sensors Mode-S transponder
040101
ICAO 24-bit transponder address · allocated to Ethiopia
Currently assigned to ET-ASG · BOEING 787-8 Dreamliner
- Hex
- 040101
- Octal
- 01000401
- Decimal
- 262,401
- Country
- ET
- Tail
- ET-ASG
- Type
- B788
- Flights observed
- 105
- Distinct callsigns
- 20
- Country
- ET
- Last broadcast
- 14h ago
Last known position
Country allocation
The ICAO 24-bit address 040101 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 | 24 | 2026-05-03 |
| ETH644 | Ethiopian Airlines | 20 | 2026-05-03 |
| ETH715 | Ethiopian Airlines | 8 | 2026-05-27 |
| ETH714 | Ethiopian Airlines | 7 | 2026-05-27 |
| ETH909 | Ethiopian Airlines | 4 | 2026-05-21 |
| ETH8413 | - | 4 | 2026-04-19 |
| ETH741 | Ethiopian Airlines | 4 | 2026-05-18 |
| ETH740 | Ethiopian Airlines | 4 | 2026-05-18 |
| ETH737 | Ethiopian Airlines | 4 | 2026-05-20 |
| ETH736 | Ethiopian Airlines | 3 | 2026-05-20 |
| ETH8632 | - | 2 | 2026-05-23 |
| ETH8628 | - | 2 | 2026-05-22 |
| ETH859 | Ethiopian Airlines | 2 | 2026-04-28 |
| ETH725 | Ethiopian Airlines | 2 | 2026-05-08 |
| ETH724 | Ethiopian Airlines | 2 | 2026-05-08 |
| ETH908 | Ethiopian Airlines | 1 | 2026-04-17 |
| ETH907 | Ethiopian Airlines | 1 | 2026-04-17 |
| ETH8802 | - | 1 | 2026-05-14 |
| ETH8801 | Ethiopian Airlines | 1 | 2026-05-14 |
| ETH8631 | - | 1 | 2026-05-23 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | ETH681 | - | May 29, 08:30 UTC | May 29, 11:15 UTC | 2h 45m |
| 2026-05-29 | ETH680 | - | May 29, 00:30 UTC | May 29, 03:15 UTC | 2h 45m |
| 2026-05-27 | ETH715 | ARN → ADD | May 27, 20:25 UTC | May 28, 00:30 UTC | 4h 5m |
| 2026-05-27 | ETH715 | ARN → ADD | May 27, 18:00 UTC | May 27, 18:50 UTC | 50m |
| 2026-05-27 | ETH714 | ADD → ARN | May 27, 05:45 UTC | May 27, 06:29 UTC | 45m |
| 2026-05-27 | ETH714 | ADD → ARN | May 27, 00:00 UTC | May 27, 04:30 UTC | 4h 30m |
| 2026-05-23 | ETH8632 | - | May 23, 19:15 UTC | May 24, 15:35 UTC | 20h 20m |
| 2026-05-23 | ETH8632 | - | May 23, 11:45 UTC | May 23, 19:35 UTC | 7h 50m |
| 2026-05-23 | ETH8631 | - | May 23, 07:40 UTC | May 23, 08:30 UTC | 50m |
| 2026-05-22 | ETH8628 | - | May 22, 18:10 UTC | May 22, 22:30 UTC | 4h 20m |
| 2026-05-22 | ETH8628 | - | May 22, 00:35 UTC | May 22, 22:30 UTC | 21h 55m |
| 2026-05-21 | ETH909 | ADD → BKO | May 21, 20:55 UTC | May 22, 18:50 UTC | 21h 55m |
| 2026-05-21 | ETH909 | ADD → BKO | May 21, 18:10 UTC | May 21, 18:45 UTC | 35m |
| 2026-05-20 | ETH737 | MXP → ADD | May 20, 22:20 UTC | May 21, 18:45 UTC | 20h 25m |
| 2026-05-20 | ETH737 | MXP → ADD | May 20, 21:50 UTC | May 21, 18:45 UTC | 20h 55m |
| 2026-05-20 | ETH736 | MXP → ZRH | May 20, 01:05 UTC | May 20, 04:20 UTC | 3h 15m |
| 2026-05-18 | ETH741 | MAD → ADD | May 18, 22:00 UTC | May 19, 00:50 UTC | 2h 50m |
