Apparatus

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sensors Mode-S transponder

A6666E

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N511PC · SOCATA TB-9 Tampico · operated by CLEAR SKIES AVIONICS INC

Hex
A6666E
Octal
51463156
Decimal
10,905,198
Country
US
Tail
N511PC
Type
TAMP
No current signal · last broadcast 4d ago
Flights observed
116
Distinct callsigns
1
Country
US
Last broadcast
4d ago

Last known position

Most recent position reported by Mode-S A6666E.

Country allocation

The ICAO 24-bit address A6666E 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
N511PC - 116 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-09 N511PC - Jul 9, 13:50 UTCJul 9, 14:35 UTC45m
2026-07-08 N511PC PIE → PIE Jul 8, 23:10 UTCJul 8, 23:50 UTC40m
2026-07-08 N511PC PIE → PIE Jul 8, 19:55 UTCJul 8, 20:15 UTC20m
2026-07-08 N511PC - Jul 8, 13:55 UTCJul 8, 14:15 UTC20m
2026-07-07 N511PC PIE → PIE Jul 7, 19:50 UTCJul 7, 20:00 UTC10m
2026-07-07 N511PC PIE → PIE Jul 7, 13:50 UTCJul 7, 14:20 UTC30m
2026-07-06 N511PC PIE → PIE Jul 6, 17:45 UTCJul 6, 18:20 UTC35m
2026-07-01 N511PC PIE → PIE Jul 1, 11:55 UTCJul 1, 12:45 UTC50m
2026-06-30 N511PC PIE → PIE Jun 30, 15:35 UTCJun 30, 16:15 UTC40m
2026-06-30 N511PC - Jun 30, 11:30 UTCJun 30, 12:30 UTC1h 0m
2026-06-27 N511PC PIE → PIE Jun 27, 11:50 UTCJun 27, 12:39 UTC50m
2026-06-26 N511PC - Jun 26, 19:45 UTCJun 26, 20:50 UTC1h 5m
2026-06-26 N511PC PIE → PIE Jun 26, 13:40 UTCJun 26, 14:05 UTC25m
2026-06-26 N511PC PIE → PIE Jun 26, 11:49 UTCJun 26, 12:34 UTC45m
2026-06-25 N511PC PIE → PIE Jun 25, 19:39 UTCJun 25, 20:30 UTC50m
2026-06-24 N511PC - Jun 24, 16:14 UTCJun 24, 16:40 UTC25m
2026-06-24 N511PC PIE → PIE Jun 24, 11:34 UTCJun 24, 12:30 UTC55m
2026-06-23 N511PC PIE → PIE Jun 23, 17:30 UTCJun 23, 18:14 UTC45m
2026-06-23 N511PC - Jun 23, 15:55 UTCJun 23, 16:35 UTC40m
2026-06-23 N511PC PIE → PIE Jun 23, 13:29 UTCJun 23, 14:10 UTC40m
2026-06-22 N511PC - Jun 22, 19:54 UTCJun 22, 20:30 UTC35m
2026-06-22 N511PC PIE → PIE Jun 22, 13:44 UTCJun 22, 14:34 UTC50m
2026-06-19 N511PC PIE → PIE Jun 19, 16:04 UTCJun 19, 16:39 UTC35m
2026-06-19 N511PC - Jun 19, 11:49 UTCJun 19, 13:59 UTC2h 10m
2026-06-17 N511PC - Jun 17, 15:46 UTCJun 17, 16:30 UTC45m
2026-06-17 N511PC - Jun 17, 13:55 UTCJun 17, 14:45 UTC50m
2026-06-17 N511PC - Jun 17, 11:35 UTCJun 17, 13:05 UTC1h 30m
2026-06-16 N511PC PIE → PIE Jun 16, 19:45 UTCJun 16, 20:25 UTC41m
2026-06-16 N511PC PIE → PIE Jun 16, 17:35 UTCJun 16, 18:20 UTC45m
2026-06-16 N511PC - Jun 16, 15:35 UTCJun 16, 16:00 UTC25m
2026-06-16 N511PC - Jun 16, 11:35 UTCJun 16, 13:04 UTC1h 30m
2026-06-13 N511PC PIE → PIE Jun 13, 17:40 UTCJun 13, 18:15 UTC35m
2026-06-13 N511PC - Jun 13, 11:20 UTCJun 13, 11:50 UTC30m
2026-06-12 N511PC - Jun 12, 15:35 UTCJun 12, 16:15 UTC40m
2026-06-12 N511PC - Jun 12, 14:05 UTCJun 12, 14:35 UTC30m
2026-06-12 N511PC - Jun 12, 12:15 UTCJun 12, 12:35 UTC20m
2026-06-10 N511PC - Jun 10, 15:45 UTCJun 10, 16:25 UTC40m
2026-05-30 N511PC - May 30, 19:50 UTCMay 30, 20:55 UTC1h 5m
2026-05-30 N511PC - May 30, 11:40 UTCMay 30, 12:30 UTC50m
2026-05-29 N511PC - May 29, 16:00 UTCMay 29, 17:00 UTC1h 0m
2026-05-29 N511PC - May 29, 13:35 UTCMay 29, 14:15 UTC40m
2026-05-28 N511PC - May 28, 15:45 UTCMay 28, 16:25 UTC40m
2026-05-26 N511PC PIE → PIE May 26, 11:34 UTCMay 26, 12:30 UTC55m
2026-05-23 N511PC PIE → PIE May 23, 16:00 UTCMay 23, 16:40 UTC40m
2026-05-21 N511PC - May 21, 15:20 UTCMay 21, 16:20 UTC1h 0m
2026-05-21 N511PC - May 21, 13:25 UTCMay 21, 14:05 UTC40m
2026-05-21 N511PC - May 21, 11:45 UTCMay 21, 12:25 UTC40m
2026-05-20 N511PC - May 20, 15:45 UTCMay 20, 16:30 UTC45m
2026-05-20 N511PC - May 20, 14:00 UTCMay 20, 14:55 UTC55m
2026-05-19 N511PC - May 19, 13:25 UTCMay 19, 14:10 UTC45m

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 N511PC page for operator, model, and routing details .

Mode-S A6666E frequently asked

What is Mode-S code A6666E?
A6666E is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N511PC.
Where is Mode-S A6666E registered?
Mode-S code A6666E 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 A6666E broadcasting right now?
No active broadcast right now. Last signal was 4d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A6666E, octal 51463156, decimal 10,905,198.
What flights does A6666E operate?
Mode-S A6666E has broadcast 1 distinct callsign, including N511PC.