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sensors Mode-S transponder

A05C66

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N122PA · CESSNA 525B Citation CJ3 · operated by PAFFORD MEDICAL BILLING SERVICES INC

Hex
A05C66
Octal
50056146
Decimal
10,509,414
Country
US
Tail
N122PA
Type
C25B
No current signal · last broadcast Jul 23, 20:55 UTC
Flights observed
89
Distinct callsigns
1
Country
US
Last broadcast
Jul 23, 20:55 UTC

Last known position

Most recent position reported by Mode-S A05C66.

Country allocation

The ICAO 24-bit address A05C66 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
N122PA - 89 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-23 N122PA - Jul 23, 20:35 UTCJul 23, 20:55 UTC20m
2026-07-23 N122PA - Jul 23, 19:10 UTCJul 23, 19:50 UTC40m
2026-07-22 N122PA - Jul 22, 21:15 UTCJul 22, 21:45 UTC30m
2026-07-22 N122PA - Jul 22, 20:20 UTCJul 22, 20:30 UTC10m
2026-07-22 N122PA - Jul 22, 12:25 UTCJul 22, 12:45 UTC20m
2026-07-22 N122PA - Jul 22, 11:40 UTCJul 22, 11:50 UTC10m
2026-07-15 N122PA - Jul 15, 19:10 UTCJul 15, 22:20 UTC3h 10m
2026-07-13 N122PA - Jul 13, 20:20 UTCJul 13, 23:20 UTC3h 0m
2026-07-13 N122PA - Jul 13, 19:25 UTCJul 13, 19:40 UTC15m
2026-07-13 N122PA - Jul 13, 18:30 UTCJul 13, 18:45 UTC15m
2026-07-06 N122PA - Jul 6, 20:25 UTCJul 6, 22:25 UTC2h 0m
2026-07-06 N122PA - Jul 6, 15:20 UTCJul 6, 17:50 UTC2h 30m
2026-07-06 N122PA - Jul 6, 13:40 UTCJul 6, 13:55 UTC15m
2026-07-02 N122PA - Jul 2, 02:15 UTCJul 2, 04:40 UTC2h 25m
2026-07-01 N122PA - Jul 1, 23:15 UTCJul 2, 01:35 UTC2h 20m
2026-07-01 N122PA - Jul 1, 21:55 UTCJul 1, 22:35 UTC40m
2026-07-01 N122PA - Jul 1, 00:05 UTCJul 1, 01:30 UTC1h 25m
2026-06-30 N122PA - Jun 30, 22:20 UTCJun 30, 23:10 UTC50m
2026-06-30 N122PA - Jun 30, 11:40 UTCJun 30, 12:30 UTC50m
2026-06-29 N122PA SLC → AUS Jun 29, 21:24 UTCJun 30, 00:04 UTC2h 40m
2026-06-29 N122PA - Jun 29, 17:40 UTCJun 29, 20:24 UTC2h 45m
2026-06-24 N122PA - Jun 24, 23:00 UTCJun 24, 23:29 UTC30m
2026-06-24 N122PA - Jun 24, 21:09 UTCJun 24, 22:29 UTC1h 20m
2026-06-24 N122PA - Jun 24, 16:54 UTCJun 24, 18:55 UTC2h 0m
2026-06-24 N122PA - Jun 24, 12:44 UTCJun 24, 15:05 UTC2h 20m
2026-06-21 N122PA - Jun 21, 21:44 UTCJun 21, 22:34 UTC50m
2026-06-21 N122PA - Jun 21, 19:29 UTCJun 21, 20:14 UTC45m
2026-06-20 N122PA - Jun 20, 22:05 UTCJun 21, 00:19 UTC2h 15m
2026-06-20 N122PA - Jun 20, 17:24 UTCJun 20, 20:20 UTC2h 55m
2026-06-17 N122PA - Jun 17, 01:10 UTCJun 17, 03:35 UTC2h 25m
2026-06-16 N122PA - Jun 16, 21:05 UTCJun 16, 23:50 UTC2h 45m
2026-06-09 N122PA - Jun 9, 19:50 UTCJun 9, 20:05 UTC15m
2026-06-09 N122PA - Jun 9, 14:50 UTCJun 9, 15:15 UTC25m
2026-06-05 N122PA - Jun 5, 22:50 UTCJun 5, 23:20 UTC30m
2026-06-05 N122PA - Jun 5, 21:10 UTCJun 5, 21:50 UTC40m
2026-06-04 N122PA - Jun 4, 20:35 UTCJun 4, 20:50 UTC15m
2026-06-04 N122PA - Jun 4, 19:20 UTCJun 4, 19:50 UTC30m
2026-06-04 N122PA - Jun 4, 15:20 UTCJun 4, 17:45 UTC2h 25m
2026-06-03 N122PA AGO → FLL Jun 3, 21:30 UTCJun 3, 23:45 UTC2h 15m
2026-05-22 N122PA - May 22, 20:20 UTCMay 22, 21:35 UTC1h 15m
2026-05-22 N122PA - May 22, 18:25 UTCMay 22, 19:35 UTC1h 10m
2026-05-20 N122PA - May 20, 20:25 UTCMay 20, 22:25 UTC2h 0m
2026-05-19 N122PA - May 19, 17:45 UTCMay 19, 19:30 UTC1h 45m
2026-05-18 N122PA - May 18, 22:15 UTCMay 18, 22:45 UTC30m
2026-05-18 N122PA AUZ → JBR May 18, 19:45 UTCMay 18, 21:35 UTC1h 50m
2026-05-17 N122PA - May 17, 21:15 UTCMay 17, 22:40 UTC1h 25m
2026-05-15 N122PA - May 15, 02:40 UTCMay 15, 03:30 UTC50m
2026-05-15 N122PA - May 15, 01:05 UTCMay 15, 02:00 UTC55m
2026-05-14 N122PA - May 14, 12:00 UTCMay 14, 12:25 UTC25m
2026-05-14 N122PA - May 14, 01:50 UTCMay 14, 02:20 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 N122PA page for operator, model, and routing details .

Mode-S A05C66 frequently asked

What is Mode-S code A05C66?
A05C66 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N122PA.
Where is Mode-S A05C66 registered?
Mode-S code A05C66 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 A05C66 broadcasting right now?
No active broadcast right now. Last signal was Jul 23, 20:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A05C66, octal 50056146, decimal 10,509,414.
What flights does A05C66 operate?
Mode-S A05C66 has broadcast 1 distinct callsign, including N122PA.