Apparatus

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sensors Mode-S transponder

AB7B63

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N839SK · BOMBARDIER Regional Jet CRJ-900 · operated by BANK OF UTAH TRUSTEE

Hex
AB7B63
Octal
52675543
Decimal
11,238,243
Country
US
Tail
N839SK
Type
CRJ9
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
782
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S AB7B63.

Country allocation

The ICAO 24-bit address AB7B63 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 - 21 2026-07-12
SKW3961 - 21 2026-07-05
SKW3675 SkyWest Airlines 17 2026-07-21
SKW4440 SkyWest Airlines 16 2026-07-23
SKW3941 SkyWest Airlines 16 2026-07-21
SKW3879 SkyWest Airlines 15 2026-07-26
SKW3986 SkyWest Airlines 14 2026-07-25
SKW3919 - 14 2026-07-13
SKW3889 SkyWest Airlines 13 2026-07-25
SKW3821 - 13 2026-07-18
SKW3810 SkyWest Airlines 13 2026-06-01
SKW3784 SkyWest Airlines 13 2026-05-29
SKW3752 - 13 2026-07-07
SKW3559 - 13 2026-07-18
SKW3860 - 12 2026-07-19
SKW3837 SkyWest Airlines 12 2026-07-25
SKW3671 - 12 2026-07-17
SKW3558 SkyWest Airlines 12 2026-07-23
SKW4166 - 11 2026-07-08
SKW4034 SkyWest Airlines 11 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3651 YYZ → LGA Jul 26, 20:25 UTCJul 26, 21:55 UTC1h 30m
2026-07-26 SKW3879 SLC → OAK Jul 26, 18:30 UTCJul 26, 19:10 UTC40m
2026-07-26 SKW3879 SLC → OAK Jul 26, 18:30 UTCJul 26, 19:10 UTC40m
2026-07-26 SKW3879 SLC → OAK Jul 26, 16:45 UTCJul 26, 17:25 UTC40m
2026-07-26 SKW3697 AZO → DTW Jul 26, 13:45 UTCJul 26, 14:55 UTC1h 10m
2026-07-26 SKW3697 AZO → DTW Jul 26, 11:45 UTCJul 26, 12:50 UTC1h 5m
2026-07-26 SKW3980 AZO → DTW Jul 26, 09:40 UTCJul 26, 10:05 UTC25m
2026-07-26 SKW3980 AZO → DTW Jul 26, 09:43 UTCJul 26, 10:04 UTC21m
2026-07-26 SKW3909 LAX → OAK Jul 26, 01:50 UTCJul 26, 02:15 UTC25m
2026-07-25 SKW3889 MSP → MSN Jul 25, 23:00 UTCJul 26, 00:25 UTC1h 25m
2026-07-25 SKW3889 MSP → MSN Jul 25, 20:25 UTCJul 25, 21:55 UTC1h 30m
2026-07-25 SKW3986 DTW → AZO Jul 25, 18:50 UTCJul 25, 19:15 UTC25m
2026-07-25 SKW3986 DTW → AZO Jul 25, 18:49 UTCJul 25, 19:14 UTC25m
2026-07-25 SKW3986 DTW → AZO Jul 25, 17:30 UTCJul 25, 18:00 UTC30m
2026-07-25 SKW3898 IAD → MSP Jul 25, 16:05 UTCJul 25, 16:30 UTC25m
2026-07-25 SKW3898 IAD → MSP Jul 25, 14:30 UTCJul 25, 14:55 UTC25m
2026-07-25 SKW3837 SBN → DTW Jul 25, 12:45 UTCJul 25, 13:15 UTC30m
2026-07-25 SKW3837 SBN → DTW Jul 25, 12:35 UTCJul 25, 13:14 UTC39m
2026-07-25 SKW3900 SJC → SEA Jul 25, 00:00 UTCJul 25, 00:30 UTC30m
2026-07-24 SKW3785 MSP → FSD Jul 24, 21:20 UTCJul 24, 22:30 UTC1h 10m
2026-07-24 SKW3785 MSP → FSD Jul 24, 19:15 UTCJul 24, 20:15 UTC1h 0m
