sensors Mode-S transponder
040231
ICAO 24-bit transponder address · allocated to Ethiopia
Currently assigned to ET-BAH · BOEING 737-800
- Hex
- 040231
- Octal
- 01001061
- Decimal
- 262,705
- Country
- ET
- Tail
- ET-BAH
- Type
- B738
- Flights observed
- 31
- Distinct callsigns
- 15
- Country
- ET
- Last broadcast
- 21d ago
Last known position
Country allocation
The ICAO 24-bit address 040231 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 15 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SKK051 | Skylink Aviation | 5 | 2026-07-25 |
| SKK050 | - | 4 | 2026-07-15 |
| SKK070 | Skylink Aviation | 3 | 2026-07-26 |
| SKK069 | - | 3 | 2026-07-10 |
| SKK068 | - | 3 | 2026-07-09 |
| SKK071 | Skylink Aviation | 2 | 2026-07-22 |
| SKK065 | - | 2 | 2026-07-14 |
| SKK022 | Skylink Aviation | 2 | 2026-07-20 |
| SKK50 | Skylink Aviation | 1 | 2026-07-24 |
| SKK064 | - | 1 | 2026-07-13 |
| SKK025 | Skylink Aviation | 1 | 2026-07-19 |
| SKK024 | Skylink Aviation | 1 | 2026-07-18 |
| SKK023 | - | 1 | 2026-06-28 |
| SKK015 | - | 1 | 2026-07-13 |
| SKK014 | - | 1 | 2026-07-12 |
Recent flights last 31
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | SKK070 | FIH → JNB | Jul 26, 21:20 UTC | Jul 26, 22:00 UTC | 40m |
| 2026-07-25 | SKK051 | DSS → COO | Jul 25, 09:45 UTC | Jul 25, 10:15 UTC | 30m |
| 2026-07-24 | SKK50 | LFW → DSS | Jul 24, 17:15 UTC | Jul 24, 17:55 UTC | 40m |
| 2026-07-22 | SKK071 | FIH → LFW | Jul 22, 03:40 UTC | Jul 22, 04:10 UTC | 30m |
| 2026-07-21 | SKK070 | FIH → JNB | Jul 21, 06:15 UTC | Jul 21, 21:35 UTC | 15h 20m |
| 2026-07-20 | SKK022 | FNA → BJL | Jul 20, 18:15 UTC | Jul 20, 18:40 UTC | 25m |
| 2026-07-19 | SKK025 | BJL → FNA | Jul 19, 06:40 UTC | Jul 19, 07:10 UTC | 30m |
| 2026-07-18 | SKK024 | ROB → BJL | Jul 18, 17:20 UTC | Jul 18, 17:50 UTC | 30m |
| 2026-07-16 | SKK051 | - | Jul 16, 09:35 UTC | Jul 16, 10:04 UTC | 30m |
| 2026-07-15 | SKK050 | JNB → DSS | Jul 15, 04:50 UTC | Jul 15, 17:55 UTC | 13h 5m |
| 2026-07-14 | SKK065 | - | Jul 14, 09:15 UTC | Jul 14, 21:40 UTC | 12h 25m |
| 2026-07-14 | SKK065 | - | Jul 14, 08:00 UTC | Jul 14, 08:15 UTC | 15m |
| 2026-07-13 | SKK064 | - | Jul 13, 16:40 UTC | Jul 13, 16:55 UTC | 15m |
| 2026-07-13 | SKK015 | - | Jul 13, 07:25 UTC | Jul 13, 15:50 UTC | 8h 25m |
| 2026-07-12 | SKK014 | - | Jul 12, 17:20 UTC | Jul 12, 18:05 UTC | 45m |
| 2026-07-10 | SKK069 | - | Jul 10, 07:35 UTC | Jul 10, 07:55 UTC | 20m |
| 2026-07-09 | SKK068 | - | Jul 9, 16:50 UTC | Jul 9, 17:20 UTC | 30m |
| 2026-07-08 | SKK051 | - | Jul 8, 06:45 UTC | Jul 8, 07:25 UTC | 40m |
| 2026-07-07 | SKK050 | - | Jul 7, 17:25 UTC | Jul 7, 18:05 UTC | 40m |
| 2026-07-06 | SKK051 | - | Jul 6, 07:20 UTC | Jul 6, 07:55 UTC | 35m |
| 2026-07-05 | SKK050 | - | Jul 5, 16:10 UTC | Jul 5, 16:50 UTC | 40m |
| 2026-07-05 | SKK069 | - | Jul 5, 07:45 UTC | Jul 5, 08:05 UTC | 20m |
| 2026-07-04 | SKK068 | - | Jul 4, 17:05 UTC | Jul 4, 17:30 UTC | 25m |
| 2026-07-04 | SKK051 | - | Jul 4, 09:40 UTC | Jul 4, 10:15 UTC | 35m |
| 2026-07-03 | SKK050 | - | Jul 3, 15:55 UTC | Jul 3, 16:35 UTC | 40m |
| 2026-07-03 | SKK069 | NSI → NSI | Jul 3, 07:40 UTC | Jul 3, 07:50 UTC | 10m |
| 2026-07-02 | SKK068 | - | Jul 2, 17:10 UTC | Jul 2, 17:40 UTC | 30m |
| 2026-07-01 | SKK071 | - | Jul 1, 03:45 UTC | Jul 1, 04:15 UTC | 30m |
| 2026-06-30 | SKK070 | FIH → JNB | Jun 30, 23:05 UTC | Jun 30, 23:40 UTC | 35m |
| 2026-06-28 | SKK023 | - | Jun 28, 06:15 UTC | Jun 28, 06:30 UTC | 15m |
| 2026-06-27 | SKK022 | - | Jun 27, 17:59 UTC | Jun 27, 18:20 UTC | 20m |
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-BAH page for operator, model, and routing details .