sensors Mode-S transponder
04005D
ICAO 24-bit transponder address · allocated to Ethiopia
Currently assigned to ET-APM · BOEING 737-800
- Hex
- 04005D
- Octal
- 01000135
- Decimal
- 262,237
- Country
- ET
- Tail
- ET-APM
- Type
- B738
- Flights observed
- 35
- Distinct callsigns
- 17
- Country
- ET
- Last broadcast
- 1d ago
Last known position
Country allocation
The ICAO 24-bit address 04005D 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 |
|---|---|---|---|
| SKK022 | Skylink Aviation | 7 | 2026-06-01 |
| SKK065 | - | 4 | 2026-05-09 |
| SKK023 | Skylink Aviation | 4 | 2026-05-26 |
| SKK075 | Skylink Aviation | 2 | 2026-05-11 |
| SKK069 | Skylink Aviation | 2 | 2026-05-20 |
| SKK068 | - | 2 | 2026-05-19 |
| SKK051 | Skylink Aviation | 2 | 2026-05-29 |
| SKK035 | - | 2 | 2026-05-15 |
| SKK034 | - | 2 | 2026-04-24 |
| SKK079 | Skylink Aviation | 1 | 2026-04-27 |
| SKK078 | - | 1 | 2026-04-26 |
| SKK074 | Skylink Aviation | 1 | 2026-05-10 |
| SKK050 | Skylink Aviation | 1 | 2026-05-28 |
| SKK015 | Skylink Aviation | 1 | 2026-04-26 |
| SKK014 | Skylink Aviation | 1 | 2026-04-25 |
| SK050 | - | 1 | 2026-05-06 |
| KK022 | - | 1 | 2026-05-14 |
Recent flights last 35
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-01 | SKK022 | FNA → BJL | Jun 1, 17:45 UTC | Jun 1, 17:55 UTC | 10m |
| 2026-05-29 | SKK051 | DSS → COO | May 29, 06:35 UTC | May 29, 07:15 UTC | 40m |
| 2026-05-28 | SKK050 | LFW → DSS | May 28, 17:15 UTC | May 28, 17:55 UTC | 40m |
| 2026-05-26 | SKK023 | BJL → FNA | May 26, 06:20 UTC | May 26, 06:29 UTC | 10m |
| 2026-05-25 | SKK022 | FNA → BJL | May 25, 18:40 UTC | May 25, 18:55 UTC | 15m |
| 2026-05-20 | SKK069 | SSG → LFW | May 20, 07:00 UTC | May 20, 07:25 UTC | 25m |
| 2026-05-19 | SKK068 | - | May 19, 17:40 UTC | May 19, 18:05 UTC | 25m |
| 2026-05-18 | SKK022 | FNA → BJL | May 18, 18:15 UTC | May 18, 18:40 UTC | 24m |
| 2026-05-15 | SKK035 | - | May 15, 16:35 UTC | May 16, 08:46 UTC | 16h 11m |
| 2026-05-14 | KK022 | - | May 14, 18:00 UTC | May 14, 18:10 UTC | 10m |
| 2026-05-13 | SKK023 | BJL → FNA | May 13, 06:20 UTC | May 13, 06:30 UTC | 10m |
| 2026-05-12 | SKK022 | FNA → BJL | May 12, 18:00 UTC | May 12, 18:25 UTC | 25m |
| 2026-05-11 | SKK075 | LBV → LFW | May 11, 03:30 UTC | May 11, 04:00 UTC | 30m |
| 2026-05-10 | SKK074 | LBV → JNB | May 10, 21:14 UTC | May 10, 21:44 UTC | 30m |
| 2026-05-09 | SKK065 | - | May 9, 09:05 UTC | May 9, 09:30 UTC | 25m |
| 2026-05-09 | SKK065 | - | May 9, 07:45 UTC | May 9, 08:05 UTC | 20m |
| 2026-05-07 | SKK051 | DSS → COO | May 7, 09:40 UTC | May 7, 10:10 UTC | 30m |
| 2026-05-06 | SK050 | BJL → DSS | May 6, 06:20 UTC | May 6, 17:45 UTC | 11h 24m |
| 2026-05-05 | SKK022 | FNA → BJL | May 5, 18:10 UTC | May 5, 18:30 UTC | 20m |
| 2026-05-05 | SKK065 | - | May 5, 08:55 UTC | May 5, 09:20 UTC | 25m |
| 2026-05-05 | SKK065 | - | May 5, 07:40 UTC | May 5, 08:05 UTC | 25m |
| 2026-04-27 | SKK035 | - | Apr 27, 16:30 UTC | Apr 28, 08:45 UTC | 16h 15m |
| 2026-04-27 | SKK079 | NBO → LFW | Apr 27, 10:05 UTC | Apr 27, 10:20 UTC | 15m |
| 2026-04-26 | SKK078 | - | Apr 26, 14:35 UTC | Apr 26, 15:00 UTC | 25m |
| 2026-04-26 | SKK015 | NKC → CKY | Apr 26, 07:15 UTC | Apr 26, 08:10 UTC | 55m |
| 2026-04-25 | SKK014 | CKY → NKC | Apr 25, 17:15 UTC | Apr 25, 18:05 UTC | 50m |
| 2026-04-24 | SKK034 | - | Apr 24, 16:30 UTC | Apr 25, 08:50 UTC | 16h 20m |
| 2026-04-22 | SKK034 | - | Apr 22, 16:40 UTC | Apr 22, 17:15 UTC | 35m |
| 2026-04-21 | SKK023 | BJL → FNA | Apr 21, 06:20 UTC | Apr 21, 06:40 UTC | 20m |
| 2026-04-20 | SKK022 | FNA → BJL | Apr 20, 17:45 UTC | Apr 20, 18:10 UTC | 25m |
| 2026-04-19 | SKK023 | BJL → FNA | Apr 19, 06:25 UTC | Apr 19, 06:40 UTC | 15m |
| 2026-04-18 | SKK022 | FNA → BJL | Apr 18, 18:20 UTC | Apr 18, 18:45 UTC | 25m |
| 2026-04-17 | SKK069 | SSG → LFW | Apr 17, 07:20 UTC | Apr 17, 07:40 UTC | 20m |
| 2026-04-16 | SKK068 | - | Apr 16, 18:15 UTC | Apr 16, 18:40 UTC | 25m |
| 2026-04-13 | SKK075 | - | Apr 13, 03:45 UTC | Apr 13, 04:15 UTC | 30m |
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-APM page for operator, model, and routing details .