Apparatus

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sensors Mode-S transponder

A3DC4B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N348P · AEROSPATIALE AS-350 Ecureuil · operated by PHI HEALTH LLC

Hex
A3DC4B
Octal
50756113
Decimal
10,738,763
Country
US
Tail
N348P
Type
AS50
No current signal · last broadcast 2d ago
Flights observed
140
Distinct callsigns
1
Country
US
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S A3DC4B.

Country allocation

The ICAO 24-bit address A3DC4B 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 1 distinct

Callsign Airline Flights Last seen
N348P - 140 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 N348P - Jul 11, 18:05 UTCJul 11, 19:00 UTC55m
2026-07-11 N348P - Jul 11, 15:25 UTCJul 11, 16:25 UTC1h 0m
2026-07-08 N348P - Jul 8, 10:30 UTCJul 8, 12:20 UTC1h 50m
2026-07-08 N348P - Jul 8, 08:30 UTCJul 8, 09:35 UTC1h 5m
2026-07-05 N348P - Jul 5, 19:15 UTCJul 5, 19:45 UTC30m
2026-07-05 N348P - Jul 5, 18:05 UTCJul 5, 18:30 UTC25m
2026-07-05 N348P - Jul 5, 03:20 UTCJul 5, 04:30 UTC1h 10m
2026-07-04 N348P - Jul 4, 03:20 UTCJul 4, 04:50 UTC1h 30m
2026-07-03 N348P - Jul 3, 23:25 UTCJul 3, 23:45 UTC20m
2026-07-03 N348P - Jul 3, 22:15 UTCJul 3, 22:25 UTC10m
2026-07-03 N348P - Jul 3, 04:05 UTCJul 3, 04:35 UTC30m
2026-07-03 N348P - Jul 3, 02:40 UTCJul 3, 03:15 UTC35m
2026-07-03 N348P - Jul 3, 00:05 UTCJul 3, 00:20 UTC15m
2026-07-02 N348P - Jul 2, 23:10 UTCJul 2, 23:20 UTC10m
2026-07-02 N348P - Jul 2, 07:30 UTCJul 2, 08:55 UTC1h 25m
2026-07-02 N348P - Jul 2, 06:41 UTCJul 2, 07:00 UTC19m
2026-07-02 N348P - Jul 2, 03:55 UTCJul 2, 05:05 UTC1h 10m
2026-07-01 N348P - Jul 1, 22:10 UTCJul 1, 22:30 UTC20m
2026-07-01 N348P - Jul 1, 20:35 UTCJul 1, 20:45 UTC10m
2026-06-30 N348P - Jun 30, 15:50 UTCJun 30, 16:15 UTC25m
2026-06-30 N348P - Jun 30, 14:40 UTCJun 30, 14:50 UTC10m
2026-06-29 N348P - Jun 29, 23:49 UTCJun 30, 01:00 UTC1h 10m
2026-06-28 N348P - Jun 28, 08:34 UTCJun 28, 09:20 UTC45m
2026-06-28 N348P - Jun 28, 07:09 UTCJun 28, 07:29 UTC20m
2026-06-28 N348P - Jun 28, 02:29 UTCJun 28, 02:44 UTC15m
2026-06-28 N348P - Jun 28, 01:40 UTCJun 28, 01:55 UTC15m
2026-06-27 N348P - Jun 27, 16:04 UTCJun 27, 16:35 UTC30m
2026-06-27 N348P - Jun 27, 14:54 UTCJun 27, 15:19 UTC25m
2026-06-26 N348P - Jun 26, 22:05 UTCJun 26, 22:40 UTC35m
2026-06-26 N348P - Jun 26, 20:59 UTCJun 26, 21:10 UTC10m
2026-06-26 N348P - Jun 26, 18:04 UTCJun 26, 18:39 UTC35m
2026-06-26 N348P - Jun 26, 17:09 UTCJun 26, 17:19 UTC10m
2026-06-25 N348P - Jun 25, 00:49 UTCJun 25, 01:04 UTC15m
2026-06-24 N348P - Jun 24, 22:14 UTCJun 24, 22:35 UTC20m
2026-06-24 N348P - Jun 24, 04:10 UTCJun 24, 04:20 UTC10m
2026-06-24 N348P - Jun 24, 02:15 UTCJun 24, 02:30 UTC15m
2026-06-20 N348P - Jun 20, 07:19 UTCJun 20, 07:54 UTC35m
2026-06-19 N348P - Jun 19, 21:39 UTCJun 19, 21:59 UTC20m
2026-06-19 N348P - Jun 19, 20:44 UTCJun 19, 20:55 UTC10m
2026-06-19 N348P - Jun 19, 18:39 UTCJun 19, 18:59 UTC20m
2026-06-19 N348P - Jun 19, 15:44 UTCJun 19, 15:59 UTC15m
2026-06-18 N348P - Jun 18, 20:35 UTCJun 18, 21:00 UTC25m
2026-06-18 N348P - Jun 18, 19:35 UTCJun 18, 19:55 UTC20m
2026-06-16 N348P - Jun 16, 04:55 UTCJun 16, 05:15 UTC20m
2026-06-16 N348P - Jun 16, 03:50 UTCJun 16, 04:00 UTC10m
2026-06-14 N348P - Jun 14, 08:55 UTCJun 14, 09:35 UTC40m
2026-06-14 N348P - Jun 14, 08:05 UTCJun 14, 08:15 UTC10m
2026-06-13 N348P - Jun 13, 09:55 UTCJun 13, 10:10 UTC15m
2026-06-13 N348P - Jun 13, 08:10 UTCJun 13, 08:25 UTC15m
2026-06-13 N348P - Jun 13, 01:25 UTCJun 13, 02:50 UTC1h 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 N348P page for operator, model, and routing details .

Mode-S A3DC4B frequently asked

What is Mode-S code A3DC4B?
A3DC4B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N348P.
Where is Mode-S A3DC4B registered?
Mode-S code A3DC4B is allocated to United States (US). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is A3DC4B broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3DC4B, octal 50756113, decimal 10,738,763.
What flights does A3DC4B operate?
Mode-S A3DC4B has broadcast 1 distinct callsign, including N348P.