Apparatus

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sensors Mode-S transponder

4D23E1

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-CAD · BOEING 767-300

Hex
4D23E1
Octal
23221741
Decimal
5,055,457
Country
MT
Tail
9H-CAD
Type
B763
No current signal · last broadcast 17h ago
Flights observed
93
Distinct callsigns
20
Country
MT
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 4D23E1.

Country allocation

The ICAO 24-bit address 4D23E1 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 20 distinct

Callsign Airline Flights Last seen
CHZ2255 - 12 2026-05-29
CHZ2256 - 11 2026-05-30
ICL604 CAL Cargo Air Lines 10 2026-05-29
CHZ212 - 9 2026-05-25
CHZ211 - 6 2026-05-14
ICL853 CAL Cargo Air Lines 4 2026-05-26
CHZ610 - 4 2026-06-01
ICL605 CAL Cargo Air Lines 3 2026-05-28
ICL601 CAL Cargo Air Lines 3 2026-05-30
CHZ606 - 3 2026-04-30
CHZ112 - 3 2026-06-02
CHZ111 - 3 2026-06-01
ICL608 CAL Cargo Air Lines 2 2026-05-27
ICL607 CAL Cargo Air Lines 2 2026-04-24
ICL606 CAL Cargo Air Lines 2 2026-04-27
ICL602 CAL Cargo Air Lines 2 2026-04-22
CHZ603 - 2 2026-05-15
CHZ312 - 2 2026-05-09
CHZ311 - 2 2026-05-09
ICL812 CAL Cargo Air Lines 1 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 CHZ112 CGN → TLV Jun 2, 02:50 UTCJun 2, 06:35 UTC3h 45m
2026-06-01 CHZ111 TLV → CGN Jun 1, 20:40 UTCJun 2, 00:50 UTC4h 10m
2026-06-01 CHZ610 MXP → TLV Jun 1, 15:10 UTCJun 1, 18:25 UTC3h 15m
2026-05-31 CHZ610 LGG → MXP May 31, 17:10 UTCMay 31, 18:20 UTC1h 10m
2026-05-30 ICL601 TLV → LGG May 30, 17:05 UTCMay 30, 21:25 UTC4h 20m
2026-05-30 CHZ2256 - May 30, 13:10 UTCMay 30, 13:50 UTC40m
2026-05-30 CHZ2256 - May 30, 02:35 UTCMay 30, 09:00 UTC6h 25m
2026-05-29 CHZ2255 - May 29, 17:20 UTCMay 29, 23:40 UTC6h 20m
2026-05-29 ICL604 ZAZ → TLV May 29, 06:55 UTCMay 29, 07:30 UTC35m
2026-05-29 ICL604 ZAZ → TLV May 29, 00:00 UTCMay 29, 03:50 UTC3h 50m
2026-05-28 ICL605 TLV → LGG May 28, 16:50 UTCMay 28, 21:05 UTC4h 15m
2026-05-28 CHZ2256 - May 28, 13:20 UTCMay 28, 14:00 UTC40m
2026-05-28 CHZ2256 - May 28, 03:00 UTCMay 28, 09:10 UTC6h 10m
2026-05-27 CHZ2255 - May 27, 17:25 UTCMay 27, 23:45 UTC6h 20m
2026-05-27 CHZ2255 - May 27, 13:50 UTCMay 27, 14:25 UTC35m
2026-05-27 ICL608 LGG → PRG May 27, 07:05 UTCMay 27, 11:15 UTC4h 10m
2026-05-26 ICL853 MST → LGG May 26, 15:00 UTCMay 26, 19:10 UTC4h 10m
2026-05-26 CHZ2256 - May 26, 11:20 UTCMay 26, 12:10 UTC50m
2026-05-26 CHZ2256 - May 26, 03:09 UTCMay 26, 09:19 UTC6h 10m
2026-05-25 CHZ2255 - May 25, 17:40 UTCMay 26, 00:04 UTC6h 24m
