sensors Mode-S transponder
452087
ICAO 24-bit transponder address · allocated to Bulgaria
Currently assigned to LZ-BHM · AIRBUS A-320
- Hex
- 452087
- Octal
- 21220207
- Decimal
- 4,530,311
- Country
- BG
- Tail
- LZ-BHM
- Type
- A320
- Flights observed
- 83
- Distinct callsigns
- 19
- Country
- BG
- Last broadcast
- 4h ago
Last known position
Country allocation
The ICAO 24-bit address 452087 falls within the block assigned to Bulgaria (BG) by ICAO Annex 10, Volume III. Every aircraft registered in Bulgaria 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 19 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UBD438 | United Airways | 16 | 2026-05-26 |
| UBD437 | United Airways | 10 | 2026-05-25 |
| UBD115 | United Airways | 8 | 2026-05-29 |
| UBD496 | United Airways | 6 | 2026-05-24 |
| UBD482 | United Airways | 6 | 2026-05-23 |
| UBD495 | United Airways | 5 | 2026-05-27 |
| UBD761 | United Airways | 4 | 2026-05-25 |
| UBD442 | United Airways | 4 | 2026-05-28 |
| UBD116 | United Airways | 4 | 2026-05-29 |
| UBD481 | United Airways | 3 | 2026-04-24 |
| UBD446 | United Airways | 3 | 2026-05-18 |
| UBD432 | United Airways | 3 | 2026-05-26 |
| UBD762 | United Airways | 2 | 2026-05-24 |
| UBD445 | United Airways | 2 | 2026-05-11 |
| UBD441 | United Airways | 2 | 2026-05-27 |
| UBD431 | United Airways | 2 | 2026-05-19 |
| UBD6002 | - | 1 | 2026-04-20 |
| UBD423 | United Airways | 1 | 2026-05-05 |
| BGH6001 | - | 1 | 2026-04-18 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | UBD116 | LGW → EBL | May 29, 17:55 UTC | May 29, 21:10 UTC | 3h 15m |
| 2026-05-29 | UBD115 | RJK → LGW | May 29, 13:40 UTC | May 29, 15:35 UTC | 1h 55m |
| 2026-05-29 | UBD115 | RJK → LGW | May 29, 00:55 UTC | May 29, 11:30 UTC | 10h 35m |
| 2026-05-28 | UBD442 | MUC → EBL | May 28, 09:40 UTC | May 28, 18:10 UTC | 8h 30m |
| 2026-05-27 | UBD441 | EBL → MUC | May 27, 21:10 UTC | May 28, 07:45 UTC | 10h 35m |
| 2026-05-27 | UBD495 | EBL → HAJ | May 27, 09:25 UTC | May 27, 19:50 UTC | 10h 25m |
| 2026-05-26 | UBD432 | CPH → EBL | May 26, 21:49 UTC | May 27, 07:40 UTC | 9h 50m |
| 2026-05-26 | UBD438 | DUS → EBL | May 26, 09:55 UTC | May 26, 20:24 UTC | 10h 30m |
| 2026-05-25 | UBD437 | EBL → DUS | May 25, 20:40 UTC | May 26, 07:49 UTC | 11h 10m |
| 2026-05-25 | UBD761 | EBL → IST | May 25, 07:20 UTC | May 25, 07:30 UTC | 10m |
| 2026-05-24 | UBD496 | HAJ → EBL | May 24, 23:00 UTC | May 24, 23:46 UTC | 46m |
| 2026-05-24 | UBD495 | EBL → HAJ | May 24, 18:15 UTC | May 24, 20:50 UTC | 2h 35m |
| 2026-05-24 | UBD762 | IST → EBL | May 24, 10:35 UTC | May 24, 10:45 UTC | 10m |
| 2026-05-23 | UBD761 | EBL → IST | May 23, 17:15 UTC | May 23, 17:25 UTC | 10m |
| 2026-05-23 | UBD482 | STR → EBL | May 23, 06:05 UTC | May 23, 16:30 UTC | 10h 25m |
| 2026-05-22 | UBD116 | LGW → EBL | May 22, 17:55 UTC | May 23, 04:55 UTC | 10h 59m |
| 2026-05-22 | UBD115 | RJK → LGW | May 22, 13:15 UTC | May 22, 15:10 UTC | 1h 55m |
