sensors Mode-S transponder
511171
ICAO 24-bit transponder address · allocated to Estonia
Currently assigned to ES-MBB · AIRBUS A-320neo
- Hex
- 511171
- Octal
- 24210561
- Decimal
- 5,312,881
- Country
- EE
- Tail
- ES-MBB
- Type
- A20N
- Flights observed
- 158
- Distinct callsigns
- 20
- Country
- EE
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 511171 falls within the block assigned to Estonia (EE) by ICAO Annex 10, Volume III. Every aircraft registered in Estonia 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 |
|---|---|---|---|
| MBU6CZ | Marabu Airlines | 13 | 2026-06-03 |
| MBU2QV | Marabu Airlines | 13 | 2026-06-03 |
| MBU1RD | Marabu Airlines | 13 | 2026-06-01 |
| MBU7MX | Marabu Airlines | 12 | 2026-06-06 |
| MBU4HW | Marabu Airlines | 12 | 2026-06-06 |
| MBU2RH | Marabu Airlines | 10 | 2026-06-01 |
| MBU7PL | Marabu Airlines | 7 | 2026-06-02 |
| MBU6239 | Marabu Airlines | 7 | 2026-05-28 |
| MBU3WL | Marabu Airlines | 7 | 2026-06-06 |
| MBU9AG | Marabu Airlines | 6 | 2026-06-04 |
| MBU6238 | Marabu Airlines | 5 | 2026-06-07 |
| MBU5DF | Marabu Airlines | 5 | 2026-06-05 |
| MBU4AE | Marabu Airlines | 5 | 2026-06-05 |
| MBU8TN | Marabu Airlines | 4 | 2026-06-04 |
| MBU5SM | Marabu Airlines | 4 | 2026-05-21 |
| MBU2VF | Marabu Airlines | 4 | 2026-06-01 |
| MBU8DT | Marabu Airlines | 3 | 2026-06-02 |
| MBU3BP | Marabu Airlines | 3 | 2026-05-21 |
| MBU1LE | Marabu Airlines | 3 | 2026-06-03 |
| MBU8RP | Marabu Airlines | 2 | 2026-06-03 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-09 | MBU2AT | FUE → NUE | Jun 9, 17:05 UTC | Jun 9, 20:55 UTC | 3h 50m |
| 2026-06-09 | MBU3SD | NUE → FUE | Jun 9, 11:40 UTC | Jun 9, 15:50 UTC | 4h 10m |
| 2026-06-09 | MBU6VG | PMI → NUE | Jun 9, 08:20 UTC | Jun 9, 10:15 UTC | 1h 55m |
| 2026-06-09 | MBU3UM | HAM → PMI | Jun 9, 04:25 UTC | Jun 9, 07:00 UTC | 2h 35m |
| 2026-06-08 | MBU6506 | HAM → FNC | Jun 8, 17:55 UTC | Jun 8, 21:30 UTC | 3h 35m |
| 2026-06-08 | MBU9LP | HAM → FNC | Jun 8, 10:30 UTC | Jun 8, 16:05 UTC | 5h 35m |
| 2026-06-08 | MBU1TF | PMI → HAM | Jun 8, 06:30 UTC | Jun 8, 08:50 UTC | 2h 20m |
| 2026-06-08 | MBU5AW | NUE → PMI | Jun 8, 03:10 UTC | Jun 8, 04:55 UTC | 1h 45m |
| 2026-06-07 | MBU1XN | PMI → NUE | Jun 7, 19:50 UTC | Jun 7, 21:45 UTC | 1h 55m |
| 2026-06-07 | MBU8BX | - | Jun 7, 16:40 UTC | Jun 7, 18:35 UTC | 1h 55m |
| 2026-06-07 | MBU6238 | LEJ → HRG | Jun 7, 04:20 UTC | Jun 7, 14:40 UTC | 10h 20m |
| 2026-06-06 | MBU3WL | LEJ → LPA | Jun 6, 10:45 UTC | Jun 6, 21:25 UTC | 10h 40m |
| 2026-06-06 | MBU4HW | PMI → LEJ | Jun 6, 07:30 UTC | Jun 6, 09:34 UTC | 2h 5m |
| 2026-06-06 | MBU7MX | LEJ → PMI | Jun 6, 03:50 UTC | Jun 6, 06:00 UTC | 2h 10m |
| 2026-06-05 | MBU5DF | RHO → LEJ | Jun 5, 16:50 UTC | Jun 5, 19:50 UTC | 3h 0m |
| 2026-06-05 | MBU4AE | LEJ → RHO | Jun 5, 12:50 UTC | Jun 5, 15:35 UTC | 2h 45m |
| 2026-06-05 | MBU2YJ | KGS → LEJ | Jun 5, 07:55 UTC | Jun 5, 10:45 UTC | 2h 50m |