| 2026-05-18 | ETH741 | MAD → ADD | May 18, 19:15 UTC | May 18, 20:00 UTC | 45m |
| 2026-05-18 | ETH740 | ADD → MAD | May 18, 05:35 UTC | May 18, 06:25 UTC | 50m |
| 2026-05-17 | ETH740 | ADD → MAD | May 17, 14:10 UTC | May 18, 04:00 UTC | 13h 50m |
| 2026-05-15 | ETH687 | DEL → ADD | May 15, 21:50 UTC | May 15, 23:35 UTC | 1h 45m |
| 2026-05-15 | ETH688 | ADD → DEL | May 15, 06:05 UTC | May 15, 19:40 UTC | 13h 34m |
| 2026-05-14 | ETH8801 | KTM → ADD | May 14, 23:10 UTC | May 15, 03:25 UTC | 4h 15m |
| 2026-05-14 | ETH8802 | - | May 14, 15:20 UTC | May 14, 20:10 UTC | 4h 50m |
| 2026-05-13 | ETH737 | MXP → ADD | May 13, 21:50 UTC | May 14, 12:45 UTC | 14h 55m |
| 2026-05-13 | ETH737 | MXP → ADD | May 13, 19:20 UTC | May 13, 19:50 UTC | 30m |
| 2026-05-13 | ETH736 | MXP → ZRH | May 13, 05:30 UTC | May 13, 06:10 UTC | 40m |
| 2026-05-13 | ETH736 | MXP → ZRH | May 13, 01:05 UTC | May 13, 04:15 UTC | 3h 10m |
| 2026-05-11 | ETH741 | MAD → ADD | May 11, 21:30 UTC | May 11, 22:35 UTC | 1h 4m |
| 2026-05-11 | ETH741 | MAD → ADD | May 11, 19:00 UTC | May 11, 19:45 UTC | 45m |
| 2026-05-11 | ETH740 | ADD → MAD | May 11, 06:05 UTC | May 11, 07:10 UTC | 1h 5m |
| 2026-05-10 | ETH740 | ADD → MAD | May 10, 13:55 UTC | May 11, 04:30 UTC | 14h 35m |
| 2026-05-08 | ETH725 | VIE → ADD | May 8, 20:20 UTC | May 8, 23:15 UTC | 2h 55m |
| 2026-05-08 | ETH725 | VIE → ADD | May 8, 17:45 UTC | May 8, 19:05 UTC | 1h 20m |
| 2026-05-08 | ETH724 | VIE → BRU | May 8, 05:29 UTC | May 8, 06:45 UTC | 1h 15m |
| 2026-05-08 | ETH724 | VIE → BRU | May 8, 01:45 UTC | May 8, 04:19 UTC | 2h 35m |
| 2026-05-06 | ETH715 | ARN → ADD | May 6, 19:50 UTC | May 6, 23:15 UTC | 3h 25m |
| 2026-05-06 | ETH715 | ARN → ADD | May 6, 17:50 UTC | May 6, 18:30 UTC | 40m |
| 2026-05-06 | ETH714 | ADD → ARN | May 6, 06:30 UTC | May 6, 07:15 UTC | 45m |
| 2026-05-05 | ETH714 | ADD → ARN | May 5, 14:00 UTC | May 6, 04:25 UTC | 14h 25m |
| 2026-05-03 | ETH645 | HKG → ADD | May 3, 18:40 UTC | May 3, 22:09 UTC | 3h 30m |
| 2026-05-03 | ETH645 | HKG → ADD | May 3, 16:55 UTC | May 3, 17:10 UTC | 15m |
| 2026-05-03 | ETH645 | HKG → ADD | May 3, 13:40 UTC | May 3, 15:15 UTC | 1h 35m |
| 2026-05-03 | ETH644 | HKG → MNL | May 3, 09:00 UTC | May 3, 10:45 UTC | 1h 45m |
| 2026-05-03 | ETH644 | HKG → MNL | May 3, 01:05 UTC | May 3, 06:40 UTC | 5h 34m |
| 2026-05-01 | ETH645 | HKG → ADD | May 1, 18:45 UTC | May 1, 22:15 UTC | 3h 30m |
| 2026-05-01 | ETH645 | HKG → ADD | May 1, 17:05 UTC | May 1, 17:15 UTC | 10m |
| 2026-05-01 | ETH645 | HKG → ADD | May 1, 15:20 UTC | May 1, 15:40 UTC | 20m |
| 2026-05-01 | ETH645 | HKG → ADD | May 1, 13:55 UTC | May 1, 14:30 UTC | 35m |
| 2026-05-01 | ETH644 | HKG → MNL | May 1, 08:45 UTC | May 1, 10:25 UTC | 1h 40m |
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-ASG page for operator, model, and routing details .