Apparatus

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sensors Mode-S transponder

4520CF

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to LZ-FBH · AIRBUS A-320

Hex
4520CF
Octal
21220317
Decimal
4,530,383
Country
BG
Tail
LZ-FBH
Type
A320
No current signal · last broadcast Jul 26, 15:10 UTC
Flights observed
325
Distinct callsigns
20
Country
BG
Last broadcast
Jul 26, 15:10 UTC

Last known position

Most recent position reported by Mode-S 4520CF.

Country allocation

The ICAO 24-bit address 4520CF 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
LZB7710 Bulgaria Air 14 2026-07-24
LZB7709 Bulgaria Air 14 2026-07-24
LZB8844 - 10 2026-07-26
LZB8843 - 10 2026-07-26
LZB8453 Bulgaria Air 6 2026-07-21
LZB6824 - 6 2026-07-05
LZB6823 Bulgaria Air 6 2026-07-05
BVL5360 - 6 2026-06-30
BGH3024 - 6 2026-06-28
BGH3023 - 6 2026-06-28
LZB976 Bulgaria Air 5 2026-06-01
LZB975 Bulgaria Air 5 2026-06-01
LZB8292 - 5 2026-04-24
LZB8291 - 5 2026-04-24
LZB572 Bulgaria Air 5 2026-07-23
LZB571 Bulgaria Air 5 2026-07-23
BVL7053 - 5 2026-07-06
BVL6224 - 5 2026-07-21
BVL6220 - 5 2026-06-27
BVL5359 - 5 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 LZB8844 - Jul 26, 13:45 UTCJul 26, 15:10 UTC1h 25m
2026-07-26 LZB8843 - Jul 26, 10:55 UTCJul 26, 12:25 UTC1h 30m
2026-07-26 LZB8842 - Jul 26, 07:45 UTCJul 26, 09:05 UTC1h 20m
2026-07-26 LZB8841 SOF → AYT Jul 26, 05:10 UTCJul 26, 06:20 UTC1h 10m
2026-07-25 LZB8794 BJV → SOF Jul 25, 13:05 UTCJul 25, 14:15 UTC1h 10m
2026-07-25 LZB8793 SOF → BJV Jul 25, 11:00 UTCJul 25, 12:05 UTC1h 5m
2026-07-25 LZB1111 BRU → ALC Jul 25, 06:15 UTCJul 25, 07:55 UTC1h 40m
2026-07-24 LZB7710 NBE → SOF Jul 24, 14:15 UTCJul 24, 16:05 UTC1h 50m
2026-07-24 LZB7709 SOF → NBE Jul 24, 11:20 UTCJul 24, 13:20 UTC2h 0m
2026-07-24 LZB8844 - Jul 24, 07:40 UTCJul 24, 09:05 UTC1h 25m
2026-07-24 LZB8843 - Jul 24, 05:10 UTCJul 24, 06:25 UTC1h 15m
2026-07-24 BVL5790 - Jul 24, 01:25 UTCJul 24, 02:05 UTC40m
2026-07-23 BVL5790 - Jul 23, 23:45 UTCJul 24, 00:35 UTC50m
2026-07-23 BVL5789 - Jul 23, 21:15 UTCJul 23, 22:10 UTC55m
2026-07-23 LZB572 TLV → SOF Jul 23, 17:15 UTCJul 23, 19:30 UTC2h 15m
2026-07-23 LZB571 SOF → TLV Jul 23, 13:25 UTCJul 23, 15:20 UTC1h 55m
2026-07-22 LZB7856 DJE → SOF Jul 22, 17:50 UTCJul 22, 19:30 UTC1h 40m
2026-07-22 LZB7855 SOF → DJE Jul 22, 14:45 UTCJul 22, 15:10 UTC25m
2026-07-22 LZB7855 SOF → DJE Jul 22, 11:45 UTCJul 22, 13:35 UTC1h 50m
2026-07-22 BVL5788 - Jul 22, 11:15 UTCJul 22, 11:30 UTC15m
2026-07-21 BVL6224 - Jul 21, 20:50 UTCJul 21, 21:50 UTC1h 0m
