sensors Mode-S transponder

4A2182

ICAO 24-bit transponder address · allocated to Romania

Currently assigned to YR-HLB · BOEING 737-800

Hex
4A2182
Octal
22420602
Decimal
4,858,242
Country
RO
Tail
YR-HLB
Type
B738
Broadcasting now · callsign HLJ1EG · 38,000 ft
Flights observed
69
Distinct callsigns
14
Country
RO
Last broadcast
6h ago

Current position

4A2182 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4A2182 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 14 distinct

Callsign Airline Flights Last seen
HLJ1AC - 24 2026-05-28
HLJ1EG - 17 2026-05-25
HLJ3DF - 10 2026-05-29
HLJ3AP - 7 2026-05-17
HLJ1AD - 2 2026-05-24
HLJ810F - 1 2026-05-28
HLJ808F - 1 2026-05-27
HLJ804F - 1 2026-05-21
HLJ803F - 1 2026-05-21
HLJ5GH - 1 2026-05-27
HLJ5AF - 1 2026-05-27
HLJ4AB - 1 2026-05-21
HLJ3BF - 1 2026-05-28
HLJ1CF - 1 2026-04-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 HLJ3DF - May 29, 22:10 UTCMay 30, 00:25 UTC2h 15m
2026-05-28 HLJ1AC BRQ → BRQ May 28, 22:35 UTCMay 29, 10:00 UTC11h 25m
2026-05-28 HLJ810F PRG → BRQ May 28, 20:20 UTCMay 28, 20:50 UTC30m
2026-05-28 HLJ3BF PRG → PRG May 28, 06:40 UTCMay 28, 16:05 UTC9h 25m
2026-05-27 HLJ5AF - May 27, 15:30 UTCMay 27, 17:45 UTC2h 15m
2026-05-27 HLJ5GH - May 27, 12:00 UTCMay 27, 13:55 UTC1h 55m
2026-05-27 HLJ808F - May 27, 10:35 UTCMay 27, 11:00 UTC25m
2026-05-26 HLJ1AC BRQ → BRQ May 26, 22:05 UTCMay 27, 09:15 UTC11h 10m
2026-05-25 HLJ1AC - May 25, 13:45 UTCMay 26, 00:24 UTC10h 40m
2026-05-25 HLJ1EG - May 25, 01:55 UTCMay 25, 11:30 UTC9h 35m
2026-05-24 HLJ1AD - May 24, 10:00 UTCMay 24, 20:20 UTC10h 20m
2026-05-23 HLJ1EG - May 23, 23:35 UTCMay 24, 08:50 UTC9h 15m
2026-05-23 HLJ1EG - May 23, 12:40 UTCMay 24, 08:50 UTC20h 11m
2026-05-23 HLJ1EG - May 23, 10:35 UTCMay 24, 08:50 UTC22h 16m
2026-05-23 HLJ1EG - May 23, 10:10 UTCMay 24, 08:30 UTC22h 21m
2026-05-22 HLJ3DF - May 22, 22:05 UTCMay 23, 08:40 UTC10h 34m
2026-05-21 HLJ1AC BRQ → BRQ May 21, 22:30 UTCMay 22, 09:05 UTC10h 35m
2026-05-21 HLJ804F PRG → BRQ May 21, 19:50 UTCMay 21, 20:15 UTC25m
2026-05-21 HLJ4AB PRG → PRG May 21, 08:35 UTCMay 21, 18:10 UTC9h 35m
2026-05-21 HLJ803F BRQ → PRG May 21, 06:45 UTCMay 21, 07:10 UTC25m
2026-05-19 HLJ1AC BRQ → BRQ May 19, 22:20 UTCMay 20, 09:15 UTC10h 56m
2026-05-18 HLJ1AC - May 18, 13:10 UTCMay 19, 00:20 UTC11h 9m
