sensors Mode-S transponder
300635
ICAO 24-bit transponder address · allocated to Italy
Currently assigned to I-DELO · GULFSTREAM 5
- Hex
- 300635
- Octal
- 14003065
- Decimal
- 3,147,317
- Country
- IT
- Tail
- I-DELO
- Type
- GLF5
- Flights observed
- 48
- Distinct callsigns
- 1
- Country
- IT
- Last broadcast
- 6h ago
Last known position
Country allocation
The ICAO 24-bit address 300635 falls within the block assigned to Italy (IT) by ICAO Annex 10, Volume III. Every aircraft registered in Italy 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 1 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| SIO501 | - | 48 | 2026-07-26 |
Recent flights last 48
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | SIO501 | - | Jul 26, 19:00 UTC | Jul 26, 19:55 UTC | 55m |
| 2026-07-24 | SIO501 | - | Jul 24, 17:30 UTC | Jul 24, 18:25 UTC | 55m |
| 2026-07-24 | SIO501 | - | Jul 24, 14:25 UTC | Jul 24, 14:50 UTC | 25m |
| 2026-07-23 | SIO501 | - | Jul 23, 10:35 UTC | Jul 23, 11:00 UTC | 25m |
| 2026-07-20 | SIO501 | HPN → TSF | Jul 20, 22:15 UTC | Jul 21, 05:45 UTC | 7h 29m |
| 2026-07-17 | SIO501 | - | Jul 17, 08:15 UTC | Jul 17, 16:19 UTC | 8h 5m |
| 2026-07-15 | SIO501 | - | Jul 15, 18:30 UTC | Jul 15, 19:20 UTC | 50m |
| 2026-07-15 | SIO501 | - | Jul 15, 15:35 UTC | Jul 15, 16:35 UTC | 1h 0m |
| 2026-07-13 | SIO501 | - | Jul 13, 05:50 UTC | Jul 13, 06:40 UTC | 50m |
| 2026-07-11 | SIO501 | - | Jul 11, 17:50 UTC | Jul 11, 19:30 UTC | 1h 40m |
| 2026-07-11 | SIO501 | TRS → ATH | Jul 11, 14:30 UTC | Jul 11, 16:10 UTC | 1h 40m |
| 2026-07-11 | SIO501 | - | Jul 11, 09:40 UTC | Jul 11, 10:30 UTC | 50m |
| 2026-07-10 | SIO501 | - | Jul 10, 15:45 UTC | Jul 10, 18:00 UTC | 2h 15m |
| 2026-07-09 | SIO501 | - | Jul 9, 17:15 UTC | Jul 9, 18:55 UTC | 1h 40m |
| 2026-07-06 | SIO501 | - | Jul 6, 16:00 UTC | Jul 6, 16:45 UTC | 45m |
| 2026-07-06 | SIO501 | - | Jul 6, 08:15 UTC | Jul 6, 09:05 UTC | 50m |
| 2026-07-06 | SIO501 | - | Jul 6, 05:40 UTC | Jul 6, 06:25 UTC | 45m |
| 2026-07-06 | SIO501 | - | Jul 6, 04:10 UTC | Jul 6, 04:30 UTC | 20m |
| 2026-07-02 | SIO501 | TSF → CIA | Jul 2, 16:20 UTC | Jul 2, 17:00 UTC | 40m |
| 2026-06-28 | SIO501 | - | Jun 28, 18:25 UTC | Jun 28, 20:04 UTC | 1h 40m |
| 2026-06-27 | SIO501 | - | Jun 27, 06:50 UTC | Jun 27, 08:29 UTC | 1h 40m |
| 2026-06-23 | SIO501 | - | Jun 23, 17:50 UTC | Jun 23, 18:25 UTC | 35m |
| 2026-06-23 | SIO501 | - | Jun 23, 16:50 UTC | Jun 23, 17:44 UTC | 55m |
| 2026-06-22 | SIO501 | - | Jun 22, 13:44 UTC | Jun 22, 15:45 UTC | 2h 0m |
| 2026-06-21 | SIO501 | - | Jun 21, 14:44 UTC | Jun 21, 15:30 UTC | 45m |
| 2026-06-18 | SIO501 | TSF → NCE | Jun 18, 19:25 UTC | Jun 18, 20:55 UTC | 1h 30m |
| 2026-06-16 | SIO501 | LIN → TSF | Jun 16, 19:45 UTC | Jun 16, 20:10 UTC | 26m |
| 2026-06-15 | SIO501 | - | Jun 15, 13:20 UTC | Jun 15, 13:50 UTC | 30m |
| 2026-06-14 | SIO501 | - | Jun 14, 18:15 UTC | Jun 14, 19:00 UTC | 45m |
| 2026-06-11 | SIO501 | - | Jun 11, 17:10 UTC | Jun 11, 17:45 UTC | 35m |
| 2026-06-08 | SIO501 | - | Jun 8, 07:25 UTC | Jun 8, 08:10 UTC | 45m |
| 2026-06-05 | SIO501 | - | Jun 5, 16:35 UTC | Jun 5, 17:30 UTC | 55m |
| 2026-06-04 | SIO501 | - | Jun 4, 13:45 UTC | Jun 4, 14:20 UTC | 35m |
| 2026-06-04 | SIO501 | - | Jun 4, 09:15 UTC | Jun 4, 10:00 UTC | 45m |
| 2026-05-27 | SIO501 | TRN → TSF | May 27, 15:55 UTC | May 27, 16:30 UTC | 35m |
| 2026-05-27 | SIO501 | TSF → TRN | May 27, 11:50 UTC | May 27, 12:30 UTC | 40m |
| 2026-05-22 | SIO501 | - | May 22, 00:50 UTC | May 22, 08:05 UTC | 7h 15m |
| 2026-05-17 | SIO501 | - | May 17, 08:15 UTC | May 17, 15:31 UTC | 7h 15m |
| 2026-05-13 | SIO501 | - | May 13, 07:15 UTC | May 13, 09:00 UTC | 1h 45m |
| 2026-05-12 | SIO501 | - | May 12, 15:40 UTC | May 12, 16:05 UTC | 25m |
| 2026-05-12 | SIO501 | - | May 12, 12:25 UTC | May 12, 13:00 UTC | 35m |
| 2026-05-10 | SIO501 | - | May 10, 18:15 UTC | May 10, 19:45 UTC | 1h 30m |
| 2026-05-09 | SIO501 | - | May 9, 09:05 UTC | May 9, 10:50 UTC | 1h 45m |
| 2026-04-27 | SIO501 | - | Apr 27, 17:15 UTC | Apr 27, 18:50 UTC | 1h 35m |
| 2026-04-24 | SIO501 | - | Apr 24, 17:15 UTC | Apr 24, 18:55 UTC | 1h 40m |
| 2026-04-15 | SIO501 | LIN → TSF | Apr 15, 17:25 UTC | Apr 15, 17:50 UTC | 25m |
| 2026-04-14 | SIO501 | - | Apr 14, 17:50 UTC | Apr 14, 18:45 UTC | 55m |
| 2026-04-14 | SIO501 | - | Apr 14, 11:05 UTC | Apr 14, 12:20 UTC | 1h 15m |
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 I-DELO page for operator, model, and routing details .