Apparatus

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sensors Mode-S transponder

AD1A1D

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N943UP · operated by CXLH2 LLC

Hex
AD1A1D
Octal
53215035
Decimal
11,344,413
Country
US
Tail
N943UP
Type
CL30
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
139
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S AD1A1D.

Country allocation

The ICAO 24-bit address AD1A1D 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 1 distinct

Callsign Airline Flights Last seen
WUP943 - 139 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 WUP943 - Jul 26, 20:50 UTCJul 26, 21:15 UTC25m
2026-07-26 WUP943 - Jul 26, 15:35 UTCJul 26, 19:00 UTC3h 25m
2026-07-25 WUP943 - Jul 25, 17:20 UTCJul 26, 17:15 UTC23h 56m
2026-07-25 WUP943 - Jul 25, 15:05 UTCJul 25, 19:00 UTC3h 55m
2026-07-24 WUP943 - Jul 24, 22:25 UTCJul 24, 23:35 UTC1h 10m
2026-07-17 WUP943 - Jul 17, 17:35 UTCJul 17, 18:55 UTC1h 20m
2026-07-17 WUP943 - Jul 17, 13:00 UTCJul 17, 15:40 UTC2h 40m
2026-07-16 WUP943 - Jul 16, 21:00 UTCJul 16, 23:25 UTC2h 25m
2026-07-16 WUP943 - Jul 16, 17:20 UTCJul 16, 19:40 UTC2h 20m
2026-07-16 WUP943 - Jul 16, 15:49 UTCJul 16, 16:15 UTC25m
2026-07-15 WUP943 SJC → TEB Jul 15, 01:40 UTCJul 15, 06:40 UTC5h 0m
2026-07-14 WUP943 - Jul 14, 21:05 UTCJul 14, 22:55 UTC1h 49m
2026-07-14 WUP943 - Jul 14, 15:50 UTCJul 14, 19:15 UTC3h 25m
2026-07-14 WUP943 - Jul 14, 14:15 UTCJul 14, 15:10 UTC55m
2026-07-13 WUP943 - Jul 13, 18:10 UTCJul 13, 20:30 UTC2h 20m
2026-07-12 WUP943 - Jul 12, 23:00 UTCJul 13, 00:35 UTC1h 35m
2026-07-12 WUP943 - Jul 12, 14:45 UTCJul 12, 21:40 UTC6h 55m
2026-07-11 WUP943 - Jul 11, 16:25 UTCJul 11, 17:20 UTC55m
2026-07-11 WUP943 - Jul 11, 14:50 UTCJul 11, 16:20 UTC1h 30m
2026-07-10 WUP943 - Jul 10, 20:35 UTCJul 10, 22:05 UTC1h 30m
2026-07-10 WUP943 OPF → PNS Jul 10, 18:35 UTCJul 10, 19:50 UTC1h 15m
2026-07-10 WUP943 - Jul 10, 15:10 UTCJul 10, 17:15 UTC2h 5m
2026-07-10 WUP943 - Jul 10, 14:50 UTCJul 10, 15:05 UTC15m
2026-07-09 WUP943 - Jul 9, 15:25 UTCJul 9, 17:30 UTC2h 5m
2026-07-08 WUP943 - Jul 8, 22:05 UTCJul 8, 23:45 UTC1h 40m
2026-07-08 WUP943 - Jul 8, 19:15 UTCJul 8, 20:35 UTC1h 20m
2026-07-08 WUP943 - Jul 8, 16:10 UTCJul 8, 17:15 UTC1h 5m
2026-07-07 WUP943 CLD → BNA Jul 7, 18:05 UTCJul 7, 21:45 UTC3h 40m
2026-07-06 WUP943 - Jul 6, 21:40 UTCJul 6, 23:25 UTC1h 45m
2026-07-06 WUP943 - Jul 6, 15:55 UTCJul 6, 20:25 UTC4h 30m
2026-07-05 WUP943 - Jul 5, 18:40 UTCJul 5, 19:20 UTC40m
2026-07-05 WUP943 - Jul 5, 14:55 UTCJul 5, 17:30 UTC2h 35m
2026-07-04 WUP943 - Jul 4, 22:10 UTCJul 5, 00:05 UTC1h 55m
2026-07-04 WUP943 - Jul 4, 17:05 UTCJul 4, 21:20 UTC4h 15m
2026-07-04 WUP943 - Jul 4, 14:45 UTCJul 4, 15:30 UTC45m
2026-07-03 WUP943 - Jul 3, 20:30 UTCJul 3, 23:20 UTC2h 50m
2026-07-03 WUP943 - Jul 3, 15:15 UTCJul 3, 18:40 UTC3h 25m
2026-07-02 WUP943 PWK → APA Jul 2, 15:25 UTCJul 2, 20:30 UTC5h 5m
2026-07-02 WUP943 - Jul 2, 11:55 UTCJul 2, 13:55 UTC2h 0m
2026-07-01 WUP943 - Jul 1, 18:40 UTCJul 1, 22:55 UTC4h 15m
2026-07-01 WUP943 - Jul 1, 16:00 UTCJul 1, 17:05 UTC1h 5m
2026-07-01 WUP943 - Jul 1, 13:25 UTCJul 1, 15:15 UTC1h 50m
2026-06-30 WUP943 - Jun 30, 18:30 UTCJun 30, 20:40 UTC2h 10m
2026-06-30 WUP943 - Jun 30, 14:50 UTCJun 30, 16:55 UTC2h 5m
2026-06-30 WUP943 - Jun 30, 12:55 UTCJun 30, 13:15 UTC20m
2026-06-27 WUP943 - Jun 27, 18:39 UTCJun 27, 23:14 UTC4h 35m
2026-06-26 WUP943 - Jun 26, 18:20 UTCJun 26, 21:35 UTC3h 15m
2026-06-26 WUP943 - Jun 26, 13:15 UTCJun 26, 17:00 UTC3h 45m
2026-06-25 WUP943 - Jun 25, 14:09 UTCJun 25, 18:59 UTC4h 50m
2026-06-24 WUP943 - Jun 24, 22:10 UTCJun 24, 23:34 UTC1h 25m

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 N943UP page for operator, model, and routing details .

Mode-S AD1A1D frequently asked

What is Mode-S code AD1A1D?
AD1A1D is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N943UP.
Where is Mode-S AD1A1D registered?
Mode-S code AD1A1D 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 AD1A1D broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD1A1D, octal 53215035, decimal 11,344,413.
What flights does AD1A1D operate?
Mode-S AD1A1D has broadcast 1 distinct callsign, including WUP943.