Apparatus

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sensors Mode-S transponder

A1965B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N201GL · BEECH 1900 · operated by ALPINE AVIATION INC

Hex
A1965B
Octal
50313133
Decimal
10,589,787
Country
US
Tail
N201GL
Type
B190
No current signal · last broadcast 10h ago
Flights observed
105
Distinct callsigns
9
Country
US
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S A1965B.

Country allocation

The ICAO 24-bit address A1965B 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 9 distinct

Callsign Airline Flights Last seen
AIP1840 - 47 2026-07-17
AIP1839 - 45 2026-07-17
AIP601 Alpine Air Express 2 2026-06-01
AIP503 Alpine Air Express 2 2026-05-04
AIP434 Alpine Air Express 2 2026-04-22
AIP427 - 2 2026-04-20
AIP1832 Alpine Air Express 2 2026-06-08
AIP1831 Alpine Air Express 2 2026-06-09
AP1840 - 1 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 AIP1840 - Jul 17, 13:55 UTCJul 17, 14:20 UTC25m
2026-07-17 AIP1839 - Jul 17, 00:20 UTCJul 17, 01:00 UTC40m
2026-07-16 AIP1840 - Jul 16, 13:00 UTCJul 16, 13:25 UTC25m
2026-07-14 AIP1839 - Jul 14, 00:35 UTCJul 14, 01:15 UTC40m
2026-07-13 AIP1840 - Jul 13, 13:10 UTCJul 13, 13:35 UTC25m
2026-07-11 AIP1839 - Jul 11, 00:40 UTCJul 11, 01:20 UTC40m
2026-07-10 AIP1840 - Jul 10, 13:10 UTCJul 10, 13:35 UTC25m
2026-07-10 AIP1839 - Jul 10, 00:40 UTCJul 10, 01:15 UTC35m
2026-07-09 AIP1840 - Jul 9, 13:35 UTCJul 9, 14:00 UTC25m
2026-07-09 AIP1839 - Jul 9, 00:30 UTCJul 9, 01:05 UTC35m
2026-07-08 AIP1840 - Jul 8, 13:00 UTCJul 8, 13:25 UTC25m
2026-07-08 AIP1839 - Jul 8, 00:30 UTCJul 8, 01:15 UTC45m
2026-07-07 AIP1840 - Jul 7, 13:05 UTCJul 7, 13:30 UTC25m
2026-07-07 AIP1839 - Jul 7, 00:30 UTCJul 7, 01:10 UTC40m
2026-07-06 AIP1840 - Jul 6, 12:55 UTCJul 6, 13:20 UTC25m
2026-07-04 AIP1839 - Jul 4, 00:25 UTCJul 4, 01:05 UTC40m
2026-07-03 AIP1840 - Jul 3, 13:00 UTCJul 3, 13:25 UTC25m
2026-07-03 AIP1839 - Jul 3, 00:25 UTCJul 3, 01:00 UTC35m
2026-07-02 AIP1840 - Jul 2, 13:15 UTCJul 2, 13:40 UTC25m
2026-07-02 AIP1839 - Jul 2, 00:35 UTCJul 2, 01:05 UTC30m
2026-07-01 AIP1840 - Jul 1, 13:25 UTCJul 1, 13:55 UTC30m
2026-07-01 AIP1839 - Jul 1, 00:30 UTCJul 1, 01:00 UTC30m
2026-06-30 AIP1840 - Jun 30, 13:25 UTCJun 30, 13:45 UTC20m
2026-06-30 AIP1839 - Jun 30, 00:35 UTCJun 30, 01:14 UTC40m
2026-06-29 AIP1840 - Jun 29, 13:34 UTCJun 29, 13:59 UTC25m
2026-06-27 AIP1839 - Jun 27, 00:20 UTCJun 27, 01:00 UTC40m
2026-06-26 AIP1840 - Jun 26, 15:25 UTCJun 26, 15:54 UTC30m
2026-06-26 AIP1839 - Jun 26, 00:30 UTCJun 26, 00:59 UTC30m
2026-06-25 AIP1840 - Jun 25, 13:35 UTCJun 25, 14:09 UTC35m
2026-06-25 AIP1839 - Jun 25, 00:24 UTCJun 25, 01:04 UTC40m
2026-06-24 AP1840 - Jun 24, 13:50 UTCJun 24, 14:20 UTC30m
2026-06-24 AIP1839 - Jun 24, 00:34 UTCJun 24, 01:14 UTC40m
2026-06-23 AIP1840 - Jun 23, 13:19 UTCJun 23, 13:45 UTC25m
2026-06-23 AIP1839 - Jun 23, 00:39 UTCJun 23, 01:15 UTC35m
2026-06-22 AIP1840 - Jun 22, 13:29 UTCJun 22, 14:05 UTC35m
2026-06-20 AIP1839 - Jun 20, 00:39 UTCJun 20, 01:19 UTC40m
2026-06-19 AIP1840 - Jun 19, 13:29 UTCJun 19, 13:54 UTC25m
2026-06-19 AIP1839 - Jun 19, 00:34 UTCJun 19, 01:10 UTC35m
2026-06-18 AIP1840 - Jun 18, 13:15 UTCJun 18, 13:45 UTC30m
2026-06-18 AIP1839 - Jun 18, 00:35 UTCJun 18, 01:10 UTC35m
2026-06-17 AIP1840 - Jun 17, 13:10 UTCJun 17, 13:35 UTC25m
2026-06-17 AIP1839 - Jun 17, 00:30 UTCJun 17, 01:00 UTC30m
2026-06-16 AIP1840 - Jun 16, 13:40 UTCJun 16, 14:05 UTC25m
2026-06-16 AIP1839 - Jun 16, 00:35 UTCJun 16, 01:15 UTC40m
2026-06-15 AIP1840 - Jun 15, 20:59 UTCJun 15, 21:25 UTC25m
2026-06-13 AIP1839 JAC → SLC Jun 13, 00:25 UTCJun 13, 01:05 UTC40m
2026-06-12 AIP1840 SLC → JAC Jun 12, 13:25 UTCJun 12, 13:50 UTC25m
2026-06-12 AIP1839 JAC → SLC Jun 12, 00:30 UTCJun 12, 01:05 UTC35m
2026-06-11 AIP1840 SLC → JAC Jun 11, 13:25 UTCJun 11, 13:50 UTC25m
2026-06-11 AIP1839 JAC → SLC Jun 11, 00:25 UTCJun 11, 01:05 UTC40m

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 N201GL page for operator, model, and routing details .

Mode-S A1965B frequently asked

What is Mode-S code A1965B?
A1965B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N201GL.
Where is Mode-S A1965B registered?
Mode-S code A1965B 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 A1965B broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A1965B, octal 50313133, decimal 10,589,787.
What flights does A1965B operate?
Mode-S A1965B has broadcast 9 distinct callsigns, including AIP1840, AIP1839, AIP601, AIP503, AIP434.