Apparatus

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sensors Mode-S transponder

A65D06

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N509SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A65D06
Octal
51456406
Decimal
10,902,790
Country
US
Tail
N509SY
Type
E75L
No current signal · last broadcast Jul 26, 20:25 UTC
Flights observed
641
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 20:25 UTC

Last known position

Most recent position reported by Mode-S A65D06.

Country allocation

The ICAO 24-bit address A65D06 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
SKW4962 - 18 2026-07-18
SKW4915 SkyWest Airlines 17 2026-07-25
SKW6422 SkyWest Airlines 16 2026-05-20
SKW6272 - 15 2026-07-18
SKW4951 SkyWest Airlines 14 2026-07-18
SKW6381 SkyWest Airlines 13 2026-07-23
SKW4944 SkyWest Airlines 13 2026-07-25
SKW6425 - 12 2026-07-14
SKW6415 - 12 2026-07-02
SKW6409 - 12 2026-07-16
SKW6393 - 11 2026-07-15
SKW6307 - 11 2026-07-13
SKW6347 SkyWest Airlines 10 2026-04-17
SKW6278 - 10 2026-07-19
SKW6213 SkyWest Airlines 10 2026-05-15
SKW6212 SkyWest Airlines 10 2026-05-12
SKW6404 - 9 2026-07-06
SKW6366 - 9 2026-07-22
SKW6346 - 9 2026-07-14
SKW6315 - 9 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4925 PHX → HMO Jul 26, 19:20 UTCJul 26, 20:10 UTC50m
2026-07-26 SKW4925 PHX → HMO Jul 26, 17:25 UTCJul 26, 18:20 UTC55m
2026-07-26 SKW4893 YUM → PHX Jul 26, 13:20 UTCJul 26, 15:40 UTC2h 20m
2026-07-26 SKW4893 YUM → PHX Jul 26, 13:20 UTCJul 26, 15:37 UTC2h 17m
2026-07-26 SKW6420 SEA → LAX Jul 26, 03:18 UTCJul 26, 05:29 UTC2h 11m
2026-07-26 SKW6420 SEA → LAX Jul 26, 03:20 UTCJul 26, 05:30 UTC2h 10m
2026-07-26 SKW6368 PHX → ELP Jul 26, 01:25 UTCJul 26, 01:55 UTC30m
2026-07-25 SKW6368 PHX → ELP Jul 25, 23:40 UTCJul 26, 00:15 UTC35m
2026-07-25 SKW4906 PHX → TUS Jul 25, 15:50 UTCJul 25, 22:05 UTC6h 15m
2026-07-25 SKW6401 MFR → PHX Jul 25, 12:25 UTCJul 25, 14:30 UTC2h 5m
2026-07-25 SKW4915 ORD → MLI Jul 25, 04:30 UTCJul 25, 06:25 UTC1h 55m
2026-07-25 SKW4944 PHX → PSC Jul 25, 01:55 UTCJul 25, 03:05 UTC1h 10m
2026-07-24 SKW4944 PHX → PSC Jul 24, 23:55 UTCJul 25, 01:05 UTC1h 10m
2026-07-24 SKW6253 ORD → SGF Jul 24, 20:30 UTCJul 24, 22:30 UTC2h 0m
2026-07-24 SKW6253 ORD → SGF Jul 24, 17:25 UTCJul 24, 19:20 UTC1h 55m
2026-07-24 SKW4893 YUM → PHX Jul 24, 13:25 UTCJul 24, 15:40 UTC2h 15m
2026-07-24 SKW6224 ABQ → LAX Jul 24, 01:50 UTCJul 24, 04:35 UTC2h 45m
2026-07-24 SKW6224 ABQ → LAX Jul 24, 01:47 UTCJul 24, 04:32 UTC2h 45m
2026-07-23 SKW6381 PHX → SEA Jul 23, 20:50 UTCJul 24, 00:05 UTC3h 15m
2026-07-23 SKW6381 PHX → SEA Jul 23, 20:49 UTCJul 24, 00:04 UTC3h 15m
