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 2h ago
Flights observed
699
Distinct callsigns
20
Country
US
Last broadcast
2h ago

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 - 19 2026-06-26
SKW3898 - 17 2026-07-09
SKW3675 SkyWest Airlines 16 2026-06-08
SKW4034 - 15 2026-06-25
SKW3941 - 14 2026-06-26
SKW3784 SkyWest Airlines 14 2026-06-02
SKW3752 - 14 2026-07-03
SKW4166 - 13 2026-06-26
SKW3976 - 13 2026-07-04
SKW3500 - 13 2026-07-08
SKW3826 SkyWest Airlines 12 2026-05-21
SKW3969 SkyWest Airlines 11 2026-05-30
SKW4440 - 10 2026-07-12
SKW4123 - 10 2026-06-19
SKW3889 - 10 2026-06-29
SKW3782 SkyWest Airlines 10 2026-06-25
SKW4110 - 9 2026-07-09
SKW4013 - 9 2026-07-14
SKW3961 - 9 2026-06-28
SKW3807 SkyWest Airlines 9 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW3979 - Jul 14, 19:25 UTCJul 14, 19:55 UTC30m
2026-07-14 SKW3979 - Jul 14, 17:45 UTCJul 14, 18:10 UTC25m
2026-07-14 SKW3986 - Jul 14, 15:45 UTCJul 14, 16:10 UTC25m
2026-07-14 SKW3986 - Jul 14, 14:25 UTCJul 14, 14:45 UTC20m
2026-07-14 SKW3977 - Jul 14, 11:45 UTCJul 14, 12:35 UTC50m
2026-07-14 SKW4013 - Jul 14, 00:40 UTCJul 14, 01:25 UTC45m
2026-07-14 SKW4013 DTW → LEX Jul 14, 00:54 UTCJul 14, 01:18 UTC24m
2026-07-13 SKW3586 - Jul 13, 22:55 UTCJul 13, 23:15 UTC20m
2026-07-13 SKW3586 - Jul 13, 21:30 UTCJul 13, 21:45 UTC15m
2026-07-13 SKW3979 - Jul 13, 19:20 UTCJul 13, 19:50 UTC30m
2026-07-13 SKW3979 - Jul 13, 17:40 UTCJul 13, 18:05 UTC25m
2026-07-13 SKW3986 - Jul 13, 15:50 UTCJul 13, 16:20 UTC30m
2026-07-13 SKW3986 - Jul 13, 14:15 UTCJul 13, 14:40 UTC25m
2026-07-13 SKW3977 - Jul 13, 11:45 UTCJul 13, 12:35 UTC50m
2026-07-13 SKW4013 - Jul 13, 00:15 UTCJul 13, 01:01 UTC45m
2026-07-12 SKW3558 - Jul 12, 21:35 UTCJul 12, 23:00 UTC1h 25m
2026-07-12 SKW3558 - Jul 12, 18:45 UTCJul 12, 20:10 UTC1h 25m
2026-07-12 SKW4440 - Jul 12, 16:20 UTCJul 12, 17:05 UTC45m
2026-07-12 SKW4440 - Jul 12, 14:10 UTCJul 12, 15:01 UTC50m
2026-07-12 SKW3984 - Jul 12, 12:01 UTCJul 12, 12:45 UTC45m
2026-07-12 SKW3850 - Jul 12, 00:15 UTCJul 12, 01:00 UTC45m
2026-07-11 SKW3787 IAD → DTW Jul 11, 21:30 UTCJul 11, 22:30 UTC1h 0m
2026-07-11 SKW3787 IAD → DTW Jul 11, 21:31 UTCJul 11, 22:27 UTC56m
2026-07-11 SKW3787 - Jul 11, 19:25 UTCJul 11, 20:20 UTC55m
2026-07-11 SKW3711 IAD → DTW Jul 11, 16:45 UTCJul 11, 17:40 UTC55m
2026-07-11 SKW3711 - Jul 11, 14:40 UTCJul 11, 15:35 UTC55m
2026-07-11 SKW3837 - Jul 11, 12:40 UTCJul 11, 13:05 UTC25m
2026-07-11 SKW3837 SBN → DTW Jul 11, 12:42 UTCJul 11, 13:05 UTC23m
2026-07-11 SKW3900 - Jul 11, 00:45 UTCJul 11, 01:15 UTC30m
2026-07-10 SKW3785 - Jul 10, 21:25 UTCJul 10, 22:40 UTC1h 15m
2026-07-10 SKW3785 - Jul 10, 19:15 UTCJul 10, 20:20 UTC1h 5m
2026-07-10 SKW3673 - Jul 10, 16:40 UTCJul 10, 17:30 UTC50m
2026-07-10 SKW3673 - Jul 10, 14:35 UTCJul 10, 15:20 UTC45m
2026-07-10 SKW3977 - Jul 10, 11:45 UTCJul 10, 12:35 UTC50m
2026-07-10 SKW3977 LEX → DTW Jul 10, 11:50 UTCJul 10, 12:34 UTC44m
2026-07-10 SKW4013 - Jul 10, 02:05 UTCJul 10, 02:55 UTC50m
2026-07-09 SKW3586 - Jul 9, 22:30 UTCJul 9, 22:50 UTC20m
2026-07-09 SKW3586 - Jul 9, 21:10 UTCJul 9, 21:25 UTC15m
2026-07-09 SKW3979 - Jul 9, 19:25 UTCJul 9, 19:55 UTC30m
2026-07-09 SKW3979 AZO → DTW Jul 9, 19:16 UTCJul 9, 19:50 UTC34m
2026-07-09 SKW3979 - Jul 9, 17:45 UTCJul 9, 18:10 UTC25m
2026-07-09 SKW3898 - Jul 9, 15:55 UTCJul 9, 16:15 UTC20m
2026-07-09 SKW3898 - Jul 9, 14:35 UTCJul 9, 15:05 UTC30m
2026-07-09 SKW4110 - Jul 9, 11:35 UTCJul 9, 13:00 UTC1h 25m
2026-07-09 SKW3715 - Jul 9, 00:15 UTCJul 9, 01:45 UTC1h 30m
2026-07-08 SKW3919 - Jul 8, 22:35 UTCJul 8, 23:05 UTC30m
2026-07-08 SKW3919 - Jul 8, 21:15 UTCJul 8, 21:40 UTC25m
2026-07-08 SKW3879 - Jul 8, 18:20 UTCJul 8, 19:05 UTC45m
2026-07-08 SKW3879 DTW → IND Jul 8, 16:25 UTCJul 8, 17:05 UTC40m
2026-07-08 SKW3500 - Jul 8, 14:50 UTCJul 8, 15:20 UTC30m

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 2h ago.
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, SKW3898, SKW3675, SKW4034, SKW3941.