Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

A61FD8

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N494KC · PILATUS PC-12 · operated by SWIFT CREEK LLC

Hex
A61FD8
Octal
51417730
Decimal
10,887,128
Country
US
Tail
N494KC
Type
PC12
No current signal · last broadcast 7h ago
Flights observed
71
Distinct callsigns
2
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A61FD8.

Country allocation

The ICAO 24-bit address A61FD8 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 2 distinct

Callsign Airline Flights Last seen
PXT494 - 68 2026-07-17
N494KC - 3 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 PXT494 - Jul 17, 21:30 UTCJul 18, 00:45 UTC3h 15m
2026-07-17 PXT494 - Jul 17, 19:15 UTCJul 17, 20:44 UTC1h 30m
2026-07-17 PXT494 - Jul 17, 16:04 UTCJul 17, 17:30 UTC1h 25m
2026-07-17 PXT494 - Jul 17, 14:20 UTCJul 17, 15:15 UTC55m
2026-07-16 PXT494 - Jul 16, 23:44 UTCJul 17, 00:35 UTC50m
2026-07-16 PXT494 - Jul 16, 21:10 UTCJul 16, 22:40 UTC1h 30m
2026-07-16 PXT494 - Jul 16, 19:30 UTCJul 16, 19:50 UTC20m
2026-07-16 PXT494 - Jul 16, 15:14 UTCJul 16, 16:05 UTC50m
2026-07-15 PXT494 - Jul 15, 23:45 UTCJul 16, 00:35 UTC50m
2026-07-15 PXT494 - Jul 15, 20:15 UTCJul 15, 21:50 UTC1h 35m
2026-07-15 PXT494 - Jul 15, 18:10 UTCJul 15, 19:10 UTC1h 0m
2026-07-15 PXT494 - Jul 15, 16:40 UTCJul 15, 17:35 UTC55m
2026-07-13 PXT494 NUQ → SQL Jul 13, 01:45 UTCJul 13, 01:55 UTC10m
2026-07-13 PXT494 - Jul 13, 00:10 UTCJul 13, 00:50 UTC40m
2026-07-12 PXT494 - Jul 12, 22:35 UTCJul 12, 22:50 UTC15m
2026-07-12 PXT494 - Jul 12, 19:40 UTCJul 12, 21:25 UTC1h 45m
2026-07-12 PXT494 - Jul 12, 17:40 UTCJul 12, 18:30 UTC50m
2026-07-12 PXT494 - Jul 12, 16:10 UTCJul 12, 16:55 UTC45m
2026-07-11 N494KC OAK → SQL Jul 11, 19:15 UTCJul 11, 19:30 UTC15m
2026-07-09 PXT494 - Jul 9, 00:30 UTCJul 9, 01:15 UTC45m
2026-07-08 PXT494 - Jul 8, 21:35 UTCJul 8, 22:15 UTC40m
2026-07-08 PXT494 SQL → SJC Jul 8, 20:15 UTCJul 8, 20:30 UTC15m
2026-07-08 PXT494 CGZ → SQL Jul 8, 00:05 UTCJul 8, 02:45 UTC2h 40m
2026-07-07 PXT494 SQL → CGZ Jul 7, 15:55 UTCJul 7, 18:30 UTC2h 35m
2026-07-07 PXT494 - Jul 7, 02:50 UTCJul 7, 03:45 UTC55m
2026-07-06 PXT494 - Jul 6, 17:05 UTCJul 6, 17:40 UTC35m
2026-07-06 PXT494 - Jul 6, 03:30 UTCJul 6, 06:05 UTC2h 35m
2026-07-06 PXT494 - Jul 6, 01:45 UTCJul 6, 02:45 UTC1h 0m
2026-07-05 PXT494 - Jul 5, 23:30 UTCJul 6, 01:00 UTC1h 30m
2026-07-03 PXT494 - Jul 3, 17:35 UTCJul 3, 18:40 UTC1h 5m
2026-07-03 PXT494 - Jul 3, 15:55 UTCJul 3, 16:55 UTC1h 0m
2026-06-30 PXT494 - Jun 30, 23:15 UTCJul 1, 01:50 UTC2h 35m
2026-06-30 PXT494 SQL → CGZ Jun 30, 15:20 UTCJun 30, 17:50 UTC2h 30m
2026-06-30 PXT494 OAK → SQL Jun 30, 13:30 UTCJun 30, 13:50 UTC20m
2026-06-26 PXT494 - Jun 26, 07:24 UTCJun 26, 07:30 UTC5m
2026-06-26 PXT494 SMO → SQL Jun 26, 05:30 UTCJun 26, 06:50 UTC1h 20m
2026-06-25 PXT494 SQL → SMO Jun 25, 15:50 UTCJun 25, 17:09 UTC1h 20m
2026-06-25 PXT494 OAK → SQL Jun 25, 13:40 UTCJun 25, 13:59 UTC20m
2026-06-23 PXT494 - Jun 23, 22:10 UTCJun 23, 23:10 UTC1h 0m
2026-06-23 PXT494 - Jun 23, 19:59 UTCJun 23, 21:20 UTC1h 20m
2026-06-23 PXT494 - Jun 23, 17:39 UTCJun 23, 18:45 UTC1h 5m
2026-06-23 PXT494 - Jun 23, 16:05 UTCJun 23, 16:59 UTC55m
2026-06-23 PXT494 OAK → SQL Jun 23, 14:25 UTCJun 23, 14:49 UTC25m
2026-06-21 PXT494 - Jun 21, 22:10 UTCJun 21, 23:00 UTC50m
2026-06-21 PXT494 - Jun 21, 20:50 UTCJun 21, 21:14 UTC25m
2026-06-21 PXT494 - Jun 21, 17:20 UTCJun 21, 17:50 UTC30m
2026-06-21 PXT494 - Jun 21, 15:49 UTCJun 21, 16:44 UTC55m
2026-06-14 PXT494 SMO → OAK Jun 14, 19:55 UTCJun 14, 21:10 UTC1h 15m
2026-06-14 PXT494 - Jun 14, 17:40 UTCJun 14, 19:10 UTC1h 30m
2026-06-14 PXT494 OAK → STS Jun 14, 15:20 UTCJun 14, 15:50 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 N494KC page for operator, model, and routing details .

Mode-S A61FD8 frequently asked

What is Mode-S code A61FD8?
A61FD8 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N494KC.
Where is Mode-S A61FD8 registered?
Mode-S code A61FD8 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 A61FD8 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A61FD8, octal 51417730, decimal 10,887,128.
What flights does A61FD8 operate?
Mode-S A61FD8 has broadcast 2 distinct callsigns, including PXT494, N494KC.