Apparatus

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sensors Mode-S transponder

A37AC2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N323PH · AIRBUS HELICOPTERS EC-135/635 · operated by PHI HEALTH LLC

Hex
A37AC2
Octal
50675302
Decimal
10,713,794
Country
US
Tail
N323PH
Type
EC35
No current signal · last broadcast 6d ago
Flights observed
216
Distinct callsigns
1
Country
US
Last broadcast
6d ago

Last known position

Most recent position reported by Mode-S A37AC2.

Country allocation

The ICAO 24-bit address A37AC2 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
N323PH - 179 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 - - Jul 26, 21:30 UTCJul 26, 21:45 UTC15m
2026-07-26 - - Jul 26, 19:35 UTCJul 26, 20:05 UTC30m
2026-07-25 N323PH - Jul 25, 05:15 UTCJul 25, 06:00 UTC45m
2026-07-25 N323PH - Jul 25, 03:15 UTCJul 25, 04:00 UTC45m
2026-07-24 N323PH - Jul 24, 23:55 UTCJul 25, 00:05 UTC10m
2026-07-24 N323PH - Jul 24, 10:30 UTCJul 24, 10:45 UTC15m
2026-07-24 N323PH - Jul 24, 02:30 UTCJul 24, 02:50 UTC20m
2026-07-23 N323PH - Jul 23, 23:50 UTCJul 24, 00:15 UTC25m
2026-07-22 N323PH - Jul 22, 21:50 UTCJul 22, 22:15 UTC25m
2026-07-22 N323PH - Jul 22, 19:15 UTCJul 22, 19:30 UTC15m
2026-07-21 N323PH - Jul 21, 00:15 UTCJul 21, 00:45 UTC30m
2026-07-20 N323PH - Jul 20, 23:00 UTCJul 20, 23:40 UTC40m
2026-07-20 N323PH - Jul 20, 20:30 UTCJul 20, 20:40 UTC10m
2026-07-20 N323PH - Jul 20, 10:20 UTCJul 20, 10:30 UTC10m
2026-07-19 N323PH - Jul 19, 05:05 UTCJul 19, 05:30 UTC25m
2026-07-19 N323PH - Jul 19, 03:40 UTCJul 19, 04:15 UTC35m
2026-07-18 N323PH - Jul 18, 14:15 UTCJul 18, 14:45 UTC30m
2026-07-18 N323PH - Jul 18, 12:00 UTCJul 18, 12:45 UTC45m
2026-07-18 N323PH - Jul 18, 08:50 UTCJul 18, 09:15 UTC25m
2026-07-18 N323PH - Jul 18, 06:50 UTCJul 18, 07:35 UTC45m
2026-07-18 N323PH - Jul 18, 04:25 UTCJul 18, 05:55 UTC1h 30m
2026-07-17 N323PH - Jul 17, 22:29 UTCJul 17, 22:40 UTC10m
2026-07-17 N323PH - Jul 17, 20:15 UTCJul 17, 20:29 UTC15m
2026-07-17 N323PH - Jul 17, 18:10 UTCJul 17, 19:20 UTC1h 10m
2026-07-17 N323PH - Jul 17, 16:44 UTCJul 17, 16:55 UTC10m
2026-07-17 N323PH - Jul 17, 16:00 UTCJul 17, 16:10 UTC10m
2026-07-16 - - Jul 16, 08:15 UTCJul 16, 08:30 UTC15m
2026-07-16 - - Jul 16, 06:30 UTCJul 16, 07:00 UTC30m
2026-07-16 - - Jul 16, 04:20 UTCJul 16, 04:50 UTC30m
2026-07-16 - - Jul 16, 03:00 UTCJul 16, 03:20 UTC20m
2026-07-15 N323PH - Jul 15, 15:25 UTCJul 15, 15:35 UTC10m
2026-07-15 N323PH - Jul 15, 13:30 UTCJul 15, 13:40 UTC10m
2026-07-14 N323PH - Jul 14, 16:50 UTCJul 14, 17:10 UTC20m
2026-07-14 N323PH - Jul 14, 14:40 UTCJul 14, 15:10 UTC30m
2026-07-12 N323PH - Jul 12, 20:10 UTCJul 12, 20:50 UTC40m
2026-07-12 N323PH - Jul 12, 18:20 UTCJul 12, 18:35 UTC15m
2026-07-12 - - Jul 12, 03:20 UTCJul 12, 05:01 UTC1h 40m
2026-07-12 - - Jul 12, 01:00 UTCJul 12, 02:05 UTC1h 5m
2026-07-10 N323PH - Jul 10, 22:00 UTCJul 10, 22:25 UTC25m
2026-07-10 N323PH - Jul 10, 19:25 UTCJul 10, 20:10 UTC45m
2026-07-10 N323PH - Jul 10, 15:30 UTCJul 10, 16:00 UTC30m
2026-07-10 N323PH - Jul 10, 13:10 UTCJul 10, 13:35 UTC25m
2026-07-07 N323PH - Jul 7, 21:00 UTCJul 7, 21:45 UTC45m
2026-07-07 N323PH - Jul 7, 19:00 UTCJul 7, 19:50 UTC50m
2026-07-07 N323PH - Jul 7, 05:55 UTCJul 7, 06:35 UTC40m
2026-07-07 N323PH - Jul 7, 04:00 UTCJul 7, 04:35 UTC35m
2026-07-06 N323PH - Jul 6, 17:30 UTCJul 6, 17:55 UTC25m
2026-07-06 N323PH - Jul 6, 15:05 UTCJul 6, 15:40 UTC35m
2026-07-06 N323PH - Jul 6, 13:30 UTCJul 6, 14:15 UTC45m
2026-07-06 N323PH - Jul 6, 00:10 UTCJul 6, 00:20 UTC10m

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 N323PH page for operator, model, and routing details .

Mode-S A37AC2 frequently asked

What is Mode-S code A37AC2?
A37AC2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N323PH.
Where is Mode-S A37AC2 registered?
Mode-S code A37AC2 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 A37AC2 broadcasting right now?
No active broadcast right now. Last signal was 6d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A37AC2, octal 50675302, decimal 10,713,794.
What flights does A37AC2 operate?
Mode-S A37AC2 has broadcast 1 distinct callsign, including N323PH.