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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 3h ago
Flights observed
531
Distinct callsigns
20
Country
US
Last broadcast
3h ago

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 - 8 2026-07-09
SKW5061 - 6 2026-07-14
SKW5036 - 6 2026-06-20
SKW5947 - 5 2026-07-07
SKW5750 SkyWest Airlines 5 2026-04-28
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
SKW6061 SkyWest Airlines 4 2026-05-22
SKW583X - 4 2026-07-13
SKW576U SkyWest Airlines 4 2026-05-31
SKW5743 - 4 2026-07-05
SKW5346 SkyWest Airlines 4 2026-05-02
SKW5246 SkyWest Airlines 4 2026-06-08
SKW5245 - 4 2026-07-05
SKW5211 SkyWest Airlines 4 2026-06-14
SKW5137 SkyWest Airlines 4 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW5742 - Jul 14, 19:05 UTCJul 14, 19:15 UTC10m
2026-07-14 SKW5742 RAP → DEN Jul 14, 18:53 UTCJul 14, 19:34 UTC41m
2026-07-14 SKW4674 - Jul 14, 16:35 UTCJul 14, 17:00 UTC25m
2026-07-14 SKW5061 - Jul 14, 11:30 UTCJul 14, 11:55 UTC25m
2026-07-14 SKW339A - Jul 14, 02:50 UTCJul 14, 03:10 UTC20m
2026-07-14 SKW790J - Jul 14, 00:00 UTCJul 14, 01:30 UTC1h 30m
2026-07-13 SKW394P - Jul 13, 20:35 UTCJul 13, 21:25 UTC50m
2026-07-13 SKW376U - Jul 13, 18:20 UTCJul 13, 19:15 UTC55m
2026-07-13 SKW474E - Jul 13, 14:40 UTCJul 13, 15:55 UTC1h 15m
2026-07-13 SKW5063 CYS → DEN Jul 13, 11:50 UTCJul 13, 12:10 UTC20m
2026-07-13 SKW5063 CYS → DEN Jul 13, 12:02 UTCJul 13, 12:07 UTC5m
2026-07-13 SKW583X DEN → CYS Jul 13, 03:25 UTCJul 13, 03:50 UTC25m
2026-07-13 SKW5107 - Jul 13, 01:30 UTCJul 13, 01:55 UTC25m
2026-07-13 SKW5107 LBF → DEN Jul 13, 01:29 UTCJul 13, 02:02 UTC33m
2026-07-12 SKW5039 - Jul 12, 22:55 UTCJul 12, 23:20 UTC25m
2026-07-12 SKW6065 - Jul 12, 21:20 UTCJul 12, 22:00 UTC40m
2026-07-12 SKW6065 - Jul 12, 19:30 UTCJul 12, 20:05 UTC35m
2026-07-12 SKW4631 - Jul 12, 15:55 UTCJul 12, 16:35 UTC40m
2026-07-12 SKW4771 - Jul 12, 13:45 UTCJul 12, 14:30 UTC45m
2026-07-12 SKW4771 DEN → CPR Jul 12, 13:55 UTCJul 12, 14:24 UTC29m
2026-07-12 SKW5087 - Jul 12, 11:40 UTCJul 12, 12:25 UTC45m
2026-07-12 SKW546Y - Jul 12, 02:50 UTCJul 12, 03:25 UTC35m
2026-07-12 SKW5196 - Jul 12, 01:05 UTCJul 12, 01:40 UTC35m
2026-07-09 SKW5099 - Jul 9, 20:35 UTCJul 9, 21:20 UTC45m
2026-07-09 SKW5089 - Jul 9, 18:15 UTCJul 9, 19:00 UTC45m
2026-07-09 SKW5089 DEN → COD Jul 9, 18:16 UTCJul 9, 19:22 UTC1h 6m
2026-07-09 SKW5400 COS → DEN Jul 9, 16:43 UTCJul 9, 17:17 UTC34m
2026-07-09 SKW5400 COS → DEN Jul 9, 16:55 UTCJul 9, 17:20 UTC25m
2026-07-09 SKW5861 DEN → COS Jul 9, 01:05 UTCJul 9, 01:25 UTC20m
2026-07-08 SKW4657 COS → DEN Jul 8, 23:30 UTCJul 8, 23:55 UTC25m
2026-07-08 SKW4657 COS → DEN Jul 8, 23:28 UTCJul 8, 23:53 UTC25m
2026-07-08 SKW4775 DEN → COS Jul 8, 20:00 UTCJul 8, 20:20 UTC20m
2026-07-08 SKW4775 DEN → COS Jul 8, 19:50 UTCJul 8, 20:13 UTC23m
2026-07-08 SKW5829 - Jul 8, 11:30 UTCJul 8, 12:40 UTC1h 10m
2026-07-08 SKW5257 - Jul 8, 05:25 UTCJul 8, 05:35 UTC10m
2026-07-08 SKW5257 DEN → HDN Jul 8, 04:10 UTCJul 8, 04:35 UTC25m
2026-07-07 SKW5090 DEN → DEN Jul 7, 23:20 UTCJul 8, 03:05 UTC3h 45m
2026-07-07 SKW5033 - Jul 7, 20:55 UTCJul 7, 22:05 UTC1h 10m
2026-07-07 SKW5033 LBL → DEN Jul 7, 20:57 UTCJul 7, 22:06 UTC1h 9m
2026-07-07 SKW5046 - Jul 7, 18:25 UTCJul 7, 19:00 UTC35m
2026-07-07 SKW5400 - Jul 7, 17:00 UTCJul 7, 17:15 UTC15m
2026-07-07 SKW5400 COS → DEN Jul 7, 17:05 UTCJul 7, 17:23 UTC18m
2026-07-07 SKW6095 DEN → COS Jul 7, 15:45 UTCJul 7, 16:10 UTC25m
2026-07-07 SKW4696 COS → DEN Jul 7, 13:29 UTCJul 7, 13:42 UTC13m
2026-07-07 SKW4696 COS → DEN Jul 7, 13:10 UTCJul 7, 13:35 UTC25m
2026-07-07 SKMX939 DEN → COS Jul 7, 05:35 UTCJul 7, 05:55 UTC20m
2026-07-07 SKW5947 - Jul 7, 00:20 UTCJul 7, 01:10 UTC50m
2026-07-06 SKW5947 RAP → DEN Jul 6, 23:29 UTCJul 7, 01:06 UTC1h 37m
2026-07-06 SKW5891 FAR → ORD Jul 6, 21:10 UTCJul 6, 21:45 UTC35m
2026-07-06 SKW5102 - Jul 6, 17:00 UTCJul 6, 18:30 UTC1h 30m

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 3h ago.
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, SKW5061, SKW5036, SKW5947, SKW5750.