Apparatus

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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 4h ago
Flights observed
585
Distinct callsigns
20
Country
US
Last broadcast
4h ago

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
SKW5113 - 7 2026-06-24
SKW5023 - 7 2026-06-20
SKW4666 SkyWest Airlines 7 2026-05-28
SKW6065 - 6 2026-06-24
SKW5436 - 6 2026-07-10
SKW5227 SkyWest Airlines 6 2026-05-30
SKW5087 - 6 2026-06-19
SKW5053 SkyWest Airlines 6 2026-06-12
SKW5031 - 6 2026-06-25
SKW5952 - 5 2026-06-23
SKW5809 - 5 2026-06-22
SKW5696 SkyWest Airlines 5 2026-05-09
SKW5585 - 5 2026-06-19
SKW5294 SkyWest Airlines 5 2026-05-27
SKW5245 - 5 2026-06-17
SKW5224 - 5 2026-06-23
SKW5101 SkyWest Airlines 5 2026-06-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SKW478V - Jul 13, 23:55 UTCJul 14, 00:15 UTC20m
2026-07-13 SKW6077 - Jul 13, 19:45 UTCJul 13, 20:40 UTC55m
2026-07-13 SKW546J ORD → CIU Jul 13, 17:48 UTCJul 13, 18:12 UTC24m
2026-07-13 SKW546J - Jul 13, 17:15 UTCJul 13, 17:30 UTC15m
2026-07-13 SKW5981 - Jul 13, 15:15 UTCJul 13, 15:40 UTC25m
2026-07-13 SKW5981 FWA → ORD Jul 13, 15:09 UTCJul 13, 15:27 UTC18m
2026-07-12 SKW4630 ORD → FWA Jul 12, 21:12 UTCJul 12, 21:16 UTC4m
2026-07-12 SKW4630 - Jul 12, 20:50 UTCJul 12, 21:15 UTC25m
2026-07-12 SKW4752 CAK → ORD Jul 12, 18:15 UTCJul 12, 19:25 UTC1h 10m
2026-07-12 SKW519Y - Jul 12, 16:20 UTCJul 12, 17:20 UTC1h 0m
2026-07-12 SKW519Y ORD → CAK Jul 12, 16:32 UTCJul 12, 17:15 UTC43m
2026-07-12 SKW5020 - Jul 12, 13:55 UTCJul 12, 15:10 UTC1h 15m
2026-07-11 SKW5015 - Jul 11, 16:45 UTCJul 11, 18:00 UTC1h 15m
2026-07-11 SKW5910 LNK → ORD Jul 11, 12:35 UTCJul 11, 14:05 UTC1h 30m
2026-07-11 SKW5439 - Jul 11, 00:35 UTCJul 11, 01:50 UTC1h 15m
2026-07-10 SKW5436 - Jul 10, 22:50 UTCJul 10, 22:55 UTC5m
2026-07-10 SKW5436 - Jul 10, 22:15 UTCJul 10, 22:55 UTC40m
2026-07-10 SKW5436 FWA → ORD Jul 10, 22:01 UTCJul 10, 22:32 UTC31m
2026-07-10 SKW393H - Jul 10, 19:45 UTCJul 10, 20:10 UTC25m
2026-07-10 SKW393H ORD → FWA Jul 10, 19:58 UTCJul 10, 20:15 UTC17m
2026-07-10 SKW5106 - Jul 10, 14:45 UTCJul 10, 16:00 UTC1h 15m
2026-07-09 SKW730V - Jul 9, 23:35 UTCJul 10, 00:45 UTC1h 10m
2026-07-09 SKW5134 MGW → ORD Jul 9, 19:15 UTCJul 9, 20:25 UTC1h 10m
2026-07-09 SKW5134 MGW → ORD Jul 9, 19:18 UTCJul 9, 20:18 UTC1h 0m
2026-07-09 SKW5138 ORD → MGW Jul 9, 17:24 UTCJul 9, 18:10 UTC46m
2026-07-09 SKW5138 ORD → MGW Jul 9, 17:10 UTCJul 9, 18:25 UTC1h 15m
2026-07-09 SKW5402 - Jul 9, 14:00 UTCJul 9, 14:40 UTC40m
2026-07-09 SKW5581 ORD → MKE Jul 9, 11:30 UTCJul 9, 11:45 UTC15m
2026-07-09 SKW5581 ORD → MKE Jul 9, 11:29 UTCJul 9, 11:47 UTC18m
2026-07-09 SKW5173 - Jul 9, 00:50 UTCJul 9, 01:35 UTC45m
2026-07-08 SKW5173 - Jul 8, 23:45 UTCJul 8, 23:55 UTC10m
2026-07-08 SKW5173 MBS → PLN Jul 8, 23:47 UTCJul 9, 00:13 UTC26m
2026-07-08 SKW546J - Jul 8, 17:25 UTCJul 8, 18:35 UTC1h 10m
2026-07-08 SKW546J ORD → MBS Jul 8, 17:37 UTCJul 8, 18:35 UTC58m
2026-07-08 SKW5020 DEC → ORD Jul 8, 13:50 UTCJul 8, 15:15 UTC1h 25m
2026-07-07 SKW5015 - Jul 7, 17:00 UTCJul 7, 18:10 UTC1h 10m
2026-07-07 SKW5015 ORD → JLN Jul 7, 17:03 UTCJul 7, 18:09 UTC1h 6m
2026-07-07 SKW4670 - Jul 7, 12:10 UTCJul 7, 13:35 UTC1h 25m
2026-07-07 SKW4670 DLH → ORD Jul 7, 12:21 UTCJul 7, 13:13 UTC52m
2026-07-07 SKW359M - Jul 7, 03:40 UTCJul 7, 04:35 UTC55m
2026-07-07 SKW5064 DEC → ORD Jul 7, 01:30 UTCJul 7, 02:10 UTC40m
2026-07-07 SKW5064 DEC → ORD Jul 7, 01:37 UTCJul 7, 01:52 UTC15m
2026-07-07 SKW5064 DEC → ORD Jul 7, 00:30 UTCJul 7, 00:55 UTC25m
2026-07-06 SKW5981 - Jul 6, 21:50 UTCJul 6, 22:20 UTC30m
2026-07-06 SKW5981 FWA → ORD Jul 6, 21:31 UTCJul 6, 22:03 UTC32m
2026-07-04 SKW4645 ORD → FWA Jul 4, 17:51 UTCJul 4, 17:58 UTC7m
2026-07-04 SKW4645 - Jul 4, 17:30 UTCJul 4, 18:00 UTC30m
2026-07-04 SKW4670 - Jul 4, 15:10 UTCJul 4, 16:20 UTC1h 10m
2026-07-04 SKW6098 - Jul 4, 02:15 UTCJul 4, 03:40 UTC1h 25m
2026-07-04 SKW6098 DAY → DLH Jul 4, 01:19 UTCJul 4, 03:38 UTC2h 19m

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 4h ago.
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, SKW5113, SKW5023.