Apparatus

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sensors Mode-S transponder

AAF9C1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N806SK · BOMBARDIER Regional Jet CRJ-900 · operated by SKYWEST AIRLINES INC

Hex
AAF9C1
Octal
52574701
Decimal
11,205,057
Country
US
Tail
N806SK
Type
CRJ9
Broadcasting now · callsign SKW3639 · 7,750 ft
Flights observed
675
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Current position

AAF9C1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address AAF9C1 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
SKW3831 - 15 2026-07-13
SKW3538 SkyWest Airlines 14 2026-07-05
SKW4130 SkyWest Airlines 13 2026-07-23
SKW4103 SkyWest Airlines 13 2026-06-30
SKW4032 SkyWest Airlines 13 2026-07-25
SKW3702 SkyWest Airlines 13 2026-07-26
SKW3835 - 12 2026-07-09
SKW3971 - 10 2026-07-04
SKW3967 SkyWest Airlines 10 2026-06-28
SKW3941 SkyWest Airlines 10 2026-05-07
SKW3920 - 10 2026-07-02
SKW3886 - 10 2026-07-09
SKW4144 - 9 2026-07-06
SKW4102 SkyWest Airlines 8 2026-07-24
SKW4079 SkyWest Airlines 8 2026-06-03
SKW4066 SkyWest Airlines 8 2026-07-26
SKW4040 SkyWest Airlines 8 2026-07-22
SKW4024 - 8 2026-07-06
SKW3990 SkyWest Airlines 8 2026-05-28
SKW3783 SkyWest Airlines 8 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4167 MSP → RST Jul 26, 21:10 UTCJul 26, 22:15 UTC1h 5m
2026-07-26 SKW4167 MSP → RST Jul 26, 18:55 UTCJul 26, 20:00 UTC1h 5m
2026-07-26 SKW4066 MSP → BIS Jul 26, 16:50 UTCJul 26, 17:35 UTC45m
2026-07-26 SKW4066 MSP → BIS Jul 26, 14:20 UTCJul 26, 15:20 UTC1h 0m
2026-07-26 SKW3702 OMA → LGA Jul 26, 11:15 UTCJul 26, 12:30 UTC1h 15m
2026-07-26 SKW3780 CLT → DTW Jul 26, 01:10 UTCJul 26, 02:05 UTC55m
2026-07-25 SKW4032 HPN → ATL Jul 25, 19:45 UTCJul 25, 20:30 UTC45m
2026-07-25 SKW4032 HPN → ATL Jul 25, 19:50 UTCJul 25, 20:22 UTC32m
2026-07-25 SKW4032 HPN → ATL Jul 25, 18:15 UTCJul 25, 18:55 UTC40m
2026-07-25 SKW3927 BTV → DTW Jul 25, 13:20 UTCJul 25, 14:20 UTC1h 0m
2026-07-25 SKW3714 SLC → LGB Jul 25, 03:20 UTCJul 25, 04:25 UTC1h 5m
2026-07-24 SKW3783 MSP → FWA Jul 24, 23:07 UTCJul 25, 01:45 UTC2h 38m
2026-07-24 SKW3783 MSP → FWA Jul 24, 23:30 UTCJul 25, 01:50 UTC2h 20m
2026-07-24 SKW3783 MSP → FWA Jul 24, 19:50 UTCJul 24, 21:40 UTC1h 50m
2026-07-24 SKW4102 MKE → LGA Jul 24, 17:15 UTCJul 24, 18:05 UTC50m
2026-07-24 SKW4102 MKE → LGA Jul 24, 15:35 UTCJul 24, 16:10 UTC35m
2026-07-24 SKW4140 DTW → YYZ Jul 24, 11:27 UTCJul 24, 12:03 UTC36m
2026-07-24 SKW4003 DTW → BTV Jul 24, 01:40 UTCJul 24, 02:20 UTC40m
2026-07-23 SKW4130 PDX → SEA Jul 23, 23:05 UTCJul 23, 23:55 UTC50m
2026-07-23 SKW4130 PDX → SEA Jul 23, 20:15 UTCJul 23, 21:15 UTC1h 0m
