Apparatus

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sensors Mode-S transponder

AA1BA3

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N750SK · BOMBARDIER Regional Jet CRJ-700 · operated by SKYWEST AIRLINES INC

Hex
AA1BA3
Octal
52415643
Decimal
11,148,195
Country
US
Tail
N750SK
Type
CRJ7
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
824
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S AA1BA3.

Country allocation

The ICAO 24-bit address AA1BA3 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
SKW5003 - 12 2026-07-21
SKW6455 - 11 2026-07-09
SKW6298 SkyWest Airlines 11 2026-06-03
SKW4953 - 11 2026-07-04
SKW6249 - 10 2026-07-12
SKW6457 SkyWest Airlines 9 2026-05-02
SKW6451 - 9 2026-06-24
SKW6388 SkyWest Airlines 9 2026-06-13
SKW6345 SkyWest Airlines 9 2026-06-19
SKW4947 SkyWest Airlines 9 2026-07-23
SKW4912 - 9 2026-06-26
SKW6445 - 8 2026-07-16
SKW6433 - 8 2026-07-12
SKW6399 - 8 2026-06-24
SKW6274 SkyWest Airlines 8 2026-07-23
SKW6273 SkyWest Airlines 8 2026-07-23
SKW6204 - 8 2026-07-07
SKW4966 SkyWest Airlines 8 2026-06-04
SKW4826 - 8 2026-07-19
SKW4824 - 8 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW6324 STL → ORD Jul 26, 19:50 UTCJul 26, 21:55 UTC2h 5m
2026-07-26 SKW6348 ORD → GRR Jul 26, 17:45 UTCJul 26, 18:50 UTC1h 5m
2026-07-26 SKW6348 ORD → GRR Jul 26, 17:45 UTCJul 26, 18:51 UTC1h 6m
2026-07-26 SKW6348 ORD → GRR Jul 26, 15:55 UTCJul 26, 16:55 UTC1h 0m
2026-07-26 SKW6393 TUS → LAX Jul 26, 13:10 UTCJul 26, 14:15 UTC1h 5m
2026-07-26 SKW6393 TUS → LAX Jul 26, 13:07 UTCJul 26, 14:11 UTC1h 4m
2026-07-26 SKW6315 LAX → ABQ Jul 26, 04:10 UTCJul 26, 05:15 UTC1h 5m
2026-07-26 SKW6387 TUL → ORD Jul 26, 01:45 UTCJul 26, 03:10 UTC1h 25m
2026-07-26 SKW6387 TUL → ORD Jul 26, 01:30 UTCJul 26, 03:02 UTC1h 32m
2026-07-25 SKW6387 TUL → ORD Jul 25, 21:20 UTCJul 25, 22:45 UTC1h 25m
2026-07-25 SKW6387 TUL → ORD Jul 25, 21:24 UTCJul 25, 23:03 UTC1h 39m
2026-07-25 SKW4957 DFW → GGG Jul 25, 18:05 UTCJul 25, 20:00 UTC1h 55m
2026-07-25 SKW4957 DFW → GGG Jul 25, 14:55 UTCJul 25, 16:50 UTC1h 55m
2026-07-24 SKW4957 DFW → GGG Jul 24, 18:10 UTCJul 24, 20:00 UTC1h 50m
2026-07-24 SKW4957 DFW → GGG Jul 24, 15:00 UTCJul 24, 16:55 UTC1h 55m
2026-07-24 SKW4945 TXK → DFW Jul 24, 01:40 UTCJul 24, 03:10 UTC1h 30m
2026-07-23 SKW4947 IDA → PHX Jul 23, 23:49 UTCJul 24, 00:30 UTC41m
2026-07-23 SKW4947 IDA → PHX Jul 23, 23:40 UTCJul 24, 00:35 UTC55m
2026-07-23 SKW6517 PHX → SBA Jul 23, 20:32 UTCJul 23, 22:10 UTC1h 38m
2026-07-23 SKW6517 PHX → SBA Jul 23, 20:25 UTCJul 23, 22:15 UTC1h 50m
2026-07-23 SKW6273 HOU → DFW Jul 23, 17:35 UTCJul 23, 19:20 UTC1h 45m
