Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

ACA738

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N914TH · AIRBUS HELICOPTERS EC-135/635 · operated by AIR METHODS LLC

Hex
ACA738
Octal
53123470
Decimal
11,315,000
Country
US
Tail
N914TH
Type
EC35
No current signal · last broadcast 2h ago
Flights observed
197
Distinct callsigns
1
Country
US
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S ACA738.

Country allocation

The ICAO 24-bit address ACA738 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
N914TH - 197 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 N914TH - Jul 25, 21:50 UTCJul 25, 22:05 UTC15m
2026-07-25 N914TH - Jul 25, 20:20 UTCJul 25, 21:05 UTC45m
2026-07-25 N914TH - Jul 25, 18:00 UTCJul 25, 18:20 UTC20m
2026-07-25 N914TH - Jul 25, 17:20 UTCJul 25, 17:30 UTC10m
2026-07-25 N914TH - Jul 25, 16:35 UTCJul 25, 16:45 UTC10m
2026-07-24 N914TH - Jul 24, 22:40 UTCJul 24, 23:05 UTC25m
2026-07-24 N914TH - Jul 24, 21:50 UTCJul 24, 22:05 UTC15m
2026-07-24 N914TH - Jul 24, 12:00 UTCJul 24, 12:40 UTC40m
2026-07-23 N914TH - Jul 23, 02:30 UTCJul 23, 03:25 UTC55m
2026-07-22 N914TH - Jul 22, 23:55 UTCJul 23, 00:25 UTC30m
2026-07-22 N914TH - Jul 22, 16:25 UTCJul 22, 16:55 UTC30m
2026-07-22 N914TH - Jul 22, 14:35 UTCJul 22, 14:45 UTC10m
2026-07-21 N914TH - Jul 21, 07:15 UTCJul 21, 07:30 UTC15m
2026-07-21 N914TH - Jul 21, 06:25 UTCJul 21, 06:35 UTC10m
2026-07-21 N914TH - Jul 21, 04:50 UTCJul 21, 05:20 UTC30m
2026-07-20 N914TH - Jul 20, 05:55 UTCJul 20, 06:55 UTC1h 0m
2026-07-20 N914TH - Jul 20, 05:00 UTCJul 20, 05:15 UTC15m
2026-07-20 N914TH - Jul 20, 03:25 UTCJul 20, 03:55 UTC30m
2026-07-20 N914TH - Jul 20, 01:40 UTCJul 20, 01:50 UTC10m
2026-07-19 N914TH - Jul 19, 22:25 UTCJul 19, 23:15 UTC50m
2026-07-19 N914TH - Jul 19, 04:05 UTCJul 19, 04:15 UTC10m
2026-07-18 N914TH - Jul 18, 12:00 UTCJul 18, 12:15 UTC15m
2026-07-17 N914TH - Jul 17, 11:15 UTCJul 17, 11:25 UTC10m
2026-07-14 N914TH - Jul 14, 03:30 UTCJul 14, 04:25 UTC55m
2026-07-14 N914TH - Jul 14, 03:05 UTCJul 14, 03:15 UTC10m
2026-07-14 N914TH - Jul 14, 00:15 UTCJul 14, 00:25 UTC10m
2026-07-13 N914TH - Jul 13, 11:45 UTCJul 13, 11:55 UTC10m
2026-07-13 N914TH - Jul 13, 01:45 UTCJul 13, 02:05 UTC20m
2026-07-13 N914TH - Jul 13, 00:40 UTCJul 13, 01:01 UTC20m
2026-07-12 N914TH - Jul 12, 23:25 UTCJul 13, 00:05 UTC40m
2026-07-12 N914TH - Jul 12, 16:25 UTCJul 12, 17:25 UTC1h 0m
2026-07-12 N914TH - Jul 12, 14:01 UTCJul 12, 14:50 UTC50m
2026-07-11 N914TH - Jul 11, 04:10 UTCJul 11, 04:20 UTC10m
2026-07-09 N914TH - Jul 9, 10:55 UTCJul 9, 11:05 UTC10m
2026-07-09 N914TH - Jul 9, 09:30 UTCJul 9, 10:20 UTC50m
2026-07-09 N914TH - Jul 9, 07:50 UTCJul 9, 08:00 UTC10m
2026-07-07 N914TH - Jul 7, 20:45 UTCJul 7, 20:55 UTC10m
2026-07-05 N914TH - Jul 5, 09:35 UTCJul 5, 10:40 UTC1h 5m
2026-07-05 N914TH - Jul 5, 08:20 UTCJul 5, 08:50 UTC30m
2026-07-04 N914TH - Jul 4, 22:10 UTCJul 4, 22:20 UTC10m
2026-07-04 N914TH - Jul 4, 21:25 UTCJul 4, 21:45 UTC20m
2026-07-04 N914TH - Jul 4, 04:35 UTCJul 4, 05:15 UTC40m
2026-07-04 N914TH - Jul 4, 04:20 UTCJul 4, 04:30 UTC10m
2026-07-04 N914TH - Jul 4, 03:10 UTCJul 4, 03:25 UTC15m
2026-07-03 N914TH - Jul 3, 16:00 UTCJul 3, 16:40 UTC40m
2026-07-03 N914TH - Jul 3, 15:45 UTCJul 3, 15:55 UTC10m
2026-07-03 N914TH - Jul 3, 14:55 UTCJul 3, 15:05 UTC10m
2026-07-03 N914TH - Jul 3, 07:15 UTCJul 3, 07:35 UTC20m
2026-07-03 N914TH - Jul 3, 06:30 UTCJul 3, 06:40 UTC10m
2026-07-02 N914TH - Jul 2, 07:20 UTCJul 2, 07:50 UTC30m

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 N914TH page for operator, model, and routing details .

Mode-S ACA738 frequently asked

What is Mode-S code ACA738?
ACA738 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N914TH.
Where is Mode-S ACA738 registered?
Mode-S code ACA738 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 ACA738 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ACA738, octal 53123470, decimal 11,315,000.
What flights does ACA738 operate?
Mode-S ACA738 has broadcast 1 distinct callsign, including N914TH.