sensors Mode-S transponder
A32BC4
ICAO 24-bit transponder address · allocated to United States
Currently assigned to N303PH · AIRBUS HELICOPTERS EC-135/635 · operated by PHI HEALTH LLC
- Hex
- A32BC4
- Octal
- 50625704
- Decimal
- 10,693,572
- Country
- US
- Tail
- N303PH
- Type
- EC35
- Flights observed
- 109
- Distinct callsigns
- 3
- Country
- US
- Last broadcast
- Jul 26, 14:20 UTC
Last known position
Country allocation
The ICAO 24-bit address A32BC4 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 3 distinct
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | N303PH | - | Jul 26, 13:55 UTC | Jul 26, 14:20 UTC | 25m |
| 2026-07-26 | N303PH | - | Jul 26, 06:40 UTC | Jul 26, 07:35 UTC | 55m |
| 2026-07-26 | N303PH | - | Jul 26, 03:30 UTC | Jul 26, 04:30 UTC | 1h 0m |
| 2026-07-26 | N303PH | - | Jul 26, 02:45 UTC | Jul 26, 03:05 UTC | 20m |
| 2026-07-24 | - | - | Jul 24, 21:20 UTC | Jul 24, 21:50 UTC | 30m |
| 2026-07-24 | N303PH | - | Jul 24, 20:10 UTC | Jul 24, 20:30 UTC | 20m |
| 2026-07-22 | N303PH | - | Jul 22, 23:50 UTC | Jul 23, 00:40 UTC | 50m |
| 2026-07-22 | - | - | Jul 22, 15:55 UTC | Jul 22, 16:15 UTC | 20m |
| 2026-07-19 | N303PH | - | Jul 19, 13:45 UTC | Jul 19, 13:55 UTC | 10m |
| 2026-07-17 | N303PH | - | Jul 17, 04:14 UTC | Jul 17, 04:39 UTC | 25m |
| 2026-07-15 | N303PH | - | Jul 15, 15:45 UTC | Jul 15, 16:25 UTC | 40m |
| 2026-07-14 | N303PH | SUS → SUS | Jul 14, 17:20 UTC | Jul 14, 18:25 UTC | 1h 5m |
| 2026-07-12 | N303PH | - | Jul 12, 03:10 UTC | Jul 12, 03:20 UTC | 10m |
| 2026-07-12 | N303PH | - | Jul 12, 02:05 UTC | Jul 12, 02:15 UTC | 10m |
| 2026-07-12 | N303PH | - | Jul 12, 01:05 UTC | Jul 12, 01:25 UTC | 20m |
| 2026-07-01 | N303PH | - | Jul 1, 02:40 UTC | Jul 1, 03:50 UTC | 1h 10m |
| 2026-06-29 | - | - | Jun 29, 23:09 UTC | Jun 29, 23:19 UTC | 10m |
| 2026-06-29 | - | - | Jun 29, 20:30 UTC | Jun 29, 20:49 UTC | 20m |
| 2026-06-25 | N303PH | - | Jun 25, 16:14 UTC | Jun 25, 16:24 UTC | 10m |
| 2026-06-25 | N303PH | - | Jun 25, 12:54 UTC | Jun 25, 13:20 UTC | 25m |
| 2026-06-25 | N303PH | - | Jun 25, 05:44 UTC | Jun 25, 07:05 UTC | 1h 20m |
| 2026-06-23 | N303PH | - | Jun 23, 06:49 UTC | Jun 23, 06:59 UTC | 10m |
| 2026-06-23 | N303PH | - | Jun 23, 03:49 UTC | Jun 23, 04:00 UTC | 10m |
| 2026-06-22 | N303PH | - | Jun 22, 21:19 UTC | Jun 22, 21:30 UTC | 10m |
| 2026-06-22 | N303PH | - | Jun 22, 17:55 UTC | Jun 22, 18:19 UTC | 25m |
| 2026-06-20 | N303PH | - | Jun 20, 23:39 UTC | Jun 20, 23:50 UTC | 10m |
| 2026-06-20 | N303PH | - | Jun 20, 22:39 UTC | Jun 20, 22:50 UTC | 10m |
| 2026-06-20 | N303PH | - | Jun 20, 21:10 UTC | Jun 20, 21:19 UTC | 10m |
| 2026-06-19 | - | - | Jun 19, 06:20 UTC | Jun 19, 06:29 UTC | 10m |
| 2026-06-19 | N303PH | - | Jun 19, 02:54 UTC | Jun 19, 03:09 UTC | 15m |
| 2026-06-18 | H303PH | SUS → SUS | Jun 18, 02:20 UTC | Jun 18, 02:40 UTC | 20m |
| 2026-06-12 | - | - | Jun 12, 18:20 UTC | Jun 12, 18:50 UTC | 30m |
| 2026-06-09 | N303PH | - | Jun 9, 02:15 UTC | Jun 9, 03:10 UTC | 55m |
| 2026-05-31 | N303PH | - | May 31, 15:20 UTC | May 31, 15:35 UTC | 15m |
| 2026-05-29 | N303PH | - | May 29, 00:15 UTC | May 29, 00:25 UTC | 10m |
| 2026-05-28 | N303PH | - | May 28, 21:50 UTC | May 28, 22:05 UTC | 15m |
| 2026-05-28 | N303PH | - | May 28, 11:10 UTC | May 28, 11:20 UTC | 10m |
| 2026-05-28 | N303PH | - | May 28, 10:00 UTC | May 28, 10:25 UTC | 25m |
| 2026-05-28 | N303PH | - | May 28, 08:15 UTC | May 28, 08:35 UTC | 20m |
| 2026-05-28 | N303PH | - | May 28, 04:15 UTC | May 28, 04:25 UTC | 10m |
| 2026-05-28 | N303PH | - | May 28, 00:05 UTC | May 28, 00:20 UTC | 15m |
| 2026-05-24 | - | - | May 24, 20:15 UTC | May 24, 20:55 UTC | 40m |
| 2026-05-24 | - | - | May 24, 18:00 UTC | May 24, 18:15 UTC | 15m |
| 2026-05-22 | N303PH | - | May 22, 17:20 UTC | May 22, 17:50 UTC | 30m |
| 2026-05-20 | N303PH | SUS → SUS | May 20, 16:10 UTC | May 20, 16:40 UTC | 30m |
| 2026-05-20 | N303PH | - | May 20, 13:30 UTC | May 20, 14:00 UTC | 30m |
| 2026-05-19 | N303PH | - | May 19, 15:15 UTC | May 19, 15:25 UTC | 10m |
| 2026-05-17 | N303PH | - | May 17, 22:55 UTC | May 17, 23:10 UTC | 15m |
| 2026-05-16 | N303PH | - | May 16, 12:11 UTC | May 16, 12:21 UTC | 10m |
| 2026-05-16 | N303PH | - | May 16, 07:16 UTC | May 16, 08:41 UTC | 1h 25m |
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 N303PH page for operator, model, and routing details .