2026-07-23 SKW6273 HOU → DFW Jul 23, 17:40 UTCJul 23, 19:09 UTC1h 29m
2026-07-23 SKW6250 PHX → SLC Jul 23, 14:30 UTCJul 23, 15:35 UTC1h 5m
2026-07-23 SKW6250 PHX → SLC Jul 23, 14:26 UTCJul 23, 15:34 UTC1h 8m
2026-07-23 SKW6250 PHX → SLC Jul 23, 12:20 UTCJul 23, 13:20 UTC1h 0m
2026-07-23 SKW6274 DFW → FSD Jul 23, 02:05 UTCJul 23, 03:35 UTC1h 30m
2026-07-23 SKW6274 DFW → FSD Jul 23, 02:01 UTCJul 23, 03:34 UTC1h 33m
2026-07-22 SKW6274 DFW → FSD Jul 22, 23:35 UTCJul 23, 01:20 UTC1h 45m
2026-07-22 SKW5008 PSP → PHX Jul 22, 20:15 UTCJul 22, 21:10 UTC55m
2026-07-22 SKW5008 PSP → PHX Jul 22, 20:11 UTCJul 22, 21:02 UTC51m
2026-07-22 SKW5008 PSP → PHX Jul 22, 18:50 UTCJul 22, 19:30 UTC40m
2026-07-22 SKW6209 MAF → DFW Jul 22, 15:40 UTCJul 22, 17:40 UTC2h 0m
2026-07-22 SKW240Y - Jul 22, 12:00 UTCJul 22, 14:10 UTC2h 10m
2026-07-21 SKW5003 - Jul 21, 17:45 UTCJul 21, 18:05 UTC20m
2026-07-21 SKW5003 HSV → ORD Jul 21, 15:55 UTCJul 21, 18:05 UTC2h 10m
2026-07-21 SKW5003 HSV → ORD Jul 21, 15:59 UTCJul 21, 17:30 UTC1h 31m
2026-07-21 SKW5003 - Jul 21, 13:50 UTCJul 21, 15:00 UTC1h 10m
2026-07-21 SKW6223 SAT → LAX Jul 21, 10:15 UTCJul 21, 11:30 UTC1h 15m
2026-07-21 SKW6223 SAT → LAX Jul 21, 10:14 UTCJul 21, 11:19 UTC1h 5m
2026-07-21 SKW6222 LAX → SFO Jul 21, 02:50 UTCJul 21, 03:45 UTC55m
2026-07-21 SKW6291 SJC → LAX Jul 21, 00:35 UTCJul 21, 01:35 UTC1h 0m
2026-07-21 SKW6291 SJC → LAX Jul 21, 00:33 UTCJul 21, 01:42 UTC1h 9m
2026-07-20 SKW6291 SJC → LAX Jul 20, 23:00 UTCJul 20, 23:50 UTC50m
2026-07-20 SKW6493 ORD → RST Jul 20, 17:00 UTCJul 20, 18:45 UTC1h 45m
2026-07-20 SKW6493 ORD → RST Jul 20, 17:07 UTCJul 20, 18:25 UTC1h 18m
2026-07-19 SKW6487 DFW → AEX Jul 19, 23:55 UTCJul 20, 01:40 UTC1h 45m
2026-07-19 SKW6418 - Jul 19, 20:35 UTCJul 19, 20:45 UTC10m
2026-07-19 SKW6418 AZO → ORD Jul 19, 20:31 UTCJul 19, 21:05 UTC34m
2026-07-19 SKW6418 - Jul 19, 19:05 UTCJul 19, 19:35 UTC30m
2026-07-19 SKW6488 ORD → YYZ Jul 19, 15:55 UTCJul 19, 17:15 UTC1h 20m

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 N750SK page for operator, model, and routing details .

Mode-S AA1BA3 frequently asked

What is Mode-S code AA1BA3?
AA1BA3 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N750SK.
Where is Mode-S AA1BA3 registered?
Mode-S code AA1BA3 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 AA1BA3 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex AA1BA3, octal 52415643, decimal 11,148,195.
What flights does AA1BA3 operate?
Mode-S AA1BA3 has broadcast 20 distinct callsigns, including SKW5003, SKW6455, SKW6298, SKW4953, SKW6249.