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sensors Mode-S transponder

A146A2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N181Z · BEECH 200 Super King Air · operated by USDA FOREST SERVICE, C/O FIRE AND AVIATION

Hex
A146A2
Octal
50243242
Decimal
10,569,378
Country
US
Tail
N181Z
Type
BE20
Broadcasting now · callsign XCN81 · 21,000 ft
Flights observed
117
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 05:40 UTC

Current position

A146A2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A146A2 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
XCN81 - 117 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 XCN81 - Jul 26, 03:40 UTCJul 26, 05:40 UTC2h 0m
2026-07-23 XCN81 - Jul 23, 06:35 UTCJul 23, 07:10 UTC35m
2026-07-23 XCN81 - Jul 23, 04:05 UTCJul 23, 06:00 UTC1h 55m
2026-07-23 XCN81 EUG → RDM Jul 23, 01:50 UTCJul 23, 03:20 UTC1h 30m
2026-07-22 XCN81 - Jul 22, 04:35 UTCJul 22, 05:25 UTC50m
2026-07-22 XCN81 - Jul 22, 02:10 UTCJul 22, 03:15 UTC1h 5m
2026-07-21 XCN81 - Jul 21, 07:20 UTCJul 21, 09:10 UTC1h 50m
2026-07-21 XCN81 EUG → RDM Jul 21, 03:30 UTCJul 21, 06:25 UTC2h 55m
2026-07-20 XCN81 - Jul 20, 04:40 UTCJul 20, 08:25 UTC3h 45m
2026-07-20 XCN81 - Jul 20, 02:50 UTCJul 20, 04:00 UTC1h 10m
2026-07-20 XCN81 - Jul 20, 00:55 UTCJul 20, 02:10 UTC1h 15m
2026-07-19 XCN81 - Jul 19, 07:20 UTCJul 19, 09:30 UTC2h 10m
2026-07-19 XCN81 - Jul 19, 03:50 UTCJul 19, 05:55 UTC2h 5m
2026-07-19 XCN81 - Jul 19, 02:45 UTCJul 19, 03:15 UTC30m
2026-07-18 XCN81 - Jul 18, 05:00 UTCJul 18, 08:05 UTC3h 5m
2026-07-17 XCN81 - Jul 17, 06:50 UTCJul 17, 09:04 UTC2h 15m
2026-07-17 XCN81 - Jul 17, 03:39 UTCJul 17, 05:35 UTC1h 55m
2026-07-16 XCN81 - Jul 16, 07:35 UTCJul 16, 09:50 UTC2h 15m
2026-07-16 XCN81 - Jul 16, 05:20 UTCJul 16, 05:55 UTC35m
2026-07-15 XCN81 - Jul 15, 05:45 UTCJul 15, 07:45 UTC2h 0m
2026-07-15 XCN81 - Jul 15, 02:35 UTCJul 15, 04:40 UTC2h 5m
2026-07-14 XCN81 - Jul 14, 05:55 UTCJul 14, 08:25 UTC2h 30m
2026-07-14 XCN81 MFR → EUG Jul 14, 03:40 UTCJul 14, 05:25 UTC1h 45m
2026-07-13 XCN81 - Jul 13, 05:40 UTCJul 13, 06:20 UTC40m
2026-07-13 XCN81 - Jul 13, 04:15 UTCJul 13, 05:01 UTC45m
2026-07-12 XCN81 - Jul 12, 06:45 UTCJul 12, 08:01 UTC1h 15m
2026-07-12 XCN81 - Jul 12, 05:30 UTCJul 12, 05:50 UTC20m
2026-07-12 XCN81 - Jul 12, 03:05 UTCJul 12, 04:25 UTC1h 20m
2026-07-11 XCN81 - Jul 11, 06:35 UTCJul 11, 08:01 UTC1h 25m
2026-07-11 XCN81 - Jul 11, 04:30 UTCJul 11, 05:45 UTC1h 15m
2026-07-11 XCN81 - Jul 11, 03:01 UTCJul 11, 03:15 UTC15m
2026-07-10 XCN81 - Jul 10, 06:40 UTCJul 10, 06:55 UTC15m
2026-07-10 XCN81 - Jul 10, 03:05 UTCJul 10, 05:40 UTC2h 35m
2026-07-09 XCN81 - Jul 9, 04:45 UTCJul 9, 05:20 UTC35m
2026-07-08 XCN81 - Jul 8, 06:55 UTCJul 8, 07:55 UTC1h 0m
2026-07-08 XCN81 - Jul 8, 05:25 UTCJul 8, 05:55 UTC30m
2026-07-08 XCN81 - Jul 8, 03:10 UTCJul 8, 03:50 UTC40m
2026-07-07 XCN81 - Jul 7, 21:05 UTCJul 7, 22:25 UTC1h 20m
2026-07-07 XCN81 - Jul 7, 07:15 UTCJul 7, 07:45 UTC30m
2026-07-07 XCN81 - Jul 7, 02:55 UTCJul 7, 05:30 UTC2h 35m
2026-07-06 XCN81 - Jul 6, 06:50 UTCJul 6, 07:05 UTC15m
2026-07-06 XCN81 - Jul 6, 05:35 UTCJul 6, 06:00 UTC25m
2026-07-06 XCN81 - Jul 6, 02:30 UTCJul 6, 04:40 UTC2h 10m
2026-07-05 XCN81 - Jul 5, 05:00 UTCJul 5, 06:55 UTC1h 55m
2026-07-05 XCN81 - Jul 5, 03:15 UTCJul 5, 04:15 UTC1h 0m
2026-07-05 XCN81 - Jul 5, 01:55 UTCJul 5, 02:25 UTC30m
2026-07-04 XCN81 - Jul 4, 05:15 UTCJul 4, 06:55 UTC1h 40m
2026-07-04 XCN81 - Jul 4, 04:15 UTCJul 4, 04:35 UTC20m
2026-07-04 XCN81 - Jul 4, 01:50 UTCJul 4, 03:35 UTC1h 45m
2026-07-03 XCN81 - Jul 3, 05:25 UTCJul 3, 07:00 UTC1h 35m

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 N181Z page for operator, model, and routing details .

Mode-S A146A2 frequently asked

What is Mode-S code A146A2?
A146A2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N181Z.
Where is Mode-S A146A2 registered?
Mode-S code A146A2 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 A146A2 broadcasting right now?
Yes. Mode-S A146A2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A146A2, octal 50243242, decimal 10,569,378.
What flights does A146A2 operate?
Mode-S A146A2 has broadcast 1 distinct callsign, including XCN81.