Apparatus

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sensors Mode-S transponder

457C23

ICAO 24-bit transponder address · allocated to Bulgaria

Currently assigned to 602 · ZLIN Z-42/142/242

Hex
457C23
Octal
21276043
Decimal
4,553,763
Country
BG
Tail
602
Type
Z42
No current signal · last broadcast 3d ago
Flights observed
87
Distinct callsigns
1
Country
BG
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 457C23.

Country allocation

The ICAO 24-bit address 457C23 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 1 distinct

Callsign Airline Flights Last seen
AFB602 - 87 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 AFB602 - Jul 24, 08:05 UTCJul 24, 08:25 UTC20m
2026-07-24 AFB602 - Jul 24, 06:00 UTCJul 24, 06:20 UTC20m
2026-07-24 AFB602 - Jul 24, 05:10 UTCJul 24, 05:30 UTC20m
2026-07-24 AFB602 - Jul 24, 04:10 UTCJul 24, 04:30 UTC20m
2026-07-23 AFB602 - Jul 23, 10:05 UTCJul 23, 10:25 UTC20m
2026-07-23 AFB602 - Jul 23, 08:45 UTCJul 23, 09:05 UTC20m
2026-07-23 AFB602 - Jul 23, 06:30 UTCJul 23, 06:40 UTC10m
2026-07-23 AFB602 - Jul 23, 05:20 UTCJul 23, 05:45 UTC25m
2026-07-23 AFB602 - Jul 23, 04:05 UTCJul 23, 04:30 UTC25m
2026-07-21 AFB602 - Jul 21, 07:35 UTCJul 21, 08:00 UTC25m
2026-07-21 AFB602 - Jul 21, 06:30 UTCJul 21, 06:50 UTC20m
2026-07-21 AFB602 - Jul 21, 05:25 UTCJul 21, 05:35 UTC10m
2026-07-21 AFB602 - Jul 21, 04:10 UTCJul 21, 04:30 UTC20m
2026-07-17 AFB602 - Jul 17, 04:04 UTCJul 17, 06:29 UTC2h 25m
2026-07-16 AFB602 - Jul 16, 09:20 UTCJul 16, 09:40 UTC20m
2026-07-16 AFB602 - Jul 16, 08:15 UTCJul 16, 08:40 UTC25m
2026-07-16 AFB602 - Jul 16, 07:15 UTCJul 16, 07:35 UTC20m
2026-07-16 AFB602 - Jul 16, 05:10 UTCJul 16, 06:40 UTC1h 30m
2026-07-16 AFB602 - Jul 16, 04:10 UTCJul 16, 04:40 UTC30m
2026-07-15 AFB602 - Jul 15, 09:45 UTCJul 15, 09:55 UTC10m
2026-07-15 AFB602 - Jul 15, 07:35 UTCJul 15, 07:50 UTC15m
2026-07-15 AFB602 - Jul 15, 06:30 UTCJul 15, 06:55 UTC25m
2026-07-15 AFB602 - Jul 15, 04:05 UTCJul 15, 05:50 UTC1h 45m
2026-07-14 AFB602 - Jul 14, 09:40 UTCJul 14, 10:00 UTC20m
2026-07-14 AFB602 - Jul 14, 08:35 UTCJul 14, 09:00 UTC25m
2026-07-14 AFB602 - Jul 14, 07:30 UTCJul 14, 07:55 UTC25m
2026-07-14 AFB602 - Jul 14, 06:20 UTCJul 14, 06:50 UTC30m
2026-07-14 AFB602 - Jul 14, 04:05 UTCJul 14, 05:30 UTC1h 25m
2026-07-08 AFB602 - Jul 8, 05:35 UTCJul 8, 05:45 UTC10m
2026-07-08 AFB602 - Jul 8, 04:15 UTCJul 8, 04:40 UTC25m
2026-07-07 AFB602 - Jul 7, 07:45 UTCJul 7, 08:10 UTC25m
2026-07-07 AFB602 - Jul 7, 06:35 UTCJul 7, 07:00 UTC25m
2026-07-07 AFB602 - Jul 7, 05:25 UTCJul 7, 05:55 UTC30m
2026-07-07 AFB602 - Jul 7, 04:10 UTCJul 7, 04:45 UTC35m
2026-07-01 AFB602 - Jul 1, 06:55 UTCJul 1, 07:10 UTC15m
2026-06-17 AFB602 - Jun 17, 05:45 UTCJun 17, 06:15 UTC30m
2026-06-16 AFB602 - Jun 16, 05:45 UTCJun 16, 05:55 UTC10m
2026-06-11 AFB602 - Jun 11, 15:35 UTCJun 11, 15:45 UTC10m
2026-06-11 AFB602 - Jun 11, 09:50 UTCJun 11, 10:00 UTC10m
2026-06-11 AFB602 - Jun 11, 09:00 UTCJun 11, 09:10 UTC10m
2026-06-11 AFB602 - Jun 11, 07:55 UTCJun 11, 08:20 UTC25m
2026-06-11 AFB602 - Jun 11, 06:55 UTCJun 11, 07:15 UTC20m
2026-06-11 AFB602 - Jun 11, 05:45 UTCJun 11, 06:05 UTC20m
2026-06-10 AFB602 - Jun 10, 16:25 UTCJun 10, 16:40 UTC15m
2026-06-10 AFB602 - Jun 10, 15:15 UTCJun 10, 15:35 UTC20m
2026-06-10 AFB602 - Jun 10, 11:25 UTCJun 10, 11:35 UTC10m
2026-06-10 AFB602 - Jun 10, 09:25 UTCJun 10, 09:35 UTC10m
2026-06-05 AFB602 - Jun 5, 12:10 UTCJun 5, 12:30 UTC20m
2026-06-05 AFB602 - Jun 5, 08:45 UTCJun 5, 09:00 UTC15m
2026-06-05 AFB602 - Jun 5, 07:35 UTCJun 5, 07:50 UTC15m

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 602 page for operator, model, and routing details .

Mode-S 457C23 frequently asked

What is Mode-S code 457C23?
457C23 is an ICAO 24-bit transponder address. Allocated to Bulgaria. Assigned to 602.
Where is Mode-S 457C23 registered?
Mode-S code 457C23 is allocated to Bulgaria (BG). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 457C23 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 457C23, octal 21276043, decimal 4,553,763.
What flights does 457C23 operate?
Mode-S 457C23 has broadcast 1 distinct callsign, including AFB602.