2026-05-25 CHZ212 - May 25, 14:30 UTCMay 25, 14:55 UTC25m
2026-05-25 CHZ212 - May 25, 08:50 UTCMay 25, 12:55 UTC4h 5m
2026-05-25 CHZ212 - May 25, 06:05 UTCMay 25, 06:30 UTC25m
2026-05-17 ICL609 TLV → LGG May 17, 21:15 UTCMay 18, 01:40 UTC4h 25m
2026-05-17 CHZ610 MXP → TLV May 17, 16:01 UTCMay 17, 19:10 UTC3h 10m
2026-05-17 CHZ610 - May 17, 12:05 UTCMay 17, 13:15 UTC1h 10m
2026-05-16 ICL623 - May 16, 23:25 UTCMay 17, 04:00 UTC4h 35m
2026-05-16 ICL622 LGG → TLV May 16, 17:45 UTCMay 16, 21:20 UTC3h 35m
2026-05-15 CHZ603 - May 15, 03:50 UTCMay 15, 08:30 UTC4h 40m
2026-05-14 CHZ212 CGN → TLV May 14, 22:20 UTCMay 15, 01:50 UTC3h 30m
2026-05-14 CHZ211 TLV → CGN May 14, 04:15 UTCMay 14, 08:35 UTC4h 20m
2026-05-13 CHZ212 CGN → TLV May 13, 21:45 UTCMay 14, 01:30 UTC3h 45m
2026-05-13 CHZ211 TLV → CGN May 13, 04:20 UTCMay 13, 08:50 UTC4h 30m
2026-05-12 CHZ212 CGN → TLV May 12, 22:01 UTCMay 13, 01:30 UTC3h 30m
2026-05-12 CHZ211 TLV → CGN May 12, 06:35 UTCMay 12, 11:00 UTC4h 25m
2026-05-12 CHZ112 - May 12, 02:45 UTCMay 12, 04:20 UTC1h 35m
2026-05-11 CHZ111 TLV → CGN May 11, 12:55 UTCMay 11, 17:15 UTC4h 21m
2026-05-11 ICL608 LGG → PRG May 11, 05:20 UTCMay 11, 09:10 UTC3h 50m
2026-05-10 ICL601 TLV → LGG May 10, 18:29 UTCMay 10, 22:49 UTC4h 20m
2026-05-10 ICL672 TLV → OSL May 10, 11:35 UTCMay 10, 16:10 UTC4h 35m
2026-05-10 ICL671 TLV → OSL May 10, 03:10 UTCMay 10, 08:00 UTC4h 50m
2026-05-09 CHZ312 CDG → TLV May 9, 20:49 UTCMay 10, 00:45 UTC3h 55m
2026-05-09 CHZ311 TLV → CDG May 9, 12:20 UTCMay 9, 17:10 UTC4h 50m
2026-05-09 ICL604 ZAZ → TLV May 9, 06:35 UTCMay 9, 10:25 UTC3h 50m
2026-05-08 CHZ601 - May 8, 04:09 UTCMay 8, 08:40 UTC4h 30m
2026-05-07 CHZ212 CGN → TLV May 7, 21:45 UTCMay 8, 01:19 UTC3h 35m
2026-05-07 CHZ211 TLV → CGN May 7, 06:10 UTCMay 7, 10:20 UTC4h 10m
2026-05-06 CHZ212 CGN → TLV May 6, 23:20 UTCMay 7, 03:15 UTC3h 55m
2026-05-06 CHZ211 TLV → CGN May 6, 08:10 UTCMay 6, 12:25 UTC4h 15m
2026-05-06 CHZ212 CGN → TLV May 6, 01:35 UTCMay 6, 05:20 UTC3h 45m

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

Mode-S 4D23E1 frequently asked

What is Mode-S code 4D23E1?
4D23E1 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-CAD.
Where is Mode-S 4D23E1 registered?
Mode-S code 4D23E1 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D23E1 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D23E1, octal 23221741, decimal 5,055,457.
What flights does 4D23E1 operate?
Mode-S 4D23E1 has broadcast 20 distinct callsigns, including CHZ2255, CHZ2256, ICL604, CHZ212, CHZ211.