sensors Mode-S transponder
4520EB
ICAO 24-bit transponder address · allocated to Bulgaria
Currently assigned to LZ-DBT · AIRBUS A-320
- Hex
- 4520EB
- Octal
- 21220353
- Decimal
- 4,530,411
- Country
- BG
- Tail
- LZ-DBT
- Type
- A320
- Flights observed
- 68
- Distinct callsigns
- 20
- Country
- BG
- Last broadcast
- 18h ago
Last known position
Country allocation
The ICAO 24-bit address 4520EB 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 20 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| UBD438 | United Airways | 17 | 2026-06-02 |
| UBD437 | United Airways | 8 | 2026-05-23 |
| UBD424 | United Airways | 7 | 2026-05-29 |
| UBD496 | United Airways | 5 | 2026-05-31 |
| UBD423 | United Airways | 5 | 2026-05-29 |
| UBD432 | United Airways | 4 | 2026-05-12 |
| UBD761 | United Airways | 3 | 2026-06-01 |
| UBD495 | United Airways | 3 | 2026-05-31 |
| UBD431 | United Airways | 3 | 2026-05-12 |
| UBD762 | United Airways | 2 | 2026-06-01 |
| UBD115 | United Airways | 2 | 2026-05-01 |
| UBD771 | - | 1 | 2026-05-28 |
| UBD482 | United Airways | 1 | 2026-05-02 |
| UBD446 | United Airways | 1 | 2026-04-21 |
| UBD445 | United Airways | 1 | 2026-04-20 |
| UBD442 | United Airways | 1 | 2026-04-30 |
| UBD441 | United Airways | 1 | 2026-04-30 |
| UBD435 | United Airways | 1 | 2026-05-25 |
| UBD116 | United Airways | 1 | 2026-05-01 |
| BGH6001 | - | 1 | 2026-04-17 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | UBD438 | DUS → EBL | Jun 2, 19:40 UTC | Jun 2, 23:05 UTC | 3h 25m |
| 2026-06-01 | UBD762 | IST → EBL | Jun 1, 20:05 UTC | Jun 1, 20:35 UTC | 30m |
| 2026-06-01 | UBD761 | EBL → IST | Jun 1, 17:25 UTC | Jun 1, 18:25 UTC | 1h 0m |
| 2026-05-31 | UBD496 | HAJ → EBL | May 31, 22:20 UTC | Jun 1, 08:30 UTC | 10h 10m |
| 2026-05-31 | UBD495 | EBL → HAJ | May 31, 09:40 UTC | May 31, 20:45 UTC | 11h 5m |
| 2026-05-30 | UBD762 | IST → EBL | May 30, 20:05 UTC | May 30, 20:35 UTC | 30m |
| 2026-05-30 | UBD438 | DUS → EBL | May 30, 10:25 UTC | May 30, 18:25 UTC | 8h 0m |
| 2026-05-29 | UBD424 | AMS → EBL | May 29, 21:25 UTC | May 30, 08:10 UTC | 10h 45m |
| 2026-05-29 | UBD423 | EBL → AMS | May 29, 05:25 UTC | May 29, 08:10 UTC | 2h 45m |
| 2026-05-28 | UBD771 | - | May 28, 18:45 UTC | May 28, 19:10 UTC | 25m |
| 2026-05-27 | UBD438 | DUS → EBL | May 27, 09:45 UTC | May 27, 12:00 UTC | 2h 15m |
| 2026-05-26 | UBD761 | EBL → IST | May 26, 18:55 UTC | May 26, 19:05 UTC | 10m |
| 2026-05-26 | UBD424 | AMS → EBL | May 26, 11:00 UTC | May 26, 14:40 UTC | 3h 40m |
| 2026-05-26 | UBD423 | EBL → AMS | May 26, 07:05 UTC | May 26, 08:50 UTC | 1h 45m |
| 2026-05-25 | UBD435 | EBL → CGN | May 25, 17:25 UTC | May 25, 19:54 UTC | 2h 29m |
| 2026-05-24 | UBD438 | DUS → EBL | May 24, 18:35 UTC | May 25, 08:15 UTC | 13h 40m |
| 2026-05-23 | UBD437 | EBL → DUS | May 23, 21:50 UTC | May 24, 08:20 UTC | 10h 30m |
