Apparatus

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sensors Mode-S transponder

A864A7

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N64UC · BEECH 1900 · operated by ALPINE AVIATION INC

Hex
A864A7
Octal
52062247
Decimal
11,035,815
Country
US
Tail
N64UC
Type
B190
No current signal · last broadcast 3d ago
Flights observed
85
Distinct callsigns
11
Country
US
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S A864A7.

Country allocation

The ICAO 24-bit address A864A7 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
AIP1855 Alpine Air Express 31 2026-07-25
AIP1856 Alpine Air Express 29 2026-07-25
AIP1842 - 8 2026-06-26
AIP1841 - 8 2026-06-27
AIP1876 Alpine Air Express 2 2026-06-15
AIP1875 Alpine Air Express 2 2026-06-16
IP1856 - 1 2026-05-16
AIP9921 Alpine Air Express 1 2026-07-24
AIP91855 - 1 2026-07-25
AIP1801 Alpine Air Express 1 2026-04-22
9921 - 1 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 AIP1855 HDN → DEN Jul 25, 17:55 UTCJul 25, 18:35 UTC40m
2026-07-25 AIP1856 DEN → HDN Jul 25, 13:00 UTCJul 25, 13:20 UTC20m
2026-07-25 AIP91855 - Jul 25, 01:45 UTCJul 25, 02:20 UTC35m
2026-07-24 AIP9921 CYS → DEN Jul 24, 23:20 UTCJul 24, 23:40 UTC20m
2026-07-24 9921 - Jul 24, 15:10 UTCJul 24, 15:30 UTC20m
2026-07-24 AIP1856 DEN → HDN Jul 24, 13:00 UTCJul 24, 13:25 UTC25m
2026-07-24 AIP1855 HDN → DEN Jul 24, 01:40 UTCJul 24, 02:05 UTC25m
2026-07-23 AIP1856 DEN → HDN Jul 23, 13:00 UTCJul 23, 13:25 UTC25m
2026-07-23 AIP1855 HDN → DEN Jul 23, 02:10 UTCJul 23, 02:50 UTC40m
2026-07-22 AIP1856 DEN → HDN Jul 22, 12:45 UTCJul 22, 13:10 UTC25m
2026-07-22 AIP1855 HDN → DEN Jul 22, 01:35 UTCJul 22, 02:25 UTC50m
2026-07-21 AIP1856 DEN → HDN Jul 21, 13:30 UTCJul 21, 13:55 UTC25m
2026-07-21 AIP1855 - Jul 21, 01:30 UTCJul 21, 02:00 UTC30m
2026-07-21 AIP1856 DEN → HDN Jul 21, 00:05 UTCJul 21, 00:35 UTC30m
2026-07-11 AIP1855 - Jul 11, 16:05 UTCJul 11, 16:40 UTC35m
2026-07-11 AIP1856 - Jul 11, 14:25 UTCJul 11, 14:50 UTC25m
2026-07-11 AIP1855 - Jul 11, 01:40 UTCJul 11, 02:05 UTC25m
2026-07-10 AIP1856 - Jul 10, 13:00 UTCJul 10, 13:20 UTC20m
2026-07-10 AIP1855 - Jul 10, 02:10 UTCJul 10, 02:40 UTC30m
2026-07-09 AIP1856 - Jul 9, 12:45 UTCJul 9, 13:10 UTC25m
2026-07-09 AIP1855 - Jul 9, 01:55 UTCJul 9, 02:15 UTC20m
2026-07-08 AIP1856 - Jul 8, 13:15 UTCJul 8, 13:40 UTC25m
2026-06-27 AIP1841 - Jun 27, 01:09 UTCJun 27, 01:49 UTC40m
2026-06-26 AIP1842 - Jun 26, 12:50 UTCJun 26, 13:45 UTC55m
2026-06-26 AIP1855 - Jun 26, 01:50 UTCJun 26, 02:14 UTC25m
2026-06-25 AIP1856 - Jun 25, 13:35 UTCJun 25, 13:55 UTC20m
2026-06-25 AIP1855 - Jun 25, 01:40 UTCJun 25, 02:05 UTC25m
2026-06-24 AIP1856 - Jun 24, 13:44 UTCJun 24, 14:09 UTC25m
2026-06-24 AIP1855 - Jun 24, 01:34 UTCJun 24, 02:00 UTC25m
2026-06-23 AIP1856 - Jun 23, 13:24 UTCJun 23, 13:50 UTC25m
2026-06-23 AIP1855 - Jun 23, 01:35 UTCJun 23, 01:54 UTC20m
2026-06-22 AIP1856 - Jun 22, 23:14 UTCJun 22, 23:45 UTC30m
2026-06-20 AIP1855 - Jun 20, 15:44 UTCJun 20, 16:24 UTC40m
2026-06-20 AIP1841 - Jun 20, 01:14 UTCJun 20, 01:55 UTC40m
2026-06-19 AIP1842 DEN → SLT Jun 19, 13:09 UTCJun 19, 14:15 UTC1h 5m
2026-06-19 AIP1855 - Jun 19, 01:34 UTCJun 19, 02:04 UTC30m
2026-06-18 AIP1856 - Jun 18, 13:20 UTCJun 18, 13:50 UTC30m
2026-06-16 AIP1875 DEN → GJT Jun 16, 01:25 UTCJun 16, 02:00 UTC35m
2026-06-15 AIP1876 DEN → GJT Jun 15, 23:04 UTCJun 15, 23:30 UTC25m
2026-06-13 AIP1855 HDN → DEN Jun 13, 15:00 UTCJun 13, 15:30 UTC30m
2026-06-13 AIP1856 - Jun 13, 13:10 UTCJun 13, 13:35 UTC25m
2026-06-13 AIP1841 ALS → DEN Jun 13, 01:15 UTCJun 13, 01:55 UTC40m
2026-06-12 AIP1842 DEN → SLT Jun 12, 14:01 UTCJun 12, 15:05 UTC1h 5m
2026-06-12 AIP1841 ALS → DEN Jun 12, 01:00 UTCJun 12, 01:40 UTC40m
2026-06-11 AIP1842 DEN → SLT Jun 11, 13:35 UTCJun 11, 14:30 UTC55m
2026-06-11 AIP1855 HDN → DEN Jun 11, 01:45 UTCJun 11, 02:25 UTC40m
2026-06-10 AIP1856 DEN → HDN Jun 10, 13:30 UTCJun 10, 14:00 UTC30m
2026-06-09 AIP1855 HDN → DEN Jun 9, 03:15 UTCJun 9, 03:45 UTC30m
2026-06-08 AIP1856 DEN → HDN Jun 8, 23:00 UTCJun 8, 23:30 UTC30m
2026-06-06 AIP1855 HDN → DEN Jun 6, 14:54 UTCJun 6, 15:30 UTC35m

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 N64UC page for operator, model, and routing details .

Mode-S A864A7 frequently asked

What is Mode-S code A864A7?
A864A7 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N64UC.
Where is Mode-S A864A7 registered?
Mode-S code A864A7 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 A864A7 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A864A7, octal 52062247, decimal 11,035,815.
What flights does A864A7 operate?
Mode-S A864A7 has broadcast 11 distinct callsigns, including AIP1855, AIP1856, AIP1842, AIP1841, AIP1876.