Apparatus

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sensors Mode-S transponder

A147B5

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N1817E · CESSNA 172 Skyhawk · operated by ATP AIRCRAFT 6 LLC

Hex
A147B5
Octal
50243665
Decimal
10,569,653
Country
US
Tail
N1817E
Type
C172
No current signal · last broadcast 7d ago
Flights observed
146
Distinct callsigns
1
Country
US
Last broadcast
7d ago

Last known position

Most recent position reported by Mode-S A147B5.

Country allocation

The ICAO 24-bit address A147B5 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
CXK321 - 146 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 CXK321 - Jul 26, 16:40 UTCJul 26, 18:30 UTC1h 50m
2026-07-26 CXK321 - Jul 26, 12:05 UTCJul 26, 13:40 UTC1h 35m
2026-07-25 CXK321 - Jul 25, 15:25 UTCJul 25, 16:00 UTC35m
2026-07-23 CXK321 - Jul 23, 18:05 UTCJul 23, 19:15 UTC1h 10m
2026-07-22 CXK321 - Jul 22, 17:25 UTCJul 22, 19:10 UTC1h 45m
2026-07-22 CXK321 - Jul 22, 15:10 UTCJul 22, 16:25 UTC1h 15m
2026-07-20 CXK321 - Jul 20, 19:55 UTCJul 20, 20:15 UTC20m
2026-07-20 CXK321 - Jul 20, 18:55 UTCJul 20, 19:15 UTC20m
2026-07-15 CXK321 - Jul 15, 04:15 UTCJul 15, 06:15 UTC2h 0m
2026-07-13 CXK321 TUS → TUS Jul 13, 15:00 UTCJul 13, 16:35 UTC1h 35m
2026-07-12 CXK321 - Jul 12, 18:55 UTCJul 12, 19:25 UTC30m
2026-07-12 CXK321 - Jul 12, 17:35 UTCJul 12, 18:10 UTC35m
2026-07-12 CXK321 TUS → TUS Jul 12, 15:10 UTCJul 12, 16:40 UTC1h 30m
2026-07-11 CXK321 - Jul 11, 19:05 UTCJul 11, 19:25 UTC20m
2026-07-11 CXK321 - Jul 11, 17:35 UTCJul 11, 18:00 UTC25m
2026-07-11 CXK321 - Jul 11, 15:05 UTCJul 11, 16:35 UTC1h 30m
2026-07-11 CXK321 TUS → TUS Jul 11, 12:10 UTCJul 11, 13:50 UTC1h 40m
2026-07-09 CXK321 - Jul 9, 17:15 UTCJul 9, 18:30 UTC1h 15m
2026-07-08 CXK321 - Jul 8, 17:55 UTCJul 8, 18:15 UTC20m
2026-07-08 CXK321 - Jul 8, 16:25 UTCJul 8, 16:45 UTC20m
2026-07-08 CXK321 TUS → TUS Jul 8, 14:50 UTCJul 8, 15:20 UTC30m
2026-07-08 CXK321 TUS → TUS Jul 8, 12:05 UTCJul 8, 13:30 UTC1h 25m
2026-07-06 CXK321 - Jul 6, 03:40 UTCJul 6, 05:15 UTC1h 35m
2026-07-06 CXK321 - Jul 6, 00:25 UTCJul 6, 01:50 UTC1h 25m
2026-07-04 CXK321 - Jul 4, 15:50 UTCJul 4, 17:05 UTC1h 15m
2026-07-04 CXK321 - Jul 4, 12:15 UTCJul 4, 14:45 UTC2h 30m
2026-07-03 CXK321 - Jul 3, 16:40 UTCJul 3, 17:15 UTC35m
2026-07-03 CXK321 - Jul 3, 15:25 UTCJul 3, 15:45 UTC20m
2026-07-01 CXK321 - Jul 1, 17:40 UTCJul 1, 18:00 UTC20m
2026-07-01 CXK321 - Jul 1, 16:40 UTCJul 1, 17:00 UTC20m
2026-07-01 CXK321 - Jul 1, 03:45 UTCJul 1, 04:25 UTC40m
2026-06-30 CXK321 - Jun 30, 17:45 UTCJun 30, 18:05 UTC20m
2026-06-30 CXK321 - Jun 30, 16:10 UTCJun 30, 16:30 UTC20m
2026-06-30 CXK321 TUS → TUS Jun 30, 13:20 UTCJun 30, 15:10 UTC1h 50m
2026-06-27 CXK321 - Jun 27, 17:04 UTCJun 27, 17:39 UTC35m
2026-06-27 CXK321 - Jun 27, 16:00 UTCJun 27, 16:14 UTC15m
2026-06-27 CXK321 - Jun 27, 13:04 UTCJun 27, 14:20 UTC1h 15m
2026-06-26 CXK321 - Jun 26, 15:05 UTCJun 26, 15:15 UTC10m
2026-06-26 CXK321 - Jun 26, 13:19 UTCJun 26, 13:30 UTC10m
2026-06-25 CXK321 - Jun 25, 16:50 UTCJun 25, 17:30 UTC40m
2026-06-25 CXK321 - Jun 25, 15:34 UTCJun 25, 16:09 UTC35m
2026-06-25 CXK321 - Jun 25, 13:09 UTCJun 25, 13:20 UTC10m
2026-06-24 CXK321 - Jun 24, 15:59 UTCJun 24, 16:19 UTC20m
2026-06-24 CXK321 - Jun 24, 14:55 UTCJun 24, 15:05 UTC10m
2026-06-24 CXK321 - Jun 24, 12:14 UTCJun 24, 13:30 UTC1h 15m
2026-06-23 CXK321 - Jun 23, 19:00 UTCJun 23, 19:15 UTC15m
2026-06-23 CXK321 - Jun 23, 15:09 UTCJun 23, 15:44 UTC35m
2026-06-23 CXK321 - Jun 23, 13:29 UTCJun 23, 14:35 UTC1h 5m
2026-06-22 CXK321 TUS → TUS Jun 22, 15:20 UTCJun 22, 16:50 UTC1h 30m
2026-06-22 CXK321 TUS → TUS Jun 22, 12:05 UTCJun 22, 13:29 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 N1817E page for operator, model, and routing details .

Mode-S A147B5 frequently asked

What is Mode-S code A147B5?
A147B5 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N1817E.
Where is Mode-S A147B5 registered?
Mode-S code A147B5 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 A147B5 broadcasting right now?
No active broadcast right now. Last signal was 7d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A147B5, octal 50243665, decimal 10,569,653.
What flights does A147B5 operate?
Mode-S A147B5 has broadcast 1 distinct callsign, including CXK321.