2026-07-23 SKW6381 PHX → SEA Jul 23, 16:50 UTCJul 23, 19:45 UTC2h 55m
2026-07-23 SKW6293 - Jul 23, 11:50 UTCJul 23, 15:20 UTC3h 30m
2026-07-23 SKW6293 STL → LAX Jul 23, 11:46 UTCJul 23, 15:19 UTC3h 33m
2026-07-23 SKW5000 ORD → FSD Jul 23, 01:25 UTCJul 23, 04:55 UTC3h 30m
2026-07-23 SKW5000 ORD → FSD Jul 23, 01:23 UTCJul 23, 04:50 UTC3h 27m
2026-07-22 SKW6366 - Jul 22, 20:30 UTCJul 22, 23:25 UTC2h 55m
2026-07-22 SKW6366 - Jul 22, 16:55 UTCJul 22, 19:35 UTC2h 40m
2026-07-22 SKW6293 - Jul 22, 11:45 UTCJul 22, 15:25 UTC3h 40m
2026-07-22 SKW6293 STL → LAX Jul 22, 11:44 UTCJul 22, 15:20 UTC3h 36m
2026-07-22 SKW5000 ORD → FSD Jul 22, 01:30 UTCJul 22, 05:10 UTC3h 40m
2026-07-21 SKW6381 PHX → SEA Jul 21, 21:00 UTCJul 22, 00:05 UTC3h 5m
2026-07-21 SKW6381 PHX → SEA Jul 21, 16:55 UTCJul 21, 20:00 UTC3h 5m
2026-07-21 SKW6482 - Jul 21, 12:35 UTCJul 21, 15:30 UTC2h 55m
2026-07-21 SKW6482 XNA → LAX Jul 21, 12:31 UTCJul 21, 15:22 UTC2h 51m
2026-07-21 SKW6187 - Jul 21, 01:10 UTCJul 21, 04:20 UTC3h 10m
2026-07-20 SKW6366 - Jul 20, 20:50 UTCJul 20, 23:30 UTC2h 40m
2026-07-20 SKW6366 - Jul 20, 17:00 UTCJul 20, 19:50 UTC2h 50m
2026-07-20 SKW6293 STL → LAX Jul 20, 12:15 UTCJul 20, 15:55 UTC3h 40m
2026-07-20 SKW5000 ORD → FSD Jul 20, 01:25 UTCJul 20, 04:55 UTC3h 30m
2026-07-20 SKW5000 ORD → FSD Jul 20, 01:24 UTCJul 20, 04:49 UTC3h 25m
2026-07-19 SKW6278 - Jul 19, 20:55 UTCJul 19, 23:40 UTC2h 45m
2026-07-19 SKW6278 - Jul 19, 16:55 UTCJul 19, 19:45 UTC2h 50m
2026-07-19 SKW6185 SFO → LAX Jul 19, 12:35 UTCJul 19, 15:25 UTC2h 50m
2026-07-18 SKW4979 DFW → MLU Jul 18, 23:40 UTCJul 19, 02:20 UTC2h 40m
2026-07-18 SKW6272 - Jul 18, 19:55 UTCJul 18, 22:20 UTC2h 25m
2026-07-18 SKW6272 OKC → LAX Jul 18, 19:53 UTCJul 18, 22:20 UTC2h 27m
2026-07-18 SKW6272 - Jul 18, 16:35 UTCJul 18, 19:10 UTC2h 35m
2026-07-18 SKW4951 BNA → ORD Jul 18, 12:10 UTCJul 18, 14:55 UTC2h 45m
2026-07-18 SKW4962 - Jul 18, 01:34 UTCJul 18, 04:10 UTC2h 36m
2026-07-17 SKW6381 PHX → SEA Jul 17, 21:05 UTCJul 18, 00:15 UTC3h 10m

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 N509SY page for operator, model, and routing details .

Mode-S A65D06 frequently asked

What is Mode-S code A65D06?
A65D06 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N509SY.
Where is Mode-S A65D06 registered?
Mode-S code A65D06 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 A65D06 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A65D06, octal 51456406, decimal 10,902,790.
What flights does A65D06 operate?
Mode-S A65D06 has broadcast 20 distinct callsigns, including SKW4962, SKW4915, SKW6422, SKW6272, SKW4951.