sensors Mode-S transponder

4D20A2

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-ISLA · EMBRAER EMB-135 Legacy

Hex
4D20A2
Octal
23220242
Decimal
5,054,626
Country
MT
Tail
9H-ISLA
Type
E35L
Broadcasting now · callsign AXY551N · 32,000 ft
Flights observed
93
Distinct callsigns
20
Country
MT
Last broadcast
23h ago

Current position

4D20A2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4D20A2 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
AXY934A - 3 2026-04-14
AXY526K - 3 2026-04-18
AXY253A - 3 2026-04-15
AXY878Y - 2 2026-04-13
AXY612S - 2 2026-05-27
AXY517F - 2 2026-04-17
AXY185M - 2 2026-04-18
AXY180X - 2 2026-04-16
AXY994S - 1 2026-04-12
AXY969U - 1 2026-04-23
AXY968E - 1 2026-05-03
AXY951S - 1 2026-05-05
AXY920T - 1 2026-05-04
AXY904U - 1 2026-05-03
AXY875X - 1 2026-05-02
AXY856Y - 1 2026-04-22
AXY835T - 1 2026-05-28
AXY772W - 1 2026-05-22
AXY768R - 1 2026-04-15
AXY726S - 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 AXY201V - May 29, 08:10 UTCMay 29, 11:50 UTC3h 40m
2026-05-29 AXY490A - May 29, 02:45 UTCMay 29, 06:30 UTC3h 45m
2026-05-28 AXY147U - May 28, 12:45 UTCMay 28, 16:55 UTC4h 10m
2026-05-28 AXY835T - May 28, 08:35 UTCMay 28, 10:10 UTC1h 35m
2026-05-27 AXY563S - May 27, 10:20 UTCMay 27, 11:50 UTC1h 30m
2026-05-27 AXY612S - May 27, 09:10 UTCMay 27, 09:35 UTC25m
2026-05-27 AXY612S - May 27, 07:20 UTCMay 27, 09:00 UTC1h 40m
2026-05-26 AXY401M - May 26, 09:49 UTCMay 26, 12:24 UTC2h 35m
2026-05-26 AXY566A - May 26, 07:40 UTCMay 26, 08:50 UTC1h 10m
2026-05-26 AXY535Y - May 26, 03:40 UTCMay 26, 06:10 UTC2h 30m
2026-05-25 AXY332U MLA → NCE May 25, 07:00 UTCMay 25, 08:40 UTC1h 40m
2026-05-25 AXY457G - May 25, 03:25 UTCMay 25, 05:50 UTC2h 25m
2026-05-24 AXY183S - May 24, 14:00 UTCMay 24, 18:45 UTC4h 45m
2026-05-24 AXY129A - May 24, 09:45 UTCMay 24, 12:00 UTC2h 15m
2026-05-23 AXY593S CEQ → BQH May 23, 17:05 UTCMay 23, 18:50 UTC1h 45m
2026-05-23 AXY726S IBZ → CEQ May 23, 11:45 UTCMay 23, 13:05 UTC1h 20m
2026-05-23 AXY663R - May 23, 08:25 UTCMay 23, 10:30 UTC2h 5m
2026-05-22 AXY697K FAO → BQH May 22, 14:20 UTCMay 22, 16:45 UTC2h 25m
2026-05-22 AXY772W LPL → FAO May 22, 10:40 UTCMay 22, 13:20 UTC2h 40m
2026-05-21 AXY607U GLA → LPL May 21, 19:10 UTCMay 21, 19:50 UTC40m
2026-05-21 AXY280K - May 21, 15:20 UTCMay 21, 18:15 UTC2h 55m
2026-05-20 AXY163C - May 20, 19:35 UTCMay 20, 22:05 UTC2h 30m
2026-05-20 AXY519R - May 20, 16:15 UTCMay 20, 17:25 UTC1h 10m
2026-05-20 AXY600M - May 20, 14:00 UTCMay 20, 15:00 UTC1h 0m
2026-05-19 AXY515U VIE → LTN May 19, 14:15 UTCMay 19, 16:10 UTC1h 55m
2026-05-18 AXY175T - May 18, 21:50 UTCMay 18, 23:05 UTC1h 15m
2026-05-18 AXY357A - May 18, 17:25 UTCMay 18, 18:50 UTC1h 24m
2026-05-17 AXY185W BCN → ATH May 17, 21:45 UTCMay 18, 00:10 UTC2h 25m
2026-05-17 AXY172W PMI → BCN May 17, 13:50 UTCMay 17, 14:35 UTC45m
2026-05-17 AXY311U - May 17, 10:40 UTCMay 17, 12:40 UTC2h 0m
2026-05-15 AXY245R PEG → LTN May 15, 14:10 UTCMay 15, 16:20 UTC2h 9m
2026-05-15 AXY592G - May 15, 12:10 UTCMay 15, 12:45 UTC35m
2026-05-15 AXY448H - May 15, 08:00 UTCMay 15, 10:15 UTC2h 15m
2026-05-14 AXY139F - May 14, 15:10 UTCMay 14, 17:25 UTC2h 15m
2026-05-14 AXY242S SKG → WAW May 14, 12:25 UTCMay 14, 14:20 UTC1h 55m
2026-05-14 AXY164G - May 14, 09:05 UTCMay 14, 10:00 UTC55m
2026-05-13 AXY131E - May 13, 14:05 UTCMay 13, 17:15 UTC3h 10m
2026-05-13 AXY676T - May 13, 10:45 UTCMay 13, 11:45 UTC1h 0m
2026-05-12 AXY314A BER → LTN May 12, 19:10 UTCMay 12, 20:50 UTC1h 40m
2026-05-11 AXY155V - May 11, 13:15 UTCMay 11, 14:50 UTC1h 35m
2026-05-10 AXY109P LEJ → FAB May 10, 12:15 UTCMay 10, 13:55 UTC1h 40m
2026-05-09 AXY696G - May 9, 13:10 UTCMay 9, 14:55 UTC1h 45m
2026-05-09 AXY184A - May 9, 11:00 UTCMay 9, 11:30 UTC30m
2026-05-06 AXY645V - May 6, 15:40 UTCMay 6, 17:35 UTC1h 54m
2026-05-06 AXY672H - May 6, 13:10 UTCMay 6, 13:50 UTC40m
2026-05-05 AXY710H - May 5, 16:50 UTCMay 5, 19:25 UTC2h 35m
2026-05-05 AXY951S - May 5, 14:00 UTCMay 5, 14:40 UTC40m
2026-05-04 AXY312N - May 4, 10:55 UTCMay 4, 14:05 UTC3h 10m
2026-05-04 AXY920T - May 4, 08:50 UTCMay 4, 09:35 UTC45m
2026-05-03 AXY718T LIN → NCE May 3, 16:05 UTCMay 3, 16:45 UTC40m

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

Mode-S 4D20A2 frequently asked

What is Mode-S code 4D20A2?
4D20A2 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-ISLA.
Where is Mode-S 4D20A2 registered?
Mode-S code 4D20A2 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D20A2 broadcasting right now?
Yes. Mode-S 4D20A2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4D20A2, octal 23220242, decimal 5,054,626.
What flights does 4D20A2 operate?
Mode-S 4D20A2 has broadcast 20 distinct callsigns, including AXY934A, AXY526K, AXY253A, AXY878Y, AXY612S.