sensors Mode-S transponder
040142
ICAO 24-bit transponder address · allocated to Ethiopia
Currently assigned to ET-AUQ · BOEING 787-9 Dreamliner
- Hex
- 040142
- Octal
- 01000502
- Decimal
- 262,466
- Country
- ET
- Tail
- ET-AUQ
- Type
- B789
- Flights observed
- 110
- Distinct callsigns
- 20
- Country
- ET
- Last broadcast
- 7h ago
Last known position
Country allocation
The ICAO 24-bit address 040142 falls within the block assigned to Ethiopia (ET) by ICAO Annex 10, Volume III. Every aircraft registered in Ethiopia 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 |
|---|---|---|---|
| ETH645 | Ethiopian Airlines | 11 | 2026-05-29 |
| ETH644 | Ethiopian Airlines | 10 | 2026-05-29 |
| ETH638 | Ethiopian Airlines | 7 | 2026-05-07 |
| ETH609 | Ethiopian Airlines | 7 | 2026-05-20 |
| ETH907 | Ethiopian Airlines | 6 | 2026-05-15 |
| ETH731 | Ethiopian Airlines | 6 | 2026-05-26 |
| ETH608 | Ethiopian Airlines | 5 | 2026-05-19 |
| ETH844 | Ethiopian Airlines | 4 | 2026-05-25 |
| ETH741 | Ethiopian Airlines | 4 | 2026-04-16 |
| ETH740 | Ethiopian Airlines | 4 | 2026-04-16 |
| ETH725 | Ethiopian Airlines | 4 | 2026-05-22 |
| ETH724 | Ethiopian Airlines | 4 | 2026-05-22 |
| ETH639 | Ethiopian Airlines | 4 | 2026-05-07 |
| ETH730 | Ethiopian Airlines | 3 | 2026-05-26 |
| ETH628 | Ethiopian Airlines | 3 | 2026-04-28 |
| ETH923 | Ethiopian Airlines | 2 | 2026-04-15 |
| ETH909 | Ethiopian Airlines | 2 | 2026-05-05 |
| ETH846 | Ethiopian Airlines | 2 | 2026-05-12 |
| ETH845 | Ethiopian Airlines | 2 | 2026-05-10 |
| ETH716 | Ethiopian Airlines | 2 | 2026-04-18 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | ETH645 | HKG → ADD | May 29, 17:40 UTC | May 29, 22:40 UTC | 5h 0m |
| 2026-05-29 | ETH645 | HKG → ADD | May 29, 16:50 UTC | May 29, 17:05 UTC | 15m |
| 2026-05-29 | ETH645 | HKG → ADD | May 29, 13:15 UTC | May 29, 15:05 UTC | 1h 50m |
| 2026-05-29 | ETH644 | HKG → MNL | May 29, 08:25 UTC | May 29, 10:15 UTC | 1h 50m |
| 2026-05-29 | ETH644 | HKG → MNL | May 29, 06:25 UTC | May 29, 06:55 UTC | 30m |
| 2026-05-29 | ETH644 | HKG → MNL | May 29, 01:10 UTC | May 29, 04:20 UTC | 3h 10m |
| 2026-05-26 | ETH731 | DUB → ADD | May 26, 20:05 UTC | May 26, 22:20 UTC | 2h 15m |
| 2026-05-26 | ETH731 | DUB → ADD | May 26, 17:39 UTC | May 26, 18:30 UTC | 50m |
| 2026-05-26 | ETH730 | VIE → BRU | May 26, 05:10 UTC | May 26, 06:04 UTC | 55m |
| 2026-05-26 | ETH730 | VIE → BRU | May 26, 01:14 UTC | May 26, 03:55 UTC | 2h 40m |
| 2026-05-25 | ETH844 | CPT → ADD | May 25, 12:25 UTC | May 25, 12:35 UTC | 10m |
| 2026-05-24 | ETH645 | HKG → ADD | May 24, 18:30 UTC | May 25, 11:05 UTC | 16h 35m |
| 2026-05-24 | ETH645 | HKG → ADD | May 24, 16:50 UTC | May 24, 17:05 UTC | 15m |
| 2026-05-24 | ETH645 | HKG → ADD | May 24, 15:00 UTC | May 24, 15:20 UTC | 20m |
| 2026-05-24 | ETH645 | HKG → ADD | May 24, 13:30 UTC | May 24, 14:15 UTC | 45m |
| 2026-05-24 | ETH644 | HKG → MNL | May 24, 08:40 UTC | May 24, 10:30 UTC | 1h 50m |
