Apparatus

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sensors Mode-S transponder

452037

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-LAE · AIRBUS A-320

Hex
452037
Octal
21220067
Decimal
4,530,231
Country
BG
Tail
LZ-LAE
Type
A320
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
324
Distinct callsigns
20
Country
BG
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S 452037.

Country allocation

The ICAO 24-bit address 452037 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
GPX8TD - 43 2026-07-24
GPX8DT - 43 2026-07-26
GPX8KW - 34 2026-07-25
GPX8WK - 32 2026-07-23
GPX5SA - 32 2026-07-12
GPX5AS - 32 2026-07-12
GPX5PZ GP Aviation 11 2026-07-19
GPX6UC - 10 2026-07-01
GPX6CU GP Aviation 10 2026-07-01
GPX5ZP - 10 2026-07-19
GPX6YN - 8 2026-06-27
GPX6NY - 8 2026-06-27
GPX4VA GP Aviation 6 2026-07-22
GPX4AV GP Aviation 6 2026-07-22
GPX9RE - 5 2026-07-26
GPX9ER - 5 2026-07-26
GPX2MI GP Aviation 5 2026-05-26
GPX2IM GP Aviation 5 2026-05-26
GPX3XJ - 3 2026-07-12
GPX3JX - 3 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 GPX9RE - Jul 26, 21:05 UTCJul 26, 21:45 UTC40m
2026-07-26 GPX9ER - Jul 26, 12:05 UTCJul 26, 19:40 UTC7h 35m
2026-07-26 GPX8DT DUS → DUS Jul 26, 05:50 UTCJul 26, 11:00 UTC5h 11m
2026-07-25 GPX24UL - Jul 25, 19:15 UTCJul 26, 04:20 UTC9h 5m
2026-07-25 GPX8KW DUS → DUS Jul 25, 12:35 UTCJul 25, 18:00 UTC5h 25m
2026-07-24 GPX8DT - Jul 24, 18:55 UTCJul 25, 11:05 UTC16h 10m
2026-07-24 GPX8KW - Jul 24, 15:25 UTCJul 24, 17:35 UTC2h 10m
2026-07-24 GPX8TD - Jul 24, 12:20 UTCJul 24, 14:00 UTC1h 40m
2026-07-24 GPX8DT - Jul 24, 08:30 UTCJul 24, 10:40 UTC2h 10m
2026-07-23 GPX8WK - Jul 23, 19:00 UTCJul 23, 20:40 UTC1h 40m
2026-07-23 GPX8KW - Jul 23, 15:40 UTCJul 23, 17:50 UTC2h 10m
2026-07-23 GPX8TD - Jul 23, 12:25 UTCJul 23, 14:05 UTC1h 40m
2026-07-23 GPX8DT - Jul 23, 08:35 UTCJul 23, 10:45 UTC2h 10m
2026-07-22 GPX4VA HAJ → PRN Jul 22, 20:15 UTCJul 22, 21:55 UTC1h 40m
2026-07-22 GPX4AV PRN → HAJ Jul 22, 16:50 UTCJul 22, 19:00 UTC2h 10m
2026-07-22 GPX8TD - Jul 22, 13:45 UTCJul 22, 15:25 UTC1h 40m
2026-07-22 GPX8DT - Jul 22, 11:20 UTCJul 22, 12:10 UTC50m
2026-07-21 GPX8WK - Jul 21, 19:20 UTCJul 21, 21:05 UTC1h 45m
2026-07-21 GPX8KW - Jul 21, 16:05 UTCJul 21, 18:10 UTC2h 5m
2026-07-21 GPX8TD - Jul 21, 12:10 UTCJul 21, 13:50 UTC1h 40m
2026-07-21 GPX8DT - Jul 21, 08:25 UTCJul 21, 10:35 UTC2h 10m
