sensors Mode-S transponder
04023E
ICAO 24-bit transponder address · allocated to Ethiopia
Currently assigned to ET-BAU · BOEING 737 MAX 8
- Hex
- 04023E
- Octal
- 01001076
- Decimal
- 262,718
- Country
- ET
- Tail
- ET-BAU
- Type
- B38M
- Flights observed
- 93
- Distinct callsigns
- 11
- Country
- ET
- Last broadcast
- Jul 26, 17:50 UTC
Last known position
Country allocation
The ICAO 24-bit address 04023E 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 11 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SKK014 | - | 27 | 2026-07-07 |
| SKK076 | - | 24 | 2026-07-20 |
| SKK077 | - | 11 | 2026-07-21 |
| SKK022 | Skylink Aviation | 9 | 2026-07-26 |
| SKK023 | Skylink Aviation | 6 | 2026-07-25 |
| SKK015 | - | 5 | 2026-07-11 |
| SKK051 | - | 4 | 2026-07-03 |
| SKK050 | - | 4 | 2026-07-02 |
| SKK079 | Skylink Aviation | 1 | 2026-05-11 |
| SKK078 | Skylink Aviation | 1 | 2026-05-31 |
| SKK055 | Skylink Aviation | 1 | 2026-06-01 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | SKK022 | FNA → BJL | Jul 26, 17:25 UTC | Jul 26, 17:50 UTC | 25m |
| 2026-07-25 | SKK023 | BJL → FNA | Jul 25, 06:15 UTC | Jul 25, 06:40 UTC | 25m |
| 2026-07-24 | SKK022 | FNA → BJL | Jul 24, 18:20 UTC | Jul 24, 18:45 UTC | 25m |
| 2026-07-21 | SKK077 | - | Jul 21, 09:25 UTC | Jul 21, 10:00 UTC | 35m |
| 2026-07-20 | SKK076 | - | Jul 20, 18:40 UTC | Jul 21, 07:30 UTC | 12h 49m |
| 2026-07-20 | SKK076 | - | Jul 20, 06:15 UTC | Jul 20, 17:25 UTC | 11h 10m |
| 2026-07-19 | SKK022 | FNA → BJL | Jul 19, 17:10 UTC | Jul 19, 17:35 UTC | 25m |
| 2026-07-18 | SKK023 | - | Jul 18, 06:15 UTC | Jul 18, 06:40 UTC | 25m |
| 2026-07-17 | SKK022 | - | Jul 17, 18:00 UTC | Jul 17, 18:25 UTC | 25m |
| 2026-07-14 | SKK077 | - | Jul 14, 08:10 UTC | Jul 14, 08:50 UTC | 40m |
| 2026-07-13 | SKK076 | - | Jul 13, 17:40 UTC | Jul 14, 06:55 UTC | 13h 15m |
| 2026-07-13 | SKK076 | - | Jul 13, 15:50 UTC | Jul 13, 16:25 UTC | 35m |
| 2026-07-11 | SKK015 | - | Jul 11, 17:05 UTC | Jul 12, 08:01 UTC | 14h 55m |
| 2026-07-07 | SKK014 | - | Jul 7, 17:20 UTC | Jul 8, 08:05 UTC | 14h 45m |
| 2026-07-07 | SKK014 | - | Jul 7, 09:35 UTC | Jul 8, 07:30 UTC | 21h 55m |
| 2026-07-04 | SKK015 | - | Jul 4, 17:05 UTC | Jul 5, 09:15 UTC | 16h 10m |
| 2026-07-04 | SKK014 | - | Jul 4, 08:10 UTC | Jul 4, 17:50 UTC | 9h 40m |
| 2026-07-04 | SKK077 | - | Jul 4, 06:30 UTC | Jul 4, 07:00 UTC | 30m |
| 2026-07-03 | SKK076 | - | Jul 3, 17:20 UTC | Jul 3, 17:55 UTC | 35m |
| 2026-07-03 | SKK051 | - | Jul 3, 06:45 UTC | Jul 3, 16:20 UTC | 9h 35m |