| 2026-05-24 | ETH644 | HKG → MNL | May 24, 06:30 UTC | May 24, 07:00 UTC | 30m |
| 2026-05-24 | ETH644 | HKG → MNL | May 24, 01:20 UTC | May 24, 04:30 UTC | 3h 10m |
| 2026-05-23 | ETH844 | CPT → ADD | May 23, 12:10 UTC | May 23, 12:25 UTC | 15m |
| 2026-05-22 | ETH725 | VIE → ADD | May 22, 20:40 UTC | May 23, 10:50 UTC | 14h 9m |
| 2026-05-22 | ETH725 | VIE → ADD | May 22, 17:45 UTC | May 22, 19:00 UTC | 1h 15m |
| 2026-05-22 | ETH724 | VIE → BRU | May 22, 05:20 UTC | May 22, 06:45 UTC | 1h 25m |
| 2026-05-21 | ETH724 | VIE → BRU | May 21, 09:20 UTC | May 22, 03:55 UTC | 18h 35m |
| 2026-05-20 | ETH609 | HKG → BKK | May 20, 21:40 UTC | May 21, 14:50 UTC | 17h 10m |
| 2026-05-20 | ETH609 | HKG → BKK | May 20, 19:10 UTC | May 20, 19:25 UTC | 15m |
| 2026-05-20 | ETH609 | HKG → BKK | May 20, 06:10 UTC | May 20, 17:35 UTC | 11h 25m |
| 2026-05-19 | ETH608 | BKK → HKG | May 19, 13:45 UTC | May 20, 04:35 UTC | 14h 50m |
| 2026-05-19 | ETH913 | ADD → ADD | May 19, 10:05 UTC | May 19, 10:30 UTC | 25m |
| 2026-05-17 | ETH611 | BOM → ADD | May 17, 22:55 UTC | May 17, 23:25 UTC | 30m |
| 2026-05-17 | ETH640 | ADD → BOM | May 17, 05:55 UTC | May 17, 20:05 UTC | 14h 10m |
| 2026-05-17 | ETH610 | ADD → BOM | May 17, 01:25 UTC | May 17, 02:20 UTC | 55m |
| 2026-05-15 | ETH907 | BKO → DSS | May 15, 08:35 UTC | May 15, 09:05 UTC | 30m |
| 2026-05-15 | ETH907 | BKO → DSS | May 15, 05:15 UTC | May 15, 06:00 UTC | 45m |
| 2026-05-13 | ETH907 | BKO → DSS | May 13, 07:55 UTC | May 13, 08:25 UTC | 30m |
| 2026-05-13 | ETH907 | BKO → DSS | May 13, 05:00 UTC | May 13, 05:45 UTC | 45m |
| 2026-05-12 | ETH846 | CPT → ADD | May 12, 13:00 UTC | May 12, 13:10 UTC | 10m |
| 2026-05-11 | ETH847 | ADD → CPT | May 11, 21:50 UTC | May 12, 11:40 UTC | 13h 50m |
| 2026-05-11 | ETH609 | HKG → BKK | May 11, 19:10 UTC | May 11, 19:25 UTC | 15m |
| 2026-05-11 | ETH609 | HKG → BKK | May 11, 06:20 UTC | May 11, 17:35 UTC | 11h 16m |
| 2026-05-11 | ETH608 | BKK → HKG | May 11, 04:20 UTC | May 11, 04:45 UTC | 25m |
| 2026-05-10 | ETH608 | BKK → HKG | May 10, 13:44 UTC | May 11, 01:55 UTC | 12h 10m |
| 2026-05-10 | ETH844 | CPT → ADD | May 10, 12:30 UTC | May 10, 12:44 UTC | 15m |
| 2026-05-10 | ETH845 | ADD → CPT | May 10, 10:45 UTC | May 10, 11:05 UTC | 20m |
| 2026-05-09 | ETH725 | VIE → ADD | May 9, 20:15 UTC | May 9, 22:25 UTC | 2h 10m |
| 2026-05-09 | ETH725 | VIE → ADD | May 9, 17:45 UTC | May 9, 19:00 UTC | 1h 15m |
| 2026-05-09 | ETH724 | VIE → BRU | May 9, 05:25 UTC | May 9, 06:40 UTC | 1h 15m |
| 2026-05-08 | ETH724 | VIE → BRU | May 8, 13:45 UTC | May 9, 04:00 UTC | 14h 15m |
| 2026-05-07 | ETH639 | KUL → SIN | May 7, 18:35 UTC | May 8, 13:45 UTC | 19h 10m |
| 2026-05-07 | ETH639 | KUL → SIN | May 7, 15:25 UTC | May 7, 15:50 UTC | 25m |
| 2026-05-07 | ETH638 | ADD → SIN | May 7, 08:40 UTC | May 7, 09:10 UTC | 30m |
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 ET-AUQ page for operator, model, and routing details .