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 Jul 26, 22:10 UTC
Flights observed
243
Distinct callsigns
16
Country
BG
Last broadcast
Jul 26, 22:10 UTC

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 16 distinct

Callsign Airline Flights Last seen
ADZ4193 - 129 2026-07-24
ADZ4093 - 92 2026-07-26
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
ADZ4992 - 1 2026-07-06
ADZ4991 - 1 2026-07-06
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
AADZ4093 - 1 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ADZ4093 - Jul 26, 20:55 UTCJul 26, 22:10 UTC1h 15m
2026-07-26 ADZ4093 - Jul 26, 16:35 UTCJul 26, 19:25 UTC2h 50m
2026-07-24 ADZ4193 - Jul 24, 18:30 UTCJul 24, 21:50 UTC3h 20m
2026-07-24 ADZ4193 - Jul 24, 16:00 UTCJul 24, 17:30 UTC1h 30m
2026-07-24 ADZ4093 - Jul 24, 07:10 UTCJul 24, 08:25 UTC1h 15m
2026-07-24 ADZ4093 - Jul 24, 03:20 UTCJul 24, 05:55 UTC2h 35m
2026-07-23 ADZ4193 NUE → CDG Jul 23, 21:35 UTCJul 23, 22:45 UTC1h 10m
2026-07-23 ADZ4193 ATH → NUE Jul 23, 17:50 UTCJul 23, 20:15 UTC2h 25m
2026-07-23 ADZ4193 - Jul 23, 15:25 UTCJul 23, 16:50 UTC1h 25m
2026-07-23 ADZ4093 - Jul 23, 06:40 UTCJul 23, 07:55 UTC1h 15m
2026-07-23 ADZ4093 - Jul 23, 02:45 UTCJul 23, 05:15 UTC2h 30m
2026-07-22 ADZ4193 ATH → CDG Jul 22, 19:40 UTCJul 22, 23:00 UTC3h 20m
2026-07-22 ADZ4193 - Jul 22, 16:00 UTCJul 22, 17:35 UTC1h 35m
2026-07-22 ADZ4093 CDG → ATH Jul 22, 02:50 UTCJul 22, 05:25 UTC2h 35m
2026-07-21 ADZ4193 - Jul 21, 22:10 UTCJul 21, 23:20 UTC1h 10m
2026-07-21 ADZ4193 ATH → NUE Jul 21, 18:20 UTCJul 21, 21:05 UTC2h 45m
2026-07-21 ADZ4193 LCA → ATH Jul 21, 15:40 UTCJul 21, 17:15 UTC1h 35m
2026-07-21 ADZ4093 - Jul 21, 06:40 UTCJul 21, 07:55 UTC1h 15m
2026-07-21 ADZ4093 CDG → ATH Jul 21, 02:55 UTCJul 21, 05:35 UTC2h 40m
2026-07-17 ADZ4193 NUE → CDG Jul 17, 21:34 UTCJul 17, 22:45 UTC1h 10m
2026-07-17 ADZ4193 ATH → NUE Jul 17, 18:00 UTCJul 17, 20:40 UTC2h 40m
2026-07-17 ADZ4193 - Jul 17, 15:40 UTCJul 17, 17:05 UTC1h 25m
2026-07-17 ADZ4093 - Jul 17, 07:44 UTCJul 17, 08:59 UTC1h 15m
2026-07-17 ADZ4093 CDG → ATH Jul 17, 03:30 UTCJul 17, 06:15 UTC2h 45m
2026-07-16 ADZ4193 NUE → CDG Jul 16, 22:10 UTCJul 16, 23:15 UTC1h 5m
2026-07-16 ADZ4193 - Jul 16, 18:19 UTCJul 16, 20:55 UTC2h 35m
2026-07-16 ADZ4193 LCA → ATH Jul 16, 15:35 UTCJul 16, 17:00 UTC1h 25m
2026-07-16 ADZ4093 - Jul 16, 06:45 UTCJul 16, 08:00 UTC1h 15m
2026-07-16 ADZ4093 CDG → ATH Jul 16, 02:55 UTCJul 16, 05:30 UTC2h 35m
2026-07-15 ADZ4193 ATH → CDG Jul 15, 18:00 UTCJul 15, 21:15 UTC3h 15m
2026-07-15 ADZ4193 - Jul 15, 15:50 UTCJul 15, 16:50 UTC1h 0m
2026-07-15 ADZ4193 - Jul 15, 15:15 UTCJul 15, 15:45 UTC30m
2026-07-15 ADZ4093 ATH → LCA Jul 15, 07:00 UTCJul 15, 08:20 UTC1h 20m
2026-07-15 ADZ4093 - Jul 15, 02:50 UTCJul 15, 05:20 UTC2h 30m
2026-07-14 ADZ4193 NUE → CDG Jul 14, 22:00 UTCJul 14, 23:15 UTC1h 14m
2026-07-14 ADZ4193 ATH → NUE Jul 14, 18:05 UTCJul 14, 20:45 UTC2h 40m
2026-07-14 ADZ4193 - Jul 14, 15:10 UTCJul 14, 16:45 UTC1h 35m
2026-07-14 ADZ4093 - Jul 14, 06:40 UTCJul 14, 07:55 UTC1h 15m
2026-07-14 ADZ4093 - Jul 14, 02:40 UTCJul 14, 05:15 UTC2h 35m
2026-07-13 ADZ4193 NUE → CDG Jul 13, 22:30 UTCJul 13, 23:40 UTC1h 10m
2026-07-13 ADZ4193 ATH → NUE Jul 13, 18:35 UTCJul 13, 21:15 UTC2h 40m
2026-07-13 ADZ4193 LCA → ATH Jul 13, 15:55 UTCJul 13, 17:30 UTC1h 35m
2026-07-12 ADZ4093 - Jul 12, 20:15 UTCJul 12, 21:30 UTC1h 15m
2026-07-12 ADZ4093 - Jul 12, 16:30 UTCJul 12, 19:10 UTC2h 40m
2026-07-10 ADZ4193 - Jul 10, 21:55 UTCJul 10, 23:05 UTC1h 10m
2026-07-10 ADZ4193 ATH → NUE Jul 10, 18:10 UTCJul 10, 20:35 UTC2h 25m
2026-07-10 ADZ4193 - Jul 10, 15:30 UTCJul 10, 17:05 UTC1h 35m
2026-07-10 ADZ4093 - Jul 10, 06:50 UTCJul 10, 08:10 UTC1h 20m
2026-07-10 ADZ4093 - Jul 10, 02:50 UTCJul 10, 05:45 UTC2h 55m
2026-07-09 ADZ4193 NUE → CDG Jul 9, 23:10 UTCJul 10, 00:10 UTC1h 0m

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 Jul 26, 22:10 UTC.
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 16 distinct callsigns, including ADZ4193, ADZ4093, TMT7CW, TMT6RU, ADZ94Q.