Apparatus

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sensors Mode-S transponder

A66316

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N510SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A66316
Octal
51461426
Decimal
10,904,342
Country
US
Tail
N510SY
Type
E75L
No current signal · last broadcast Jul 26, 20:15 UTC
Flights observed
708
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:15 UTC

Last known position

Most recent position reported by Mode-S A66316.

Country allocation

The ICAO 24-bit address A66316 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 20 distinct

Callsign Airline Flights Last seen
SKW6415 SkyWest Airlines 21 2026-06-05
SKW4995 - 19 2026-07-13
SKW4925 SkyWest Airlines 19 2026-07-25
SKW4968 SkyWest Airlines 17 2026-07-24
SKW4915 SkyWest Airlines 17 2026-07-24
SKW6253 SkyWest Airlines 15 2026-07-23
SKW6425 SkyWest Airlines 13 2026-06-17
SKW4934 SkyWest Airlines 13 2026-07-26
SKW4985 SkyWest Airlines 12 2026-05-12
SKW4977 - 12 2026-07-08
SKW6475 SkyWest Airlines 11 2026-07-22
SKW6460 SkyWest Airlines 11 2026-05-08
SKW6221 - 11 2026-07-02
SKW6220 SkyWest Airlines 11 2026-07-26
SKW6188 - 11 2026-07-01
SKW6272 - 10 2026-07-04
SKW6393 SkyWest Airlines 9 2026-07-04
SKW6336 - 9 2026-07-01
SKW6294 - 9 2026-06-28
SKW4971 - 9 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6220 BFL → PHX Jul 26, 19:10 UTCJul 26, 20:15 UTC1h 5m
2026-07-26 SKW6367 ORD → DTW Jul 26, 17:40 UTCJul 26, 18:10 UTC30m
2026-07-26 SKW6367 ORD → DTW Jul 26, 16:00 UTCJul 26, 16:25 UTC25m
2026-07-26 SKW6360 ORD → LEX Jul 26, 12:25 UTCJul 26, 14:35 UTC2h 10m
2026-07-26 SKW6360 ORD → LEX Jul 26, 12:18 UTCJul 26, 14:35 UTC2h 17m
2026-07-26 SKW6292 ORD → ICT Jul 26, 03:55 UTCJul 26, 05:55 UTC2h 0m
2026-07-26 SKW4934 PHX → MFR Jul 26, 00:55 UTCJul 26, 02:45 UTC1h 50m
2026-07-25 SKW4934 PHX → MFR Jul 25, 21:55 UTCJul 25, 23:45 UTC1h 50m
2026-07-25 SKW4925 PHX → HMO Jul 25, 19:30 UTCJul 25, 20:25 UTC55m
2026-07-25 SKW4925 PHX → HMO Jul 25, 19:21 UTCJul 25, 20:19 UTC58m
2026-07-25 SKW4925 PHX → HMO Jul 25, 17:40 UTCJul 25, 18:35 UTC55m
2026-07-25 SKW6431 GJT → PHX Jul 25, 15:05 UTCJul 25, 15:30 UTC25m
2026-07-25 SKW6431 GJT → PHX Jul 25, 14:48 UTCJul 25, 16:01 UTC1h 13m
2026-07-25 SKW6318 PHX → GJT Jul 25, 05:00 UTCJul 25, 05:50 UTC50m
2026-07-24 SKW4968 LEX → ORD Jul 24, 23:55 UTCJul 25, 01:20 UTC1h 25m
2026-07-24 SKW4968 LEX → ORD Jul 24, 23:47 UTCJul 25, 01:19 UTC1h 32m
2026-07-24 SKW4968 LEX → ORD Jul 24, 21:45 UTCJul 24, 23:00 UTC1h 15m
2026-07-24 SKW4978 DFW → TUL Jul 24, 18:30 UTCJul 24, 19:00 UTC30m
2026-07-24 SKW4978 DFW → TUL Jul 24, 16:05 UTCJul 24, 16:35 UTC30m
2026-07-24 SKW6401 MFR → PHX Jul 24, 12:40 UTCJul 24, 14:45 UTC2h 5m
