sensors Mode-S transponder
040151
ICAO 24-bit transponder address · allocated to Ethiopia
Currently assigned to ET-AVI · BOEING 737 MAX 8
- Hex
- 040151
- Octal
- 01000521
- Decimal
- 262,481
- Country
- ET
- Tail
- ET-AVI
- Type
- B38M
- Flights observed
- 41
- Distinct callsigns
- 17
- Country
- ET
- Last broadcast
- 4d ago
Last known position
Country allocation
The ICAO 24-bit address 040151 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 17 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| ETH406 | Ethiopian Airlines | 11 | 2026-05-24 |
| ETH407 | Ethiopian Airlines | 9 | 2026-05-24 |
| ETH962 | - | 3 | 2026-06-15 |
| ETH963 | - | 2 | 2026-06-14 |
| ETH688 | Ethiopian Airlines | 2 | 2026-06-13 |
| ETH686 | - | 2 | 2026-06-12 |
| ETH423 | Ethiopian Airlines | 2 | 2026-04-25 |
| ETH859 | Ethiopian Airlines | 1 | 2026-06-11 |
| ETH691 | Ethiopian Airlines | 1 | 2026-04-20 |
| ETH690 | Ethiopian Airlines | 1 | 2026-04-20 |
| ETH689 | Ethiopian Airlines | 1 | 2026-06-12 |
| ETH687 | Ethiopian Airlines | 1 | 2026-06-13 |
| ETH433 | Ethiopian Airlines | 1 | 2026-05-18 |
| ETH432 | Ethiopian Airlines | 1 | 2026-05-19 |
| ETH429 | Ethiopian Airlines | 1 | 2026-05-23 |
| ETH415 | Ethiopian Airlines | 1 | 2026-06-05 |
| ETH404 | Ethiopian Airlines | 1 | 2026-06-05 |
Recent flights last 41
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-15 | ETH962 | - | Jun 15, 01:25 UTC | Jun 15, 01:50 UTC | 25m |
| 2026-06-14 | ETH963 | - | Jun 14, 23:05 UTC | Jun 14, 23:35 UTC | 29m |
| 2026-06-13 | ETH687 | DEL → ADD | Jun 13, 21:30 UTC | Jun 13, 22:00 UTC | 30m |
| 2026-06-13 | ETH688 | ADD → DEL | Jun 13, 19:10 UTC | Jun 13, 19:50 UTC | 40m |
| 2026-06-12 | ETH688 | ADD → DEL | Jun 12, 22:20 UTC | Jun 13, 19:50 UTC | 21h 29m |
| 2026-06-12 | ETH689 | DEL → ADD | Jun 12, 04:45 UTC | Jun 12, 22:35 UTC | 17h 50m |
| 2026-06-12 | ETH686 | - | Jun 12, 01:55 UTC | Jun 12, 02:50 UTC | 55m |
| 2026-06-11 | ETH686 | - | Jun 11, 06:30 UTC | Jun 12, 02:50 UTC | 20h 21m |
| 2026-06-11 | ETH859 | ADD → JNB | Jun 11, 01:45 UTC | Jun 11, 02:20 UTC | 35m |
| 2026-06-05 | ETH415 | TLV → ADD | Jun 5, 05:00 UTC | Jun 5, 05:20 UTC | 20m |
| 2026-06-05 | ETH404 | ADD → TLV | Jun 5, 02:30 UTC | Jun 5, 03:05 UTC | 35m |
| 2026-05-30 | ETH962 | DLA → ADD | May 30, 00:50 UTC | May 30, 01:20 UTC | 30m |
| 2026-05-29 | ETH963 | ADD → DLA | May 29, 23:05 UTC | May 29, 23:25 UTC | 20m |
