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sensors Mode-S transponder

4A2183

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-HLC · BOEING 737-800

Hex
4A2183
Octal
22420603
Decimal
4,858,243
Country
RO
Tail
YR-HLC
Type
B738
Broadcasting now · callsign HLJ1GL · 35,000 ft
Flights observed
432
Distinct callsigns
20
Country
RO
Last broadcast
Jul 26, 15:10 UTC

Current position

4A2183 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4A2183 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
AEZ2119 Aerial Transit Company 51 2026-06-11
AEZ2114 - 50 2026-06-12
AEZ965S Aerial Transit Company 45 2026-06-12
AEZ2121 Aerial Transit Company 45 2026-06-12
AEZ2118 Aerial Transit Company 45 2026-06-12
AEZ218D - 44 2026-06-12
HLJ2EY - 22 2026-07-16
HLJ2VV - 21 2026-07-20
HLJ3BF - 15 2026-07-26
HLJ2GJ - 8 2026-07-23
HLJ1GL - 8 2026-07-24
HLJ1AM - 8 2026-07-24
HLJ1025 - 8 2026-07-24
HLJ4AB - 7 2026-07-22
AEZ842T Aerial Transit Company 7 2026-05-17
AEZ168T Aerial Transit Company 7 2026-05-17
AEZ514C Aerial Transit Company 6 2026-05-17
AEZ155Z Aerial Transit Company 6 2026-05-17
HLJ1024 - 5 2026-07-17
HLJ5TS - 3 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HLJ3BF PRG → PRG Jul 26, 05:35 UTCJul 26, 15:05 UTC9h 31m
2026-07-25 HLJ3BF PRG → PRG Jul 25, 05:20 UTCJul 25, 14:50 UTC9h 30m
2026-07-24 HLJ1025 PRG → PRG Jul 24, 18:20 UTCJul 25, 04:15 UTC9h 55m
2026-07-24 HLJ1AM - Jul 24, 08:00 UTCJul 24, 09:45 UTC1h 45m
2026-07-24 HLJ1GL - Jul 24, 05:10 UTCJul 24, 06:50 UTC1h 40m
2026-07-23 HLJ2GJ PED → PRG Jul 23, 17:20 UTCJul 24, 04:00 UTC10h 40m
2026-07-23 HLJ2TT PRG → PED Jul 23, 05:10 UTCJul 23, 15:10 UTC10h 0m
2026-07-22 HLJ3BF - Jul 22, 11:25 UTCJul 22, 14:25 UTC3h 0m
2026-07-22 HLJ4AB - Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-21 HLJ1025 PRG → PRG Jul 21, 18:00 UTCJul 22, 03:50 UTC9h 50m
2026-07-21 HLJ1AM - Jul 21, 14:10 UTCJul 21, 16:05 UTC1h 55m
2026-07-21 HLJ5TS - Jul 21, 11:20 UTCJul 21, 12:55 UTC1h 35m
2026-07-21 HLJ3WT - Jul 21, 08:20 UTCJul 21, 10:05 UTC1h 45m
2026-07-21 HLJ1GL - Jul 21, 05:20 UTCJul 21, 07:00 UTC1h 40m
2026-07-20 HLJ2VV PRG → PRG Jul 20, 05:10 UTCJul 20, 15:05 UTC9h 55m
2026-07-19 HLJ4AB PRG → PRG Jul 19, 05:35 UTCJul 19, 15:10 UTC9h 35m
2026-07-18 HLJ3BF PRG → PRG Jul 18, 05:30 UTCJul 18, 15:10 UTC9h 40m
2026-07-17 HLJ1024 PRG → PRG Jul 17, 18:25 UTCJul 18, 04:10 UTC9h 46m
2026-07-17 HLJ1AM - Jul 17, 08:04 UTCJul 17, 09:55 UTC1h 50m
2026-07-17 HLJ1GL - Jul 17, 05:10 UTCJul 17, 06:54 UTC1h 45m