2026-07-24 SKW6401 MFR → PHX Jul 24, 12:35 UTCJul 24, 14:41 UTC2h 6m
2026-07-24 SKW4915 ORD → MLI Jul 24, 04:30 UTCJul 24, 06:30 UTC2h 0m
2026-07-24 SKW4944 PHX → PSC Jul 24, 01:50 UTCJul 24, 02:55 UTC1h 5m
2026-07-23 SKW4944 PHX → PSC Jul 23, 23:55 UTCJul 24, 00:55 UTC1h 0m
2026-07-23 SKW6253 ORD → SGF Jul 23, 20:30 UTCJul 23, 22:35 UTC2h 5m
2026-07-23 SKW6253 ORD → SGF Jul 23, 20:31 UTCJul 23, 22:27 UTC1h 56m
2026-07-23 SKW6253 ORD → SGF Jul 23, 17:35 UTCJul 23, 19:30 UTC1h 55m
2026-07-23 SKW4983 CID → PHX Jul 23, 13:05 UTCJul 23, 15:55 UTC2h 50m
2026-07-23 SKW4982 STL → DFW Jul 23, 02:25 UTCJul 23, 05:20 UTC2h 55m
2026-07-22 SKW6220 BFL → PHX Jul 22, 22:25 UTCJul 23, 00:40 UTC2h 15m
2026-07-22 SKW6220 BFL → PHX Jul 22, 19:10 UTCJul 22, 21:10 UTC2h 0m
2026-07-22 SKW6475 PHX → DRO Jul 22, 14:25 UTCJul 22, 16:20 UTC1h 55m
2026-07-22 SKW6475 PHX → DRO Jul 22, 14:24 UTCJul 22, 16:12 UTC1h 48m
2026-07-22 SKW4975 SJT → DFW Jul 22, 03:20 UTCJul 22, 04:20 UTC1h 0m
2026-07-22 SKW4975 SJT → DFW Jul 22, 03:13 UTCJul 22, 04:19 UTC1h 6m
2026-07-22 SKW4975 SJT → DFW Jul 22, 00:50 UTCJul 22, 02:05 UTC1h 15m
2026-07-21 SKW6416 LAX → SFO Jul 21, 19:44 UTCJul 21, 21:53 UTC2h 9m
2026-07-21 SKW6416 LAX → SFO Jul 21, 16:40 UTCJul 21, 21:50 UTC5h 10m
2026-07-21 SKW4900 - Jul 21, 14:15 UTCJul 21, 14:40 UTC25m
2026-07-21 SKW6315 LAX → ABQ Jul 21, 02:42 UTCJul 21, 03:45 UTC1h 3m
2026-07-21 SKW6315 LAX → ABQ Jul 21, 02:35 UTCJul 21, 03:45 UTC1h 10m
2026-07-20 SKW6270 - Jul 20, 23:00 UTCJul 21, 01:30 UTC2h 30m
2026-07-20 SKW6270 - Jul 20, 19:40 UTCJul 20, 21:25 UTC1h 45m
2026-07-20 SKW6428 PHX → SLC Jul 20, 17:30 UTCJul 20, 18:30 UTC1h 0m
2026-07-20 SKW6428 PHX → SLC Jul 20, 17:26 UTCJul 20, 18:29 UTC1h 3m
2026-07-20 SKW4911 DFW → DRO Jul 20, 14:40 UTCJul 20, 16:20 UTC1h 40m
2026-07-20 SKW4911 DFW → DRO Jul 20, 14:39 UTCJul 20, 16:29 UTC1h 50m
2026-07-20 SKW6328 DRO → PHX Jul 20, 12:25 UTCJul 20, 13:15 UTC50m
2026-07-20 SKW6334 PHX → DRO Jul 20, 05:00 UTCJul 20, 05:40 UTC40m
2026-07-20 SKW6435 - Jul 20, 02:20 UTCJul 20, 03:40 UTC1h 20m

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 N510SY page for operator, model, and routing details .

Mode-S A66316 frequently asked

What is Mode-S code A66316?
A66316 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N510SY.
Where is Mode-S A66316 registered?
Mode-S code A66316 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 A66316 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A66316, octal 51461426, decimal 10,904,342.
What flights does A66316 operate?
Mode-S A66316 has broadcast 20 distinct callsigns, including SKW6415, SKW4995, SKW4925, SKW4968, SKW4915.