Apparatus

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sensors Mode-S transponder

AD2517

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N946SW · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
AD2517
Octal
53222427
Decimal
11,347,223
Country
US
Tail
N946SW
Type
CRJ2
No current signal · last broadcast 1h ago
Flights observed
704
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S AD2517.

Country allocation

The ICAO 24-bit address AD2517 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
SKW5737 - 30 2026-07-06
SKW5707 - 27 2026-07-06
SKW5557 - 27 2026-07-07
SKW5338 - 27 2026-07-06
SKW4779 - 27 2026-07-06
SKW5942 - 26 2026-07-06
SKW4729 - 26 2026-07-07
SKW5738 - 25 2026-07-07
SKW5502 - 25 2026-07-07
SKW5271 - 25 2026-07-08
SKW5796 - 23 2026-07-08
SKW5961 - 22 2026-07-08
SKW5592 - 22 2026-07-07
SKW410Z - 19 2026-07-07
SKW6018 - 18 2026-07-06
SKW338F - 11 2026-07-07
SKW308R SkyWest Airlines 11 2026-06-20
SKW6022 SkyWest Airlines 5 2026-05-18
SKW5214 SkyWest Airlines 5 2026-04-25
SKW6026 SkyWest Airlines 4 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW337Y - Jul 14, 03:30 UTCJul 14, 03:45 UTC15m
2026-07-13 SKW4650 DEN → DEN Jul 13, 23:00 UTCJul 14, 02:15 UTC3h 15m
2026-07-13 SKW5649 LNK → DEN Jul 13, 20:48 UTCJul 13, 21:45 UTC57m
2026-07-13 SKW5649 LNK → DEN Jul 13, 20:40 UTCJul 13, 21:45 UTC1h 5m
2026-07-13 SKW5831 - Jul 13, 16:10 UTCJul 13, 17:15 UTC1h 5m
2026-07-13 SKW4677 COS → DEN Jul 13, 14:09 UTCJul 13, 14:40 UTC31m
2026-07-13 SKW4677 COS → DEN Jul 13, 14:15 UTCJul 13, 14:40 UTC25m
2026-07-13 SKW741Y DEN → COS Jul 13, 05:25 UTCJul 13, 05:45 UTC20m
2026-07-13 SKW5590 - Jul 13, 02:40 UTCJul 13, 03:50 UTC1h 10m
2026-07-13 SKW5845 - Jul 13, 01:25 UTCJul 13, 01:45 UTC20m
2026-07-13 SKW5845 SHR → BIL Jul 13, 01:20 UTCJul 13, 01:28 UTC8m
2026-07-12 SKW5845 - Jul 12, 20:10 UTCJul 12, 21:25 UTC1h 15m
2026-07-12 SKW5522 - Jul 12, 16:40 UTCJul 12, 17:25 UTC45m
2026-07-12 SKW5518 DEN → GCC Jul 12, 14:20 UTCJul 12, 14:57 UTC37m
2026-07-12 SKW5518 - Jul 12, 14:10 UTCJul 12, 14:45 UTC35m
2026-07-12 SKW6072 - Jul 12, 12:10 UTCJul 12, 12:50 UTC40m
2026-07-12 SKW357Z DEN → EAR Jul 12, 03:09 UTCJul 12, 03:42 UTC33m
2026-07-12 SKW357Z - Jul 12, 03:01 UTCJul 12, 03:30 UTC30m
2026-07-11 SKW6007 - Jul 11, 23:25 UTCJul 12, 00:50 UTC1h 25m
2026-07-11 SKW6007 MAF → DEN Jul 11, 23:14 UTCJul 12, 00:49 UTC1h 35m
2026-07-11 SKW5207 - Jul 11, 20:30 UTCJul 11, 21:45 UTC1h 15m
2026-07-11 SKW5829 - Jul 11, 17:50 UTCJul 11, 19:10 UTC1h 20m
2026-07-11 SKW5829 BIL → DEN Jul 11, 17:52 UTCJul 11, 19:00 UTC1h 8m
2026-07-11 SKW490U - Jul 11, 15:45 UTCJul 11, 16:55 UTC1h 10m
2026-07-11 SKW5057 - Jul 11, 01:55 UTCJul 11, 03:15 UTC1h 20m
2026-07-11 SKW5057 ROW → DEN Jul 11, 01:45 UTCJul 11, 03:11 UTC1h 26m
2026-07-10 SKW768J - Jul 10, 22:25 UTCJul 10, 23:30 UTC1h 5m
2026-07-10 SKW6065 - Jul 10, 20:35 UTCJul 10, 21:25 UTC50m
2026-07-10 SKW6065 - Jul 10, 18:30 UTCJul 10, 19:10 UTC40m
2026-07-10 SKW4631 - Jul 10, 15:40 UTCJul 10, 16:25 UTC45m
2026-07-10 SKW4771 - Jul 10, 14:00 UTCJul 10, 14:40 UTC40m
2026-07-10 SKW4771 DEN → CPR Jul 10, 13:59 UTCJul 10, 14:37 UTC38m
2026-07-10 SKW5032 - Jul 10, 12:15 UTCJul 10, 12:55 UTC40m
2026-07-10 SKW5032 COD → DEN Jul 10, 11:34 UTCJul 10, 13:05 UTC1h 31m
2026-07-10 SKW406P - Jul 10, 03:50 UTCJul 10, 04:35 UTC45m
2026-07-10 SKW5103 COD → DEN Jul 10, 01:18 UTCJul 10, 02:28 UTC1h 10m
2026-07-09 SKW5103 DEN → DEN Jul 9, 22:45 UTCJul 10, 02:35 UTC3h 50m
2026-07-09 SKW5682 - Jul 9, 20:10 UTCJul 9, 21:00 UTC50m
2026-07-09 SKW5682 GCC → DEN Jul 9, 20:05 UTCJul 9, 20:51 UTC46m
2026-07-09 SKW4750 DEN → GCC Jul 9, 17:46 UTCJul 9, 18:43 UTC57m
2026-07-09 SKW4750 - Jul 9, 17:45 UTCJul 9, 18:20 UTC35m
2026-07-09 SKW4631 - Jul 9, 15:40 UTCJul 9, 16:25 UTC45m
2026-07-09 SKW4771 - Jul 9, 14:10 UTCJul 9, 14:50 UTC40m
2026-07-09 SKW5032 COD → DEN Jul 9, 11:49 UTCJul 9, 12:45 UTC56m
2026-07-09 SKW406P - Jul 9, 04:10 UTCJul 9, 04:55 UTC45m
2026-07-09 SKW5227 - Jul 9, 00:25 UTCJul 9, 01:10 UTC45m
2026-07-08 SKW5817 - Jul 8, 22:15 UTCJul 8, 22:55 UTC40m
2026-07-08 SKW5817 DEN → DRO Jul 8, 22:03 UTCJul 8, 22:58 UTC55m
2026-07-08 SKW5191 - Jul 8, 17:50 UTCJul 8, 19:35 UTC1h 45m
2026-07-08 SKW5271 - Jul 8, 04:30 UTCJul 8, 05:00 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 N946SW page for operator, model, and routing details .

Mode-S AD2517 frequently asked

What is Mode-S code AD2517?
AD2517 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N946SW.
Where is Mode-S AD2517 registered?
Mode-S code AD2517 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 AD2517 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD2517, octal 53222427, decimal 11,347,223.
What flights does AD2517 operate?
Mode-S AD2517 has broadcast 20 distinct callsigns, including SKW5737, SKW5707, SKW5557, SKW5338, SKW4779.