2026-07-16 HLJ2GJ PED → PRG Jul 16, 17:30 UTCJul 17, 03:59 UTC10h 30m
2026-07-16 HLJ2EY PRG → PED Jul 16, 05:20 UTCJul 16, 15:19 UTC10h 0m
2026-07-15 HLJ3BF PRG → PRG Jul 15, 05:15 UTCJul 15, 15:20 UTC10h 5m
2026-07-14 HLJ1025 - Jul 14, 21:05 UTCJul 15, 03:40 UTC6h 34m
2026-07-14 HLJ1024 - Jul 14, 17:50 UTCJul 14, 20:50 UTC3h 0m
2026-07-14 HLJ1AM - Jul 14, 14:30 UTCJul 14, 16:25 UTC1h 55m
2026-07-14 HLJ5TS - Jul 14, 11:20 UTCJul 14, 12:55 UTC1h 35m
2026-07-14 HLJ3WT - Jul 14, 08:05 UTCJul 14, 10:00 UTC1h 55m
2026-07-14 HLJ1GL - Jul 14, 05:10 UTCJul 14, 06:55 UTC1h 45m
2026-07-13 HLJ2VV - Jul 13, 12:20 UTCJul 13, 14:55 UTC2h 35m
2026-07-13 HLJ2EY - Jul 13, 05:10 UTCJul 13, 12:05 UTC6h 55m
2026-07-12 HLJ4AB PRG → PRG Jul 12, 05:45 UTCJul 12, 14:55 UTC9h 10m
2026-07-11 HLJ3BF - Jul 11, 05:31 UTCJul 11, 15:15 UTC9h 45m
2026-07-11 HLJ1025 - Jul 11, 01:25 UTCJul 11, 04:05 UTC2h 40m
2026-07-10 HLJ1024 - Jul 10, 18:15 UTCJul 11, 01:20 UTC7h 5m
2026-07-10 HLJ1AM - Jul 10, 08:05 UTCJul 10, 10:00 UTC1h 55m
2026-07-10 HLJ1GL - Jul 10, 05:15 UTCJul 10, 06:45 UTC1h 30m
2026-07-09 HLJ2GJ PED → PRG Jul 9, 17:45 UTCJul 10, 03:50 UTC10h 5m
2026-07-09 HLJ2TT PRG → PED Jul 9, 05:20 UTCJul 9, 15:15 UTC9h 55m
2026-07-08 HLJ3BF PRG → PRG Jul 8, 05:35 UTCJul 8, 14:50 UTC9h 15m
2026-07-07 HLJ1024 PRG → PRG Jul 7, 17:55 UTCJul 8, 04:05 UTC10h 10m
2026-07-07 HLJ1AM - Jul 7, 14:05 UTCJul 7, 16:00 UTC1h 55m
2026-07-07 HLJ5TS PED → BOJ Jul 7, 11:30 UTCJul 7, 13:05 UTC1h 35m
2026-07-07 HLJ3WT - Jul 7, 08:05 UTCJul 7, 09:55 UTC1h 50m
2026-07-07 HLJ1GL - Jul 7, 05:10 UTCJul 7, 06:50 UTC1h 40m
2026-07-06 HLJ2VV - Jul 6, 05:20 UTCJul 6, 15:05 UTC9h 45m
2026-07-05 HLJ3BF - Jul 5, 12:30 UTCJul 5, 15:15 UTC2h 45m
2026-07-05 HLJ4AB - Jul 5, 05:30 UTCJul 5, 12:20 UTC6h 50m
2026-07-04 HLJ3BF PRG → PRG Jul 4, 05:20 UTCJul 4, 14:55 UTC9h 35m
2026-07-03 HLJ1025 PRG → PRG Jul 3, 18:30 UTCJul 4, 04:10 UTC9h 40m

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

Mode-S 4A2183 frequently asked

What is Mode-S code 4A2183?
4A2183 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-HLC.
Where is Mode-S 4A2183 registered?
Mode-S code 4A2183 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A2183 broadcasting right now?
Yes. Mode-S 4A2183 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A2183, octal 22420603, decimal 4,858,243.
What flights does 4A2183 operate?
Mode-S 4A2183 has broadcast 20 distinct callsigns, including AEZ2119, AEZ2114, AEZ965S, AEZ2121, AEZ2118.