| 2026-05-23 | UBD438 | DUS → EBL | May 23, 09:50 UTC | May 23, 13:25 UTC | 3h 35m |
| 2026-05-22 | UBD424 | AMS → EBL | May 22, 20:20 UTC | May 23, 07:45 UTC | 11h 24m |
| 2026-05-21 | UBD423 | EBL → AMS | May 21, 18:35 UTC | May 22, 08:15 UTC | 13h 40m |
| 2026-05-20 | UBD437 | EBL → DUS | May 20, 20:05 UTC | May 21, 09:10 UTC | 13h 5m |
| 2026-05-20 | UBD761 | EBL → IST | May 20, 18:35 UTC | May 20, 18:45 UTC | 10m |
| 2026-05-20 | UBD438 | DUS → EBL | May 20, 10:35 UTC | May 20, 13:10 UTC | 2h 35m |
| 2026-05-19 | UBD438 | DUS → EBL | May 19, 17:35 UTC | May 20, 07:35 UTC | 14h 1m |
| 2026-05-18 | UBD496 | HAJ → EBL | May 18, 22:15 UTC | May 19, 08:30 UTC | 10h 15m |
| 2026-05-17 | UBD438 | DUS → EBL | May 17, 09:50 UTC | May 17, 20:45 UTC | 10h 55m |
| 2026-05-17 | UBD437 | EBL → DUS | May 17, 05:20 UTC | May 17, 08:05 UTC | 2h 45m |
| 2026-05-16 | UBD438 | DUS → EBL | May 16, 09:51 UTC | May 16, 20:10 UTC | 10h 20m |
| 2026-05-15 | UBD424 | AMS → EBL | May 15, 20:25 UTC | May 15, 23:05 UTC | 2h 40m |
| 2026-05-14 | UBD423 | EBL → AMS | May 14, 19:35 UTC | May 15, 07:55 UTC | 12h 20m |
| 2026-05-13 | UBD438 | DUS → EBL | May 13, 19:35 UTC | May 14, 08:00 UTC | 12h 25m |
| 2026-05-12 | UBD432 | CPH → EBL | May 12, 22:10 UTC | May 13, 08:30 UTC | 10h 20m |
| 2026-05-12 | UBD431 | EBL → CPH | May 12, 20:30 UTC | May 12, 20:45 UTC | 15m |
| 2026-05-12 | UBD438 | DUS → EBL | May 12, 10:05 UTC | May 12, 13:25 UTC | 3h 20m |
| 2026-05-10 | UBD438 | DUS → EBL | May 10, 18:25 UTC | May 11, 08:10 UTC | 13h 45m |
| 2026-05-09 | UBD437 | EBL → DUS | May 9, 18:50 UTC | May 10, 07:50 UTC | 13h 0m |
| 2026-05-08 | UBD437 | EBL → DUS | May 8, 12:49 UTC | May 9, 08:05 UTC | 19h 15m |
| 2026-05-08 | UBD424 | AMS → EBL | May 8, 10:49 UTC | May 9, 08:05 UTC | 21h 15m |
| 2026-05-08 | UBD424 | AMS → EBL | May 8, 10:29 UTC | May 9, 08:05 UTC | 21h 35m |
| 2026-05-07 | UBD438 | DUS → EBL | May 7, 18:30 UTC | May 8, 08:34 UTC | 14h 4m |
| 2026-05-06 | UBD496 | HAJ → EBL | May 6, 21:25 UTC | May 7, 08:15 UTC | 10h 50m |
| 2026-05-06 | UBD495 | EBL → HAJ | May 6, 10:01 UTC | May 6, 20:05 UTC | 10h 4m |
| 2026-05-05 | UBD432 | CPH → EBL | May 5, 19:40 UTC | May 6, 08:30 UTC | 12h 50m |
| 2026-05-05 | UBD438 | DUS → EBL | May 5, 07:35 UTC | May 5, 11:00 UTC | 3h 25m |
| 2026-05-03 | UBD438 | DUS → EBL | May 3, 07:20 UTC | May 3, 17:54 UTC | 10h 35m |
| 2026-05-02 | UBD482 | STR → EBL | May 2, 05:35 UTC | May 2, 07:50 UTC | 2h 15m |
| 2026-05-01 | UBD116 | LGW → EBL | May 1, 17:00 UTC | May 2, 04:05 UTC | 11h 5m |
| 2026-05-01 | UBD115 | RJK → LGW | May 1, 13:10 UTC | May 1, 14:55 UTC | 1h 45m |
| 2026-05-01 | UBD115 | RJK → LGW | May 1, 09:45 UTC | May 1, 11:20 UTC | 1h 35m |
| 2026-04-30 | UBD442 | MUC → EBL | Apr 30, 10:05 UTC | Apr 30, 12:05 UTC | 2h 0m |
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-DBT page for operator, model, and routing details .