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sensors Mode-S transponder

4A2184

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-HLD · BOEING 737-800

Hex
4A2184
Octal
22420604
Decimal
4,858,244
Country
RO
Tail
YR-HLD
Type
B738
No current signal · last broadcast Jul 26, 20:40 UTC
Flights observed
365
Distinct callsigns
20
Country
RO
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S 4A2184.

Country allocation

The ICAO 24-bit address 4A2184 falls within the block assigned to Romania (RO) by ICAO Annex 10, Volume III. Every aircraft registered in Romania 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
AEZ965S Aerial Transit Company 33 2026-07-26
AEZ2118 Aerial Transit Company 32 2026-07-26
AEZ2121 Aerial Transit Company 31 2026-07-26
AEZ2119 Aerial Transit Company 31 2026-07-26
AEZ218D - 30 2026-07-26
AEZ2114 Aerial Transit Company 28 2026-07-26
AEZ842V - 18 2026-07-16
AEZ2364 - 18 2026-07-16
AEZ69FS - 16 2026-07-16
AEZ75HH - 15 2026-07-16
AEZ8765 - 13 2026-07-16
AEZ94GL - 11 2026-07-16
AEZ836S - 9 2026-07-16
AEZ8041 - 9 2026-07-15
AEZ48LG - 9 2026-07-15
AEZ38TM - 9 2026-07-16
AEZ112X - 7 2026-07-09
AEZ81GR - 6 2026-07-09
AEZ2349 - 6 2026-07-12
AEZ842T Aerial Transit Company 4 2026-04-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 AEZ2119 FCO → CIY Jul 26, 19:40 UTCJul 26, 20:35 UTC55m
2026-07-26 AEZ2118 CIY → FCO Jul 26, 16:50 UTCJul 26, 17:55 UTC1h 5m
2026-07-26 AEZ2121 BGY → CIY Jul 26, 13:40 UTCJul 26, 15:10 UTC1h 30m
2026-07-26 AEZ965S CIY → BGY Jul 26, 10:40 UTCJul 26, 12:15 UTC1h 35m
2026-07-26 AEZ218D - Jul 26, 08:05 UTCJul 26, 09:05 UTC1h 0m
2026-07-26 AEZ2114 FCO → CIY Jul 26, 05:15 UTCJul 26, 06:15 UTC1h 0m
2026-07-25 AEZ2119 FCO → CIY Jul 25, 19:35 UTCJul 25, 20:25 UTC50m
2026-07-25 AEZ2118 CIY → FCO Jul 25, 16:40 UTCJul 25, 17:40 UTC1h 0m
2026-07-25 AEZ2121 BGY → CIY Jul 25, 13:50 UTCJul 25, 15:05 UTC1h 15m
2026-07-25 AEZ965S CIY → BGY Jul 25, 10:15 UTCJul 25, 11:50 UTC1h 35m
2026-07-25 AEZ218D - Jul 25, 08:15 UTCJul 25, 09:05 UTC50m
2026-07-25 AEZ2114 FCO → CIY Jul 25, 05:20 UTCJul 25, 06:20 UTC1h 0m
2026-07-24 AEZ2119 FCO → CIY Jul 24, 20:20 UTCJul 24, 21:15 UTC55m
2026-07-24 AEZ2118 CIY → FCO Jul 24, 16:55 UTCJul 24, 17:55 UTC1h 0m
2026-07-24 AEZ2121 BGY → CIY Jul 24, 13:35 UTCJul 24, 15:00 UTC1h 25m
2026-07-24 AEZ965S CIY → BGY Jul 24, 10:20 UTCJul 24, 11:50 UTC1h 30m
2026-07-24 AEZ218D - Jul 24, 08:00 UTCJul 24, 08:50 UTC50m
2026-07-24 AEZ2114 FCO → CIY Jul 24, 05:20 UTCJul 24, 06:20 UTC1h 0m
2026-07-23 AEZ2119 FCO → CIY Jul 23, 19:15 UTCJul 23, 20:10 UTC55m
