sensors Mode-S transponder
040103
ICAO 24-bit transponder address · allocated to Ethiopia
Currently assigned to ET-ASI · BOEING 787-8 Dreamliner
- Hex
- 040103
- Octal
- 01000403
- Decimal
- 262,403
- Country
- ET
- Tail
- ET-ASI
- Type
- B788
- Flights observed
- 78
- Distinct callsigns
- 20
- Country
- ET
- Last broadcast
- 1h ago
Last known position
Country allocation
The ICAO 24-bit address 040103 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 |
|---|---|---|---|
| UGD111 | - | 11 | 2026-05-03 |
| UGD110 | - | 11 | 2026-05-03 |
| ETH725 | Ethiopian Airlines | 6 | 2026-05-27 |
| ETH724 | Ethiopian Airlines | 6 | 2026-05-27 |
| ETH714 | Ethiopian Airlines | 6 | 2026-06-02 |
| UGD430 | - | 5 | 2026-05-02 |
| ETH741 | Ethiopian Airlines | 5 | 2026-05-30 |
| ETH715 | Ethiopian Airlines | 5 | 2026-06-02 |
| ETH740 | Ethiopian Airlines | 4 | 2026-05-30 |
| UGD431 | - | 3 | 2026-04-30 |
| ETH645 | Ethiopian Airlines | 3 | 2026-05-07 |
| ETH644 | Ethiopian Airlines | 3 | 2026-05-07 |
| ETH737 | Ethiopian Airlines | 2 | 2026-05-23 |
| ETH736 | Ethiopian Airlines | 2 | 2026-05-23 |
| ETH909 | Ethiopian Airlines | 1 | 2026-05-31 |
| ETH845 | Ethiopian Airlines | 1 | 2026-05-19 |
| ETH688 | Ethiopian Airlines | 1 | 2026-05-13 |
| ETH687 | Ethiopian Airlines | 1 | 2026-05-13 |
| ETH686 | Ethiopian Airlines | 1 | 2026-05-13 |
| ETH680 | - | 1 | 2026-05-06 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | ETH715 | ARN → ADD | Jun 2, 18:10 UTC | Jun 2, 18:45 UTC | 35m |
| 2026-06-02 | ETH714 | ADD → ARN | Jun 2, 05:55 UTC | Jun 2, 06:40 UTC | 45m |
| 2026-06-01 | ETH714 | ADD → ARN | Jun 1, 14:00 UTC | Jun 2, 04:40 UTC | 14h 40m |
| 2026-05-31 | ETH909 | ADD → BKO | May 31, 20:50 UTC | Jun 1, 17:05 UTC | 20h 15m |
| 2026-05-30 | ETH741 | MAD → ADD | May 30, 22:50 UTC | May 31, 18:40 UTC | 19h 50m |
| 2026-05-30 | ETH741 | MAD → ADD | May 30, 21:40 UTC | May 31, 18:40 UTC | 21h 0m |
| 2026-05-30 | ETH741 | MAD → ADD | May 30, 19:00 UTC | May 30, 19:50 UTC | 50m |
| 2026-05-30 | ETH740 | ADD → MAD | May 30, 05:55 UTC | May 30, 06:45 UTC | 50m |
| 2026-05-30 | ETH740 | ADD → MAD | May 30, 00:55 UTC | May 30, 04:15 UTC | 3h 20m |
| 2026-05-27 | ETH725 | VIE → ADD | May 27, 20:15 UTC | May 27, 22:20 UTC | 2h 5m |
| 2026-05-27 | ETH725 | VIE → ADD | May 27, 17:35 UTC | May 27, 18:50 UTC | 1h 15m |
| 2026-05-27 | ETH724 | VIE → BRU | May 27, 05:19 UTC | May 27, 06:40 UTC | 1h 20m |
| 2026-05-26 | ETH724 | VIE → BRU | May 26, 14:14 UTC | May 27, 03:54 UTC | 13h 40m |
| 2026-05-25 | ETH725 | VIE → ADD | May 25, 20:15 UTC | May 26, 14:24 UTC | 18h 10m |
| 2026-05-25 | ETH725 | VIE → ADD | May 25, 17:40 UTC | May 25, 18:55 UTC | 1h 15m |
| 2026-05-25 | ETH724 | VIE → BRU | May 25, 05:20 UTC | May 25, 06:40 UTC | 1h 20m |
| 2026-05-24 | ETH724 | VIE → BRU | May 24, 14:10 UTC | May 25, 04:05 UTC | 13h 55m |