| 2026-06-05 | MBU8QA | LEJ → KGS | Jun 5, 03:50 UTC | Jun 5, 06:25 UTC | 2h 35m |
| 2026-06-04 | MBU8TN | TFS → LEJ | Jun 4, 18:05 UTC | Jun 4, 22:10 UTC | 4h 5m |
| 2026-06-04 | MBU9AG | LEJ → TFS | Jun 4, 11:50 UTC | Jun 4, 16:10 UTC | 4h 20m |
| 2026-06-04 | MBU9AG | LEJ → TFS | Jun 4, 11:15 UTC | Jun 4, 11:45 UTC | 30m |
| 2026-06-04 | MBU4HW | PMI → LEJ | Jun 4, 07:40 UTC | Jun 4, 09:50 UTC | 2h 10m |
| 2026-06-04 | MBU7MX | LEJ → PMI | Jun 4, 03:55 UTC | Jun 4, 06:00 UTC | 2h 5m |
| 2026-06-03 | MBU6CZ | PMI → LEJ | Jun 3, 18:20 UTC | Jun 3, 20:40 UTC | 2h 20m |
| 2026-06-03 | MBU2QV | LEJ → PMI | Jun 3, 15:00 UTC | Jun 3, 16:55 UTC | 1h 55m |
| 2026-06-03 | MBU1LE | CHQ → LEJ | Jun 3, 10:55 UTC | Jun 3, 13:35 UTC | 2h 40m |
| 2026-06-03 | MBU8RP | LEJ → CHQ | Jun 3, 06:05 UTC | Jun 3, 09:05 UTC | 3h 0m |
| 2026-06-02 | MBU6CZ | PMI → LEJ | Jun 2, 19:55 UTC | Jun 2, 21:55 UTC | 2h 0m |
| 2026-06-02 | MBU2QV | LEJ → PMI | Jun 2, 16:05 UTC | Jun 2, 18:35 UTC | 2h 30m |
| 2026-06-02 | MBU8DT | FUE → LEJ | Jun 2, 10:15 UTC | Jun 2, 14:35 UTC | 4h 20m |
| 2026-06-02 | MBU7PL | LEJ → FUE | Jun 2, 04:30 UTC | Jun 2, 09:00 UTC | 4h 30m |
| 2026-06-01 | MBU2VF | LPA → LEJ | Jun 1, 17:05 UTC | Jun 1, 21:30 UTC | 4h 25m |
| 2026-06-01 | MBU3WL | LEJ → LPA | Jun 1, 10:50 UTC | Jun 1, 14:55 UTC | 4h 5m |
| 2026-06-01 | MBU1RD | CFU → LEJ | Jun 1, 07:15 UTC | Jun 1, 09:15 UTC | 2h 0m |
| 2026-06-01 | MBU2RH | LEJ → CFU | Jun 1, 04:00 UTC | Jun 1, 05:50 UTC | 1h 50m |
| 2026-05-31 | MBU5DF | RHO → LEJ | May 31, 18:20 UTC | May 31, 21:35 UTC | 3h 15m |
| 2026-05-31 | MBU4AE | LEJ → RHO | May 31, 14:10 UTC | May 31, 16:50 UTC | 2h 40m |
| 2026-05-31 | MBU1LE | CHQ → LEJ | May 31, 09:10 UTC | May 31, 12:05 UTC | 2h 55m |
| 2026-05-30 | MBU8TN | TFS → LEJ | May 30, 17:35 UTC | May 30, 22:05 UTC | 4h 30m |
| 2026-05-30 | MBU9AG | LEJ → TFS | May 30, 11:40 UTC | May 30, 15:55 UTC | 4h 15m |
| 2026-05-30 | MBU1RD | CFU → LEJ | May 30, 08:10 UTC | May 30, 10:15 UTC | 2h 5m |
| 2026-05-30 | MBU2RH | LEJ → CFU | May 30, 04:45 UTC | May 30, 06:35 UTC | 1h 50m |
| 2026-05-29 | MBU6CZ | PMI → LEJ | May 29, 14:20 UTC | May 29, 16:35 UTC | 2h 15m |
| 2026-05-29 | MBU2QV | LEJ → PMI | May 29, 10:35 UTC | May 29, 12:50 UTC | 2h 15m |
| 2026-05-29 | MBU1RD | CFU → LEJ | May 29, 07:10 UTC | May 29, 09:15 UTC | 2h 5m |
| 2026-05-29 | MBU2RH | LEJ → CFU | May 29, 03:45 UTC | May 29, 05:30 UTC | 1h 45m |
| 2026-05-28 | MBU6CZ | PMI → LEJ | May 28, 19:40 UTC | May 28, 22:00 UTC | 2h 20m |
| 2026-05-28 | MBU2QV | LEJ → PMI | May 28, 16:10 UTC | May 28, 18:15 UTC | 2h 5m |
| 2026-05-28 | MBU6239 | HRG → LEJ | May 28, 04:20 UTC | May 28, 14:20 UTC | 10h 0m |
| 2026-05-27 | MBU6CZ | PMI → LEJ | May 27, 16:50 UTC | May 27, 19:00 UTC | 2h 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 ES-MBB page for operator, model, and routing details .