Apparatus

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sensors Mode-S transponder

A9F6B9

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N741EV · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A9F6B9
Octal
52373271
Decimal
11,138,745
Country
US
Tail
N741EV
Type
CRJ7
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
801
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S A9F6B9.

Country allocation

The ICAO 24-bit address A9F6B9 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
SKW4936 SkyWest Airlines 15 2026-07-25
SKW6454 SkyWest Airlines 13 2026-05-01
SKW6399 - 13 2026-06-30
SKW4965 SkyWest Airlines 12 2026-06-09
SKW6458 SkyWest Airlines 11 2026-05-18
SKW6437 - 11 2026-07-08
SKW6261 - 11 2026-07-15
SKW4986 SkyWest Airlines 11 2026-07-26
SKW4909 - 10 2026-06-27
SKW4886 SkyWest Airlines 10 2026-06-09
SKW6439 - 9 2026-06-19
SKW6268 SkyWest Airlines 9 2026-05-16
SKW6218 - 9 2026-07-11
SKW6211 - 9 2026-07-12
SKW6193 - 9 2026-07-15
SKW6344 SkyWest Airlines 8 2026-07-18
SKW6276 SkyWest Airlines 8 2026-05-01
SKW6263 - 8 2026-06-30
SKW4831 - 8 2026-06-25
SKW6450 SkyWest Airlines 7 2026-06-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6459 LAX → TUS Jul 26, 20:45 UTCJul 26, 22:15 UTC1h 30m
2026-07-26 SKW4986 ORD → ICT Jul 26, 18:50 UTCJul 26, 19:15 UTC25m
2026-07-26 SKW4986 ORD → ICT Jul 26, 17:15 UTCJul 26, 17:35 UTC20m
2026-07-26 SKW4939 MAF → PHX Jul 26, 14:26 UTCJul 26, 15:44 UTC1h 18m
2026-07-26 SKW5013 ORD → LEX Jul 26, 12:42 UTCJul 26, 13:26 UTC44m
2026-07-26 SKW5013 ORD → LEX Jul 26, 12:45 UTCJul 26, 13:30 UTC45m
2026-07-26 SKW4897 ORD → CVG Jul 26, 10:15 UTCJul 26, 10:55 UTC40m
2026-07-26 SKW4933 DFW → CLL Jul 26, 03:05 UTCJul 26, 03:40 UTC35m
2026-07-26 SKW4923 DSM → ORD Jul 26, 01:00 UTCJul 26, 01:45 UTC45m
2026-07-25 SKW4923 DSM → ORD Jul 25, 23:10 UTCJul 25, 23:50 UTC40m
2026-07-25 SKW4936 MSY → DFW Jul 25, 20:45 UTCJul 25, 21:35 UTC50m
2026-07-25 SKW4936 MSY → DFW Jul 25, 20:41 UTCJul 25, 21:33 UTC52m
2026-07-25 SKW4936 MSY → DFW Jul 25, 19:10 UTCJul 25, 19:50 UTC40m
2026-07-25 SKW6343 DAY → ORD Jul 25, 15:50 UTCJul 25, 16:25 UTC35m
2026-07-25 SKW6343 DAY → ORD Jul 25, 13:55 UTCJul 25, 14:25 UTC30m
2026-07-24 SKW6414 SLC → ORD Jul 24, 12:50 UTCJul 24, 14:15 UTC1h 25m
2026-07-24 SKW6414 SLC → ORD Jul 24, 12:37 UTCJul 24, 14:11 UTC1h 34m
2026-07-24 SKW6442 ORD → ASE Jul 24, 02:50 UTCJul 24, 04:50 UTC2h 0m
2026-07-24 SKW6442 ORD → ASE Jul 24, 02:55 UTCJul 24, 04:40 UTC1h 45m
2026-07-24 SKW6355 CVG → ORD Jul 24, 00:30 UTCJul 24, 01:30 UTC1h 0m
2026-07-24 SKW6355 CVG → ORD Jul 24, 00:24 UTCJul 24, 01:24 UTC1h 0m