2026-05-18 HLJ1EG - May 18, 00:15 UTCMay 18, 11:35 UTC11h 20m
2026-05-17 HLJ3AP - May 17, 10:35 UTCMay 17, 20:50 UTC10h 15m
2026-05-16 HLJ1EG - May 16, 22:45 UTCMay 17, 09:25 UTC10h 40m
2026-05-16 HLJ3AP - May 16, 10:20 UTCMay 16, 21:25 UTC11h 5m
2026-05-15 HLJ3DF - May 15, 22:20 UTCMay 16, 09:10 UTC10h 51m
2026-05-14 HLJ1AC - May 14, 22:45 UTCMay 15, 09:50 UTC11h 5m
2026-05-12 HLJ1AC - May 12, 22:10 UTCMay 13, 09:50 UTC11h 40m
2026-05-11 HLJ3AP - May 11, 13:30 UTCMay 11, 22:35 UTC9h 5m
2026-05-11 HLJ1EG - May 11, 10:05 UTCMay 11, 12:10 UTC2h 5m
2026-05-11 HLJ1EG - May 11, 08:25 UTCMay 11, 09:30 UTC1h 5m
2026-05-11 HLJ3DF - May 11, 00:10 UTCMay 11, 02:30 UTC2h 20m
2026-05-10 HLJ3AP - May 10, 10:19 UTCMay 10, 18:25 UTC8h 5m
2026-05-09 HLJ1EG - May 9, 22:45 UTCMay 10, 09:10 UTC10h 25m
2026-05-09 HLJ1AC - May 9, 10:10 UTCMay 9, 21:19 UTC11h 10m
2026-05-08 HLJ3DF - May 8, 22:25 UTCMay 9, 08:50 UTC10h 25m
2026-05-07 HLJ1AC - May 7, 22:40 UTCMay 8, 09:54 UTC11h 15m
2026-05-05 HLJ1AC - May 5, 22:01 UTCMay 6, 09:15 UTC11h 15m
2026-05-04 HLJ1AC - May 4, 13:15 UTCMay 5, 00:00 UTC10h 46m
2026-05-04 HLJ1EG - May 4, 00:15 UTCMay 4, 11:15 UTC11h 0m
2026-05-03 HLJ3AP - May 3, 09:45 UTCMay 3, 20:15 UTC10h 30m
2026-05-02 HLJ1EG - May 2, 22:40 UTCMay 3, 08:35 UTC9h 54m
2026-05-02 HLJ3AP - May 2, 10:00 UTCMay 2, 21:20 UTC11h 20m
2026-05-01 HLJ1EG - May 1, 22:20 UTCMay 2, 08:40 UTC10h 20m
2026-04-30 HLJ1AC - Apr 30, 22:35 UTCMay 1, 10:00 UTC11h 25m
2026-04-28 HLJ1AC BRQ → BRQ Apr 28, 22:10 UTCApr 29, 09:35 UTC11h 26m
2026-04-27 HLJ1AC - Apr 27, 13:15 UTCApr 28, 00:25 UTC11h 10m
2026-04-27 HLJ1EG - Apr 27, 00:10 UTCApr 27, 11:45 UTC11h 35m
2026-04-26 HLJ3AP - Apr 26, 09:50 UTCApr 26, 20:55 UTC11h 5m

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

Mode-S 4A2182 frequently asked

What is Mode-S code 4A2182?
4A2182 is an ICAO 24-bit transponder address. Allocated to Romania. Assigned to YR-HLB.
Where is Mode-S 4A2182 registered?
Mode-S code 4A2182 is allocated to Romania (RO). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4A2182 broadcasting right now?
Yes. Mode-S 4A2182 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4A2182, octal 22420602, decimal 4,858,242.
What flights does 4A2182 operate?
Mode-S 4A2182 has broadcast 14 distinct callsigns, including HLJ1AC, HLJ1EG, HLJ3DF, HLJ3AP, HLJ1AD.