Apparatus

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sensors Mode-S transponder

4520D4

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-JET · EMBRAER EMB-505 Phenom 300

Hex
4520D4
Octal
21220324
Decimal
4,530,388
Country
BG
Tail
LZ-JET
Type
E55P
Broadcasting now · callsign EGT450 · 45,000 ft
Flights observed
132
Distinct callsigns
20
Country
BG
Last broadcast
Jul 25, 10:35 UTC

Current position

4520D4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4520D4 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
EGT307 - 5 2026-07-01
EGT160 - 5 2026-04-13
LZJET - 4 2026-06-16
EGT196 - 4 2026-05-10
EGT194 - 4 2026-05-08
EGT187 - 4 2026-05-31
EGT182 - 4 2026-04-26
EGT382 - 3 2026-07-20
EGT381 - 3 2026-07-21
EGT357 - 3 2026-07-06
EGT334 - 3 2026-07-12
EGT326 - 3 2026-07-04
EGT296 - 3 2026-06-18
EGT268 - 3 2026-06-07
EGT263 - 3 2026-05-23
EGT240 - 3 2026-05-28
EGT228 - 3 2026-05-09
EGT208 - 3 2026-04-24
EGT384 - 2 2026-07-18
EGT366 - 2 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 EGT366 NCE → SOF Jul 25, 08:45 UTCJul 25, 10:30 UTC1h 45m
2026-07-25 EGT366 - Jul 25, 05:30 UTCJul 25, 06:05 UTC35m
2026-07-24 EGT403 - Jul 24, 08:15 UTCJul 24, 10:05 UTC1h 50m
2026-07-21 EGT381 - Jul 21, 14:45 UTCJul 21, 16:25 UTC1h 40m
2026-07-21 EGT381 - Jul 21, 11:40 UTCJul 21, 13:35 UTC1h 55m
2026-07-20 EGT382 - Jul 20, 16:35 UTCJul 20, 16:55 UTC20m
2026-07-20 EGT382 - Jul 20, 13:50 UTCJul 20, 15:40 UTC1h 50m
2026-07-20 EGT382 - Jul 20, 10:05 UTCJul 20, 12:20 UTC2h 15m
2026-07-19 EGT381 - Jul 19, 12:10 UTCJul 19, 13:50 UTC1h 40m
2026-07-18 EGT384 - Jul 18, 15:25 UTCJul 18, 16:10 UTC45m
2026-07-18 EGT384 SOF → CEQ Jul 18, 11:40 UTCJul 18, 14:05 UTC2h 25m
2026-07-14 EGT249 - Jul 14, 14:45 UTCJul 14, 17:40 UTC2h 55m
2026-07-13 EGT249 SOF → EXT Jul 13, 09:15 UTCJul 13, 12:35 UTC3h 20m
2026-07-12 EGT334 - Jul 12, 14:10 UTCJul 12, 14:55 UTC45m
2026-07-12 EGT257 - Jul 12, 11:20 UTCJul 12, 12:35 UTC1h 15m
2026-07-09 EGT257 - Jul 9, 17:05 UTCJul 9, 17:45 UTC40m
2026-07-09 EGT351 - Jul 9, 13:25 UTCJul 9, 14:25 UTC1h 0m
2026-07-08 EGT334 - Jul 8, 11:35 UTCJul 8, 12:15 UTC40m
2026-07-08 EGT334 SOF → ATH Jul 8, 09:10 UTCJul 8, 10:10 UTC1h 0m
2026-07-06 EGT357 - Jul 6, 11:30 UTCJul 6, 12:25 UTC55m
2026-07-06 EGT357 - Jul 6, 08:25 UTCJul 6, 10:30 UTC2h 5m
2026-07-06 EGT357 SOF → PSA Jul 6, 05:15 UTCJul 6, 06:55 UTC1h 40m
2026-07-04 EGT326 SKG → SOF Jul 4, 16:10 UTCJul 4, 16:45 UTC35m
2026-07-04 EGT326 - Jul 4, 13:25 UTCJul 4, 15:15 UTC1h 50m
2026-07-02 EGT326 - Jul 2, 17:50 UTCJul 2, 19:55 UTC2h 5m
2026-07-02 EGT345 - Jul 2, 15:40 UTCJul 2, 16:50 UTC1h 10m
2026-07-02 EGT345 SOF → JMK Jul 2, 13:00 UTCJul 2, 14:00 UTC1h 0m
2026-07-01 EGT219 - Jul 1, 08:45 UTCJul 1, 09:50 UTC1h 5m
2026-07-01 EGT219 - Jul 1, 06:55 UTCJul 1, 07:50 UTC55m
2026-07-01 EGT307 MLA → SKG Jul 1, 03:30 UTCJul 1, 04:50 UTC1h 20m
2026-06-29 EGT307 OLB → MLA Jun 29, 13:24 UTCJun 29, 14:34 UTC1h 10m
2026-06-29 EGT324 - Jun 29, 11:14 UTCJun 29, 12:00 UTC45m
2026-06-28 EGT324 - Jun 28, 05:49 UTCJun 28, 16:19 UTC10h 30m
2026-06-27 EGT297 NCE → IBZ Jun 27, 13:24 UTCJun 27, 14:35 UTC1h 10m
2026-06-27 EGT293 - Jun 27, 10:10 UTCJun 27, 10:54 UTC45m
2026-06-26 EGT307 - Jun 26, 11:14 UTCJun 26, 12:19 UTC1h 5m
2026-06-26 EGT307 MLA → OLB Jun 26, 08:45 UTCJun 26, 09:55 UTC1h 10m
2026-06-26 EGT307 NCE → MLA Jun 26, 06:00 UTCJun 26, 07:35 UTC1h 35m
2026-06-22 EGT287 - Jun 22, 08:29 UTCJun 22, 10:30 UTC2h 0m
2026-06-21 EGT311 - Jun 21, 09:24 UTCJun 21, 10:54 UTC1h 30m
2026-06-21 EGT311 - Jun 21, 06:14 UTCJun 21, 07:59 UTC1h 45m
2026-06-19 EGT286 SKG → SOF Jun 19, 15:19 UTCJun 19, 15:54 UTC35m
2026-06-19 EGT286 SOF → SKG Jun 19, 13:50 UTCJun 19, 14:19 UTC30m
2026-06-18 EGT296 - Jun 18, 16:10 UTCJun 18, 16:45 UTC35m
2026-06-18 EGT296 - Jun 18, 12:50 UTCJun 18, 15:15 UTC2h 25m
2026-06-17 EGT296 - Jun 17, 12:50 UTCJun 17, 14:20 UTC1h 30m
2026-06-17 EGT230 - Jun 17, 10:35 UTCJun 17, 11:25 UTC50m
2026-06-16 LZJET - Jun 16, 16:45 UTCJun 16, 18:35 UTC1h 50m
2026-06-12 LZJET - Jun 12, 08:30 UTCJun 12, 11:45 UTC3h 15m
2026-06-10 EGT234 - Jun 10, 07:25 UTCJun 10, 08:30 UTC1h 5m

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

Mode-S 4520D4 frequently asked

What is Mode-S code 4520D4?
4520D4 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-JET.
Where is Mode-S 4520D4 registered?
Mode-S code 4520D4 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4520D4 broadcasting right now?
Yes. Mode-S 4520D4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4520D4, octal 21220324, decimal 4,530,388.
What flights does 4520D4 operate?
Mode-S 4520D4 has broadcast 20 distinct callsigns, including EGT307, EGT160, LZJET, EGT196, EGT194.