:05 UTC35m
2026-07-04 PJJ525A - Jul 4, 07:30 UTCJul 4, 09:20 UTC1h 50m
2026-07-04 PJJ525A BUD → PSA Jul 4, 04:30 UTCJul 4, 05:50 UTC1h 20m
2026-07-03 PJJ525A - Jul 3, 13:05 UTCJul 3, 15:10 UTC2h 5m
2026-07-03 PJJ525A - Jul 3, 10:00 UTCJul 3, 11:25 UTC1h 25m
2026-07-02 PJJ525A ZRH → FKB Jul 2, 16:25 UTCJul 2, 16:55 UTC30m
2026-07-02 PJJ525A - Jul 2, 14:50 UTCJul 2, 15:30 UTC40m
2026-07-02 PJJ525A HAM → LUX Jul 2, 12:35 UTCJul 2, 13:30 UTC55m
2026-07-01 PJJ525A SOF → HAM Jul 1, 08:25 UTCJul 1, 10:45 UTC2h 20m
2026-06-29 PJJ525A - Jun 29, 17:19 UTCJun 29, 17:59 UTC40m
2026-06-29 PJJ525A - Jun 29, 15:54 UTCJun 29, 16:29 UTC35m
2026-06-29 PJJ525A - Jun 29, 07:15 UTCJun 29, 09:44 UTC2h 30m
2026-06-28 PJJ525A MXP → HAM Jun 28, 18:25 UTCJun 28, 19:44 UTC1h 20m

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

Mode-S 452175 frequently asked

What is Mode-S code 452175?
452175 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-PPL.
Where is Mode-S 452175 registered?
Mode-S code 452175 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 452175 broadcasting right now?
No active broadcast right now. Last signal was 25d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 452175, octal 21220565, decimal 4,530,549.
What flights does 452175 operate?
Mode-S 452175 has broadcast 1 distinct callsign, including PJJ525A.