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sensors Mode-S transponder

AD8901

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N971SW · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
AD8901
Octal
53304401
Decimal
11,372,801
Country
US
Tail
N971SW
Type
CRJ2
No current signal · last broadcast Jul 26, 21:55 UTC
Flights observed
669
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:55 UTC

Last known position

Most recent position reported by Mode-S AD8901.

Country allocation

The ICAO 24-bit address AD8901 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
SKW4797 - 10 2026-06-22
SKW5077 - 9 2026-06-19
SKW5072 - 9 2026-06-19
SKW5436 SkyWest Airlines 8 2026-07-18
SKW5245 SkyWest Airlines 7 2026-07-26
SKW5113 - 7 2026-06-24
SKW5023 - 7 2026-06-20
SKW4666 SkyWest Airlines 7 2026-05-28
SKW6065 - 6 2026-06-24
SKW5799 SkyWest Airlines 6 2026-07-18
SKW5227 SkyWest Airlines 6 2026-05-30
SKW5087 - 6 2026-06-19
SKW5053 SkyWest Airlines 6 2026-06-12
SKW5031 - 6 2026-06-25
SKW478V SkyWest Airlines 6 2026-07-18
SKW5952 - 5 2026-06-23
SKW5809 - 5 2026-06-22
SKW5743 SkyWest Airlines 5 2026-07-26
SKW5696 SkyWest Airlines 5 2026-05-09
SKW5585 - 5 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4734 DEN → COS Jul 26, 21:00 UTCJul 26, 21:55 UTC55m
2026-07-26 SKW5245 DTW → ORD Jul 26, 18:00 UTCJul 26, 18:45 UTC45m
2026-07-26 SKW5245 DTW → ORD Jul 26, 17:42 UTCJul 26, 18:45 UTC1h 3m
2026-07-26 SKW5743 STS → SFO Jul 26, 15:55 UTCJul 26, 16:30 UTC35m
2026-07-26 SKW4677 CVG → ORD Jul 26, 14:40 UTCJul 26, 15:00 UTC20m
2026-07-26 SKW4744 ONT → SFO Jul 26, 03:20 UTCJul 26, 03:40 UTC20m
2026-07-26 SKW5078 LBL → DEN Jul 26, 00:30 UTCJul 26, 00:55 UTC25m
2026-07-25 SKW577P DEN → JMS Jul 25, 22:55 UTCJul 25, 23:15 UTC20m
2026-07-25 SKW5116 DEN → RKS Jul 25, 21:00 UTCJul 25, 21:25 UTC25m
2026-07-25 SKW380F DEN → HYS Jul 25, 18:35 UTCJul 25, 18:55 UTC20m
2026-07-25 SKW578R DEN → PIR Jul 25, 15:35 UTCJul 25, 16:55 UTC1h 20m
2026-07-25 SKW6056 DEN → SGU Jul 25, 13:15 UTCJul 25, 14:05 UTC50m
2026-07-24 SKW5045 ORD → MGW Jul 24, 22:30 UTCJul 24, 23:55 UTC1h 25m
2026-07-24 SKW524C IAH → MGM Jul 24, 19:35 UTCJul 24, 20:55 UTC1h 20m
2026-07-24 SKW6066 ORD → DEC Jul 24, 17:20 UTCJul 24, 18:15 UTC55m
2026-07-24 SKW535G IAH → MEI Jul 24, 15:10 UTCJul 24, 16:05 UTC55m
2026-07-24 SKW5086 PIB → IAH Jul 24, 11:20 UTCJul 24, 12:50 UTC1h 30m
2026-07-24 SKW5094 ORD → FOD Jul 24, 01:35 UTCJul 24, 03:15 UTC1h 40m
2026-07-23 SKW5073 IAH → VCT Jul 23, 22:40 UTCJul 23, 23:10 UTC30m
2026-07-23 SKW459L IAH → VCT Jul 23, 20:55 UTCJul 23, 21:15 UTC20m
