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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
No current signal · last broadcast Jul 26, 22:05 UTC
Flights observed
267
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:05 UTC

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 6 2026-07-21
SKW5824 SkyWest Airlines 6 2026-07-21
SKW5878 SkyWest Airlines 5 2026-07-23
SKW5869 - 5 2026-07-16
SKW5723 - 5 2026-07-16
SKW4636 - 5 2026-07-15
SKW5714 - 4 2026-07-11
SKW5643 SkyWest Airlines 4 2026-07-23
SKW5610 - 4 2026-07-18
SKW5551 SkyWest Airlines 4 2026-07-26
SKW5357 - 4 2026-07-02
SKW5310 SkyWest Airlines 4 2026-07-23
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
SKW404F - 4 2026-07-16
SKW6031 - 3 2026-07-03
SKW6007 SkyWest Airlines 3 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW5099 ORD → JST Jul 26, 20:55 UTCJul 26, 22:00 UTC1h 5m
2026-07-26 SKW5089 MEI → IAH Jul 26, 18:05 UTCJul 26, 18:45 UTC40m
2026-07-26 SKW6065 TUS → IAH Jul 26, 06:05 UTCJul 26, 06:30 UTC25m
2026-07-26 SKW383H DEN → RIW Jul 26, 04:00 UTCJul 26, 04:30 UTC30m
2026-07-26 SKW5551 SBP → DEN Jul 26, 01:05 UTCJul 26, 02:05 UTC1h 0m
2026-07-26 SKW5551 SBP → DEN Jul 26, 00:36 UTCJul 26, 02:01 UTC1h 25m
2026-07-25 SKW416C DEN → GUC Jul 25, 22:20 UTCJul 25, 23:15 UTC55m
2026-07-25 SKW4807 SFO → BUR Jul 25, 19:00 UTCJul 25, 20:35 UTC1h 35m
2026-07-25 SKW5333 ORD → MSN Jul 25, 16:35 UTCJul 25, 17:35 UTC1h 0m
2026-07-25 SKW5346 DEN → STL Jul 25, 13:20 UTCJul 25, 14:35 UTC1h 15m
2026-07-24 SKW455E DEN → HOB Jul 24, 23:45 UTCJul 25, 00:35 UTC50m
2026-07-24 SKW5302 ORD → CVG Jul 24, 18:10 UTCJul 24, 22:05 UTC3h 55m
2026-07-24 SKW4725 DEN → BFL Jul 24, 16:40 UTCJul 24, 17:00 UTC20m
2026-07-24 SKW764Y DEN → COS Jul 24, 03:40 UTCJul 24, 04:00 UTC20m
2026-07-24 SKW4799 ORD → CRW Jul 24, 01:20 UTCJul 24, 02:15 UTC55m
2026-07-23 SKW5643 ORD → TYS Jul 23, 22:45 UTCJul 23, 23:35 UTC50m
2026-07-23 SKW5878 SFO → SBA Jul 23, 20:05 UTCJul 23, 21:00 UTC55m
2026-07-23 SKW5310 DEN → SAF Jul 23, 18:25 UTCJul 23, 19:10 UTC45m
2026-07-22 SKW5906 BNA → ORD Jul 22, 21:20 UTCJul 23, 04:20 UTC7h 0m
2026-07-22 SKW5235 DEN → DEN Jul 22, 16:00 UTCJul 22, 20:25 UTC4h 25m
2026-07-22 SKW5495 ORD → MKE Jul 22, 13:20 UTCJul 22, 14:15 UTC55m
2026-07-22 SKW4684 DEN → SAF Jul 22, 01:55 UTCJul 22, 02:35 UTC40m
2026-07-21 SKW5472 ORD → CHA Jul 21, 22:40 UTCJul 22, 00:05 UTC1h 25m
2026-07-21 SKW5472 ORD → CHA Jul 21, 22:33 UTCJul 21, 23:50 UTC1h 17m
2026-07-21 SKW394Y DEN → MAF Jul 21, 20:00 UTCJul 21, 21:20 UTC1h 20m
2026-07-21 SKW5708 RAP → DEN Jul 21, 16:41 UTCJul 21, 17:19 UTC38m
2026-07-21 SKW5708 DEN → DEN Jul 21, 14:35 UTCJul 21, 17:25 UTC2h 50m
2026-07-21 SKW5866 LNK → DEN Jul 21, 11:45 UTCJul 21, 12:55 UTC1h 10m
2026-07-21 SKW5824 ORD → FNT Jul 21, 02:50 UTCJul 21, 03:45 UTC55m
2026-07-21 SKW5824 ORD → FNT Jul 21, 02:50 UTCJul 21, 03:44 UTC54m
2026-07-21 SKW5551 SBP → DEN Jul 21, 00:35 UTCJul 21, 01:30 UTC55m
2026-07-21 SKW5551 SBP → DEN Jul 21, 00:11 UTCJul 21, 01:20 UTC1h 9m
2026-07-20 SKW395Z DEN → IDA Jul 20, 22:05 UTCJul 21, 01:00 UTC2h 55m
2026-07-20 SKW395Z DEN → IDA Jul 20, 22:08 UTCJul 20, 23:10 UTC1h 2m
2026-07-20 SKW5878 - Jul 20, 19:40 UTCJul 20, 20:30 UTC50m
2026-07-20 SKW5310 DEN → SAF Jul 20, 17:45 UTCJul 20, 18:25 UTC40m
2026-07-20 SKW5495 ORD → MKE Jul 20, 13:20 UTCJul 20, 14:15 UTC55m
2026-07-20 SKW4684 - Jul 20, 01:50 UTCJul 20, 02:25 UTC35m
2026-07-19 SKW5233 SFO → BUR Jul 19, 20:40 UTCJul 19, 23:45 UTC3h 5m
2026-07-19 SKW5462 FAR → DEN Jul 19, 16:55 UTCJul 19, 18:20 UTC1h 25m
2026-07-19 SKW5537 - Jul 19, 14:30 UTCJul 19, 15:55 UTC1h 25m
2026-07-19 SKW5699 - Jul 19, 10:45 UTCJul 19, 12:25 UTC1h 40m
2026-07-18 SKW5610 - Jul 18, 23:50 UTCJul 19, 01:10 UTC1h 20m
2026-07-18 SKW4726 ORD → HPN Jul 18, 22:10 UTCJul 18, 22:45 UTC35m
2026-07-18 SKW5933 PWM → ORD Jul 18, 18:45 UTCJul 18, 19:05 UTC20m
2026-07-18 SKW5575 - Jul 18, 16:35 UTCJul 18, 17:05 UTC30m
2026-07-18 SKW5341 - Jul 18, 13:35 UTCJul 18, 14:05 UTC30m
2026-07-18 SKW4633 BOI → LAX Jul 18, 01:00 UTCJul 18, 01:39 UTC40m
2026-07-18 SKW4633 BOI → LAX Jul 18, 00:33 UTCJul 18, 01:31 UTC58m
2026-07-17 SKW5633 - Jul 17, 21:30 UTCJul 17, 22:10 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?
No active broadcast right now. Last signal was Jul 26, 22:05 UTC.
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, SKW5878, SKW5869, SKW5723.