| 2026-05-22 | UBD115 | RJK → LGW | May 22, 01:15 UTC | May 22, 10:55 UTC | 9h 40m |
| 2026-05-21 | UBD761 | EBL → IST | May 21, 18:45 UTC | May 21, 18:55 UTC | 10m |
| 2026-05-21 | UBD442 | MUC → EBL | May 21, 10:45 UTC | May 21, 18:00 UTC | 7h 15m |
| 2026-05-20 | UBD496 | HAJ → EBL | May 20, 23:30 UTC | May 21, 09:10 UTC | 9h 40m |
| 2026-05-20 | UBD482 | STR → EBL | May 20, 11:45 UTC | May 20, 14:05 UTC | 2h 20m |
| 2026-05-19 | UBD432 | CPH → EBL | May 19, 21:50 UTC | May 20, 07:40 UTC | 9h 51m |
| 2026-05-19 | UBD431 | EBL → CPH | May 19, 10:45 UTC | May 19, 20:25 UTC | 9h 40m |
| 2026-05-18 | UBD446 | BER → EBL | May 18, 10:05 UTC | May 18, 12:55 UTC | 2h 50m |
| 2026-05-17 | UBD762 | IST → EBL | May 17, 22:10 UTC | May 17, 22:20 UTC | 10m |
| 2026-05-16 | UBD761 | EBL → IST | May 16, 18:55 UTC | May 16, 19:05 UTC | 10m |
| 2026-05-16 | UBD482 | STR → EBL | May 16, 06:01 UTC | May 16, 08:16 UTC | 2h 15m |
| 2026-05-15 | UBD116 | LGW → EBL | May 15, 17:30 UTC | May 16, 04:30 UTC | 11h 0m |
| 2026-05-15 | UBD115 | RJK → LGW | May 15, 13:35 UTC | May 15, 15:40 UTC | 2h 4m |
| 2026-05-15 | UBD115 | RJK → LGW | May 15, 09:55 UTC | May 15, 11:50 UTC | 1h 55m |
| 2026-05-14 | UBD442 | MUC → EBL | May 14, 09:15 UTC | May 14, 16:10 UTC | 6h 55m |
| 2026-05-13 | UBD496 | HAJ → EBL | May 13, 21:20 UTC | May 14, 07:25 UTC | 10h 5m |
| 2026-05-13 | UBD482 | STR → EBL | May 13, 09:30 UTC | May 13, 19:50 UTC | 10h 20m |
| 2026-05-11 | UBD446 | BER → EBL | May 11, 10:15 UTC | May 11, 12:30 UTC | 2h 15m |
| 2026-05-11 | UBD445 | EBL → BER | May 11, 05:50 UTC | May 11, 08:00 UTC | 2h 10m |
| 2026-05-10 | UBD496 | HAJ → EBL | May 10, 09:15 UTC | May 10, 11:25 UTC | 2h 10m |
| 2026-05-09 | UBD495 | EBL → HAJ | May 9, 21:19 UTC | May 10, 07:45 UTC | 10h 25m |
| 2026-05-09 | UBD482 | STR → EBL | May 9, 05:50 UTC | May 9, 19:45 UTC | 13h 55m |
| 2026-05-08 | UBD116 | LGW → EBL | May 8, 17:30 UTC | May 9, 04:30 UTC | 11h 0m |
| 2026-05-08 | UBD115 | RJK → LGW | May 8, 14:00 UTC | May 8, 15:50 UTC | 1h 50m |
| 2026-05-08 | UBD115 | RJK → LGW | May 8, 02:19 UTC | May 8, 10:39 UTC | 8h 20m |
| 2026-05-07 | UBD442 | MUC → EBL | May 7, 09:50 UTC | May 7, 11:50 UTC | 2h 0m |
| 2026-05-07 | UBD441 | EBL → MUC | May 7, 05:05 UTC | May 7, 07:10 UTC | 2h 5m |
| 2026-05-06 | UBD438 | DUS → EBL | May 6, 10:05 UTC | May 6, 12:35 UTC | 2h 30m |
| 2026-05-05 | UBD437 | EBL → DUS | May 5, 13:50 UTC | May 6, 08:01 UTC | 18h 10m |
| 2026-05-05 | UBD437 | EBL → DUS | May 5, 11:50 UTC | May 6, 08:01 UTC | 20h 10m |
| 2026-05-05 | UBD437 | EBL → DUS | May 5, 11:15 UTC | May 6, 08:01 UTC | 20h 45m |
| 2026-05-05 | UBD423 | EBL → AMS | May 5, 05:05 UTC | May 5, 08:15 UTC | 3h 10m |
| 2026-05-04 | UBD446 | BER → EBL | May 4, 10:00 UTC | May 4, 13:10 UTC | 3h 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 LZ-BHM page for operator, model, and routing details .