Apparatus

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sensors Mode-S transponder

4D2161

ICAO 24-bit transponder address · allocated to Malta

Currently assigned to 9H-SEY · AIRBUS A-320

Hex
4D2161
Octal
23220541
Decimal
5,054,817
Country
MT
Tail
9H-SEY
Type
A320
No current signal · last broadcast 8h ago
Flights observed
75
Distinct callsigns
20
Country
MT
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 4D2161.

Country allocation

The ICAO 24-bit address 4D2161 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
AHY035 Azerbaijan Airlines 13 2026-06-13
AHY036 Azerbaijan Airlines 10 2026-06-13
AHY8003 Azerbaijan Airlines 7 2026-06-10
AHY071 Azerbaijan Airlines 5 2026-05-22
AHY063 Azerbaijan Airlines 5 2026-06-07
AHY8105 Azerbaijan Airlines 4 2026-06-11
AHY077 Azerbaijan Airlines 3 2026-05-29
AHY072 Azerbaijan Airlines 3 2026-05-22
AHY064 Azerbaijan Airlines 3 2026-05-28
AHY8224 Azerbaijan Airlines 2 2026-05-29
AHY8106 Azerbaijan Airlines 2 2026-06-12
AHY8104 Azerbaijan Airlines 2 2026-05-30
AHY8103 Azerbaijan Airlines 2 2026-05-30
AHY8004 Azerbaijan Airlines 2 2026-06-03
AHY109 Azerbaijan Airlines 2 2026-05-31
AHY8238 Azerbaijan Airlines 1 2026-06-04
AHY8237 Azerbaijan Airlines 1 2026-06-04
AHY8226 Azerbaijan Airlines 1 2026-06-04
AHY8042 Azerbaijan Airlines 1 2026-05-31
AHY704 Azerbaijan Airlines 1 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-13 AHY036 MXP → GYD Jun 13, 09:30 UTCJun 13, 13:25 UTC3h 55m
2026-06-13 AHY035 GYD → MXP Jun 13, 03:20 UTCJun 13, 08:05 UTC4h 44m
2026-06-12 AHY8106 SAW → GYD Jun 12, 13:15 UTCJun 12, 15:10 UTC1h 55m
2026-06-11 AHY8105 GYD → SAW Jun 11, 16:50 UTCJun 12, 11:50 UTC19h 1m
2026-06-11 AHY8105 GYD → SAW Jun 11, 12:20 UTCJun 12, 11:50 UTC23h 31m
2026-06-11 AHY036 MXP → GYD Jun 11, 10:20 UTCJun 12, 10:15 UTC23h 56m
2026-06-11 AHY036 MXP → GYD Jun 11, 10:05 UTCJun 11, 21:45 UTC11h 40m
2026-06-11 AHY035 GYD → MXP Jun 11, 04:05 UTCJun 11, 05:35 UTC1h 30m
2026-06-10 AHY8003 GYD → ESB Jun 10, 16:50 UTCJun 10, 18:15 UTC1h 25m
2026-06-09 AHY036 MXP → GYD Jun 9, 09:55 UTCJun 9, 21:40 UTC11h 45m
2026-06-08 AHY035 GYD → MXP Jun 8, 13:10 UTCJun 9, 08:05 UTC18h 55m
2026-06-08 AHY035 GYD → MXP Jun 8, 10:20 UTCJun 9, 08:05 UTC21h 45m
2026-06-08 AHY035 GYD → MXP Jun 8, 09:45 UTCJun 9, 08:05 UTC22h 20m
2026-06-07 AHY035 GYD → MXP Jun 7, 13:15 UTCJun 8, 08:10 UTC18h 55m
2026-06-07 AHY035 GYD → MXP Jun 7, 10:20 UTCJun 8, 08:10 UTC21h 50m
2026-06-07 AHY035 GYD → MXP Jun 7, 09:50 UTCJun 8, 08:10 UTC22h 20m
2026-06-07 AHY063 GYD → BER Jun 7, 04:05 UTCJun 7, 08:25 UTC4h 20m
2026-06-06 AHY036 MXP → GYD Jun 6, 09:55 UTCJun 6, 21:40 UTC11h 45m
2026-06-06 AHY035 GYD → MXP Jun 6, 03:45 UTCJun 6, 08:15 UTC4h 30m
