sensors Mode-S transponder
A1F403
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N225EL · GULFSTREAM 5 · operated by THESUN LLC
- Hex
- A1F403
- Octal
- 50372003
- Decimal
- 10,613,763
- Country
- US
- Tail
- N225EL
- Type
- GLF5
- Flights observed
- 51
- Distinct callsigns
- 2
- Country
- US
- Last broadcast
- 7h ago
Last known position
Country allocation
The ICAO 24-bit address A1F403 falls within the block assigned to United States (US) by ICAO Annex 10, Volume III. Every aircraft registered in United States 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 2 distinct
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-17 | PRD5 | - | Jul 17, 23:50 UTC | Jul 18, 01:50 UTC | 2h 0m |
| 2026-07-17 | PRD5 | - | Jul 17, 21:10 UTC | Jul 17, 22:55 UTC | 1h 45m |
| 2026-07-17 | PRD5 | - | Jul 17, 16:24 UTC | Jul 17, 20:20 UTC | 3h 55m |
| 2026-07-13 | PRD5 | - | Jul 13, 18:10 UTC | Jul 13, 22:15 UTC | 4h 5m |
| 2026-07-13 | PRD5 | - | Jul 13, 14:55 UTC | Jul 13, 16:50 UTC | 1h 55m |
| 2026-07-13 | PRD5 | - | Jul 13, 11:20 UTC | Jul 13, 13:25 UTC | 2h 5m |
| 2026-07-12 | PRD5 | - | Jul 12, 13:45 UTC | Jul 12, 16:05 UTC | 2h 20m |
| 2026-07-10 | PRD5 | TEB → FRG | Jul 10, 22:45 UTC | Jul 10, 23:15 UTC | 30m |
| 2026-07-10 | PRD5 | - | Jul 10, 19:35 UTC | Jul 10, 21:55 UTC | 2h 20m |
| 2026-07-09 | PRD5 | - | Jul 9, 22:40 UTC | Jul 9, 22:50 UTC | 10m |
| 2026-07-09 | PRD5 | - | Jul 9, 12:45 UTC | Jul 9, 21:55 UTC | 9h 10m |
| 2026-07-03 | PRD5 | OPF → EZE | Jul 3, 13:35 UTC | Jul 3, 21:55 UTC | 8h 20m |
| 2026-07-03 | PRD5 | - | Jul 3, 11:10 UTC | Jul 3, 11:30 UTC | 20m |
| 2026-06-29 | PRD5 | - | Jun 29, 00:20 UTC | Jun 29, 02:35 UTC | 2h 15m |
| 2026-06-28 | PRD5 | - | Jun 28, 20:59 UTC | Jun 28, 23:20 UTC | 2h 20m |
| 2026-06-28 | PRD5 | - | Jun 28, 19:29 UTC | Jun 28, 19:59 UTC | 30m |
| 2026-06-28 | PRD5 | - | Jun 28, 17:30 UTC | Jun 28, 18:05 UTC | 35m |
| 2026-06-28 | PRD5 | - | Jun 28, 13:19 UTC | Jun 28, 15:29 UTC | 2h 10m |
| 2026-06-24 | PRD5 | - | Jun 24, 00:55 UTC | Jun 24, 01:04 UTC | 10m |
| 2026-06-23 | PRD5 | FPO → FLL | Jun 23, 23:34 UTC | Jun 23, 23:59 UTC | 25m |
| 2026-06-23 | PRD5 | - | Jun 23, 16:44 UTC | Jun 23, 16:59 UTC | 15m |
| 2026-06-12 | N225EL | - | Jun 12, 19:20 UTC | Jun 13, 02:15 UTC | 6h 55m |
| 2026-06-12 | N225EL | - | Jun 12, 17:55 UTC | Jun 12, 18:05 UTC | 10m |
| 2026-06-09 | PRD5 | - | Jun 9, 02:50 UTC | Jun 9, 03:05 UTC | 15m |
| 2026-06-09 | PRD5 | - | Jun 9, 00:00 UTC | Jun 9, 02:05 UTC | 2h 5m |
| 2026-06-07 | PRD5 | - | Jun 7, 17:00 UTC | Jun 7, 19:35 UTC | 2h 35m |
| 2026-06-07 | PRD5 | - | Jun 7, 14:55 UTC | Jun 7, 15:25 UTC | 30m |
| 2026-06-07 | PRD5 | - | Jun 7, 11:50 UTC | Jun 7, 12:10 UTC | 20m |
| 2026-06-05 | PRD5 | - | Jun 5, 17:30 UTC | Jun 5, 20:00 UTC | 2h 30m |
| 2026-06-05 | PRD5 | - | Jun 5, 14:05 UTC | Jun 5, 16:45 UTC | 2h 40m |
| 2026-06-04 | PRD5 | - | Jun 4, 16:00 UTC | Jun 4, 16:25 UTC | 25m |
| 2026-06-04 | PRD5 | - | Jun 4, 14:10 UTC | Jun 4, 14:30 UTC | 20m |
| 2026-05-24 | PRD5 | - | May 24, 10:05 UTC | May 24, 19:30 UTC | 9h 25m |
| 2026-05-21 | PRD5 | - | May 21, 18:55 UTC | May 22, 03:30 UTC | 8h 35m |
| 2026-05-21 | PRD5 | - | May 21, 16:20 UTC | May 21, 16:30 UTC | 10m |
| 2026-05-14 | PRD5 | - | May 14, 23:05 UTC | May 15, 01:25 UTC | 2h 20m |
| 2026-05-14 | PRD5 | MXP → FRG | May 14, 08:20 UTC | May 14, 16:25 UTC | 8h 5m |
| 2026-05-11 | PRD5 | - | May 11, 07:40 UTC | May 11, 08:30 UTC | 50m |
| 2026-05-08 | PRD5 | - | May 8, 00:09 UTC | May 8, 09:04 UTC | 8h 55m |
| 2026-05-03 | PRD5 | - | May 3, 22:54 UTC | May 4, 01:00 UTC | 2h 5m |
| 2026-05-03 | PRD5 | - | May 3, 18:55 UTC | May 3, 22:15 UTC | 3h 20m |
| 2026-05-03 | PRD5 | - | May 3, 15:05 UTC | May 3, 17:20 UTC | 2h 15m |
| 2026-04-18 | PRD5 | - | Apr 18, 18:30 UTC | Apr 18, 20:25 UTC | 1h 55m |
| 2026-04-18 | PRD5 | - | Apr 18, 18:00 UTC | Apr 18, 18:25 UTC | 25m |
| 2026-04-18 | PRD5 | - | Apr 18, 02:40 UTC | Apr 18, 03:20 UTC | 40m |
| 2026-04-18 | PRD5 | - | Apr 18, 00:10 UTC | Apr 18, 00:30 UTC | 20m |
| 2026-04-17 | PRD5 | - | Apr 17, 21:25 UTC | Apr 17, 22:35 UTC | 1h 10m |
| 2026-04-17 | PRD5 | - | Apr 17, 20:45 UTC | Apr 17, 21:20 UTC | 35m |
| 2026-04-13 | PRD5 | - | Apr 13, 05:45 UTC | Apr 13, 06:00 UTC | 15m |
| 2026-04-13 | PRD5 | - | Apr 13, 01:20 UTC | Apr 13, 03:25 UTC | 2h 5m |
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 N225EL page for operator, model, and routing details .