Apparatus

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sensors Mode-S transponder

AD08BD

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N939SW · BOMBARDIER Regional Jet CRJ-200 · operated by SKYWEST AIRLINES INC

Hex
AD08BD
Octal
53204275
Decimal
11,339,965
Country
US
Tail
N939SW
Type
CRJ2
No current signal · last broadcast Jul 26, 19:20 UTC
Flights observed
602
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 19:20 UTC

Last known position

Most recent position reported by Mode-S AD08BD.

Country allocation

The ICAO 24-bit address AD08BD 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
SKW5400 SkyWest Airlines 11 2026-07-22
SKW4797 - 7 2026-07-18
SKW5246 SkyWest Airlines 6 2026-07-25
SKW5089 - 6 2026-07-17
SKW5061 - 6 2026-07-14
SKW5036 - 6 2026-06-20
SKW6061 - 5 2026-07-18
SKW5947 - 5 2026-07-07
SKW5750 SkyWest Airlines 5 2026-04-28
SKW5743 - 5 2026-07-16
SKW5634 SkyWest Airlines 5 2026-07-25
SKW5245 - 5 2026-07-16
SKW5102 - 5 2026-07-20
SKW5079 - 5 2026-06-21
SKW5077 SkyWest Airlines 5 2026-05-24
SKW5057 - 5 2026-06-16
SKW5046 - 5 2026-07-07
SKW5027 - 5 2026-06-20
SKW6067 SkyWest Airlines 4 2026-06-01
SKW5861 - 4 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6062 LAR → DEN Jul 26, 18:15 UTCJul 26, 19:20 UTC1h 5m
2026-07-26 SKW5096 DIK → DEN Jul 26, 15:15 UTCJul 26, 16:05 UTC50m
2026-07-25 SKW767H DEN → DIK Jul 25, 23:05 UTCJul 25, 23:30 UTC25m
2026-07-25 SKW5033 EAU → ORD Jul 25, 20:50 UTCJul 25, 21:25 UTC35m
2026-07-25 SKW5033 EAU → ORD Jul 25, 20:57 UTCJul 25, 21:19 UTC22m
2026-07-25 SKW5634 MDT → ORD Jul 25, 16:24 UTCJul 25, 16:26 UTC2m
2026-07-25 SKW5634 MDT → ORD Jul 25, 15:50 UTCJul 25, 16:05 UTC15m
2026-07-25 SKW5246 RDD → SFO Jul 25, 14:14 UTCJul 25, 14:20 UTC6m
2026-07-25 SKW5246 RDD → SFO Jul 25, 14:05 UTCJul 25, 14:20 UTC15m
2026-07-25 SKW5093 - Jul 25, 12:25 UTCJul 25, 12:55 UTC30m
2026-07-25 SKW5051 ORD → LAF Jul 25, 03:30 UTCJul 25, 03:45 UTC15m
2026-07-25 SKW5051 ORD → LAF Jul 25, 03:30 UTCJul 25, 04:06 UTC36m
2026-07-24 SKW790J PRC → DEN Jul 24, 23:45 UTCJul 25, 01:10 UTC1h 25m
2026-07-24 SKW394P LAX → PRC Jul 24, 20:40 UTCJul 24, 21:35 UTC55m
2026-07-24 SKW376U PRC → LAX Jul 24, 18:20 UTCJul 24, 19:10 UTC50m
2026-07-24 SKW474E DEN → PRC Jul 24, 14:45 UTCJul 24, 16:00 UTC1h 15m
2026-07-24 SKW5085 EAR → DEN Jul 24, 11:35 UTCJul 24, 12:00 UTC25m
2026-07-24 SKW359C DEN → LAR Jul 24, 04:20 UTCJul 24, 04:40 UTC20m
2026-07-24 SKW5131 ORD → FOD Jul 24, 01:15 UTCJul 24, 03:05 UTC1h 50m
2026-07-23 SKW344H DEN → SUX Jul 23, 20:35 UTCJul 23, 21:45 UTC1h 10m