2026-07-21 BVL6223 - Jul 21, 18:40 UTCJul 21, 19:55 UTC1h 15m
2026-07-21 BVL6218 - Jul 21, 16:00 UTCJul 21, 17:20 UTC1h 20m
2026-07-21 BVL6217 - Jul 21, 13:50 UTCJul 21, 15:05 UTC1h 15m
2026-07-21 LZB8454 EVN → BOJ Jul 21, 10:45 UTCJul 21, 11:35 UTC50m
2026-07-21 LZB8453 SOF → BOJ Jul 21, 07:35 UTCJul 21, 08:00 UTC25m
2026-07-21 LZB8453 SOF → BOJ Jul 21, 05:50 UTCJul 21, 06:25 UTC35m
2026-07-21 LZB572 TLV → SOF Jul 21, 02:30 UTCJul 21, 04:35 UTC2h 5m
2026-07-20 LZB571 SOF → TLV Jul 20, 21:20 UTCJul 20, 23:25 UTC2h 5m
2026-07-20 LZB572 TLV → SOF Jul 20, 02:30 UTCJul 20, 04:40 UTC2h 10m
2026-07-19 LZB571 SOF → TLV Jul 19, 22:15 UTCJul 20, 00:10 UTC1h 55m
2026-07-19 LZB8844 - Jul 19, 13:40 UTCJul 19, 15:10 UTC1h 30m
2026-07-19 LZB8843 - Jul 19, 10:45 UTCJul 19, 12:15 UTC1h 30m
2026-07-19 LZB8842 - Jul 19, 07:40 UTCJul 19, 09:00 UTC1h 20m
2026-07-19 LZB8841 SOF → AYT Jul 19, 05:05 UTCJul 19, 06:25 UTC1h 20m
2026-07-18 LZB8794 BJV → SOF Jul 18, 14:00 UTCJul 18, 15:05 UTC1h 5m
2026-07-18 LZB8793 SOF → BJV Jul 18, 11:55 UTCJul 18, 12:55 UTC1h 0m
2026-07-17 LZB7710 NBE → SOF Jul 17, 14:35 UTCJul 17, 16:15 UTC1h 40m
2026-07-17 LZB7709 SOF → NBE Jul 17, 11:25 UTCJul 17, 13:20 UTC1h 55m
2026-07-17 LZB8844 - Jul 17, 07:35 UTCJul 17, 09:10 UTC1h 35m
2026-07-17 LZB8843 - Jul 17, 04:44 UTCJul 17, 06:05 UTC1h 20m
2026-07-16 LZB572 TLV → SOF Jul 16, 18:50 UTCJul 16, 21:00 UTC2h 10m
2026-07-16 LZB571 - Jul 16, 14:50 UTCJul 16, 17:00 UTC2h 10m
2026-07-15 LZB7822 NBE → SOF Jul 15, 14:15 UTCJul 15, 16:05 UTC1h 50m
2026-07-15 LZB7821 - Jul 15, 12:55 UTCJul 15, 13:20 UTC25m
2026-07-15 LZB7821 - Jul 15, 09:55 UTCJul 15, 11:50 UTC1h 55m
2026-07-14 BVL6224 - Jul 14, 22:30 UTCJul 14, 22:50 UTC19m
2026-07-14 BVL6224 - Jul 14, 20:10 UTCJul 14, 21:40 UTC1h 30m
2026-07-14 BVL6223 - Jul 14, 17:25 UTCJul 14, 18:35 UTC1h 10m
2026-07-14 BVL6218 - Jul 14, 15:15 UTCJul 14, 16:25 UTC1h 10m

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

Mode-S 4520CF frequently asked

What is Mode-S code 4520CF?
4520CF is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to LZ-FBH.
Where is Mode-S 4520CF registered?
Mode-S code 4520CF is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4520CF broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 15:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4520CF, octal 21220317, decimal 4,530,383.
What flights does 4520CF operate?
Mode-S 4520CF has broadcast 20 distinct callsigns, including LZB7710, LZB7709, LZB8844, LZB8843, LZB8453.