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 9h ago
Flights observed
64
Distinct callsigns
11
Country
US
Last broadcast
9h 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
AIP1604 - 11 2026-05-29
AIP1603 Alpine Air Express 11 2026-05-29
AIP1541 Alpine Air Express 9 2026-05-23
AIP1542 Alpine Air Express 7 2026-05-23
AIP1407 Alpine Air Express 6 2026-04-16
AIP1566 Alpine Air Express 5 2026-05-22
AIP1565 Alpine Air Express 5 2026-05-22
AIP1587 Alpine Air Express 4 2026-05-05
AIP1588 Alpine Air Express 2 2026-04-29
AIP1408 Alpine Air Express 2 2026-04-16
AIP1044 Alpine Air Express 2 2026-05-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-05-20 AIP1566 XWA → FAR May 20, 23:45 UTCMay 21, 00:20 UTC35m
2026-05-20 AIP1565 FAR → XWA May 20, 12:15 UTCMay 20, 12:50 UTC35m
2026-05-19 AIP1566 XWA → FAR May 19, 23:45 UTCMay 20, 00:20 UTC35m
2026-05-19 AIP1565 FAR → XWA May 19, 13:00 UTCMay 19, 13:35 UTC35m
2026-05-18 AIP1566 XWA → FAR May 18, 23:45 UTCMay 19, 00:25 UTC40m
2026-05-18 AIP1565 FAR → XWA May 18, 21:25 UTCMay 18, 22:00 UTC35m
2026-05-16 AIP1541 BIS → FAR May 16, 00:20 UTCMay 16, 00:40 UTC20m
2026-05-15 AIP1542 FAR → DIK May 15, 11:30 UTCMay 15, 12:05 UTC35m
2026-05-15 AIP1541 BIS → FAR May 15, 00:30 UTCMay 15, 00:45 UTC15m
2026-05-14 AIP1542 FAR → DIK May 14, 12:15 UTCMay 14, 12:50 UTC35m
2026-05-14 AIP1541 BIS → FAR May 14, 00:40 UTCMay 14, 00:55 UTC15m
2026-05-13 AIP1542 FAR → DIK May 13, 11:45 UTCMay 13, 12:20 UTC35m
2026-05-13 AIP1541 BIS → FAR May 13, 00:35 UTCMay 13, 00:55 UTC20m
2026-05-12 AIP1542 FAR → DIK May 12, 12:20 UTCMay 12, 12:55 UTC35m
2026-05-11 AIP1542 FAR → DIK May 11, 22:00 UTCMay 11, 22:15 UTC15m
2026-05-09 AIP1541 BIS → FAR May 9, 23:40 UTCMay 10, 00:39 UTC1h 0m
2026-05-08 AIP1604 RAP → FSD May 8, 14:35 UTCMay 8, 15:25 UTC50m
2026-05-08 AIP1603 FSD → RAP May 8, 11:40 UTCMay 8, 12:39 UTC1h 0m
2026-05-07 AIP1604 RAP → FSD May 7, 14:10 UTCMay 7, 15:00 UTC50m
2026-05-07 AIP1603 FSD → RAP May 7, 11:40 UTCMay 7, 12:45 UTC1h 5m
2026-05-06 AIP1604 RAP → FSD May 6, 14:30 UTCMay 6, 15:25 UTC55m
2026-05-06 AIP1603 FSD → RAP May 6, 11:35 UTCMay 6, 12:40 UTC1h 5m
2026-05-05 AIP1604 RAP → FSD May 5, 14:25 UTCMay 5, 15:15 UTC50m
2026-05-05 AIP1603 FSD → RAP May 5, 11:35 UTCMay 5, 12:50 UTC1h 15m
2026-05-05 AIP1587 RAP → FSD May 5, 01:05 UTCMay 5, 01:55 UTC50m
2026-05-04 AIP1044 FSD → RAP May 4, 21:30 UTCMay 4, 22:40 UTC1h 10m
2026-04-30 AIP1604 RAP → FSD Apr 30, 14:20 UTCApr 30, 15:10 UTC50m
2026-04-30 AIP1603 FSD → RAP Apr 30, 11:35 UTCApr 30, 12:40 UTC1h 5m
2026-04-30 AIP1587 RAP → FSD Apr 30, 00:50 UTCApr 30, 01:35 UTC45m
2026-04-29 AIP1588 FSD → RAP Apr 29, 11:55 UTCApr 29, 12:50 UTC55m
2026-04-29 AIP1587 RAP → FSD Apr 29, 00:50 UTCApr 29, 01:40 UTC50m
2026-04-28 AIP1588 FSD → RAP Apr 28, 13:10 UTCApr 28, 14:10 UTC1h 0m
2026-04-24 AIP1604 RAP → FSD Apr 24, 14:15 UTCApr 24, 15:00 UTC45m
2026-04-24 AIP1603 FSD → RAP Apr 24, 11:45 UTCApr 24, 12:50 UTC1h 5m
2026-04-23 AIP1604 RAP → FSD Apr 23, 14:30 UTCApr 23, 15:30 UTC1h 0m
2026-04-23 AIP1603 FSD → RAP Apr 23, 11:50 UTCApr 23, 12:45 UTC55m
2026-04-22 AIP1604 RAP → FSD Apr 22, 15:25 UTCApr 22, 16:20 UTC55m
2026-04-22 AIP1603 FSD → RAP Apr 22, 11:40 UTCApr 22, 12:40 UTC1h 0m
2026-04-21 AIP1604 - Apr 21, 14:10 UTCApr 21, 15:05 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 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 9h 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 AIP1604, AIP1603, AIP1541, AIP1542, AIP1407.