Apparatus

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sensors Mode-S transponder

AB3275

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N820SK · BOMBARDIER Regional Jet CRJ-900 · operated by SKYWEST AIRLINES INC

Hex
AB3275
Octal
52631165
Decimal
11,219,573
Country
US
Tail
N820SK
Type
CRJ9
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
800
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S AB3275.

Country allocation

The ICAO 24-bit address AB3275 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
SKW4059 SkyWest Airlines 22 2026-07-18
SKW3941 SkyWest Airlines 21 2026-07-24
SKW3752 SkyWest Airlines 20 2026-07-26
SKW3675 SkyWest Airlines 20 2026-07-25
SKW3898 SkyWest Airlines 19 2026-07-17
SKW4034 - 15 2026-06-25
SKW3826 SkyWest Airlines 15 2026-07-26
SKW3500 - 15 2026-07-16
SKW3784 SkyWest Airlines 14 2026-06-02
SKW3586 SkyWest Airlines 14 2026-07-22
SKW4440 - 13 2026-07-20
SKW4166 - 13 2026-06-26
SKW3976 - 13 2026-07-04
SKW3671 SkyWest Airlines 12 2026-07-26
SKW3558 - 12 2026-07-18
SKW3969 SkyWest Airlines 11 2026-05-30
SKW3961 SkyWest Airlines 11 2026-07-23
SKW3860 SkyWest Airlines 11 2026-07-25
SKW4123 - 10 2026-06-19
SKW4110 - 10 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3919 MDW → MSP Jul 26, 20:35 UTCJul 26, 21:00 UTC25m
2026-07-26 SKW3752 AUS → CVG Jul 26, 18:50 UTCJul 26, 19:15 UTC25m
2026-07-26 SKW3752 AUS → CVG Jul 26, 16:50 UTCJul 26, 17:05 UTC15m
2026-07-26 SKW3671 MDW → DTW Jul 26, 14:40 UTCJul 26, 15:30 UTC50m
2026-07-26 SKW3671 MDW → DTW Jul 26, 14:39 UTCJul 26, 15:25 UTC46m
2026-07-26 SKW3671 MDW → DTW Jul 26, 12:45 UTCJul 26, 13:40 UTC55m
2026-07-26 SKW3826 MSP → SDF Jul 26, 10:05 UTCJul 26, 11:05 UTC1h 0m
2026-07-26 SKW3988 DTW → AZO Jul 26, 01:45 UTCJul 26, 02:45 UTC1h 0m
2026-07-25 SKW3860 ATL → SBN Jul 25, 22:40 UTCJul 25, 23:30 UTC50m
2026-07-25 SKW3860 ATL → SBN Jul 25, 22:38 UTCJul 25, 23:29 UTC51m
2026-07-25 SKW3860 ATL → SBN Jul 25, 21:00 UTCJul 25, 21:45 UTC45m
2026-07-25 SKW3831 MSP → OMA Jul 25, 18:20 UTCJul 25, 19:50 UTC1h 30m
2026-07-25 SKW3831 MSP → OMA Jul 25, 15:55 UTCJul 25, 17:20 UTC1h 25m
2026-07-25 SKW3710 SDF → DTW Jul 25, 14:20 UTCJul 25, 14:45 UTC25m
2026-07-25 SKW3710 SDF → DTW Jul 25, 14:20 UTCJul 25, 14:37 UTC17m
2026-07-25 SKW3710 SDF → DTW Jul 25, 12:50 UTCJul 25, 13:10 UTC20m
2026-07-25 SKW3826 MSP → SDF Jul 25, 10:15 UTCJul 25, 11:25 UTC1h 10m
2026-07-25 SKW3988 DTW → AZO Jul 25, 03:35 UTCJul 25, 04:35 UTC1h 0m
2026-07-25 SKW3675 SJC → LAS Jul 25, 01:45 UTCJul 25, 02:25 UTC40m
2026-07-25 SKW3675 SJC → LAS Jul 25, 00:25 UTCJul 25, 01:05 UTC40m