2026-07-20 GPX8WK - Jul 20, 18:45 UTCJul 20, 20:25 UTC1h 40m
2026-07-20 GPX8KW - Jul 20, 15:10 UTCJul 20, 17:20 UTC2h 10m
2026-07-20 GPX8TD - Jul 20, 12:00 UTCJul 20, 13:50 UTC1h 50m
2026-07-20 GPX8DT - Jul 20, 08:50 UTCJul 20, 10:50 UTC2h 0m
2026-07-19 GPX5ZP - Jul 19, 19:45 UTCJul 19, 21:10 UTC1h 25m
2026-07-19 GPX5PZ PRN → STR Jul 19, 16:40 UTCJul 19, 18:15 UTC1h 35m
2026-07-19 GPX4GL - Jul 19, 13:15 UTCJul 19, 14:50 UTC1h 35m
2026-07-19 GPX4LG - Jul 19, 09:50 UTCJul 19, 11:45 UTC1h 55m
2026-07-19 GPX24LU - Jul 19, 06:10 UTCJul 19, 08:00 UTC1h 50m
2026-07-19 GPX24UL - Jul 19, 02:30 UTCJul 19, 04:35 UTC2h 5m
2026-07-18 GPX4VA HAJ → PRN Jul 18, 19:50 UTCJul 18, 21:35 UTC1h 45m
2026-07-18 GPX4AV - Jul 18, 16:10 UTCJul 18, 18:00 UTC1h 50m
2026-07-18 GPX4GH HAM → HAM Jul 18, 12:30 UTCJul 18, 14:25 UTC1h 55m
2026-07-18 GPX4HG PRN → HAM Jul 18, 09:00 UTCJul 18, 11:05 UTC2h 5m
2026-07-17 GPX8WK - Jul 17, 19:25 UTCJul 17, 21:05 UTC1h 40m
2026-07-17 GPX8KW - Jul 17, 15:29 UTCJul 17, 17:40 UTC2h 10m
2026-07-17 GPX8TD - Jul 17, 12:04 UTCJul 17, 13:50 UTC1h 45m
2026-07-17 GPX8DT - Jul 17, 08:35 UTCJul 17, 10:35 UTC2h 0m
2026-07-16 GPX8WK - Jul 16, 19:14 UTCJul 16, 21:00 UTC1h 45m
2026-07-16 GPX8KW - Jul 16, 15:35 UTCJul 16, 17:49 UTC2h 15m
2026-07-16 GPX8TD - Jul 16, 12:20 UTCJul 16, 14:00 UTC1h 40m
2026-07-16 GPX8DT - Jul 16, 08:30 UTCJul 16, 10:40 UTC2h 10m
2026-07-15 GPX8WK - Jul 15, 20:05 UTCJul 15, 21:45 UTC1h 40m
2026-07-15 GPX8KW - Jul 15, 15:45 UTCJul 15, 18:00 UTC2h 15m
2026-07-15 GPX8TD - Jul 15, 12:25 UTCJul 15, 14:10 UTC1h 45m
2026-07-15 GPX8DT - Jul 15, 08:40 UTCJul 15, 10:55 UTC2h 15m
2026-07-14 GPX8WK - Jul 14, 18:45 UTCJul 14, 20:25 UTC1h 40m
2026-07-14 GPX8KW - Jul 14, 15:15 UTCJul 14, 17:30 UTC2h 15m
2026-07-13 GPX8WK - Jul 13, 18:45 UTCJul 13, 20:25 UTC1h 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-LAE page for operator, model, and routing details .

Mode-S 452037 frequently asked

What is Mode-S code 452037?
452037 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-LAE.
Where is Mode-S 452037 registered?
Mode-S code 452037 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 452037 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 452037, octal 21220067, decimal 4,530,231.
What flights does 452037 operate?
Mode-S 452037 has broadcast 20 distinct callsigns, including GPX8TD, GPX8DT, GPX8KW, GPX8WK, GPX5SA.