2026-07-23 SKW3995 IND → DTW Jul 23, 18:10 UTCJul 23, 19:10 UTC1h 0m
2026-07-23 SKW3995 IND → DTW Jul 23, 16:00 UTCJul 23, 16:55 UTC55m
2026-07-23 SKW4460 MKE → MSP Jul 23, 11:40 UTCJul 23, 12:35 UTC55m
2026-07-23 SKW3724 STL → LGA Jul 23, 00:55 UTCJul 23, 01:40 UTC45m
2026-07-22 SKW4040 ATL → HPN Jul 22, 22:20 UTCJul 22, 23:55 UTC1h 35m
2026-07-22 SKW4040 ATL → HPN Jul 22, 20:00 UTCJul 22, 21:20 UTC1h 20m
2026-07-22 SKW3817 MOT → MSP Jul 22, 18:40 UTCJul 22, 19:05 UTC25m
2026-07-22 SKW135R GJT → ATL Jul 22, 17:05 UTCJul 22, 17:25 UTC20m
2026-07-22 SKW3626 MDW → MSP Jul 22, 14:15 UTCJul 22, 15:50 UTC1h 35m
2026-07-22 SKW130F AUS → MAF Jul 22, 12:35 UTCJul 22, 12:50 UTC15m
2026-07-22 SKW130F AUS → MAF Jul 22, 12:31 UTCJul 22, 12:50 UTC19m
2026-07-21 SKW4040 ATL → HPN Jul 21, 18:45 UTCJul 21, 20:55 UTC2h 10m
2026-07-21 SKW4055 SJC → SEA Jul 21, 15:55 UTCJul 21, 17:20 UTC1h 25m
2026-07-21 SKW4055 SJC → SEA Jul 21, 13:10 UTCJul 21, 14:50 UTC1h 40m
2026-07-20 SKW3565 - Jul 20, 21:30 UTCJul 20, 22:30 UTC1h 0m
2026-07-20 SKW3565 - Jul 20, 19:15 UTCJul 20, 20:05 UTC50m
2026-07-20 SKW4065 - Jul 20, 16:55 UTCJul 20, 18:00 UTC1h 5m
2026-07-20 SKW4065 - Jul 20, 14:40 UTCJul 20, 15:40 UTC1h 0m
2026-07-20 SKW3665 BOI → SLC Jul 20, 12:10 UTCJul 20, 13:00 UTC50m
2026-07-20 SKW3544 DTW → MSN Jul 20, 00:55 UTCJul 20, 01:50 UTC55m
2026-07-19 SKW3965 ATL → ABY Jul 19, 22:25 UTCJul 19, 22:55 UTC30m
2026-07-19 SKW3965 ATL → ABY Jul 19, 20:45 UTCJul 19, 21:15 UTC30m
2026-07-19 SKW3976 SDF → MSP Jul 19, 18:55 UTCJul 19, 19:25 UTC30m
2026-07-19 SKW3976 SDF → MSP Jul 19, 18:48 UTCJul 19, 19:25 UTC37m
2026-07-19 SKW3976 SDF → MSP Jul 19, 16:40 UTCJul 19, 17:15 UTC35m
2026-07-19 SKW4456 - Jul 19, 14:30 UTCJul 19, 15:20 UTC50m
2026-07-19 SKW4456 DTW → ORD Jul 19, 11:35 UTCJul 19, 12:40 UTC1h 5m
2026-07-19 SKW4060 LAN → DTW Jul 19, 09:33 UTCJul 19, 09:45 UTC12m
2026-07-19 SKW3684 - Jul 19, 02:55 UTCJul 19, 03:10 UTC15m
2026-07-18 SKW3785 - Jul 18, 22:30 UTCJul 18, 23:55 UTC1h 25m

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 N806SK page for operator, model, and routing details .

Mode-S AAF9C1 frequently asked

What is Mode-S code AAF9C1?
AAF9C1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N806SK.
Where is Mode-S AAF9C1 registered?
Mode-S code AAF9C1 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 AAF9C1 broadcasting right now?
Yes. Mode-S AAF9C1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AAF9C1, octal 52574701, decimal 11,205,057.
What flights does AAF9C1 operate?
Mode-S AAF9C1 has broadcast 20 distinct callsigns, including SKW3831, SKW3538, SKW4130, SKW4103, SKW4032.