Apparatus

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sensors Mode-S transponder

A28355

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N261GL · BEECH 1900 · operated by ALPINE AVIATION INC

Hex
A28355
Octal
50501525
Decimal
10,650,453
Country
US
Tail
N261GL
Type
B190
No current signal · last broadcast 5h ago
Flights observed
125
Distinct callsigns
18
Country
US
Last broadcast
5h ago

Last known position

Most recent position reported by Mode-S A28355.

Country allocation

The ICAO 24-bit address A28355 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 18 distinct

Callsign Airline Flights Last seen
AIP1563 - 14 2026-07-02
AIP1541 Alpine Air Express 14 2026-06-13
AIP1407 Alpine Air Express 13 2026-05-16
AIP1522 Alpine Air Express 12 2026-04-24
AIP1542 Alpine Air Express 11 2026-06-06
AIP1564 - 10 2026-07-02
AIP1408 Alpine Air Express 10 2026-05-16
AIP1521 Alpine Air Express 9 2026-04-24
AIP1566 - 7 2026-06-20
AIP1565 - 7 2026-06-20
AIP1604 Alpine Air Express 4 2026-07-03
AIP1603 - 4 2026-07-03
AIP1587 - 3 2026-07-14
AIP1577 - 2 2026-07-03
AIP1044 - 2 2026-07-13
AIP308 Alpine Air Express 1 2026-04-24
AIP1588 Alpine Air Express 1 2026-06-12
AIP1578 Alpine Air Express 1 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 AIP1587 - Jul 14, 00:50 UTCJul 14, 01:45 UTC55m
2026-07-13 AIP1044 - Jul 13, 22:45 UTCJul 13, 23:40 UTC55m
2026-07-03 AIP1604 RAP → FSD Jul 3, 14:20 UTCJul 3, 15:00 UTC40m
2026-07-03 AIP1603 - Jul 3, 11:50 UTCJul 3, 12:45 UTC55m
2026-07-03 AIP1577 - Jul 3, 01:35 UTCJul 3, 02:10 UTC35m
2026-07-02 AIP1563 - Jul 2, 12:00 UTCJul 2, 12:35 UTC35m
2026-07-02 AIP1564 - Jul 2, 00:30 UTCJul 2, 00:40 UTC10m
2026-07-01 AIP1563 - Jul 1, 22:55 UTCJul 1, 23:10 UTC15m
2026-07-01 AIP1563 - Jul 1, 13:30 UTCJul 1, 14:00 UTC30m
2026-07-01 AIP1563 - Jul 1, 11:50 UTCJul 1, 12:25 UTC35m
2026-07-01 AIP1564 - Jul 1, 00:30 UTCJul 1, 00:45 UTC15m
2026-06-30 AIP1563 - Jun 30, 22:55 UTCJun 30, 23:20 UTC25m
2026-06-30 AIP1563 - Jun 30, 12:45 UTCJun 30, 13:20 UTC35m
2026-06-30 AIP1564 - Jun 30, 00:25 UTCJun 30, 00:39 UTC15m
2026-06-29 AIP1564 - Jun 29, 21:54 UTCJun 29, 22:05 UTC10m
2026-06-27 AIP1564 - Jun 27, 00:20 UTCJun 27, 00:34 UTC15m
2026-06-26 AIP1563 - Jun 26, 22:25 UTCJun 26, 22:44 UTC20m
2026-06-26 AIP1563 - Jun 26, 15:05 UTCJun 26, 15:34 UTC30m
2026-06-26 AIP1564 - Jun 26, 00:15 UTCJun 26, 00:30 UTC15m
2026-06-25 AIP1563 - Jun 25, 22:24 UTCJun 25, 22:49 UTC25m
2026-06-25 AIP1563 - Jun 25, 16:59 UTCJun 25, 17:25 UTC25m
2026-06-25 AIP1564 - Jun 25, 00:19 UTCJun 25, 00:40 UTC20m
2026-06-24 AIP1563 - Jun 24, 22:29 UTCJun 24, 22:55 UTC25m
2026-06-24 AIP1563 - Jun 24, 12:25 UTCJun 24, 12:54 UTC30m
2026-06-24 AIP1564 - Jun 24, 00:20 UTCJun 24, 00:30 UTC10m
2026-06-23 AIP1563 - Jun 23, 22:25 UTCJun 23, 22:49 UTC25m
2026-06-23 AIP1563 - Jun 23, 11:49 UTCJun 23, 12:25 UTC35m
2026-06-23 AIP1564 - Jun 23, 00:35 UTCJun 23, 00:45 UTC10m
2026-06-22 AIP1564 - Jun 22, 21:35 UTCJun 22, 21:49 UTC15m
2026-06-20 AIP1566 - Jun 20, 15:04 UTCJun 20, 15:34 UTC30m
2026-06-20 AIP1565 - Jun 20, 12:30 UTCJun 20, 13:24 UTC55m
2026-06-19 AIP1566 - Jun 19, 23:44 UTCJun 20, 00:19 UTC35m
2026-06-19 AIP1565 - Jun 19, 11:54 UTCJun 19, 12:34 UTC40m
2026-06-18 AIP1566 - Jun 18, 23:45 UTCJun 19, 00:24 UTC39m
2026-06-18 AIP1565 - Jun 18, 17:30 UTCJun 18, 18:05 UTC35m
2026-06-17 AIP1566 - Jun 17, 23:45 UTCJun 18, 00:20 UTC35m
2026-06-17 AIP1565 - Jun 17, 12:15 UTCJun 17, 12:55 UTC40m
2026-06-16 AIP1566 XWA → FAR Jun 16, 23:45 UTCJun 17, 00:20 UTC35m
2026-06-16 AIP1565 - Jun 16, 11:45 UTCJun 16, 12:39 UTC55m
2026-06-16 AIP1566 XWA → FAR Jun 16, 00:00 UTCJun 16, 00:40 UTC40m
2026-06-15 AIP1565 - Jun 15, 21:30 UTCJun 15, 21:55 UTC25m
2026-06-13 AIP1541 BIS → FAR Jun 13, 22:35 UTCJun 13, 23:20 UTC45m
2026-06-13 AIP1587 RAP → FSD Jun 13, 00:50 UTCJun 13, 01:40 UTC50m
2026-06-12 AIP1588 FSD → RAP Jun 12, 11:25 UTCJun 12, 12:30 UTC1h 5m
2026-06-11 AIP1604 RAP → FSD Jun 11, 14:45 UTCJun 11, 15:35 UTC50m
2026-06-11 AIP1603 FSD → RAP Jun 11, 11:50 UTCJun 11, 12:40 UTC50m
2026-06-10 AIP1604 RAP → FSD Jun 10, 14:10 UTCJun 10, 14:55 UTC45m
2026-06-10 AIP1603 FSD → RAP Jun 10, 11:30 UTCJun 10, 12:30 UTC1h 0m
2026-06-09 AIP1587 RAP → FSD Jun 9, 00:50 UTCJun 9, 01:35 UTC45m
2026-06-08 AIP1044 FSD → RAP Jun 8, 21:50 UTCJun 8, 22:45 UTC55m

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 N261GL page for operator, model, and routing details .

Mode-S A28355 frequently asked

What is Mode-S code A28355?
A28355 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N261GL.
Where is Mode-S A28355 registered?
Mode-S code A28355 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 A28355 broadcasting right now?
No active broadcast right now. Last signal was 5h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A28355, octal 50501525, decimal 10,650,453.
What flights does A28355 operate?
Mode-S A28355 has broadcast 18 distinct callsigns, including AIP1563, AIP1541, AIP1407, AIP1522, AIP1542.