2026-06-05 AHY8106 SAW → GYD Jun 5, 13:35 UTCJun 5, 15:25 UTC1h 50m
2026-06-05 AHY8105 GYD → SAW Jun 5, 11:20 UTCJun 5, 11:45 UTC25m
2026-06-05 AHY8105 GYD → SAW Jun 5, 09:25 UTCJun 5, 10:50 UTC1h 25m
2026-06-04 AHY8238 TBS → GYD Jun 4, 22:10 UTCJun 4, 22:40 UTC30m
2026-06-04 AHY8237 GYD → TBS Jun 4, 20:05 UTCJun 4, 20:50 UTC45m
2026-06-04 AHY8226 TBS → GYD Jun 4, 17:25 UTCJun 4, 18:15 UTC50m
2026-06-03 AHY8004 ESB → GYD Jun 3, 21:10 UTCJun 4, 16:05 UTC18h 55m
2026-06-03 AHY8004 ESB → GYD Jun 3, 18:20 UTCJun 4, 16:05 UTC21h 45m
2026-06-03 AHY8003 GYD → ESB Jun 3, 16:55 UTCJun 4, 16:05 UTC23h 10m
2026-06-02 AHY8003 GYD → ESB Jun 2, 20:20 UTCJun 3, 18:20 UTC22h 0m
2026-06-02 AHY8003 GYD → ESB Jun 2, 16:40 UTCJun 2, 18:15 UTC1h 35m
2026-06-02 AHY704 RMO → GYD Jun 2, 06:25 UTCJun 2, 13:05 UTC6h 40m
2026-06-01 AHY110 PRG → GYD Jun 1, 11:55 UTCJun 1, 15:25 UTC3h 30m
2026-05-31 AHY109 GYD → PRG May 31, 16:45 UTCJun 1, 10:05 UTC17h 20m
2026-05-31 AHY109 GYD → PRG May 31, 10:20 UTCJun 1, 10:05 UTC23h 45m
2026-05-31 AHY8042 ADB → GYD May 31, 09:55 UTCJun 1, 07:15 UTC21h 20m
2026-05-30 AHY8104 SAW → GYD May 30, 07:35 UTCMay 30, 09:25 UTC1h 50m
2026-05-30 AHY8103 GYD → SAW May 30, 05:55 UTCMay 30, 06:05 UTC10m
2026-05-29 AHY8103 GYD → SAW May 29, 20:20 UTCMay 30, 05:10 UTC8h 50m
2026-05-29 AHY077 GYD → IST May 29, 16:15 UTCMay 29, 17:35 UTC1h 20m
2026-05-29 AHY8224 TBS → GYD May 29, 08:10 UTCMay 29, 08:35 UTC25m
2026-05-29 AHY8224 TBS → GYD May 29, 06:05 UTCMay 29, 06:35 UTC30m
2026-05-28 AHY8003 GYD → ESB May 28, 17:00 UTCMay 28, 21:45 UTC4h 45m
2026-05-28 AHY064 BER → GYD May 28, 09:50 UTCMay 28, 13:20 UTC3h 30m
2026-05-28 AHY063 GYD → BER May 28, 08:20 UTCMay 28, 08:35 UTC15m
2026-05-28 AHY063 GYD → BER May 28, 04:00 UTCMay 28, 05:20 UTC1h 20m
2026-05-27 AHY8003 GYD → ESB May 27, 16:55 UTCMay 27, 21:35 UTC4h 40m
2026-05-26 AHY703 GYD → RMO May 26, 22:20 UTCMay 27, 12:45 UTC14h 25m
2026-05-26 AHY077 GYD → IST May 26, 18:30 UTCMay 26, 18:40 UTC10m
2026-05-26 AHY077 GYD → IST May 26, 06:20 UTCMay 26, 17:44 UTC11h 25m
2026-05-25 AHY8104 SAW → GYD May 25, 08:35 UTCMay 25, 09:45 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-SEY page for operator, model, and routing details .

Mode-S 4D2161 frequently asked

What is Mode-S code 4D2161?
4D2161 is an ICAO 24-bit transponder address. Allocated to Malta. Assigned to 9H-SEY.
Where is Mode-S 4D2161 registered?
Mode-S code 4D2161 is allocated to Malta (MT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4D2161 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 4D2161, octal 23220541, decimal 5,054,817.
What flights does 4D2161 operate?
Mode-S 4D2161 has broadcast 20 distinct callsigns, including AHY035, AHY036, AHY8003, AHY071, AHY063.