sensors Mode-S transponder

4D20E1

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-CLG · BOMBARDIER Regional Jet CRJ-200

Hex
4D20E1
Octal
23220341
Decimal
5,054,689
Country
MT
Tail
9H-CLG
Type
CRJ2
No current signal · last broadcast 9h ago
Flights observed
148
Distinct callsigns
20
Country
MT
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 4D20E1.

Country allocation

The ICAO 24-bit address 4D20E1 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
AXY99NR - 2 2026-04-25
AXY771K - 2 2026-04-15
AXY545W - 2 2026-04-17
AXY427R - 2 2026-04-16
AXY158P - 2 2026-04-14
AXYY262W - 1 2026-07-16
AXY994E - 1 2026-05-03
AXY990N - 1 2026-05-31
AXY986P - 1 2026-06-15
AXY983T - 1 2026-05-29
AXY978A - 1 2026-04-16
AXY976J - 1 2026-06-12
AXY975P - 1 2026-06-01
AXY953Y - 1 2026-05-02
AXY950H - 1 2026-06-24
AXY945R - 1 2026-05-29
AXY941C - 1 2026-07-15
AXY931V - 1 2026-06-30
AXY929W - 1 2026-06-03
AXY925T - 1 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 AXY517M - Jul 17, 15:25 UTCJul 17, 17:09 UTC1h 45m
2026-07-17 AXY411F - Jul 17, 12:10 UTCJul 17, 13:29 UTC1h 20m
2026-07-17 AXY497F LBG → PSA Jul 17, 09:35 UTCJul 17, 11:00 UTC1h 25m
2026-07-16 AXY599A OLB → LBG Jul 16, 13:25 UTCJul 16, 15:10 UTC1h 45m
2026-07-16 AXYY262W - Jul 16, 10:25 UTCJul 16, 11:10 UTC45m
2026-07-16 AXY771J - Jul 16, 07:25 UTCJul 16, 08:55 UTC1h 30m
2026-07-16 AXY454U - Jul 16, 04:20 UTCJul 16, 06:05 UTC1h 45m
2026-07-15 AXY122S - Jul 15, 13:05 UTCJul 15, 16:05 UTC3h 0m
2026-07-15 AXY941C - Jul 15, 10:25 UTCJul 15, 11:40 UTC1h 15m
2026-07-14 AXY412R - Jul 14, 14:05 UTCJul 14, 15:15 UTC1h 10m
2026-07-14 AXY668G - Jul 14, 06:10 UTCJul 14, 07:05 UTC55m
2026-07-13 AXY345A - Jul 13, 17:05 UTCJul 13, 18:50 UTC1h 45m
2026-07-13 AXY0120 - Jul 13, 14:30 UTCJul 13, 15:35 UTC1h 5m
2026-07-13 AXY460J LIN → IBZ Jul 13, 10:05 UTCJul 13, 11:35 UTC1h 30m
2026-07-12 AXY798R - Jul 12, 16:45 UTCJul 12, 17:45 UTC1h 0m
2026-07-12 AXY676H - Jul 12, 14:30 UTCJul 12, 15:20 UTC50m
2026-07-11 AXY306G - Jul 11, 19:05 UTCJul 11, 20:30 UTC1h 25m
2026-07-11 AXY119J - Jul 11, 14:45 UTCJul 11, 15:30 UTC45m
2026-07-11 AXY420V - Jul 11, 11:20 UTCJul 11, 12:35 UTC1h 15m
2026-07-10 AXY684W IBZ → ISL Jul 10, 12:40 UTCJul 10, 15:40 UTC3h 0m
2026-07-09 AXY2125 MAD → IBZ Jul 9, 15:50 UTCJul 9, 16:40 UTC50m
2026-07-09 AXY236Y BCN → MAD Jul 9, 12:20 UTCJul 9, 13:10 UTC50m
2026-07-09 AXY136H LIN → BCN Jul 9, 09:30 UTCJul 9, 10:45 UTC1h 15m
2026-07-08 AXY925T BCN → LIN Jul 8, 11:30 UTCJul 8, 12:45 UTC1h 15m
2026-07-07 AXY660W SKG → BCN Jul 7, 09:15 UTCJul 7, 11:50 UTC2h 35m
2026-07-06 AXY846J - Jul 6, 17:40 UTCJul 6, 18:15 UTC35m
2026-07-06 AXY445G - Jul 6, 15:50 UTCJul 6, 17:00 UTC1h 10m
2026-07-06 AXY820K - Jul 6, 13:40 UTCJul 6, 14:40 UTC1h 0m
2026-07-06 AXY387P - Jul 6, 09:25 UTCJul 6, 11:35 UTC2h 10m
2026-07-05 AXY729E - Jul 5, 16:20 UTCJul 5, 18:00 UTC1h 40m
2026-07-02 AXY309H - Jul 2, 07:20 UTCJul 2, 09:35 UTC2h 15m
2026-07-01 AXY329V - Jul 1, 16:25 UTCJul 1, 17:50 UTC1h 25m
2026-07-01 AXY484S - Jul 1, 12:30 UTCJul 1, 14:05 UTC1h 35m
2026-07-01 AXY759N - Jul 1, 08:30 UTCJul 1, 10:20 UTC1h 50m
2026-07-01 AXY620C IBZ → VLC Jul 1, 00:25 UTCJul 1, 00:50 UTC25m
2026-06-30 AXY183K - Jun 30, 21:20 UTCJun 30, 23:10 UTC1h 50m
2026-06-30 AXY270R - Jun 30, 12:15 UTCJun 30, 13:45 UTC1h 30m
2026-06-30 AXY931V LPL → GVA Jun 30, 08:10 UTCJun 30, 09:40 UTC1h 30m
2026-06-29 AXY686U NCE → LPL Jun 29, 13:34 UTCJun 29, 15:39 UTC2h 5m
2026-06-29 AXY2512 ORY → NCE Jun 29, 11:20 UTCJun 29, 12:34 UTC1h 15m
2026-06-29 AXY2411 SVQ → ORY Jun 29, 06:54 UTCJun 29, 09:05 UTC2h 10m
2026-06-28 AXY412W - Jun 28, 15:20 UTCJun 28, 17:55 UTC2h 35m
2026-06-28 AXY831A - Jun 28, 10:24 UTCJun 28, 11:00 UTC35m
2026-06-28 AXY356R - Jun 28, 07:25 UTCJun 28, 09:15 UTC1h 50m
2026-06-27 AXY442T - Jun 27, 16:04 UTCJun 27, 18:45 UTC2h 40m
2026-06-27 AXY360H NCE → MAN Jun 27, 13:04 UTCJun 27, 14:54 UTC1h 50m
2026-06-26 AXY787P - Jun 26, 15:29 UTCJun 26, 16:44 UTC1h 15m
2026-06-26 AXY580K BHX → LBG Jun 26, 13:10 UTCJun 26, 14:09 UTC1h 0m
2026-06-26 AXY836Y DBV → BHX Jun 26, 09:24 UTCJun 26, 12:00 UTC2h 35m
2026-06-25 AXY825V - Jun 25, 13:55 UTCJun 25, 15:04 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 9H-CLG page for operator, model, and routing details .

Mode-S 4D20E1 frequently asked

What is Mode-S code 4D20E1?
4D20E1 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-CLG.
Where is Mode-S 4D20E1 registered?
Mode-S code 4D20E1 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D20E1 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D20E1, octal 23220341, decimal 5,054,689.
What flights does 4D20E1 operate?
Mode-S 4D20E1 has broadcast 20 distinct callsigns, including AXY99NR, AXY771K, AXY545W, AXY427R, AXY158P.