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 8h ago
Flights observed
59
Distinct callsigns
20
Country
MT
Last broadcast
8h 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
AXY994E - 1 2026-05-03
AXY990N - 1 2026-05-31
AXY983T - 1 2026-05-29
AXY978A - 1 2026-04-16
AXY975P - 1 2026-06-01
AXY953Y - 1 2026-05-02
AXY945R - 1 2026-05-29
AXY921W - 1 2026-05-31
AXY913P - 1 2026-05-25
AXY909T - 1 2026-05-10
AXY898P - 1 2026-05-30
AXY874T - 1 2026-05-23
AXY827F - 1 2026-04-30
AXY754C - 1 2026-05-11
AXY739F - 1 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 AXY626N ATH → MLA Jun 2, 13:50 UTCJun 2, 15:10 UTC1h 20m
2026-06-02 AXY621M BRU → ATH Jun 2, 08:55 UTCJun 2, 11:55 UTC3h 0m
2026-06-01 AXY612K BUD → BRU Jun 1, 14:55 UTCJun 1, 16:35 UTC1h 40m
2026-06-01 AXY975P - Jun 1, 10:50 UTCJun 1, 12:15 UTC1h 25m
2026-06-01 AXY325G - Jun 1, 08:20 UTCJun 1, 09:05 UTC45m
2026-06-01 AXY131A - Jun 1, 05:45 UTCJun 1, 06:25 UTC40m
2026-05-31 AXY990N - May 31, 18:25 UTCMay 31, 19:30 UTC1h 5m
2026-05-31 AXY921W LTN → NCE May 31, 15:35 UTCMay 31, 17:10 UTC1h 35m
2026-05-31 AXY351G - May 31, 11:55 UTCMay 31, 13:45 UTC1h 50m
2026-05-30 AXY686J - May 30, 15:20 UTCMay 30, 17:30 UTC2h 10m
2026-05-30 AXY898P FAO → NCL May 30, 11:20 UTCMay 30, 14:05 UTC2h 45m
2026-05-30 AXY503G - May 30, 08:45 UTCMay 30, 09:15 UTC30m
2026-05-29 AXY237R - May 29, 18:10 UTCMay 29, 18:55 UTC45m
2026-05-29 AXY945R - May 29, 14:05 UTCMay 29, 14:40 UTC35m
2026-05-29 AXY983T - May 29, 10:25 UTCMay 29, 12:25 UTC2h 0m
2026-05-28 AXY280F LPL → CBG May 28, 15:25 UTCMay 28, 16:00 UTC35m
2026-05-28 AXY378U - May 28, 11:35 UTCMay 28, 14:00 UTC2h 25m
2026-05-27 AXY426F - May 27, 16:05 UTCMay 27, 18:15 UTC2h 10m
2026-05-27 AXY469H - May 27, 14:05 UTCMay 27, 15:00 UTC55m
2026-05-25 AXY473W - May 25, 15:35 UTCMay 25, 16:00 UTC25m
2026-05-25 AXY718A IBZ → BQH May 25, 12:20 UTCMay 25, 14:30 UTC2h 10m
2026-05-25 AXY913P - May 25, 09:00 UTCMay 25, 10:30 UTC1h 30m
2026-05-24 AXY341J - May 24, 17:05 UTCMay 24, 19:25 UTC2h 20m
2026-05-24 AXY499X - May 24, 13:45 UTCMay 24, 15:00 UTC1h 15m
2026-05-24 AXY456Y - May 24, 10:40 UTCMay 24, 12:45 UTC2h 5m
2026-05-23 AXY338P - May 23, 09:05 UTCMay 23, 11:25 UTC2h 20m
2026-05-23 AXY874T - May 23, 07:25 UTCMay 23, 07:55 UTC30m
2026-05-11 AXY754C - May 11, 17:40 UTCMay 11, 19:45 UTC2h 5m
2026-05-11 AXY287V - May 11, 14:25 UTCMay 11, 15:00 UTC35m
2026-05-10 AXY909T FCO → NCE May 10, 12:15 UTCMay 10, 13:10 UTC55m
2026-05-03 AXY994E - May 3, 14:25 UTCMay 3, 15:25 UTC1h 0m
2026-05-03 AXY697W SVQ → NCE May 3, 07:55 UTCMay 3, 09:45 UTC1h 50m
2026-05-02 AXY163J FAO → SVQ May 2, 13:05 UTCMay 2, 14:05 UTC1h 0m
2026-05-02 AXY953Y - May 2, 06:45 UTCMay 2, 08:25 UTC1h 40m
2026-05-01 AXY576K - May 1, 08:25 UTCMay 1, 10:15 UTC1h 50m
2026-04-30 AXY665F - Apr 30, 13:10 UTCApr 30, 13:40 UTC30m
2026-04-30 AXY827F - Apr 30, 07:15 UTCApr 30, 12:00 UTC4h 46m
2026-04-27 AXY210J - Apr 27, 11:10 UTCApr 27, 14:25 UTC3h 15m
2026-04-26 AXY413R - Apr 26, 16:10 UTCApr 26, 17:20 UTC1h 10m
2026-04-26 AXY737M NCE → LBG Apr 26, 13:30 UTCApr 26, 14:50 UTC1h 20m
2026-04-26 AXY146R - Apr 26, 09:30 UTCApr 26, 10:20 UTC50m
2026-04-26 AXY443J NCE → GVA Apr 26, 07:30 UTCApr 26, 08:10 UTC40m
2026-04-25 AXY725P - Apr 25, 15:20 UTCApr 25, 16:30 UTC1h 10m
2026-04-25 AXY99NR FDH → LBG Apr 25, 09:00 UTCApr 25, 10:10 UTC1h 10m
2026-04-21 AXY99NR - Apr 21, 14:20 UTCApr 21, 15:35 UTC1h 15m
2026-04-20 AXY240C - Apr 20, 13:30 UTCApr 20, 14:25 UTC55m
2026-04-20 AXY348T LTN → LBG Apr 20, 11:15 UTCApr 20, 12:05 UTC50m
2026-04-20 AXY550J GLA → LTN Apr 20, 08:15 UTCApr 20, 09:10 UTC55m
2026-04-19 AXY739F - Apr 19, 12:30 UTCApr 19, 15:40 UTC3h 10m
2026-04-18 AXY145J - Apr 18, 14:20 UTCApr 18, 16:10 UTC1h 50m

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 8h 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.