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sensors Mode-S transponder

A3F0AF

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N353HP · AEROSPATIALE AS-350 Ecureuil · operated by STATE OF UTAH

Hex
A3F0AF
Octal
50770257
Decimal
10,743,983
Country
US
Tail
N353HP
Type
AS50
No current signal · last broadcast Jun 22, 03:45 UTC
Flights observed
158
Distinct callsigns
1
Country
US
Last broadcast
Jun 22, 03:45 UTC

Last known position

Most recent position reported by Mode-S A3F0AF.

Country allocation

The ICAO 24-bit address A3F0AF 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
N353HP - 158 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-22 N353HP - Jun 22, 03:30 UTCJun 22, 03:45 UTC15m
2026-06-22 N353HP - Jun 22, 02:40 UTCJun 22, 02:54 UTC15m
2026-06-22 N353HP - Jun 22, 02:00 UTCJun 22, 02:14 UTC15m
2026-06-20 N353HP - Jun 20, 21:40 UTCJun 20, 21:49 UTC10m
2026-06-20 N353HP - Jun 20, 20:55 UTCJun 20, 21:19 UTC25m
2026-06-20 N353HP - Jun 20, 06:19 UTCJun 20, 07:59 UTC1h 40m
2026-06-19 N353HP - Jun 19, 22:55 UTCJun 19, 23:34 UTC40m
2026-06-19 N353HP - Jun 19, 16:49 UTCJun 19, 17:04 UTC15m
2026-06-19 N353HP - Jun 19, 15:59 UTCJun 19, 16:14 UTC15m
2026-06-19 N353HP - Jun 19, 06:10 UTCJun 19, 06:20 UTC10m
2026-06-19 N353HP - Jun 19, 05:09 UTCJun 19, 05:19 UTC10m
2026-06-19 N353HP - Jun 19, 04:50 UTCJun 19, 05:05 UTC15m
2026-06-19 N353HP - Jun 19, 03:39 UTCJun 19, 04:10 UTC30m
2026-06-19 N353HP - Jun 19, 02:09 UTCJun 19, 02:39 UTC30m
2026-06-19 N353HP - Jun 19, 01:45 UTCJun 19, 02:04 UTC20m
2026-06-17 N353HP - Jun 17, 22:45 UTCJun 17, 23:30 UTC45m
2026-06-17 N353HP - Jun 17, 21:10 UTCJun 17, 21:40 UTC30m
2026-06-17 N353HP - Jun 17, 05:00 UTCJun 17, 05:10 UTC10m
2026-06-17 N353HP - Jun 17, 03:00 UTCJun 17, 04:21 UTC1h 20m
2026-06-16 N353HP - Jun 16, 05:15 UTCJun 16, 05:25 UTC10m
2026-06-16 N353HP SLC → SLC Jun 16, 02:34 UTCJun 16, 03:55 UTC1h 20m
2026-06-15 N353HP - Jun 15, 22:59 UTCJun 15, 23:45 UTC45m
2026-06-14 N353HP - Jun 14, 03:15 UTCJun 14, 03:35 UTC20m
2026-06-14 N353HP - Jun 14, 01:50 UTCJun 14, 02:40 UTC50m
2026-06-14 N353HP - Jun 14, 01:35 UTCJun 14, 01:45 UTC10m
2026-06-13 N353HP - Jun 13, 16:25 UTCJun 13, 16:40 UTC15m
2026-06-13 N353HP - Jun 13, 15:00 UTCJun 13, 15:50 UTC50m
2026-06-13 N353HP - Jun 13, 13:45 UTCJun 13, 14:00 UTC15m
2026-06-13 N353HP - Jun 13, 10:05 UTCJun 13, 10:40 UTC35m
2026-06-13 N353HP - Jun 13, 04:50 UTCJun 13, 06:00 UTC1h 10m
2026-06-13 N353HP - Jun 13, 00:35 UTCJun 13, 01:00 UTC25m
2026-06-12 N353HP - Jun 12, 18:15 UTCJun 12, 23:25 UTC5h 10m
2026-06-12 N353HP OGD → SLC Jun 12, 00:55 UTCJun 12, 01:35 UTC40m
2026-06-11 N353HP - Jun 11, 23:45 UTCJun 12, 00:05 UTC20m
2026-06-11 N353HP - Jun 11, 21:45 UTCJun 11, 21:55 UTC10m
2026-06-11 N353HP - Jun 11, 20:10 UTCJun 11, 21:00 UTC50m
2026-06-11 N353HP - Jun 11, 18:50 UTCJun 11, 19:05 UTC15m
2026-06-11 N353HP - Jun 11, 04:35 UTCJun 11, 05:30 UTC55m
2026-06-10 N353HP - Jun 10, 22:20 UTCJun 11, 02:25 UTC4h 5m
2026-06-10 N353HP - Jun 10, 04:20 UTCJun 10, 04:35 UTC15m
2026-06-09 N353HP - Jun 9, 22:55 UTCJun 9, 23:05 UTC10m
2026-06-09 N353HP - Jun 9, 00:45 UTCJun 9, 02:15 UTC1h 30m
2026-06-07 N353HP - Jun 7, 02:10 UTCJun 7, 02:35 UTC25m
2026-06-05 N353HP - Jun 5, 16:35 UTCJun 5, 17:00 UTC25m
2026-06-05 N353HP - Jun 5, 04:25 UTCJun 5, 05:20 UTC55m
2026-06-05 N353HP - Jun 5, 02:20 UTCJun 5, 03:15 UTC55m
2026-06-05 N353HP - Jun 5, 01:30 UTCJun 5, 01:40 UTC10m
2026-06-05 N353HP - Jun 5, 00:10 UTCJun 5, 01:25 UTC1h 15m
2026-06-04 N353HP - Jun 4, 20:30 UTCJun 4, 21:30 UTC1h 0m
2026-06-04 N353HP - Jun 4, 02:55 UTCJun 4, 03:25 UTC30m

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 N353HP page for operator, model, and routing details .

Mode-S A3F0AF frequently asked

What is Mode-S code A3F0AF?
A3F0AF is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N353HP.
Where is Mode-S A3F0AF registered?
Mode-S code A3F0AF 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 A3F0AF broadcasting right now?
No active broadcast right now. Last signal was Jun 22, 03:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3F0AF, octal 50770257, decimal 10,743,983.
What flights does A3F0AF operate?
Mode-S A3F0AF has broadcast 1 distinct callsign, including N353HP.