| 2026-07-02 | SKK050 | - | Jul 2, 18:05 UTC | Jul 2, 18:45 UTC | 40m |
| 2026-06-30 | SKK014 | - | Jun 30, 17:25 UTC | Jul 1, 08:05 UTC | 14h 40m |
| 2026-06-30 | SKK014 | - | Jun 30, 08:55 UTC | Jul 1, 07:30 UTC | 22h 35m |
| 2026-06-29 | SKK076 | - | Jun 29, 18:05 UTC | Jun 30, 06:45 UTC | 12h 41m |
| 2026-06-29 | SKK076 | - | Jun 29, 16:25 UTC | Jun 29, 16:59 UTC | 35m |
| 2026-06-27 | SKK015 | - | Jun 27, 17:04 UTC | Jun 28, 07:50 UTC | 14h 45m |
| 2026-06-26 | SKK051 | - | Jun 26, 06:45 UTC | Jun 26, 07:14 UTC | 30m |
| 2026-06-25 | SKK050 | - | Jun 25, 17:49 UTC | Jun 25, 18:34 UTC | 45m |
| 2026-06-23 | SKK014 | - | Jun 23, 16:59 UTC | Jun 24, 08:04 UTC | 15h 5m |
| 2026-06-23 | SKK014 | - | Jun 23, 08:30 UTC | Jun 24, 07:30 UTC | 23h 0m |
| 2026-06-22 | SKK076 | - | Jun 22, 17:44 UTC | Jun 23, 06:49 UTC | 13h 5m |
| 2026-06-22 | SKK076 | - | Jun 22, 10:19 UTC | Jun 22, 16:34 UTC | 6h 15m |
| 2026-06-20 | SKK014 | CKY → NKC | Jun 20, 16:49 UTC | Jun 21, 08:04 UTC | 15h 15m |
| 2026-06-16 | SKK014 | CKY → NKC | Jun 16, 17:10 UTC | Jun 17, 08:30 UTC | 15h 21m |
| 2026-06-16 | SKK014 | CKY → NKC | Jun 16, 08:25 UTC | Jun 16, 17:55 UTC | 9h 30m |
| 2026-06-15 | SKK076 | - | Jun 15, 17:54 UTC | Jun 16, 06:54 UTC | 13h 0m |
| 2026-06-15 | SKK076 | - | Jun 15, 10:40 UTC | Jun 15, 16:45 UTC | 6h 5m |
| 2026-06-14 | SKK014 | CKY → NKC | Jun 14, 07:25 UTC | Jun 14, 15:45 UTC | 8h 20m |
| 2026-06-13 | SKK014 | CKY → NKC | Jun 13, 17:35 UTC | Jun 14, 15:45 UTC | 22h 10m |
| 2026-06-13 | SKK014 | CKY → NKC | Jun 13, 17:10 UTC | Jun 14, 08:05 UTC | 14h 56m |
| 2026-06-09 | SKK077 | - | Jun 9, 08:55 UTC | Jun 9, 09:35 UTC | 40m |
| 2026-06-08 | SKK076 | - | Jun 8, 18:35 UTC | Jun 9, 07:25 UTC | 12h 50m |
| 2026-06-08 | SKK076 | - | Jun 8, 10:10 UTC | Jun 8, 16:20 UTC | 6h 10m |
| 2026-06-06 | SKK014 | CKY → NKC | Jun 6, 17:19 UTC | Jun 7, 07:50 UTC | 14h 30m |
| 2026-06-05 | SKK022 | FNA → BJL | Jun 5, 17:45 UTC | Jun 5, 17:55 UTC | 10m |
| 2026-06-02 | SKK014 | CKY → NKC | Jun 2, 17:15 UTC | Jun 3, 08:05 UTC | 14h 50m |
| 2026-06-02 | SKK014 | CKY → NKC | Jun 2, 08:30 UTC | Jun 3, 07:30 UTC | 23h 0m |
| 2026-06-02 | SKK077 | - | Jun 2, 06:25 UTC | Jun 2, 07:00 UTC | 35m |
| 2026-06-01 | SKK055 | RAI → DSS | Jun 1, 17:50 UTC | Jun 1, 18:20 UTC | 30m |
| 2026-06-01 | SKK076 | - | Jun 1, 09:45 UTC | Jun 1, 16:45 UTC | 7h 0m |
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-BAU page for operator, model, and routing details .