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sensors Mode-S transponder

AD1284

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N941SW · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
AD1284
Octal
53211204
Decimal
11,342,468
Country
US
Tail
N941SW
Type
CRJ2
No current signal · last broadcast Jul 26, 22:40 UTC
Flights observed
465
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:40 UTC

Last known position

Most recent position reported by Mode-S AD1284.

Country allocation

The ICAO 24-bit address AD1284 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
SKW4674 - 7 2026-07-19
SKW5027 - 6 2026-06-24
SKW5020 SkyWest Airlines 6 2026-06-11
SKW5116 - 5 2026-07-20
SKW5058 - 5 2026-07-06
SKW5053 - 5 2026-07-18
SKW5912 SkyWest Airlines 4 2026-05-15
SKW5742 - 4 2026-07-19
SKW5368 - 4 2026-07-10
SKW5095 - 4 2026-07-20
SKW5087 - 4 2026-07-15
SKW5044 - 4 2026-07-06
SKW5042 - 4 2026-06-23
SKW4735 - 4 2026-07-07
SKW4658 SkyWest Airlines 4 2026-05-31
SKW380F - 4 2026-07-20
SKW753F - 3 2026-07-06
SKW6065 - 3 2026-06-22
SKW6026 - 3 2026-07-07
SKW5981 - 3 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5817 DEN → DRO Jul 26, 22:10 UTCJul 26, 22:40 UTC30m
2026-07-26 SKW5024 CYS → DEN Jul 26, 19:55 UTCJul 26, 20:20 UTC25m
2026-07-26 SKW5024 CYS → DEN Jul 26, 18:50 UTCJul 26, 19:10 UTC20m
2026-07-26 SKW5400 ORD → GRR Jul 26, 16:35 UTCJul 26, 17:00 UTC25m
2026-07-25 SKW5308 EUG → SFO Jul 25, 23:20 UTCJul 25, 23:40 UTC20m
2026-07-25 SKW4657 SJC → DEN Jul 25, 21:35 UTCJul 25, 22:00 UTC25m
2026-07-25 SKW4775 GEG → SFO Jul 25, 20:15 UTCJul 25, 20:40 UTC25m
2026-07-25 SKW5620 ORD → ABE Jul 25, 00:20 UTCJul 25, 01:00 UTC40m
2026-07-24 SKW5294 SAN → SFO Jul 24, 22:40 UTCJul 24, 23:15 UTC35m
2026-07-24 SKW5099 ORD → JST Jul 24, 21:00 UTCJul 24, 21:40 UTC40m
2026-07-24 SKW5089 MEI → IAH Jul 24, 17:55 UTCJul 24, 18:35 UTC40m
2026-07-24 SKW4631 DEN → LBB Jul 24, 15:30 UTCJul 24, 16:15 UTC45m
2026-07-24 SKW4771 ORD → ICT Jul 24, 13:55 UTCJul 24, 14:35 UTC40m
2026-07-24 SKW5051 ORD → LAF Jul 24, 04:10 UTCJul 24, 11:55 UTC7h 45m
2026-07-24 SKW5133 EAR → DEN Jul 24, 01:35 UTCJul 24, 02:50 UTC1h 15m
2026-07-24 SKW5133 EAR → DEN Jul 24, 01:41 UTCJul 24, 02:34 UTC53m
2026-07-23 SKW450X DEN → LBL Jul 23, 22:45 UTCJul 23, 23:30 UTC45m
2026-07-23 SKW450X DEN → LBL Jul 23, 22:46 UTCJul 23, 23:30 UTC44m
2026-07-23 SKW5113 ORD → JST Jul 23, 20:35 UTCJul 23, 21:45 UTC1h 10m
2026-07-23 SKW5113 ORD → JST Jul 23, 18:00 UTCJul 23, 19:05 UTC1h 5m
