sensors Mode-S transponder
04018B
ICAO 24-bit transponder address · allocated to Ethiopia
Currently assigned to ET-AXO · BOEING 737-800
- Hex
- 04018B
- Octal
- 01000613
- Decimal
- 262,539
- Country
- ET
- Tail
- ET-AXO
- Type
- B738
- Flights observed
- 29
- Distinct callsigns
- 15
- Country
- ET
- Last broadcast
- 5h ago
Last known position
Country allocation
The ICAO 24-bit address 04018B 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 |
|---|---|---|---|
| SKK022 | - | 5 | 2026-06-30 |
| SKK035 | Skylink Aviation | 3 | 2026-06-15 |
| SKK023 | - | 3 | 2026-06-25 |
| SKK077 | - | 2 | 2026-05-16 |
| SKK076 | - | 2 | 2026-05-15 |
| SKK069 | Skylink Aviation | 2 | 2026-05-29 |
| SKK051 | Skylink Aviation | 2 | 2026-06-02 |
| SKK050 | Skylink Aviation | 2 | 2026-06-01 |
| SKK034 | Skylink Aviation | 2 | 2026-06-08 |
| SKK1035 | - | 1 | 2026-06-10 |
| SKK068 | - | 1 | 2026-05-28 |
| SKK065 | - | 1 | 2026-05-23 |
| SKK015 | Skylink Aviation | 1 | 2026-06-05 |
| SKK014 | Skylink Aviation | 1 | 2026-06-04 |
| BOJ TIP7 | - | 1 | 2026-05-01 |
Recent flights last 29
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-30 | SKK022 | - | Jun 30, 18:10 UTC | Jun 30, 18:40 UTC | 30m |
| 2026-06-25 | SKK023 | - | Jun 25, 06:20 UTC | Jun 25, 06:50 UTC | 30m |
| 2026-06-24 | SKK022 | - | Jun 24, 18:09 UTC | Jun 24, 18:39 UTC | 30m |
| 2026-06-15 | SKK035 | DLA → LFW | Jun 15, 16:19 UTC | Jun 16, 08:44 UTC | 16h 25m |
| 2026-06-10 | SKK1035 | - | Jun 10, 09:20 UTC | Jun 10, 09:30 UTC | 10m |
| 2026-06-08 | SKK034 | LFW → DLA | Jun 8, 16:15 UTC | Jun 8, 17:30 UTC | 1h 15m |
| 2026-06-05 | SKK015 | NKC → CKY | Jun 5, 07:10 UTC | Jun 5, 08:00 UTC | 50m |
| 2026-06-04 | SKK014 | CKY → NKC | Jun 4, 17:15 UTC | Jun 4, 18:00 UTC | 45m |
| 2026-06-02 | SKK051 | DSS → COO | Jun 2, 07:15 UTC | Jun 2, 07:50 UTC | 35m |
| 2026-06-01 | SKK050 | LFW → DSS | Jun 1, 17:45 UTC | Jun 1, 18:35 UTC | 50m |
| 2026-05-30 | SKK051 | DSS → COO | May 30, 07:05 UTC | May 30, 07:45 UTC | 40m |
| 2026-05-29 | SKK050 | LFW → DSS | May 29, 17:35 UTC | May 29, 18:10 UTC | 35m |
| 2026-05-29 | SKK069 | SSG → LFW | May 29, 07:30 UTC | May 29, 07:45 UTC | 15m |
| 2026-05-28 | SKK068 | - | May 28, 16:35 UTC | May 28, 17:20 UTC | 45m |
| 2026-05-27 | SKK023 | BJL → FNA | May 27, 06:15 UTC | May 27, 06:25 UTC | 10m |
| 2026-05-26 | SKK022 | FNA → BJL | May 26, 17:35 UTC | May 26, 18:10 UTC | 35m |
| 2026-05-26 | SKK035 | - | May 26, 07:55 UTC | May 26, 08:24 UTC | 30m |
| 2026-05-24 | SKK023 | BJL → FNA | May 24, 06:20 UTC | May 24, 06:35 UTC | 15m |
| 2026-05-23 | SKK022 | FNA → BJL | May 23, 09:55 UTC | May 23, 18:45 UTC | 8h 51m |
| 2026-05-23 | SKK065 | - | May 23, 08:20 UTC | May 23, 08:45 UTC | 25m |
| 2026-05-17 | SKK069 | SSG → LFW | May 17, 07:45 UTC | May 17, 08:00 UTC | 15m |
| 2026-05-16 | SKK077 | - | May 16, 08:36 UTC | May 16, 17:35 UTC | 9h 0m |
| 2026-05-16 | SKK077 | - | May 16, 06:45 UTC | May 16, 07:11 UTC | 25m |
| 2026-05-15 | SKK076 | - | May 15, 17:25 UTC | May 15, 17:55 UTC | 30m |
| 2026-05-15 | SKK076 | - | May 15, 15:40 UTC | May 15, 16:20 UTC | 40m |
| 2026-05-06 | SKK034 | - | May 6, 17:10 UTC | May 7, 08:40 UTC | 15h 30m |
| 2026-05-01 | BOJ TIP7 | - | May 1, 06:30 UTC | May 1, 06:50 UTC | 20m |
| 2026-04-30 | SKK022 | FNA → BJL | Apr 30, 18:20 UTC | Apr 30, 18:45 UTC | 25m |
| 2026-04-20 | SKK035 | - | Apr 20, 16:55 UTC | Apr 21, 09:05 UTC | 16h 10m |
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-AXO page for operator, model, and routing details .