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
- Flights observed
- 69
- Distinct callsigns
- 14
- Country
- RO
- Last broadcast
- 6h ago
Current 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
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | HLJ3DF | - | May 29, 22:10 UTC | May 30, 00:25 UTC | 2h 15m |
| 2026-05-28 | HLJ1AC | BRQ → BRQ | May 28, 22:35 UTC | May 29, 10:00 UTC | 11h 25m |
| 2026-05-28 | HLJ810F | PRG → BRQ | May 28, 20:20 UTC | May 28, 20:50 UTC | 30m |
| 2026-05-28 | HLJ3BF | PRG → PRG | May 28, 06:40 UTC | May 28, 16:05 UTC | 9h 25m |
| 2026-05-27 | HLJ5AF | - | May 27, 15:30 UTC | May 27, 17:45 UTC | 2h 15m |
| 2026-05-27 | HLJ5GH | - | May 27, 12:00 UTC | May 27, 13:55 UTC | 1h 55m |
| 2026-05-27 | HLJ808F | - | May 27, 10:35 UTC | May 27, 11:00 UTC | 25m |
| 2026-05-26 | HLJ1AC | BRQ → BRQ | May 26, 22:05 UTC | May 27, 09:15 UTC | 11h 10m |
| 2026-05-25 | HLJ1AC | - | May 25, 13:45 UTC | May 26, 00:24 UTC | 10h 40m |
| 2026-05-25 | HLJ1EG | - | May 25, 01:55 UTC | May 25, 11:30 UTC | 9h 35m |
| 2026-05-24 | HLJ1AD | - | May 24, 10:00 UTC | May 24, 20:20 UTC | 10h 20m |
| 2026-05-23 | HLJ1EG | - | May 23, 23:35 UTC | May 24, 08:50 UTC | 9h 15m |
| 2026-05-23 | HLJ1EG | - | May 23, 12:40 UTC | May 24, 08:50 UTC | 20h 11m |
| 2026-05-23 | HLJ1EG | - | May 23, 10:35 UTC | May 24, 08:50 UTC | 22h 16m |
| 2026-05-23 | HLJ1EG | - | May 23, 10:10 UTC | May 24, 08:30 UTC | 22h 21m |
| 2026-05-22 | HLJ3DF | - | May 22, 22:05 UTC | May 23, 08:40 UTC | 10h 34m |
| 2026-05-21 | HLJ1AC | BRQ → BRQ | May 21, 22:30 UTC | May 22, 09:05 UTC | 10h 35m |
| 2026-05-21 | HLJ804F | PRG → BRQ | May 21, 19:50 UTC | May 21, 20:15 UTC | 25m |
| 2026-05-21 | HLJ4AB | PRG → PRG | May 21, 08:35 UTC | May 21, 18:10 UTC | 9h 35m |
| 2026-05-21 | HLJ803F | BRQ → PRG | May 21, 06:45 UTC | May 21, 07:10 UTC | 25m |
| 2026-05-19 | HLJ1AC | BRQ → BRQ | May 19, 22:20 UTC | May 20, 09:15 UTC | 10h 56m |
| 2026-05-18 | HLJ1AC | - | May 18, 13:10 UTC | May 19, 00:20 UTC | 11h 9m |
| 2026-05-18 | HLJ1EG | - | May 18, 00:15 UTC | May 18, 11:35 UTC | 11h 20m |
| 2026-05-17 | HLJ3AP | - | May 17, 10:35 UTC | May 17, 20:50 UTC | 10h 15m |
| 2026-05-16 | HLJ1EG | - | May 16, 22:45 UTC | May 17, 09:25 UTC | 10h 40m |
| 2026-05-16 | HLJ3AP | - | May 16, 10:20 UTC | May 16, 21:25 UTC | 11h 5m |
| 2026-05-15 | HLJ3DF | - | May 15, 22:20 UTC | May 16, 09:10 UTC | 10h 51m |
| 2026-05-14 | HLJ1AC | - | May 14, 22:45 UTC | May 15, 09:50 UTC | 11h 5m |
| 2026-05-12 | HLJ1AC | - | May 12, 22:10 UTC | May 13, 09:50 UTC | 11h 40m |
| 2026-05-11 | HLJ3AP | - | May 11, 13:30 UTC | May 11, 22:35 UTC | 9h 5m |
| 2026-05-11 | HLJ1EG | - | May 11, 10:05 UTC | May 11, 12:10 UTC | 2h 5m |
| 2026-05-11 | HLJ1EG | - | May 11, 08:25 UTC | May 11, 09:30 UTC | 1h 5m |
| 2026-05-11 | HLJ3DF | - | May 11, 00:10 UTC | May 11, 02:30 UTC | 2h 20m |
| 2026-05-10 | HLJ3AP | - | May 10, 10:19 UTC | May 10, 18:25 UTC | 8h 5m |
| 2026-05-09 | HLJ1EG | - | May 9, 22:45 UTC | May 10, 09:10 UTC | 10h 25m |
| 2026-05-09 | HLJ1AC | - | May 9, 10:10 UTC | May 9, 21:19 UTC | 11h 10m |
| 2026-05-08 | HLJ3DF | - | May 8, 22:25 UTC | May 9, 08:50 UTC | 10h 25m |
| 2026-05-07 | HLJ1AC | - | May 7, 22:40 UTC | May 8, 09:54 UTC | 11h 15m |
| 2026-05-05 | HLJ1AC | - | May 5, 22:01 UTC | May 6, 09:15 UTC | 11h 15m |
| 2026-05-04 | HLJ1AC | - | May 4, 13:15 UTC | May 5, 00:00 UTC | 10h 46m |
| 2026-05-04 | HLJ1EG | - | May 4, 00:15 UTC | May 4, 11:15 UTC | 11h 0m |
| 2026-05-03 | HLJ3AP | - | May 3, 09:45 UTC | May 3, 20:15 UTC | 10h 30m |
| 2026-05-02 | HLJ1EG | - | May 2, 22:40 UTC | May 3, 08:35 UTC | 9h 54m |
| 2026-05-02 | HLJ3AP | - | May 2, 10:00 UTC | May 2, 21:20 UTC | 11h 20m |
| 2026-05-01 | HLJ1EG | - | May 1, 22:20 UTC | May 2, 08:40 UTC | 10h 20m |
| 2026-04-30 | HLJ1AC | - | Apr 30, 22:35 UTC | May 1, 10:00 UTC | 11h 25m |
| 2026-04-28 | HLJ1AC | BRQ → BRQ | Apr 28, 22:10 UTC | Apr 29, 09:35 UTC | 11h 26m |
| 2026-04-27 | HLJ1AC | - | Apr 27, 13:15 UTC | Apr 28, 00:25 UTC | 11h 10m |
| 2026-04-27 | HLJ1EG | - | Apr 27, 00:10 UTC | Apr 27, 11:45 UTC | 11h 35m |
| 2026-04-26 | HLJ3AP | - | Apr 26, 09:50 UTC | Apr 26, 20:55 UTC | 11h 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 .