Apparatus

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sensors Mode-S transponder

A585CA

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N455MH · AIRBUS HELICOPTERS EC-145 · operated by MEMORIAL HERMANN HEALTH SYSTEM

Hex
A585CA
Octal
51302712
Decimal
10,847,690
Country
US
Tail
N455MH
Type
EC45
No current signal · last broadcast Jul 26, 11:10 UTC
Flights observed
158
Distinct callsigns
2
Country
US
Last broadcast
Jul 26, 11:10 UTC

Last known position

Most recent position reported by Mode-S A585CA.

Country allocation

The ICAO 24-bit address A585CA 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

Callsign Airline Flights Last seen
LIFE5 - 148 2026-07-26
RDK5 - 10 2026-06-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 LIFE5 - Jul 26, 10:55 UTCJul 26, 11:10 UTC15m
2026-07-26 LIFE5 - Jul 26, 05:00 UTCJul 26, 05:50 UTC50m
2026-07-25 LIFE5 - Jul 25, 18:50 UTCJul 25, 19:35 UTC45m
2026-07-25 LIFE5 - Jul 25, 08:55 UTCJul 25, 09:20 UTC25m
2026-07-25 LIFE5 - Jul 25, 06:15 UTCJul 25, 06:50 UTC35m
2026-07-24 LIFE5 - Jul 24, 21:30 UTCJul 24, 22:00 UTC30m
2026-07-24 LIFE5 - Jul 24, 20:30 UTCJul 24, 20:40 UTC10m
2026-07-24 LIFE5 - Jul 24, 05:20 UTCJul 24, 05:30 UTC10m
2026-07-24 LIFE5 - Jul 24, 04:05 UTCJul 24, 04:20 UTC15m
2026-07-22 LIFE5 - Jul 22, 14:30 UTCJul 22, 14:40 UTC10m
2026-07-22 LIFE5 - Jul 22, 13:00 UTCJul 22, 13:30 UTC30m
2026-07-22 LIFE5 - Jul 22, 12:10 UTCJul 22, 12:20 UTC10m
2026-07-21 LIFE5 - Jul 21, 16:15 UTCJul 21, 16:25 UTC10m
2026-07-20 LIFE5 - Jul 20, 16:30 UTCJul 20, 16:45 UTC15m
2026-07-20 LIFE5 - Jul 20, 04:40 UTCJul 20, 06:00 UTC1h 20m
2026-07-19 LIFE5 - Jul 19, 11:30 UTCJul 19, 13:00 UTC1h 30m
2026-07-19 LIFE5 - Jul 19, 10:15 UTCJul 19, 10:40 UTC25m
2026-07-19 LIFE5 - Jul 19, 06:15 UTCJul 19, 06:25 UTC10m
2026-07-18 LIFE5 - Jul 18, 22:50 UTCJul 18, 23:20 UTC30m
2026-07-18 LIFE5 - Jul 18, 19:40 UTCJul 18, 20:15 UTC35m
2026-07-18 LIFE5 - Jul 18, 08:45 UTCJul 18, 09:40 UTC55m
2026-07-17 LIFE5 - Jul 17, 07:30 UTCJul 17, 08:10 UTC40m
2026-07-17 LIFE5 - Jul 17, 02:59 UTCJul 17, 03:10 UTC10m
2026-07-16 LIFE5 - Jul 16, 14:45 UTCJul 16, 15:30 UTC45m
2026-07-16 LIFE5 - Jul 16, 10:10 UTCJul 16, 10:20 UTC10m
2026-07-16 LIFE5 - Jul 16, 03:10 UTCJul 16, 03:20 UTC10m
2026-07-16 LIFE5 - Jul 16, 00:30 UTCJul 16, 00:40 UTC10m
2026-07-15 LIFE5 - Jul 15, 07:10 UTCJul 15, 07:25 UTC15m
2026-07-15 LIFE5 - Jul 15, 03:40 UTCJul 15, 03:50 UTC10m
2026-07-15 LIFE5 - Jul 15, 02:55 UTCJul 15, 03:05 UTC10m
2026-07-14 LIFE5 - Jul 14, 21:45 UTCJul 14, 22:00 UTC15m
2026-07-14 LIFE5 - Jul 14, 20:35 UTCJul 14, 20:55 UTC20m
2026-07-14 LIFE5 - Jul 14, 04:00 UTCJul 14, 04:10 UTC10m
2026-07-14 LIFE5 - Jul 14, 02:50 UTCJul 14, 03:00 UTC10m
2026-07-13 LIFE5 - Jul 13, 02:05 UTCJul 13, 02:15 UTC10m
2026-07-11 LIFE5 - Jul 11, 10:15 UTCJul 11, 11:15 UTC1h 0m
2026-07-11 LIFE5 - Jul 11, 09:15 UTCJul 11, 09:40 UTC25m
2026-07-11 LIFE5 - Jul 11, 06:15 UTCJul 11, 06:45 UTC30m
2026-07-11 LIFE5 - Jul 11, 03:10 UTCJul 11, 03:20 UTC10m
2026-07-10 LIFE5 - Jul 10, 21:20 UTCJul 10, 22:00 UTC40m
2026-07-10 LIFE5 - Jul 10, 20:25 UTCJul 10, 20:35 UTC10m
2026-07-10 LIFE5 - Jul 10, 02:35 UTCJul 10, 03:30 UTC55m
2026-06-26 LIFE5 - Jun 26, 04:30 UTCJun 26, 04:39 UTC10m
2026-06-25 LIFE5 - Jun 25, 12:04 UTCJun 25, 12:15 UTC10m
2026-06-25 LIFE5 - Jun 25, 10:35 UTCJun 25, 11:15 UTC40m
2026-06-25 LIFE5 - Jun 25, 09:25 UTCJun 25, 09:45 UTC20m
2026-06-24 LIFE5 - Jun 24, 07:54 UTCJun 24, 08:39 UTC45m
2026-06-23 LIFE5 - Jun 23, 19:44 UTCJun 23, 20:19 UTC35m
2026-06-20 RDK5 - Jun 20, 09:34 UTCJun 20, 09:54 UTC20m
2026-06-20 LIFE5 - Jun 20, 05:39 UTCJun 20, 06:24 UTC45m

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 N455MH page for operator, model, and routing details .

Mode-S A585CA frequently asked

What is Mode-S code A585CA?
A585CA is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N455MH.
Where is Mode-S A585CA registered?
Mode-S code A585CA 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 A585CA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A585CA, octal 51302712, decimal 10,847,690.
What flights does A585CA operate?
Mode-S A585CA has broadcast 2 distinct callsigns, including LIFE5, RDK5.