Apparatus

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sensors Mode-S transponder

4D21BE

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-OJP · BOMBARDIER BD-700 Global 6000/6500

Hex
4D21BE
Octal
23220676
Decimal
5,054,910
Country
MT
Tail
9H-OJP
Type
GLEX
No current signal · last broadcast 7d ago
Flights observed
84
Distinct callsigns
5
Country
MT
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S 4D21BE.

Country allocation

The ICAO 24-bit address 4D21BE falls within the block assigned to Malta (MT) by ICAO Annex 10, Volume III. Every aircraft registered in Malta 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 5 distinct

Callsign Airline Flights Last seen
BRD7142 - 29 2026-07-24
BRD7141 - 27 2026-07-24
BRD7438 - 14 2026-07-24
BRD7439 - 13 2026-07-24
BRD999P - 1 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 BRD7142 MLA → FCO Jul 24, 16:40 UTCJul 24, 17:55 UTC1h 15m
2026-07-24 BRD7439 MJI → MLA Jul 24, 14:50 UTCJul 24, 15:30 UTC40m
2026-07-24 BRD7438 MLA → MJI Jul 24, 10:30 UTCJul 24, 11:05 UTC35m
2026-07-24 BRD7141 - Jul 24, 06:15 UTCJul 24, 07:20 UTC1h 5m
2026-07-23 BRD7142 - Jul 23, 15:45 UTCJul 23, 16:55 UTC1h 10m
2026-07-23 BRD7141 - Jul 23, 06:15 UTCJul 23, 07:15 UTC1h 0m
2026-07-22 BRD7142 - Jul 22, 16:00 UTCJul 22, 17:15 UTC1h 15m
2026-07-21 BRD7142 - Jul 21, 18:35 UTCJul 21, 19:45 UTC1h 10m
2026-07-21 BRD7439 - Jul 21, 17:00 UTCJul 21, 17:30 UTC30m
2026-07-21 BRD7438 MLA → MJI Jul 21, 12:35 UTCJul 21, 13:15 UTC40m
2026-07-21 BRD7141 - Jul 21, 06:20 UTCJul 21, 07:30 UTC1h 10m
2026-07-20 BRD7142 - Jul 20, 16:40 UTCJul 20, 17:55 UTC1h 15m
2026-07-20 BRD7141 FCO → MLA Jul 20, 08:50 UTCJul 20, 10:00 UTC1h 10m
2026-07-17 BRD7142 - Jul 17, 16:55 UTCJul 17, 18:05 UTC1h 10m
2026-07-17 BRD7439 - Jul 17, 15:25 UTCJul 17, 16:00 UTC35m
2026-07-17 BRD7438 - Jul 17, 11:15 UTCJul 17, 11:45 UTC30m
2026-07-17 BRD7141 - Jul 17, 06:15 UTCJul 17, 07:20 UTC1h 5m
2026-07-16 BRD7142 - Jul 16, 15:55 UTCJul 16, 17:05 UTC1h 10m
2026-07-16 BRD7141 - Jul 16, 06:25 UTCJul 16, 07:25 UTC1h 0m
2026-07-15 BRD7142 - Jul 15, 16:00 UTCJul 15, 17:15 UTC1h 15m
2026-07-15 BRD7141 - Jul 15, 06:55 UTCJul 15, 08:05 UTC1h 10m
2026-07-14 BRD7142 - Jul 14, 17:15 UTCJul 14, 18:30 UTC1h 15m
2026-07-14 BRD7439 - Jul 14, 15:40 UTCJul 14, 16:15 UTC35m
2026-07-14 BRD7438 MLA → MJI Jul 14, 11:55 UTCJul 14, 12:35 UTC40m
2026-07-14 BRD7141 - Jul 14, 06:30 UTCJul 14, 07:35 UTC1h 5m
2026-07-13 BRD7142 - Jul 13, 16:00 UTCJul 13, 17:15 UTC1h 15m
2026-07-13 BRD7141 FCO → MLA Jul 13, 06:15 UTCJul 13, 07:20 UTC1h 5m
2026-07-10 BRD7142 - Jul 10, 16:05 UTCJul 10, 17:20 UTC1h 15m
2026-07-10 BRD7439 MJI → MLA Jul 10, 14:35 UTCJul 10, 15:15 UTC40m
2026-07-10 BRD7438 MLA → MJI Jul 10, 11:05 UTCJul 10, 11:40 UTC35m
2026-07-10 BRD7141 - Jul 10, 06:00 UTCJul 10, 07:05 UTC1h 5m
2026-07-09 BRD7142 - Jul 9, 15:45 UTCJul 9, 16:55 UTC1h 10m
2026-07-09 BRD7141 - Jul 9, 07:15 UTCJul 9, 08:25 UTC1h 10m
2026-07-08 BRD7142 - Jul 8, 16:20 UTCJul 8, 17:30 UTC1h 10m
2026-07-08 BRD7141 - Jul 8, 06:10 UTCJul 8, 07:15 UTC1h 5m
2026-07-07 BRD7142 - Jul 7, 16:40 UTCJul 7, 17:50 UTC1h 10m
2026-07-07 BRD7439 MJI → MLA Jul 7, 15:00 UTCJul 7, 15:40 UTC40m
2026-07-07 BRD7438 MLA → MJI Jul 7, 11:10 UTCJul 7, 11:55 UTC45m
2026-07-07 BRD7141 - Jul 7, 06:55 UTCJul 7, 08:10 UTC1h 15m
2026-07-06 BRD7142 - Jul 6, 16:10 UTCJul 6, 17:35 UTC1h 25m
2026-07-06 BRD7141 - Jul 6, 06:20 UTCJul 6, 07:20 UTC1h 0m
2026-07-03 BRD7142 MLA → FCO Jul 3, 16:10 UTCJul 3, 17:20 UTC1h 10m
2026-07-03 BRD7439 - Jul 3, 14:35 UTCJul 3, 15:05 UTC30m
2026-07-03 BRD7438 - Jul 3, 10:45 UTCJul 3, 11:10 UTC25m
2026-07-03 BRD7141 - Jul 3, 06:30 UTCJul 3, 07:35 UTC1h 5m
2026-07-02 BRD7142 - Jul 2, 15:55 UTCJul 2, 17:05 UTC1h 10m
2026-07-02 BRD7141 FCO → MLA Jul 2, 07:15 UTCJul 2, 08:25 UTC1h 10m
2026-07-01 BRD7142 - Jul 1, 16:00 UTCJul 1, 17:10 UTC1h 10m
2026-07-01 BRD7141 - Jul 1, 06:30 UTCJul 1, 07:35 UTC1h 5m
2026-06-30 BRD7142 - Jun 30, 16:35 UTCJun 30, 17:50 UTC1h 15m

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 9H-OJP page for operator, model, and routing details .

Mode-S 4D21BE frequently asked

What is Mode-S code 4D21BE?
4D21BE is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-OJP.
Where is Mode-S 4D21BE registered?
Mode-S code 4D21BE is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D21BE broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D21BE, octal 23220676, decimal 5,054,910.
What flights does 4D21BE operate?
Mode-S 4D21BE has broadcast 5 distinct callsigns, including BRD7142, BRD7141, BRD7438, BRD7439, BRD999P.