Apparatus

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sensors Mode-S transponder

4520EA

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-CXA · BOEING 737-800

Hex
4520EA
Octal
21220352
Decimal
4,530,410
Country
BG
Tail
LZ-CXA
Type
B738
No current signal · last broadcast 6h ago
Flights observed
53
Distinct callsigns
13
Country
BG
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4520EA.

Country allocation

The ICAO 24-bit address 4520EA 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 13 distinct

Callsign Airline Flights Last seen
ADZ4193 - 20 2026-05-29
ADZ4093 - 14 2026-05-29
TMT7CW - 7 2026-04-16
TMT6RU - 3 2026-04-16
ADZ94Q - 1 2026-05-05
ADZ835P - 1 2026-05-06
ADZ820P - 1 2026-05-05
ADZ4127 Compass Cargo Airlines 1 2026-05-19
ADZ4126 - 1 2026-05-19
ADZ409P - 1 2026-05-20
ADZ3845 - 1 2026-05-12
ADZ3844 - 1 2026-05-12
ADZ1TQ - 1 2026-05-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ADZ4193 NUE → CDG May 29, 21:45 UTCMay 29, 22:50 UTC1h 5m
2026-05-29 ADZ4193 ATH → NUE May 29, 18:15 UTCMay 29, 20:35 UTC2h 20m
2026-05-29 ADZ4193 - May 29, 15:40 UTCMay 29, 17:10 UTC1h 30m
2026-05-29 ADZ4093 - May 29, 06:45 UTCMay 29, 08:00 UTC1h 15m
2026-05-29 ADZ4093 - May 29, 02:50 UTCMay 29, 05:40 UTC2h 50m
2026-05-28 ADZ4193 NUE → CDG May 28, 21:55 UTCMay 28, 22:55 UTC1h 0m
2026-05-28 ADZ4193 ATH → NUE May 28, 18:30 UTCMay 28, 21:00 UTC2h 30m
2026-05-28 ADZ4193 - May 28, 15:25 UTCMay 28, 16:50 UTC1h 25m
2026-05-28 ADZ4093 ATH → AMM May 28, 06:50 UTCMay 28, 08:10 UTC1h 20m
2026-05-28 ADZ4093 - May 28, 02:55 UTCMay 28, 05:40 UTC2h 45m
2026-05-27 ADZ4193 NUE → CDG May 27, 21:30 UTCMay 27, 22:35 UTC1h 5m
2026-05-27 ADZ4193 ATH → NUE May 27, 18:10 UTCMay 27, 20:30 UTC2h 20m
2026-05-27 ADZ4193 - May 27, 15:15 UTCMay 27, 16:35 UTC1h 20m
2026-05-27 ADZ4093 - May 27, 06:55 UTCMay 27, 08:15 UTC1h 20m
2026-05-27 ADZ4093 CDG → ATH May 27, 02:54 UTCMay 27, 05:45 UTC2h 50m
2026-05-26 ADZ4193 NUE → CDG May 26, 21:29 UTCMay 26, 22:39 UTC1h 10m
2026-05-26 ADZ4193 ATH → NUE May 26, 17:55 UTCMay 26, 20:15 UTC2h 20m
2026-05-26 ADZ4193 - May 26, 15:24 UTCMay 26, 16:45 UTC1h 20m
2026-05-26 ADZ4093 ATH → AMM May 26, 07:15 UTCMay 26, 08:30 UTC1h 15m
2026-05-26 ADZ4093 CDG → ATH May 26, 02:55 UTCMay 26, 05:54 UTC3h 0m
2026-05-25 ADZ4193 ATH → CDG May 25, 17:55 UTCMay 25, 20:45 UTC2h 50m
2026-05-25 ADZ4193 - May 25, 15:15 UTCMay 25, 16:40 UTC1h 25m
2026-05-24 ADZ4093 - May 24, 20:35 UTCMay 24, 21:45 UTC1h 10m
2026-05-24 ADZ4093 - May 24, 16:35 UTCMay 24, 19:20 UTC2h 45m
2026-05-22 ADZ4193 NUE → CDG May 22, 21:55 UTCMay 22, 23:00 UTC1h 5m
2026-05-22 ADZ4193 ATH → NUE May 22, 18:20 UTCMay 22, 20:50 UTC2h 30m
2026-05-22 ADZ4193 AMM → ATH May 22, 15:25 UTCMay 22, 16:40 UTC1h 15m
2026-05-22 ADZ4093 ATH → AMM May 22, 06:45 UTCMay 22, 08:00 UTC1h 15m
2026-05-22 ADZ4093 - May 22, 02:50 UTCMay 22, 05:40 UTC2h 50m
2026-05-21 ADZ4193 NUE → CDG May 21, 21:50 UTCMay 21, 22:55 UTC1h 5m
2026-05-21 ADZ4193 ATH → NUE May 21, 18:00 UTCMay 21, 20:45 UTC2h 45m
2026-05-21 ADZ4193 - May 21, 15:15 UTCMay 21, 16:45 UTC1h 30m
2026-05-21 ADZ4093 - May 21, 07:25 UTCMay 21, 08:40 UTC1h 15m
2026-05-21 ADZ4093 - May 21, 03:15 UTCMay 21, 05:55 UTC2h 40m
2026-05-20 ADZ409P LEJ → CDG May 20, 12:15 UTCMay 20, 13:25 UTC1h 10m
2026-05-19 ADZ4127 LNZ → LEJ May 19, 19:45 UTCMay 19, 20:30 UTC45m
2026-05-19 ADZ4126 LEJ → LNZ May 19, 03:40 UTCMay 19, 04:30 UTC50m
2026-05-12 ADZ3845 - May 12, 20:25 UTCMay 12, 21:20 UTC55m
2026-05-12 ADZ3844 LEJ → BLL May 12, 03:45 UTCMay 12, 04:35 UTC50m
2026-05-06 ADZ1TQ - May 6, 20:25 UTCMay 6, 22:20 UTC1h 55m
2026-05-06 ADZ835P - May 6, 17:20 UTCMay 6, 19:20 UTC1h 59m
2026-05-05 ADZ94Q - May 5, 20:25 UTCMay 5, 21:25 UTC1h 0m
2026-05-05 ADZ820P LEJ → GDN May 5, 18:25 UTCMay 5, 19:15 UTC50m
2026-04-16 TMT7CW - Apr 16, 21:14 UTCApr 16, 22:00 UTC45m
2026-04-16 TMT7CW - Apr 16, 20:30 UTCApr 16, 21:10 UTC40m
2026-04-16 TMT6RU - Apr 16, 03:39 UTCApr 16, 05:05 UTC1h 25m
2026-04-15 TMT7CW - Apr 15, 21:05 UTCApr 15, 21:45 UTC40m
2026-04-15 TMT7CW - Apr 15, 20:20 UTCApr 15, 21:00 UTC40m
2026-04-15 TMT6RU - Apr 15, 03:35 UTCApr 15, 04:50 UTC1h 15m
2026-04-14 TMT7CW - Apr 14, 20:55 UTCApr 14, 21:50 UTC55m

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

Mode-S 4520EA frequently asked

What is Mode-S code 4520EA?
4520EA is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-CXA.
Where is Mode-S 4520EA registered?
Mode-S code 4520EA is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4520EA broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4520EA, octal 21220352, decimal 4,530,410.
What flights does 4520EA operate?
Mode-S 4520EA has broadcast 13 distinct callsigns, including ADZ4193, ADZ4093, TMT7CW, TMT6RU, ADZ94Q.