2026-07-24 SKW3673 ABQ → SLC Jul 24, 17:00 UTCJul 24, 17:45 UTC45m
2026-07-24 SKW3673 ABQ → SLC Jul 24, 14:35 UTCJul 24, 15:20 UTC45m
2026-07-24 SKW3984 JFK → CMH Jul 24, 12:00 UTCJul 24, 12:45 UTC45m
2026-07-24 SKW3850 BOI → SLC Jul 24, 00:35 UTCJul 24, 01:25 UTC50m
2026-07-23 SKW3558 MSP → MSN Jul 23, 21:05 UTCJul 23, 22:20 UTC1h 15m
2026-07-23 SKW3558 MSP → MSN Jul 23, 18:40 UTCJul 23, 19:55 UTC1h 15m
2026-07-23 SKW4440 LAX → OAK Jul 23, 16:35 UTCJul 23, 17:25 UTC50m
2026-07-23 SKW4440 LAX → OAK Jul 23, 14:15 UTCJul 23, 15:05 UTC50m
2026-07-23 SKW4176 MSP → MOT Jul 23, 12:15 UTCJul 23, 13:05 UTC50m
2026-07-23 SKW4159 DTW → ATW Jul 23, 01:30 UTCJul 23, 02:20 UTC50m
2026-07-22 SKW3651 YYZ → LGA Jul 22, 22:25 UTCJul 23, 00:05 UTC1h 40m
2026-07-22 SKW3651 YYZ → LGA Jul 22, 19:45 UTCJul 22, 21:25 UTC1h 40m
2026-07-22 SKW4065 SEA → PDX Jul 22, 17:10 UTCJul 22, 18:15 UTC1h 5m
2026-07-22 SKW4065 SEA → PDX Jul 22, 15:00 UTCJul 22, 16:00 UTC1h 0m
2026-07-22 SKW4065 SEA → PDX Jul 22, 15:06 UTCJul 22, 15:46 UTC40m
2026-07-22 SKW3639 FWA → MSP Jul 22, 13:10 UTCJul 22, 14:00 UTC50m
2026-07-22 SKW3639 FWA → MSP Jul 22, 11:40 UTCJul 22, 12:20 UTC40m
2026-07-22 SKW4040 ATL → HPN Jul 22, 04:15 UTCJul 22, 05:25 UTC1h 10m
2026-07-22 SKW3795 MSP → OKC Jul 22, 01:50 UTCJul 22, 03:25 UTC1h 35m
2026-07-21 SKW3675 SJC → LAS Jul 21, 23:50 UTCJul 22, 00:30 UTC40m
2026-07-21 SKW3675 SJC → LAS Jul 21, 22:00 UTCJul 21, 22:50 UTC50m
2026-07-21 SKW3941 SMF → LAS Jul 21, 20:00 UTCJul 21, 20:20 UTC20m
2026-07-21 SKW3941 SMF → LAS Jul 21, 18:30 UTCJul 21, 19:00 UTC30m
2026-07-21 SKW3685 LAX → PHX Jul 21, 15:30 UTCJul 21, 17:10 UTC1h 40m
2026-07-21 SKW3685 LAX → PHX Jul 21, 12:50 UTCJul 21, 14:20 UTC1h 30m
2026-07-21 SKW3826 MSP → SDF Jul 21, 10:20 UTCJul 21, 11:35 UTC1h 15m
2026-07-21 SKW3988 DTW → AZO Jul 21, 01:55 UTCJul 21, 02:55 UTC1h 0m
2026-07-20 SKW3782 SMF → LAX Jul 20, 22:55 UTCJul 20, 23:40 UTC45m
2026-07-20 SKW3782 SMF → LAX Jul 20, 21:25 UTCJul 20, 22:00 UTC35m

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 N839SK page for operator, model, and routing details .

Mode-S AB7B63 frequently asked

What is Mode-S code AB7B63?
AB7B63 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N839SK.
Where is Mode-S AB7B63 registered?
Mode-S code AB7B63 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 AB7B63 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AB7B63, octal 52675543, decimal 11,238,243.
What flights does AB7B63 operate?
Mode-S AB7B63 has broadcast 20 distinct callsigns, including SKW4059, SKW3961, SKW3675, SKW4440, SKW3941.