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sensors Mode-S transponder

A91764

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N685SK · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
A91764
Octal
52213544
Decimal
11,081,572
Country
US
Tail
N685SK
Type
CRJ7
Transponder active on ground
Flights observed
191
Distinct callsigns
20
Country
US
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S A91764.

Country allocation

The ICAO 24-bit address A91764 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
SKW5866 SkyWest Airlines 5 2026-06-12
SKW5824 SkyWest Airlines 4 2026-06-12
SKW5723 - 4 2026-07-13
SKW5714 - 4 2026-07-11
SKW5357 - 4 2026-07-02
SKW5234 - 4 2026-07-11
SKW5055 - 4 2026-07-14
SKW473M - 4 2026-07-13
SKW4704 - 4 2026-07-03
SKW4685 - 4 2026-07-08
SKW4636 - 4 2026-07-13
SKW6031 - 3 2026-07-03
SKW6007 SkyWest Airlines 3 2026-06-11
SKW5878 SkyWest Airlines 3 2026-06-13
SKW5703 - 3 2026-07-13
SKW5643 SkyWest Airlines 3 2026-06-13
SKW5629 - 3 2026-07-13
SKW5622 - 3 2026-07-04
SKW5336 - 3 2026-07-10
SKW4778 - 3 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW5055 - Jul 14, 02:30 UTCJul 14, 03:55 UTC1h 25m
2026-07-13 SKW5055 - Jul 13, 23:20 UTCJul 14, 00:50 UTC1h 30m
2026-07-13 SKW473M ORD → PAH Jul 13, 17:13 UTCJul 13, 17:42 UTC29m
2026-07-13 SKW473M - Jul 13, 16:55 UTCJul 13, 17:45 UTC50m
2026-07-13 SKW5629 - Jul 13, 15:05 UTCJul 13, 16:00 UTC55m
2026-07-13 SKW5703 ORD → SDF Jul 13, 12:40 UTCJul 13, 13:30 UTC50m
2026-07-13 SKW5723 SBN → ORD Jul 13, 10:45 UTCJul 13, 11:10 UTC25m
2026-07-13 SKW4636 - Jul 13, 00:30 UTCJul 13, 00:45 UTC15m
2026-07-12 SKW5516 - Jul 12, 22:50 UTCJul 12, 23:25 UTC35m
2026-07-12 SKW5250 - Jul 12, 19:05 UTCJul 12, 19:30 UTC25m
2026-07-12 SKW5470 - Jul 12, 16:30 UTCJul 12, 17:50 UTC1h 20m
2026-07-12 SKW5407 - Jul 12, 14:01 UTCJul 12, 15:10 UTC1h 10m
2026-07-12 SKW5840 - Jul 12, 10:25 UTCJul 12, 11:25 UTC1h 0m
2026-07-11 SKW5640 - Jul 11, 21:10 UTCJul 11, 21:40 UTC30m
2026-07-11 SKW5714 - Jul 11, 18:35 UTCJul 11, 19:35 UTC1h 0m
2026-07-11 SKW5234 - Jul 11, 16:40 UTCJul 11, 17:20 UTC40m
2026-07-11 SKW5853 XNA → ORD Jul 11, 12:50 UTCJul 11, 14:15 UTC1h 25m
2026-07-11 SKW5853 XNA → ORD Jul 11, 12:40 UTCJul 11, 14:02 UTC1h 22m
2026-07-11 SKW5767 ORD → XNA Jul 11, 03:20 UTCJul 11, 04:55 UTC1h 35m
2026-07-10 SKW4723 - Jul 10, 23:35 UTCJul 11, 00:10 UTC35m
2026-07-10 SKW4723 CID → ORD Jul 10, 23:40 UTCJul 11, 00:10 UTC30m
2026-07-10 SKW4781 - Jul 10, 20:55 UTCJul 10, 21:35 UTC40m
2026-07-10 SKW5714 - Jul 10, 18:35 UTCJul 10, 19:40 UTC1h 5m
2026-07-10 SKW5234 - Jul 10, 16:35 UTCJul 10, 17:10 UTC35m
2026-07-10 SKW4646 CAK → ORD Jul 10, 11:00 UTCJul 10, 12:15 UTC1h 15m
2026-07-10 SKW5982 - Jul 10, 05:00 UTCJul 10, 05:50 UTC50m
2026-07-10 SKW5336 - Jul 10, 02:45 UTCJul 10, 04:05 UTC1h 20m
2026-07-10 SKW5336 - Jul 10, 00:35 UTCJul 10, 01:55 UTC1h 20m
2026-07-09 SKW4742 - Jul 9, 22:25 UTCJul 9, 23:40 UTC1h 15m
2026-07-09 SKW4748 - Jul 9, 18:40 UTCJul 9, 19:05 UTC25m
2026-07-09 SKW4748 MKE → ORD Jul 9, 18:47 UTCJul 9, 19:02 UTC15m
2026-07-09 SKW5720 - Jul 9, 17:05 UTCJul 9, 17:25 UTC20m
2026-07-09 SKW5629 SDF → ORD Jul 9, 14:40 UTCJul 9, 15:40 UTC1h 0m
2026-07-09 SKW5703 - Jul 9, 12:55 UTCJul 9, 13:45 UTC50m
2026-07-09 SKW5723 - Jul 9, 10:00 UTCJul 9, 10:25 UTC25m
2026-07-09 SKW4636 - Jul 9, 00:00 UTCJul 9, 00:20 UTC20m
2026-07-08 SKW4685 - Jul 8, 20:30 UTCJul 8, 21:55 UTC1h 25m
2026-07-08 SKW5437 - Jul 8, 18:25 UTCJul 8, 19:15 UTC50m
2026-07-08 SKW5399 - Jul 8, 15:50 UTCJul 8, 16:15 UTC25m
2026-07-08 SKW5399 MKE → ORD Jul 8, 15:34 UTCJul 8, 16:11 UTC37m
2026-07-08 SKW5842 - Jul 8, 14:05 UTCJul 8, 14:25 UTC20m
2026-07-08 SKW5699 - Jul 8, 10:55 UTCJul 8, 12:20 UTC1h 25m
2026-07-08 SKW5610 - Jul 8, 00:00 UTCJul 8, 01:10 UTC1h 10m
2026-07-04 SKW5912 - Jul 4, 16:30 UTCJul 4, 17:45 UTC1h 15m
2026-07-04 SKW5622 DEN → LNK Jul 4, 00:40 UTCJul 4, 01:40 UTC1h 0m
2026-07-03 SKW5377 - Jul 3, 21:50 UTCJul 3, 22:45 UTC55m
2026-07-03 SKW6031 - Jul 3, 19:50 UTCJul 3, 20:25 UTC35m
2026-07-03 SKW4709 - Jul 3, 17:55 UTCJul 3, 18:30 UTC35m
2026-07-03 SKW4709 GJT → DEN Jul 3, 17:31 UTCJul 3, 18:29 UTC58m
2026-07-03 SKW4704 - Jul 3, 16:05 UTCJul 3, 16:45 UTC40m

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 N685SK page for operator, model, and routing details .

Mode-S A91764 frequently asked

What is Mode-S code A91764?
A91764 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N685SK.
Where is Mode-S A91764 registered?
Mode-S code A91764 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 A91764 broadcasting right now?
Mode-S A91764 is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A91764, octal 52213544, decimal 11,081,572.
What flights does A91764 operate?
Mode-S A91764 has broadcast 20 distinct callsigns, including SKW5866, SKW5824, SKW5723, SKW5714, SKW5357.