2026-07-23 SKW5139 SLN → ORD Jul 23, 18:55 UTCJul 23, 19:35 UTC40m
2026-07-23 SKW5086 - Jul 23, 17:00 UTCJul 23, 17:40 UTC40m
2026-07-22 SKW5110 PIB → IAH Jul 22, 15:05 UTCJul 22, 15:35 UTC30m
2026-07-22 SKW5110 PIB → IAH Jul 22, 14:54 UTCJul 22, 15:41 UTC47m
2026-07-22 SKW403G IAH → AEX Jul 22, 00:15 UTCJul 22, 00:35 UTC20m
2026-07-21 SKW5327 SBA → SFO Jul 21, 20:40 UTCJul 21, 22:00 UTC1h 20m
2026-07-21 SKW5327 SBA → SFO Jul 21, 20:41 UTCJul 21, 21:57 UTC1h 16m
2026-07-21 SKW5691 SFO → BUR Jul 21, 18:05 UTCJul 21, 19:35 UTC1h 30m
2026-07-21 SKW4637 SFO → ASE Jul 21, 15:55 UTCJul 21, 16:45 UTC50m
2026-07-21 SKW4637 SFO → ASE Jul 21, 15:58 UTCJul 21, 16:25 UTC27m
2026-07-21 SKW4769 CMH → ORD Jul 21, 14:15 UTCJul 21, 14:55 UTC40m
2026-07-21 SKW4769 CMH → ORD Jul 21, 14:16 UTCJul 21, 14:50 UTC34m
2026-07-21 SKW4714 FNT → ORD Jul 21, 11:00 UTCJul 21, 11:45 UTC45m
2026-07-21 SKW5258 RDM → SFO Jul 21, 00:15 UTCJul 21, 00:55 UTC40m
2026-07-20 SKW4718 LNK → ORD Jul 20, 21:25 UTCJul 20, 22:50 UTC1h 25m
2026-07-20 SKW4718 LNK → ORD Jul 20, 21:12 UTCJul 20, 22:27 UTC1h 15m
2026-07-20 SKW5244 - Jul 20, 19:05 UTCJul 20, 20:20 UTC1h 15m
2026-07-20 SKW5953 - Jul 20, 16:00 UTCJul 20, 16:45 UTC45m
2026-07-20 SKW5887 - Jul 20, 14:40 UTCJul 20, 15:00 UTC20m
2026-07-19 SKW5807 PIA → ORD Jul 19, 15:50 UTCJul 19, 16:20 UTC30m
2026-07-19 SKW5949 - Jul 19, 14:30 UTCJul 19, 15:00 UTC30m
2026-07-19 SKW5801 - Jul 19, 11:50 UTCJul 19, 13:15 UTC1h 25m
2026-07-19 SKW5801 CRW → ORD Jul 19, 11:52 UTCJul 19, 12:59 UTC1h 7m
2026-07-19 SKW4784 ORD → CRW Jul 19, 01:00 UTCJul 19, 02:05 UTC1h 5m
2026-07-18 SKW5436 TYS → ORD Jul 18, 23:05 UTCJul 18, 23:40 UTC35m
2026-07-18 SKW5436 TYS → ORD Jul 18, 21:00 UTCJul 18, 23:26 UTC2h 26m
2026-07-18 SKW393H - Jul 18, 20:40 UTCJul 18, 21:05 UTC25m
2026-07-18 SKW393H ORD → FWA Jul 18, 20:43 UTCJul 18, 21:09 UTC26m
2026-07-18 SKW5466 BOI → SFO Jul 18, 15:15 UTCJul 18, 16:50 UTC1h 35m
2026-07-18 SKW5466 BOI → SFO Jul 18, 15:18 UTCJul 18, 16:28 UTC1h 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 N971SW page for operator, model, and routing details .

Mode-S AD8901 frequently asked

What is Mode-S code AD8901?
AD8901 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N971SW.
Where is Mode-S AD8901 registered?
Mode-S code AD8901 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 AD8901 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD8901, octal 53304401, decimal 11,372,801.
What flights does AD8901 operate?
Mode-S AD8901 has broadcast 20 distinct callsigns, including SKW4797, SKW5077, SKW5072, SKW5436, SKW5245.