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sensors Mode-S transponder

ADC171

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N986AC · PILATUS PC-12 · operated by AVERA MCKENNAN

Hex
ADC171
Octal
53340561
Decimal
11,387,249
Country
US
Tail
N986AC
Type
PC12
No current signal · last broadcast Jul 26, 17:50 UTC
Flights observed
276
Distinct callsigns
1
Country
US
Last broadcast
Jul 26, 17:50 UTC

Last known position

Most recent position reported by Mode-S ADC171.

Country allocation

The ICAO 24-bit address ADC171 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
N986AC - 276 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 N986AC - Jul 26, 17:05 UTCJul 26, 17:50 UTC45m
2026-07-26 N986AC PIR → FSD Jul 26, 15:05 UTCJul 26, 15:45 UTC40m
2026-07-26 N986AC - Jul 26, 09:15 UTCJul 26, 09:25 UTC10m
2026-07-25 N986AC FSD → PIR Jul 25, 13:00 UTCJul 25, 13:55 UTC55m
2026-07-25 N986AC - Jul 25, 11:15 UTCJul 25, 11:45 UTC30m
2026-07-25 N986AC - Jul 25, 09:30 UTCJul 25, 09:40 UTC10m
2026-07-25 N986AC FSD → PIR Jul 25, 01:30 UTCJul 25, 02:15 UTC45m
2026-07-24 N986AC - Jul 24, 23:55 UTCJul 25, 00:25 UTC30m
2026-07-24 N986AC - Jul 24, 20:55 UTCJul 24, 21:40 UTC45m
2026-07-24 N986AC - Jul 24, 19:20 UTCJul 24, 19:35 UTC15m
2026-07-24 N986AC - Jul 24, 17:40 UTCJul 24, 17:50 UTC10m
2026-07-24 N986AC - Jul 24, 06:45 UTCJul 24, 07:30 UTC45m
2026-07-24 N986AC - Jul 24, 05:10 UTCJul 24, 05:20 UTC10m
2026-07-24 N986AC - Jul 24, 03:15 UTCJul 24, 03:25 UTC10m
2026-07-24 N986AC - Jul 24, 01:30 UTCJul 24, 02:00 UTC30m
2026-07-23 N986AC - Jul 23, 23:45 UTCJul 23, 23:55 UTC10m
2026-07-23 N986AC FSD → PIR Jul 23, 22:25 UTCJul 23, 23:10 UTC45m
2026-07-23 N986AC - Jul 23, 20:30 UTCJul 23, 20:55 UTC25m
2026-07-23 N986AC - Jul 23, 19:15 UTCJul 23, 19:30 UTC15m
2026-07-23 N986AC PIR → PIR Jul 23, 18:00 UTCJul 23, 18:15 UTC15m
2026-07-23 N986AC FSD → PIR Jul 23, 08:00 UTCJul 23, 08:45 UTC45m
2026-07-23 N986AC - Jul 23, 06:10 UTCJul 23, 06:50 UTC40m
2026-07-23 N986AC FSD → PIR Jul 23, 03:15 UTCJul 23, 04:00 UTC45m
2026-07-23 N986AC - Jul 23, 01:10 UTCJul 23, 01:55 UTC45m
2026-07-23 N986AC - Jul 23, 00:05 UTCJul 23, 00:15 UTC10m
2026-07-22 N986AC - Jul 22, 05:20 UTCJul 22, 05:25 UTC5m
2026-07-22 N986AC - Jul 22, 03:20 UTCJul 22, 04:00 UTC40m
2026-07-21 N986AC - Jul 21, 20:10 UTCJul 21, 21:30 UTC1h 20m
2026-07-21 N986AC - Jul 21, 17:25 UTCJul 21, 18:20 UTC55m
2026-07-20 N986AC - Jul 20, 20:20 UTCJul 20, 21:10 UTC50m
2026-07-20 N986AC - Jul 20, 18:15 UTCJul 20, 18:55 UTC40m
2026-07-19 N986AC FSD → PIR Jul 19, 22:40 UTCJul 19, 23:30 UTC50m
2026-07-19 N986AC - Jul 19, 20:45 UTCJul 19, 21:20 UTC35m
2026-07-19 N986AC - Jul 19, 19:30 UTCJul 19, 19:55 UTC25m
2026-07-19 N986AC - Jul 19, 17:40 UTCJul 19, 18:15 UTC35m
2026-07-19 N986AC - Jul 19, 15:55 UTCJul 19, 16:15 UTC20m
2026-07-19 N986AC - Jul 19, 10:20 UTCJul 19, 11:35 UTC1h 15m
2026-07-19 N986AC - Jul 19, 08:50 UTCJul 19, 09:05 UTC15m
2026-07-19 N986AC - Jul 19, 05:55 UTCJul 19, 07:45 UTC1h 50m
2026-07-19 N986AC - Jul 19, 04:15 UTCJul 19, 04:50 UTC35m
2026-07-19 N986AC - Jul 19, 02:55 UTCJul 19, 03:05 UTC10m
2026-07-18 N986AC - Jul 18, 12:20 UTCJul 18, 13:10 UTC50m
2026-07-18 N986AC - Jul 18, 08:45 UTCJul 18, 09:10 UTC25m
2026-07-18 N986AC - Jul 18, 07:20 UTCJul 18, 07:40 UTC20m
2026-07-18 N986AC FSD → PIR Jul 18, 00:50 UTCJul 18, 01:39 UTC50m
2026-07-17 N986AC - Jul 17, 23:14 UTCJul 17, 23:35 UTC20m
2026-07-17 N986AC - Jul 17, 22:05 UTCJul 17, 22:15 UTC10m
2026-07-17 N986AC FSD → PIR Jul 17, 08:00 UTCJul 17, 08:45 UTC45m
2026-07-17 N986AC - Jul 17, 06:15 UTCJul 17, 07:00 UTC45m
2026-07-17 N986AC - Jul 17, 04:54 UTCJul 17, 05:10 UTC15m

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 N986AC page for operator, model, and routing details .

Mode-S ADC171 frequently asked

What is Mode-S code ADC171?
ADC171 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N986AC.
Where is Mode-S ADC171 registered?
Mode-S code ADC171 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 ADC171 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex ADC171, octal 53340561, decimal 11,387,249.
What flights does ADC171 operate?
Mode-S ADC171 has broadcast 1 distinct callsign, including N986AC.