2026-07-24 SKW3941 SMF → LAS Jul 24, 23:00 UTCJul 24, 23:20 UTC20m
2026-07-24 SKW3941 SMF → LAS Jul 24, 21:20 UTCJul 24, 21:45 UTC25m
2026-07-24 SKW3752 AUS → CVG Jul 24, 18:25 UTCJul 24, 18:50 UTC25m
2026-07-24 SKW3752 AUS → CVG Jul 24, 16:50 UTCJul 24, 17:10 UTC20m
2026-07-24 SKW3671 MDW → DTW Jul 24, 14:45 UTCJul 24, 15:35 UTC50m
2026-07-24 SKW3671 MDW → DTW Jul 24, 14:39 UTCJul 24, 15:31 UTC52m
2026-07-24 SKW3671 MDW → DTW Jul 24, 12:35 UTCJul 24, 13:25 UTC50m
2026-07-24 SKW3826 MSP → SDF Jul 24, 10:10 UTCJul 24, 11:15 UTC1h 5m
2026-07-24 SKW3988 DTW → AZO Jul 24, 02:55 UTCJul 24, 03:50 UTC55m
2026-07-23 SKW4007 PIT → JFK Jul 23, 23:40 UTCJul 24, 01:05 UTC1h 25m
2026-07-23 SKW4007 PIT → JFK Jul 23, 21:10 UTCJul 23, 22:30 UTC1h 20m
2026-07-23 SKW3961 BOS → MKE Jul 23, 18:20 UTCJul 23, 19:50 UTC1h 30m
2026-07-23 SKW3961 BOS → MKE Jul 23, 15:35 UTCJul 23, 16:50 UTC1h 15m
2026-07-23 SKW3837 SBN → DTW Jul 23, 12:55 UTCJul 23, 13:20 UTC25m
2026-07-23 SKW167P - Jul 23, 11:05 UTCJul 23, 11:30 UTC25m
2026-07-22 SKW3586 SEA → SFO Jul 22, 23:00 UTCJul 22, 23:15 UTC15m
2026-07-22 SKW3586 SEA → SFO Jul 22, 21:40 UTCJul 22, 21:55 UTC15m
2026-07-22 SKW3941 SMF → LAS Jul 22, 20:00 UTCJul 22, 20:30 UTC30m
2026-07-22 SKW3941 SMF → LAS Jul 22, 18:25 UTCJul 22, 18:50 UTC25m
2026-07-22 SKW3685 LAX → PHX Jul 22, 15:25 UTCJul 22, 16:55 UTC1h 30m
2026-07-22 SKW3685 LAX → PHX Jul 22, 12:45 UTCJul 22, 14:10 UTC1h 25m
2026-07-22 SKW3962 - Jul 22, 11:10 UTCJul 22, 11:40 UTC30m
2026-07-22 SKW3962 MBS → DTW Jul 22, 11:10 UTCJul 22, 11:29 UTC19m
2026-07-22 SKW4173 MSN → MSP Jul 22, 04:00 UTCJul 22, 04:25 UTC25m
2026-07-22 SKW3598 - Jul 22, 00:20 UTCJul 22, 00:55 UTC35m
2026-07-22 SKW3598 PIT → DTW Jul 22, 00:17 UTCJul 22, 00:54 UTC37m
2026-07-21 SKW3598 - Jul 21, 22:25 UTCJul 21, 23:00 UTC35m
2026-07-21 SKW3762 - Jul 21, 19:20 UTCJul 21, 20:45 UTC1h 25m
2026-07-21 SKW3762 - Jul 21, 16:40 UTCJul 21, 18:20 UTC1h 40m
2026-07-21 SKW3697 AZO → DTW Jul 21, 13:50 UTCJul 21, 15:10 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 N820SK page for operator, model, and routing details .

Mode-S AB3275 frequently asked

What is Mode-S code AB3275?
AB3275 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N820SK.
Where is Mode-S AB3275 registered?
Mode-S code AB3275 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 AB3275 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB3275, octal 52631165, decimal 11,219,573.
What flights does AB3275 operate?
Mode-S AB3275 has broadcast 20 distinct callsigns, including SKW4059, SKW3941, SKW3752, SKW3675, SKW3898.