2026-07-23 SKW6355 CVG → ORD Jul 23, 22:10 UTCJul 23, 22:50 UTC40m
2026-07-23 SKW6299 ORD → STL Jul 23, 18:55 UTCJul 23, 20:12 UTC1h 17m
2026-07-23 SKW6299 ORD → STL Jul 23, 16:35 UTCJul 23, 20:15 UTC3h 40m
2026-07-23 SKW6503 ORD → RST Jul 23, 13:20 UTCJul 23, 14:45 UTC1h 25m
2026-07-23 SKW6503 ORD → RST Jul 23, 13:12 UTCJul 23, 14:41 UTC1h 29m
2026-07-23 SKW6192 PHX → SEA Jul 23, 00:15 UTCJul 23, 01:35 UTC1h 20m
2026-07-22 SKW4980 - Jul 22, 19:40 UTCJul 22, 22:00 UTC2h 20m
2026-07-22 SKW4980 - Jul 22, 16:25 UTCJul 22, 18:30 UTC2h 5m
2026-07-22 SKW6503 ORD → RST Jul 22, 13:30 UTCJul 22, 14:55 UTC1h 25m
2026-07-22 SKW6503 ORD → RST Jul 22, 13:19 UTCJul 22, 14:53 UTC1h 34m
2026-07-22 SKW6192 PHX → SEA Jul 22, 00:10 UTCJul 22, 01:25 UTC1h 15m
2026-07-21 SKW5002 ORD → RST Jul 21, 21:25 UTCJul 21, 22:10 UTC45m
2026-07-21 SKW5002 ORD → RST Jul 21, 19:40 UTCJul 21, 20:20 UTC40m
2026-07-21 SKW4963 SJC → LAX Jul 21, 16:30 UTCJul 21, 18:00 UTC1h 30m
2026-07-21 SKW4963 SJC → LAX Jul 21, 13:45 UTCJul 21, 15:00 UTC1h 15m
2026-07-21 SKW4926 SWO → DFW Jul 21, 11:10 UTCJul 21, 11:50 UTC40m
2026-07-21 SKW4961 MLI → ORD Jul 21, 02:45 UTCJul 21, 03:30 UTC45m
2026-07-21 SKW4961 MLI → ORD Jul 21, 02:45 UTCJul 21, 03:23 UTC38m
2026-07-20 SKW4960 TUL → PHX Jul 20, 23:10 UTCJul 21, 00:45 UTC1h 35m
2026-07-20 SKW4960 TUL → PHX Jul 20, 20:40 UTCJul 20, 21:55 UTC1h 15m
2026-07-20 SKW6296 LAX → SFO Jul 20, 14:00 UTCJul 20, 17:35 UTC3h 35m
2026-07-20 SKW4930 MLI → ORD Jul 20, 10:25 UTCJul 20, 11:05 UTC40m
2026-07-20 SKW4885 SFO → LAX Jul 20, 04:00 UTCJul 20, 04:15 UTC15m
2026-07-20 SKW4885 SFO → LAX Jul 20, 03:56 UTCJul 20, 04:37 UTC41m
2026-07-20 SKW6342 - Jul 20, 01:15 UTCJul 20, 02:20 UTC1h 5m
2026-07-20 SKW6342 BTR → DFW Jul 20, 01:10 UTCJul 20, 02:19 UTC1h 9m
2026-07-19 SKW6342 DFW → BTR Jul 19, 23:05 UTCJul 20, 00:00 UTC55m
2026-07-19 SKW6446 PHX → ELP Jul 19, 19:50 UTCJul 19, 21:15 UTC1h 25m
2026-07-19 SKW6446 PHX → ELP Jul 19, 19:46 UTCJul 19, 21:16 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 N741EV page for operator, model, and routing details .

Mode-S A9F6B9 frequently asked

What is Mode-S code A9F6B9?
A9F6B9 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N741EV.
Where is Mode-S A9F6B9 registered?
Mode-S code A9F6B9 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 A9F6B9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A9F6B9, octal 52373271, decimal 11,138,745.
What flights does A9F6B9 operate?
Mode-S A9F6B9 has broadcast 20 distinct callsigns, including SKW4936, SKW6454, SKW6399, SKW4965, SKW6458.