Apparatus

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sensors Mode-S transponder

A6E327

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N543AX · operated by ALPINE AVIATION INC

Hex
A6E327
Octal
51561447
Decimal
10,937,127
Country
US
Tail
N543AX
Type
B190
No current signal · last broadcast Jul 25, 20:00 UTC
Flights observed
75
Distinct callsigns
11
Country
US
Last broadcast
Jul 25, 20:00 UTC

Last known position

Most recent position reported by Mode-S A6E327.

Country allocation

The ICAO 24-bit address A6E327 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 11 distinct

Callsign Airline Flights Last seen
AIP1604 - 18 2026-07-17
AIP1603 - 18 2026-07-17
AIP1044 - 12 2026-07-18
AIP1587 - 8 2026-07-07
AIP1588 - 6 2026-07-02
AIP727 Alpine Air Express 4 2026-07-23
AIP9901 Alpine Air Express 3 2026-07-25
AIP723 Alpine Air Express 2 2026-07-21
AIP311 Alpine Air Express 2 2026-05-06
AIP8941 Alpine Air Express 1 2026-05-14
AIP223 Alpine Air Express 1 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 AIP9901 PAE → SLC Jul 25, 19:35 UTCJul 25, 20:00 UTC25m
2026-07-25 AIP9901 PAE → SLC Jul 25, 18:10 UTCJul 25, 18:40 UTC30m
2026-07-23 AIP727 MQY → SDF Jul 23, 00:20 UTCJul 23, 00:35 UTC15m
2026-07-22 AIP727 MQY → SDF Jul 22, 22:20 UTCJul 22, 23:30 UTC1h 10m
2026-07-22 AIP727 MQY → SDF Jul 22, 17:20 UTCJul 22, 21:15 UTC3h 55m
2026-07-22 AIP727 MQY → SDF Jul 22, 14:20 UTCJul 22, 15:00 UTC40m
2026-07-21 AIP723 RBD → LRD Jul 21, 08:05 UTCJul 21, 11:30 UTC3h 25m
2026-07-21 AIP723 RBD → LRD Jul 21, 05:45 UTCJul 21, 07:15 UTC1h 30m
2026-07-19 AIP9901 PAE → SLC Jul 19, 16:00 UTCJul 19, 18:40 UTC2h 40m
2026-07-18 AIP1044 - Jul 18, 20:15 UTCJul 18, 21:20 UTC1h 5m
2026-07-18 AIP1044 - Jul 18, 12:50 UTCJul 18, 13:55 UTC1h 5m
2026-07-17 AIP1604 - Jul 17, 14:15 UTCJul 17, 16:10 UTC1h 55m
2026-07-17 AIP1603 - Jul 17, 11:35 UTCJul 17, 12:35 UTC1h 0m
2026-07-15 AIP1604 - Jul 15, 14:05 UTCJul 15, 15:00 UTC55m
2026-07-15 AIP1603 - Jul 15, 11:50 UTCJul 15, 12:45 UTC55m
2026-07-14 AIP1604 - Jul 14, 13:55 UTCJul 14, 15:00 UTC1h 5m
2026-07-14 AIP1603 - Jul 14, 11:40 UTCJul 14, 12:40 UTC1h 0m
2026-07-11 AIP1044 - Jul 11, 19:25 UTCJul 11, 20:15 UTC50m
2026-07-11 AIP1044 - Jul 11, 13:55 UTCJul 11, 14:50 UTC55m
2026-07-10 AIP1604 - Jul 10, 14:50 UTCJul 10, 15:45 UTC55m
2026-07-10 AIP1603 - Jul 10, 12:40 UTCJul 10, 13:40 UTC1h 0m
2026-07-09 AIP1604 - Jul 9, 14:15 UTCJul 9, 15:10 UTC55m
2026-07-09 AIP1603 - Jul 9, 11:55 UTCJul 9, 12:50 UTC55m
2026-07-08 AIP1604 - Jul 8, 14:20 UTCJul 8, 15:10 UTC50m
2026-07-08 AIP1603 - Jul 8, 11:45 UTCJul 8, 12:55 UTC1h 10m
2026-07-07 AIP1604 - Jul 7, 14:30 UTCJul 7, 15:20 UTC50m
2026-07-07 AIP1603 - Jul 7, 11:15 UTCJul 7, 12:15 UTC1h 0m
2026-07-07 AIP1587 - Jul 7, 00:45 UTCJul 7, 01:35 UTC50m
2026-07-06 AIP1044 - Jul 6, 22:35 UTCJul 6, 23:30 UTC55m
2026-07-03 AIP1587 - Jul 3, 00:50 UTCJul 3, 01:55 UTC1h 5m
2026-07-02 AIP1588 - Jul 2, 11:30 UTCJul 2, 12:30 UTC1h 0m
2026-07-02 AIP1587 - Jul 2, 00:45 UTCJul 2, 01:35 UTC50m
2026-07-01 AIP1588 - Jul 1, 12:20 UTCJul 1, 13:20 UTC1h 0m
2026-06-30 AIP1604 RAP → FSD Jun 30, 14:35 UTCJun 30, 15:30 UTC55m
2026-06-30 AIP1603 - Jun 30, 12:05 UTCJun 30, 13:15 UTC1h 10m
2026-06-30 AIP1587 - Jun 30, 00:49 UTCJun 30, 01:40 UTC51m
2026-06-29 AIP1044 - Jun 29, 22:15 UTCJun 29, 23:19 UTC1h 5m
2026-06-26 AIP1604 RAP → FSD Jun 26, 17:35 UTCJun 26, 18:29 UTC55m
2026-06-26 AIP1603 - Jun 26, 13:40 UTCJun 26, 14:44 UTC1h 5m
2026-06-25 AIP1604 RAP → FSD Jun 25, 14:14 UTCJun 25, 15:04 UTC50m
2026-06-25 AIP1603 - Jun 25, 11:44 UTCJun 25, 12:44 UTC1h 0m
2026-06-19 AIP1604 RAP → FSD Jun 19, 14:09 UTCJun 19, 14:59 UTC50m
2026-06-19 AIP1603 - Jun 19, 11:49 UTCJun 19, 12:59 UTC1h 10m
2026-06-17 AIP1604 RAP → FSD Jun 17, 14:05 UTCJun 17, 14:50 UTC45m
2026-06-17 AIP1603 FSD → RAP Jun 17, 11:40 UTCJun 17, 12:55 UTC1h 15m
2026-06-16 AIP1604 RAP → FSD Jun 16, 14:05 UTCJun 16, 15:00 UTC55m
2026-06-16 AIP1603 FSD → RAP Jun 16, 12:00 UTCJun 16, 13:04 UTC1h 5m
2026-06-16 AIP1587 - Jun 16, 00:55 UTCJun 16, 01:45 UTC50m
2026-06-15 AIP1588 - Jun 15, 22:35 UTCJun 15, 23:39 UTC1h 5m
2026-06-13 AIP1044 FSD → RAP Jun 13, 20:00 UTCJun 13, 20:50 UTC50m

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 N543AX page for operator, model, and routing details .

Mode-S A6E327 frequently asked

What is Mode-S code A6E327?
A6E327 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N543AX.
Where is Mode-S A6E327 registered?
Mode-S code A6E327 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 A6E327 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 20:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6E327, octal 51561447, decimal 10,937,127.
What flights does A6E327 operate?
Mode-S A6E327 has broadcast 11 distinct callsigns, including AIP1604, AIP1603, AIP1044, AIP1587, AIP1588.