sensors Mode-S transponder
A9E927
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N738E · BOMBARDIER BD-100 Challenger 300
- Hex
- A9E927
- Octal
- 52364447
- Decimal
- 11,135,271
- Country
- US
- Tail
- N738E
- Type
- CL30
- Flights observed
- 49
- Distinct callsigns
- 2
- Country
- US
- Last broadcast
- 3d ago
Last known position
Country allocation
The ICAO 24-bit address A9E927 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 49
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-24 | N738E | SJC → CGF | Jul 24, 13:40 UTC | Jul 24, 17:45 UTC | 4h 5m |
| 2026-07-23 | N738E | - | Jul 23, 20:05 UTC | Jul 24, 00:55 UTC | 4h 50m |
| 2026-07-23 | N738E | - | Jul 23, 00:20 UTC | Jul 23, 01:25 UTC | 1h 5m |
| 2026-07-22 | N738E | - | Jul 22, 11:35 UTC | Jul 22, 12:00 UTC | 25m |
| 2026-07-20 | N738E | - | Jul 20, 14:45 UTC | Jul 20, 18:50 UTC | 4h 5m |
| 2026-07-19 | N738E | - | Jul 19, 18:10 UTC | Jul 19, 22:55 UTC | 4h 45m |
| 2026-07-14 | N738E | - | Jul 14, 22:30 UTC | Jul 15, 00:50 UTC | 2h 19m |
| 2026-07-12 | N738E | - | Jul 12, 16:15 UTC | Jul 12, 17:20 UTC | 1h 5m |
| 2026-07-11 | N738E | - | Jul 11, 14:15 UTC | Jul 11, 15:55 UTC | 1h 40m |
| 2026-07-07 | N738E | - | Jul 7, 19:40 UTC | Jul 7, 20:45 UTC | 1h 5m |
| 2026-06-29 | N738E | - | Jun 29, 18:19 UTC | Jun 29, 18:55 UTC | 35m |
| 2026-06-29 | N738E | - | Jun 29, 14:19 UTC | Jun 29, 15:45 UTC | 1h 25m |
| 2026-06-18 | 00000000 | - | Jun 18, 12:05 UTC | Jun 18, 12:45 UTC | 40m |
| 2026-06-17 | 00000000 | - | Jun 17, 23:35 UTC | Jun 18, 02:35 UTC | 3h 0m |
| 2026-06-15 | 00000000 | - | Jun 15, 11:34 UTC | Jun 15, 14:10 UTC | 2h 35m |
| 2026-06-14 | 00000000 | - | Jun 14, 18:55 UTC | Jun 14, 19:25 UTC | 30m |
| 2026-06-08 | N738E | - | Jun 8, 19:00 UTC | Jun 8, 19:25 UTC | 25m |
| 2026-06-08 | N738E | - | Jun 8, 17:45 UTC | Jun 8, 18:15 UTC | 30m |
| 2026-06-03 | N738E | - | Jun 3, 21:45 UTC | Jun 3, 23:45 UTC | 2h 0m |
| 2026-06-03 | N738E | - | Jun 3, 17:00 UTC | Jun 3, 17:30 UTC | 30m |
| 2026-06-02 | N738E | - | Jun 2, 20:15 UTC | Jun 2, 20:25 UTC | 10m |
| 2026-06-02 | N738E | - | Jun 2, 15:40 UTC | Jun 2, 15:55 UTC | 15m |
| 2026-06-01 | N738E | - | Jun 1, 18:40 UTC | Jun 1, 20:30 UTC | 1h 50m |
| 2026-06-01 | N738E | - | Jun 1, 12:15 UTC | Jun 1, 14:10 UTC | 1h 55m |
| 2026-06-01 | N738E | - | Jun 1, 10:50 UTC | Jun 1, 11:15 UTC | 25m |
| 2026-05-27 | N738E | - | May 27, 22:05 UTC | May 27, 23:15 UTC | 1h 10m |
| 2026-05-27 | N738E | - | May 27, 19:45 UTC | May 27, 20:30 UTC | 45m |
| 2026-05-26 | N738E | - | May 26, 19:05 UTC | May 26, 21:09 UTC | 2h 5m |
| 2026-05-14 | N738E | - | May 14, 20:40 UTC | May 15, 00:20 UTC | 3h 40m |
| 2026-05-12 | N738E | - | May 12, 17:25 UTC | May 12, 21:55 UTC | 4h 30m |
| 2026-05-10 | N738E | - | May 10, 20:05 UTC | May 10, 20:54 UTC | 50m |
| 2026-05-10 | N738E | - | May 10, 18:35 UTC | May 10, 19:30 UTC | 55m |
| 2026-05-07 | N738E | - | May 7, 22:15 UTC | May 7, 22:40 UTC | 25m |
| 2026-05-07 | N738E | - | May 7, 21:25 UTC | May 7, 22:00 UTC | 35m |
| 2026-05-05 | N738E | - | May 5, 10:45 UTC | May 5, 11:25 UTC | 40m |
| 2026-05-04 | N738E | - | May 4, 19:50 UTC | May 4, 20:15 UTC | 25m |
| 2026-04-24 | N738E | - | Apr 24, 17:30 UTC | Apr 24, 20:40 UTC | 3h 10m |
| 2026-04-24 | N738E | - | Apr 24, 00:50 UTC | Apr 24, 06:25 UTC | 5h 35m |
| 2026-04-23 | N738E | - | Apr 23, 22:40 UTC | Apr 23, 23:05 UTC | 25m |
| 2026-04-23 | N738E | - | Apr 23, 00:20 UTC | Apr 23, 01:00 UTC | 40m |
| 2026-04-22 | N738E | - | Apr 22, 21:45 UTC | Apr 22, 23:45 UTC | 2h 0m |
| 2026-04-22 | N738E | DUB → BGR | Apr 22, 15:25 UTC | Apr 22, 21:05 UTC | 5h 40m |
| 2026-04-20 | N738E | - | Apr 20, 12:10 UTC | Apr 20, 21:40 UTC | 9h 30m |
| 2026-04-20 | N738E | - | Apr 20, 10:50 UTC | Apr 20, 11:00 UTC | 10m |
| 2026-04-19 | N738E | - | Apr 19, 16:30 UTC | Apr 19, 19:15 UTC | 2h 45m |
| 2026-04-16 | N738E | - | Apr 16, 21:14 UTC | Apr 16, 22:34 UTC | 1h 20m |
| 2026-04-16 | N738E | - | Apr 16, 20:20 UTC | Apr 16, 21:10 UTC | 50m |
| 2026-04-16 | N738E | - | Apr 16, 19:15 UTC | Apr 16, 19:30 UTC | 15m |
| 2026-04-16 | N738E | - | Apr 16, 17:15 UTC | Apr 16, 19:10 UTC | 1h 55m |
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 N738E page for operator, model, and routing details .