2026-07-23 AEZ2118 CIY → FCO Jul 23, 16:40 UTCJul 23, 17:40 UTC1h 0m
2026-07-23 AEZ2121 BGY → CIY Jul 23, 13:45 UTCJul 23, 15:20 UTC1h 35m
2026-07-23 AEZ965S CIY → BGY Jul 23, 10:30 UTCJul 23, 12:05 UTC1h 35m
2026-07-23 AEZ218D - Jul 23, 07:55 UTCJul 23, 08:50 UTC55m
2026-07-23 AEZ2114 FCO → CIY Jul 23, 05:20 UTCJul 23, 06:25 UTC1h 5m
2026-07-22 AEZ2119 FCO → CIY Jul 22, 19:10 UTCJul 22, 20:05 UTC55m
2026-07-22 AEZ2118 CIY → FCO Jul 22, 16:40 UTCJul 22, 17:40 UTC1h 0m
2026-07-22 AEZ2121 BGY → CIY Jul 22, 13:40 UTCJul 22, 15:10 UTC1h 30m
2026-07-22 AEZ965S CIY → BGY Jul 22, 11:10 UTCJul 22, 12:05 UTC55m
2026-07-21 AEZ2119 - Jul 21, 19:15 UTCJul 21, 20:05 UTC50m
2026-07-21 AEZ2118 CIY → FCO Jul 21, 16:40 UTCJul 21, 17:40 UTC1h 0m
2026-07-21 AEZ2121 BGY → CIY Jul 21, 13:45 UTCJul 21, 15:10 UTC1h 25m
2026-07-21 AEZ965S CIY → BGY Jul 21, 10:25 UTCJul 21, 12:00 UTC1h 35m
2026-07-21 AEZ218D - Jul 21, 07:40 UTCJul 21, 08:35 UTC55m
2026-07-21 AEZ2114 FCO → CIY Jul 21, 05:30 UTCJul 21, 06:30 UTC1h 0m
2026-07-20 AEZ2119 - Jul 20, 19:10 UTCJul 20, 20:05 UTC55m
2026-07-20 AEZ2118 CIY → FCO Jul 20, 16:45 UTCJul 20, 17:45 UTC1h 0m
2026-07-20 AEZ2121 BGY → CIY Jul 20, 13:35 UTCJul 20, 15:00 UTC1h 25m
2026-07-20 AEZ965S - Jul 20, 10:15 UTCJul 20, 11:50 UTC1h 35m
2026-07-20 AEZ218D - Jul 20, 08:10 UTCJul 20, 09:00 UTC50m
2026-07-20 AEZ2114 FCO → CIY Jul 20, 05:15 UTCJul 20, 06:10 UTC55m
2026-07-19 AEZ2119 - Jul 19, 19:10 UTCJul 19, 20:05 UTC55m
2026-07-19 AEZ2118 CIY → FCO Jul 19, 16:45 UTCJul 19, 17:45 UTC1h 0m
2026-07-19 AEZ2121 BGY → CIY Jul 19, 13:40 UTCJul 19, 15:05 UTC1h 25m
2026-07-19 AEZ965S - Jul 19, 10:10 UTCJul 19, 11:40 UTC1h 30m
2026-07-19 AEZ218D - Jul 19, 07:35 UTCJul 19, 08:30 UTC55m
2026-07-19 AEZ2114 FCO → CIY Jul 19, 05:10 UTCJul 19, 06:10 UTC1h 0m
2026-07-18 AEZ2119 - Jul 18, 19:05 UTCJul 18, 20:00 UTC55m
2026-07-18 AEZ2118 - Jul 18, 16:50 UTCJul 18, 17:50 UTC1h 0m
2026-07-18 AEZ2121 BGY → CIY Jul 18, 13:45 UTCJul 18, 15:10 UTC1h 25m
2026-07-18 AEZ965S - Jul 18, 10:10 UTCJul 18, 11:45 UTC1h 35m

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 YR-HLD page for operator, model, and routing details .

Mode-S 4A2184 frequently asked

What is Mode-S code 4A2184?
4A2184 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-HLD.
Where is Mode-S 4A2184 registered?
Mode-S code 4A2184 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A2184 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A2184, octal 22420604, decimal 4,858,244.
What flights does 4A2184 operate?
Mode-S 4A2184 has broadcast 20 distinct callsigns, including AEZ965S, AEZ2118, AEZ2121, AEZ2119, AEZ218D.