2026-07-23 SKW5096 DIK → DEN Jul 23, 05:15 UTCJul 23, 15:55 UTC10h 40m
2026-07-23 SKW5755 GJT → DEN Jul 23, 03:30 UTCJul 23, 04:15 UTC45m
2026-07-23 SKW4770 DEN → GJT Jul 23, 00:00 UTCJul 23, 00:40 UTC40m
2026-07-22 SKW4770 DEN → GJT Jul 22, 23:01 UTCJul 23, 00:32 UTC1h 31m
2026-07-22 SKW5127 PRC → DEN Jul 22, 15:45 UTCJul 22, 17:00 UTC1h 15m
2026-07-22 SKW5127 PRC → DEN Jul 22, 15:55 UTCJul 22, 16:56 UTC1h 1m
2026-07-21 SKW394P - Jul 21, 20:40 UTCJul 21, 21:30 UTC50m
2026-07-21 SKW376U PRC → LAX Jul 21, 18:15 UTCJul 21, 19:10 UTC55m
2026-07-21 SKW474E DEN → PRC Jul 21, 14:40 UTCJul 21, 15:40 UTC1h 0m
2026-07-21 SKW5130 - Jul 21, 11:45 UTCJul 21, 12:20 UTC35m
2026-07-21 SKW355X DEN → RIW Jul 21, 02:45 UTCJul 21, 03:30 UTC45m
2026-07-20 SKW453A DEN → HYS Jul 20, 22:40 UTCJul 21, 01:10 UTC2h 30m
2026-07-20 SKW5116 - Jul 20, 20:55 UTCJul 20, 21:45 UTC50m
2026-07-20 SKW5116 RKS → DEN Jul 20, 20:40 UTCJul 20, 21:36 UTC56m
2026-07-20 SKW380F - Jul 20, 18:40 UTCJul 20, 19:00 UTC20m
2026-07-20 SKW5095 - Jul 20, 16:20 UTCJul 20, 17:00 UTC40m
2026-07-20 SKW5095 DDC → DEN Jul 20, 16:19 UTCJul 20, 16:56 UTC37m
2026-07-20 SKW442L - Jul 20, 14:25 UTCJul 20, 14:55 UTC30m
2026-07-20 SKW5137 HYS → DEN Jul 20, 02:55 UTCJul 20, 12:30 UTC9h 35m
2026-07-19 SKW6068 - Jul 19, 23:15 UTCJul 20, 00:40 UTC1h 25m
2026-07-19 SKW441K DEN → DVL Jul 19, 20:40 UTCJul 19, 22:00 UTC1h 20m
2026-07-19 SKW5742 - Jul 19, 19:10 UTCJul 19, 19:40 UTC30m
2026-07-19 SKW4674 - Jul 19, 16:55 UTCJul 19, 17:20 UTC25m
2026-07-19 SKW4736 - Jul 19, 15:15 UTCJul 19, 16:00 UTC45m
2026-07-19 SKW5585 DEN → CPR Jul 19, 00:35 UTCJul 19, 01:15 UTC40m
2026-07-19 SKW5585 DEN → CPR Jul 19, 00:29 UTCJul 19, 01:12 UTC43m
2026-07-18 SKW5096 DIK → DEN Jul 18, 22:10 UTCJul 18, 22:55 UTC45m
2026-07-18 SKW5096 DIK → DEN Jul 18, 22:00 UTCJul 18, 22:57 UTC57m
2026-07-18 SKW6081 - Jul 18, 19:45 UTCJul 18, 20:25 UTC40m
2026-07-18 SKW6081 DEN → DIK Jul 18, 19:50 UTCJul 18, 20:59 UTC1h 9m

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 N941SW page for operator, model, and routing details .

Mode-S AD1284 frequently asked

What is Mode-S code AD1284?
AD1284 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N941SW.
Where is Mode-S AD1284 registered?
Mode-S code AD1284 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 AD1284 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD1284, octal 53211204, decimal 11,342,468.
What flights does AD1284 operate?
Mode-S AD1284 has broadcast 20 distinct callsigns, including SKW4674, SKW5027, SKW5020, SKW5116, SKW5058.