| 2026-05-24 | ETH407 | BEY → ADD | May 24, 12:55 UTC | May 24, 13:50 UTC | 55m |
| 2026-05-24 | ETH406 | ADD → BEY | May 24, 10:20 UTC | May 24, 11:05 UTC | 45m |
| 2026-05-23 | ETH406 | ADD → BEY | May 23, 13:35 UTC | May 24, 11:05 UTC | 21h 30m |
| 2026-05-23 | ETH406 | ADD → BEY | May 23, 10:20 UTC | May 23, 11:10 UTC | 50m |
| 2026-05-23 | ETH429 | AMM → ADD | May 23, 00:40 UTC | May 23, 00:55 UTC | 15m |
| 2026-05-22 | ETH407 | BEY → ADD | May 22, 13:05 UTC | May 22, 23:15 UTC | 10h 10m |
| 2026-05-22 | ETH406 | ADD → BEY | May 22, 01:20 UTC | May 22, 11:40 UTC | 10h 20m |
| 2026-05-21 | ETH407 | BEY → ADD | May 21, 12:45 UTC | May 21, 22:50 UTC | 10h 5m |
| 2026-05-21 | ETH406 | ADD → BEY | May 21, 00:45 UTC | May 21, 11:05 UTC | 10h 20m |
| 2026-05-20 | ETH407 | BEY → ADD | May 20, 13:00 UTC | May 20, 23:00 UTC | 10h 0m |
| 2026-05-20 | ETH406 | ADD → BEY | May 20, 10:35 UTC | May 20, 11:25 UTC | 50m |
| 2026-05-19 | ETH432 | ADD → DOH | May 19, 22:30 UTC | May 19, 23:05 UTC | 35m |
| 2026-05-18 | ETH433 | DOH → ADD | May 18, 01:10 UTC | May 18, 01:35 UTC | 25m |
| 2026-05-17 | ETH407 | BEY → ADD | May 17, 12:50 UTC | May 17, 23:20 UTC | 10h 30m |
| 2026-05-17 | ETH406 | ADD → BEY | May 17, 02:20 UTC | May 17, 11:20 UTC | 9h 0m |
| 2026-05-14 | ETH407 | BEY → ADD | May 14, 12:55 UTC | May 14, 13:55 UTC | 1h 0m |
| 2026-05-14 | ETH406 | ADD → BEY | May 14, 10:40 UTC | May 14, 11:20 UTC | 40m |
| 2026-05-13 | ETH962 | DLA → ADD | May 13, 01:00 UTC | May 13, 01:25 UTC | 25m |
| 2026-05-12 | ETH407 | BEY → ADD | May 12, 12:55 UTC | May 12, 23:20 UTC | 10h 25m |
| 2026-05-12 | ETH406 | ADD → BEY | May 12, 10:40 UTC | May 12, 11:25 UTC | 45m |
| 2026-05-09 | ETH407 | BEY → ADD | May 9, 13:05 UTC | May 9, 14:00 UTC | 55m |
| 2026-05-09 | ETH406 | ADD → BEY | May 9, 00:10 UTC | May 9, 11:35 UTC | 11h 25m |
| 2026-05-05 | ETH407 | BEY → ADD | May 5, 13:00 UTC | May 5, 23:00 UTC | 10h 0m |
| 2026-05-05 | ETH406 | ADD → BEY | May 5, 10:40 UTC | May 5, 11:25 UTC | 45m |
| 2026-04-25 | ETH423 | DMM → ADD | Apr 25, 00:25 UTC | Apr 25, 08:50 UTC | 8h 25m |
| 2026-04-23 | ETH423 | DMM → ADD | Apr 23, 00:10 UTC | Apr 23, 00:20 UTC | 10m |
| 2026-04-20 | ETH691 | BLR → ADD | Apr 20, 11:10 UTC | Apr 20, 11:35 UTC | 25m |
| 2026-04-20 | ETH690 | ADD → BLR | Apr 20, 01:35 UTC | Apr 20, 02:00 UTC | 25m |
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-AVI page for operator, model, and routing details .