Apparatus

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sensors Mode-S transponder

A19B49

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N202UX · BEECH 1900 · operated by ALPINE AVIATION INC

Hex
A19B49
Octal
50315511
Decimal
10,591,049
Country
US
Tail
N202UX
Type
B190
No current signal · last broadcast 11h ago
Flights observed
103
Distinct callsigns
11
Country
US
Last broadcast
11h ago

Last known position

Most recent position reported by Mode-S A19B49.

Country allocation

The ICAO 24-bit address A19B49 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
AIP1407 - 16 2026-07-13
AIP1566 - 14 2026-07-11
AIP1565 - 14 2026-07-11
AIP1604 Alpine Air Express 12 2026-06-05
AIP1603 Alpine Air Express 12 2026-06-05
AIP1541 Alpine Air Express 10 2026-06-06
AIP1542 Alpine Air Express 7 2026-05-23
AIP1587 Alpine Air Express 6 2026-06-03
AIP1408 - 6 2026-06-26
AIP1588 Alpine Air Express 3 2026-06-02
AIP1044 Alpine Air Express 3 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 AIP1407 - Jul 13, 23:25 UTCJul 14, 00:00 UTC35m
2026-07-13 AIP1407 - Jul 13, 21:30 UTCJul 13, 22:00 UTC30m
2026-07-11 AIP1566 - Jul 11, 15:50 UTCJul 11, 16:25 UTC35m
2026-07-11 AIP1565 - Jul 11, 13:05 UTCJul 11, 13:20 UTC15m
2026-07-10 AIP1566 - Jul 10, 23:45 UTCJul 11, 00:25 UTC40m
2026-07-10 AIP1565 - Jul 10, 12:15 UTCJul 10, 13:00 UTC45m
2026-07-10 AIP1566 - Jul 10, 00:20 UTCJul 10, 00:40 UTC20m
2026-07-09 AIP1565 - Jul 9, 12:00 UTCJul 9, 12:45 UTC45m
2026-07-08 AIP1566 - Jul 8, 23:50 UTCJul 9, 00:25 UTC35m
2026-07-08 AIP1565 - Jul 8, 12:05 UTCJul 8, 12:50 UTC45m
2026-07-06 AIP1566 - Jul 6, 23:50 UTCJul 7, 00:25 UTC35m
2026-07-06 AIP1565 - Jul 6, 21:25 UTCJul 6, 22:10 UTC45m
2026-07-03 AIP1566 - Jul 3, 23:55 UTCJul 4, 00:30 UTC35m
2026-07-03 AIP1565 - Jul 3, 11:50 UTCJul 3, 12:30 UTC40m
2026-07-02 AIP1566 - Jul 2, 23:50 UTCJul 3, 00:30 UTC40m
2026-07-02 AIP1565 - Jul 2, 11:45 UTCJul 2, 12:20 UTC35m
2026-07-01 AIP1566 - Jul 1, 23:50 UTCJul 2, 00:25 UTC35m
2026-07-01 AIP1565 - Jul 1, 12:30 UTCJul 1, 13:10 UTC40m
2026-06-30 AIP1566 - Jun 30, 23:55 UTCJul 1, 00:30 UTC35m
2026-06-30 AIP1565 - Jun 30, 12:45 UTCJun 30, 13:30 UTC45m
2026-06-29 AIP1407 MOT → FAR Jun 29, 23:29 UTCJun 30, 00:09 UTC40m
2026-06-29 AIP1407 MOT → FAR Jun 29, 21:24 UTCJun 29, 21:44 UTC20m
2026-06-26 AIP1407 MOT → FAR Jun 26, 23:25 UTCJun 27, 00:00 UTC35m
2026-06-26 AIP1408 - Jun 26, 15:15 UTCJun 26, 15:45 UTC30m
2026-06-25 AIP1407 MOT → FAR Jun 25, 23:34 UTCJun 26, 00:05 UTC30m
2026-06-25 AIP1408 - Jun 25, 15:59 UTCJun 25, 16:35 UTC35m
2026-06-24 AIP1407 MOT → FAR Jun 24, 23:29 UTCJun 25, 00:05 UTC35m
2026-06-24 AIP1408 - Jun 24, 12:44 UTCJun 24, 13:20 UTC35m
2026-06-23 AIP1407 MOT → FAR Jun 23, 23:29 UTCJun 24, 00:05 UTC35m
2026-06-23 AIP1408 - Jun 23, 11:59 UTCJun 23, 12:49 UTC50m
2026-06-22 AIP1407 MOT → FAR Jun 22, 23:24 UTCJun 23, 00:00 UTC35m
2026-06-22 AIP1407 MOT → FAR Jun 22, 21:35 UTCJun 22, 21:59 UTC25m
2026-06-06 AIP1541 BIS → FAR Jun 6, 22:39 UTCJun 6, 23:30 UTC50m
2026-06-05 AIP1604 RAP → FSD Jun 5, 14:15 UTCJun 5, 15:00 UTC45m
2026-06-05 AIP1603 FSD → RAP Jun 5, 11:25 UTCJun 5, 12:30 UTC1h 5m
2026-06-03 AIP1587 RAP → FSD Jun 3, 00:45 UTCJun 3, 01:40 UTC55m
2026-06-02 AIP1588 FSD → RAP Jun 2, 11:20 UTCJun 2, 12:15 UTC55m
2026-06-02 AIP1587 RAP → FSD Jun 2, 00:55 UTCJun 2, 01:40 UTC45m
2026-06-01 AIP1044 FSD → RAP Jun 1, 22:10 UTCJun 1, 23:05 UTC55m
2026-05-29 AIP1604 - May 29, 16:15 UTCMay 29, 17:10 UTC55m
2026-05-29 AIP1603 FSD → RAP May 29, 11:25 UTCMay 29, 12:20 UTC55m
2026-05-28 AIP1604 - May 28, 14:55 UTCMay 28, 15:50 UTC55m
2026-05-28 AIP1603 FSD → RAP May 28, 12:45 UTCMay 28, 13:40 UTC55m
2026-05-23 AIP1541 BIS → FAR May 23, 20:45 UTCMay 23, 21:40 UTC55m
2026-05-23 AIP1541 BIS → FAR May 23, 17:55 UTCMay 23, 18:20 UTC26m
2026-05-23 AIP1542 FAR → DIK May 23, 12:25 UTCMay 23, 12:55 UTC30m
2026-05-22 AIP1566 XWA → FAR May 22, 23:45 UTCMay 23, 00:20 UTC35m
2026-05-22 AIP1565 FAR → XWA May 22, 11:50 UTCMay 22, 12:25 UTC35m
2026-05-21 AIP1566 XWA → FAR May 21, 23:40 UTCMay 22, 00:15 UTC35m
2026-05-21 AIP1565 FAR → XWA May 21, 11:55 UTCMay 21, 12:30 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 N202UX page for operator, model, and routing details .

Mode-S A19B49 frequently asked

What is Mode-S code A19B49?
A19B49 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N202UX.
Where is Mode-S A19B49 registered?
Mode-S code A19B49 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 A19B49 broadcasting right now?
No active broadcast right now. Last signal was 11h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A19B49, octal 50315511, decimal 10,591,049.
What flights does A19B49 operate?
Mode-S A19B49 has broadcast 11 distinct callsigns, including AIP1407, AIP1566, AIP1565, AIP1604, AIP1603.