2026-07-23 SKW5463 RNO → SFO Jul 23, 16:50 UTCJul 23, 18:05 UTC1h 15m
2026-07-23 SKW4762 - Jul 23, 14:25 UTCJul 23, 15:30 UTC1h 5m
2026-07-23 SKW5513 SFO → MFR Jul 23, 11:20 UTCJul 23, 12:05 UTC45m
2026-07-23 SKW6089 FWA → FAR Jul 23, 03:10 UTCJul 23, 04:05 UTC55m
2026-07-22 SKW5224 DEN → DRO Jul 22, 19:55 UTCJul 22, 20:45 UTC50m
2026-07-22 SKW5400 ORD → GRR Jul 22, 16:36 UTCJul 22, 16:44 UTC8m
2026-07-22 SKW5400 ORD → GRR Jul 22, 16:30 UTCJul 22, 16:55 UTC25m
2026-07-22 SKW4744 ONT → SFO Jul 22, 03:05 UTCJul 22, 03:20 UTC15m
2026-07-21 SKW4743 ICT → ORD Jul 21, 23:30 UTCJul 22, 00:15 UTC45m
2026-07-21 SKW4743 ICT → ORD Jul 21, 22:56 UTCJul 22, 00:07 UTC1h 11m
2026-07-21 SKW5233 SFO → BUR Jul 21, 20:40 UTCJul 21, 21:15 UTC35m
2026-07-21 SKW6078 COD → DEN Jul 21, 17:05 UTCJul 21, 18:06 UTC1h 1m
2026-07-21 SKW6078 - Jul 21, 14:15 UTCJul 21, 18:20 UTC4h 5m
2026-07-21 SKW5093 - Jul 21, 11:30 UTCJul 21, 12:00 UTC30m
2026-07-21 SKW5051 ORD → LAF Jul 21, 03:40 UTCJul 21, 04:10 UTC30m
2026-07-21 SKW5620 CPR → DEN Jul 21, 01:21 UTCJul 21, 01:37 UTC16m
2026-07-21 SKW5620 - Jul 21, 01:00 UTCJul 21, 01:45 UTC45m
2026-07-20 SKW5294 DEN → CPR Jul 20, 23:30 UTCJul 21, 00:10 UTC39m
2026-07-20 SKW4657 SJC → DEN Jul 20, 22:08 UTCJul 20, 22:21 UTC13m
2026-07-20 SKW4657 SJC → DEN Jul 20, 21:50 UTCJul 20, 22:30 UTC40m
2026-07-20 SKW4775 DEN → COS Jul 20, 19:45 UTCJul 20, 20:00 UTC15m
2026-07-20 SKW4775 DEN → COS Jul 20, 19:50 UTCJul 20, 19:58 UTC8m
2026-07-20 SKW5102 - Jul 20, 16:50 UTCJul 20, 18:15 UTC1h 25m
2026-07-20 SKW542U DEN → DVL Jul 20, 14:05 UTCJul 20, 15:20 UTC1h 15m
2026-07-19 SKW5028 SUX → ORD Jul 19, 15:50 UTCJul 19, 17:35 UTC1h 45m
2026-07-19 SKW645V DEN → YQR Jul 19, 01:45 UTCJul 19, 02:35 UTC50m
2026-07-18 SKW4797 - Jul 18, 22:15 UTCJul 18, 22:55 UTC40m
2026-07-18 SKW4797 DEN → CPR Jul 18, 19:45 UTCJul 18, 20:25 UTC40m
2026-07-18 SKW4797 DEN → CPR Jul 18, 19:45 UTCJul 18, 20:25 UTC40m
2026-07-18 SKW5101 - Jul 18, 16:40 UTCJul 18, 18:00 UTC1h 20m

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 N939SW page for operator, model, and routing details .

Mode-S AD08BD frequently asked

What is Mode-S code AD08BD?
AD08BD is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N939SW.
Where is Mode-S AD08BD registered?
Mode-S code AD08BD 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 AD08BD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AD08BD, octal 53204275, decimal 11,339,965.
What flights does AD08BD operate?
Mode-S AD08BD has broadcast 20 distinct callsigns, including SKW5400, SKW4797, SKW5246, SKW5089, SKW5061.