| 2026-05-23 | ETH737 | MXP → ADD | May 23, 21:55 UTC | May 24, 10:30 UTC | 12h 35m |
| 2026-05-23 | ETH737 | MXP → ADD | May 23, 19:15 UTC | May 23, 19:55 UTC | 40m |
| 2026-05-23 | ETH736 | MXP → ZRH | May 23, 05:35 UTC | May 23, 06:15 UTC | 40m |
| 2026-05-22 | ETH736 | MXP → ZRH | May 22, 08:50 UTC | May 23, 04:05 UTC | 19h 14m |
| 2026-05-20 | ETH715 | ARN → ADD | May 20, 20:00 UTC | May 20, 23:30 UTC | 3h 30m |
| 2026-05-20 | ETH715 | ARN → ADD | May 20, 18:00 UTC | May 20, 18:45 UTC | 45m |
| 2026-05-20 | ETH714 | ADD → ARN | May 20, 05:50 UTC | May 20, 06:30 UTC | 40m |
| 2026-05-19 | ETH714 | ADD → ARN | May 19, 12:15 UTC | May 20, 04:15 UTC | 16h 0m |
| 2026-05-19 | ETH845 | ADD → CPT | May 19, 10:25 UTC | May 19, 10:55 UTC | 30m |
| 2026-05-15 | ETH715 | ARN → ADD | May 15, 20:10 UTC | May 16, 00:10 UTC | 4h 0m |
| 2026-05-15 | ETH715 | ARN → ADD | May 15, 18:05 UTC | May 15, 18:50 UTC | 45m |
| 2026-05-15 | ETH714 | ADD → ARN | May 15, 05:50 UTC | May 15, 06:35 UTC | 45m |
| 2026-05-14 | ETH714 | ADD → ARN | May 14, 13:35 UTC | May 15, 04:25 UTC | 14h 50m |
| 2026-05-13 | ETH687 | DEL → ADD | May 13, 21:20 UTC | May 14, 16:40 UTC | 19h 20m |
| 2026-05-13 | ETH688 | ADD → DEL | May 13, 04:50 UTC | May 13, 19:25 UTC | 14h 35m |
| 2026-05-13 | ETH686 | ADD → DEL | May 13, 01:35 UTC | May 13, 02:10 UTC | 35m |
| 2026-05-11 | ETH725 | VIE → ADD | May 11, 21:30 UTC | May 11, 22:35 UTC | 1h 4m |
| 2026-05-11 | ETH725 | VIE → ADD | May 11, 17:40 UTC | May 11, 19:20 UTC | 1h 40m |
| 2026-05-11 | ETH724 | VIE → BRU | May 11, 05:10 UTC | May 11, 06:25 UTC | 1h 15m |
| 2026-05-10 | ETH724 | VIE → BRU | May 10, 14:34 UTC | May 11, 04:00 UTC | 13h 25m |
| 2026-05-09 | ETH741 | MAD → ADD | May 9, 22:39 UTC | May 10, 11:10 UTC | 12h 30m |
| 2026-05-09 | ETH741 | MAD → ADD | May 9, 19:14 UTC | May 9, 20:05 UTC | 50m |
| 2026-05-09 | ETH740 | ADD → MAD | May 9, 05:15 UTC | May 9, 06:10 UTC | 55m |
| 2026-05-08 | ETH740 | ADD → MAD | May 8, 23:15 UTC | May 9, 03:50 UTC | 4h 35m |
| 2026-05-07 | ETH645 | HKG → ADD | May 7, 18:30 UTC | May 7, 22:00 UTC | 3h 30m |
| 2026-05-07 | ETH645 | HKG → ADD | May 7, 16:50 UTC | May 7, 17:05 UTC | 15m |
| 2026-05-07 | ETH645 | HKG → ADD | May 7, 13:35 UTC | May 7, 15:15 UTC | 1h 40m |
| 2026-05-07 | ETH644 | HKG → MNL | May 7, 08:25 UTC | May 7, 10:10 UTC | 1h 45m |
| 2026-05-07 | ETH644 | HKG → MNL | May 7, 02:50 UTC | May 7, 06:30 UTC | 3h 40m |
| 2026-05-06 | ETH644 | HKG → MNL | May 6, 08:50 UTC | May 7, 06:30 UTC | 21h 39m |
| 2026-05-06 | ETH680 | - | May 6, 02:20 UTC | May 6, 03:20 UTC | 1h 0m |
| 2026-05-03 | UGD111 | - | May 3, 19:15 UTC | May 3, 21:14 UTC | 2h 0m |
| 2026-05-03 | UGD110 | - | May 3, 14:00 UTC | May 3, 16:05 UTC | 2h 5m |
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-ASI page for operator, model, and routing details .