Apparatus

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sensors Mode-S transponder

A7619B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N575GJ · operated by SKYWEST AIRLINES INC

Hex
A7619B
Octal
51660633
Decimal
10,969,499
Country
US
Tail
N575GJ
Type
CRJ7
No current signal · last broadcast Jul 26, 21:20 UTC
Flights observed
473
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 21:20 UTC

Last known position

Most recent position reported by Mode-S A7619B.

Country allocation

The ICAO 24-bit address A7619B 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
SKW5869 - 11 2026-07-19
SKW5055 - 9 2026-07-17
SKW5977 - 7 2026-07-18
SKW5935 - 6 2026-07-07
SKW5723 SkyWest Airlines 6 2026-05-14
SKW5407 SkyWest Airlines 6 2026-07-25
SKW5402 SkyWest Airlines 6 2026-06-05
SKW6007 SkyWest Airlines 5 2026-04-25
SKW5910 SkyWest Airlines 5 2026-04-27
SKW5345 SkyWest Airlines 5 2026-07-18
SKW5195 - 5 2026-07-10
SKW4691 - 5 2026-06-30
SKW6020 SkyWest Airlines 4 2026-04-28
SKW5998 SkyWest Airlines 4 2026-04-23
SKW595Y SkyWest Airlines 4 2026-05-21
SKW5890 SkyWest Airlines 4 2026-06-03
SKW5746 - 4 2026-07-01
SKW5648 - 4 2026-07-19
SKW5612 SkyWest Airlines 4 2026-06-03
SKW5610 - 4 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4685 EUG → SFO Jul 26, 20:15 UTCJul 26, 21:20 UTC1h 5m
2026-07-26 SKW5437 PHX → SFO Jul 26, 18:20 UTCJul 26, 19:10 UTC50m
2026-07-26 SKW5437 PHX → SFO Jul 26, 18:18 UTCJul 26, 19:15 UTC57m
2026-07-26 SKW5609 SLC → SFO Jul 26, 13:15 UTCJul 26, 14:10 UTC55m
2026-07-26 SKW5609 SLC → SFO Jul 26, 13:07 UTCJul 26, 14:00 UTC53m
2026-07-26 SKW533T ORD → COU Jul 26, 03:35 UTCJul 26, 04:20 UTC45m
2026-07-25 SKW5591 LAX → FAT Jul 25, 22:05 UTCJul 25, 23:30 UTC1h 25m
2026-07-25 SKW5368 MKE → IAH Jul 25, 19:45 UTCJul 25, 20:55 UTC1h 10m
2026-07-25 SKW5470 ORD → CHA Jul 25, 16:35 UTCJul 25, 17:55 UTC1h 20m
2026-07-25 SKW5407 ONT → SFO Jul 25, 13:55 UTCJul 25, 15:10 UTC1h 15m
2026-07-25 SKW5598 ORD → MLI Jul 25, 11:55 UTCJul 25, 12:35 UTC40m
2026-07-25 SKW5598 ORD → MLI Jul 25, 11:44 UTCJul 25, 12:27 UTC43m
2026-07-25 SKW5539 ORD → SLC Jul 25, 04:40 UTCJul 25, 05:00 UTC20m
2026-07-25 SKW5336 FAT → SFO Jul 25, 02:20 UTCJul 25, 03:40 UTC1h 20m
2026-07-25 SKW4742 ELP → ORD Jul 25, 00:10 UTCJul 25, 01:20 UTC1h 10m
2026-07-24 SKW4778 MKE → ORD Jul 24, 18:15 UTCJul 24, 19:50 UTC1h 35m
2026-07-24 SKW4688 DEN → FAR Jul 24, 15:50 UTCJul 24, 17:15 UTC1h 25m
2026-07-24 SKW5495 ORD → MKE Jul 24, 13:20 UTCJul 24, 14:10 UTC50m
2026-07-24 SKW4684 DEN → SAF Jul 24, 04:45 UTCJul 24, 05:50 UTC1h 5m
2026-07-24 SKW5078 LBL → DEN Jul 24, 01:50 UTCJul 24, 02:50 UTC1h 0m
2026-07-24 SKW577P DEN → JMS Jul 24, 00:25 UTCJul 24, 00:50 UTC25m
2026-07-23 SKW5661 PHL → ORD Jul 23, 17:35 UTCJul 23, 18:25 UTC50m
2026-07-23 SKW4731 DEN → SAF Jul 23, 15:50 UTCJul 23, 16:25 UTC35m
2026-07-23 SKW4731 DEN → SAF Jul 23, 15:43 UTCJul 23, 16:29 UTC46m
2026-07-23 SKW4738 SLC → ORD Jul 23, 05:45 UTCJul 23, 12:30 UTC6h 45m
2026-07-23 SKW5431 LNK → DEN Jul 23, 02:30 UTCJul 23, 04:20 UTC1h 50m
2026-07-22 SKW5827 PSP → SFO Jul 22, 20:15 UTCJul 22, 21:15 UTC1h 0m
2026-07-22 SKW5708 - Jul 22, 16:45 UTCJul 22, 17:20 UTC35m
2026-07-22 SKW5927 - Jul 22, 14:15 UTCJul 22, 14:50 UTC35m
2026-07-22 SKW4738 SLC → ORD Jul 22, 11:30 UTCJul 22, 12:35 UTC1h 5m
2026-07-22 SKW4738 SLC → ORD Jul 22, 11:21 UTCJul 22, 12:34 UTC1h 13m
2026-07-22 SKW700V DEN → DVL Jul 22, 02:40 UTCJul 22, 03:30 UTC50m
2026-07-21 SKW5906 BNA → ORD Jul 21, 21:10 UTCJul 22, 01:00 UTC3h 50m
2026-07-21 SKW5346 DEN → STL Jul 21, 18:30 UTCJul 21, 19:40 UTC1h 10m
2026-07-21 SKW6088 ORD → BNA Jul 21, 16:45 UTCJul 21, 17:50 UTC1h 5m
2026-07-21 SKW6088 ORD → BNA Jul 21, 16:41 UTCJul 21, 17:50 UTC1h 9m
2026-07-20 SKW5825 LNK → DEN Jul 20, 16:50 UTCJul 20, 17:55 UTC1h 5m
2026-07-20 SKW5215 ORD → LNK Jul 20, 14:35 UTCJul 20, 15:45 UTC1h 10m
2026-07-20 SKW5215 ORD → LNK Jul 20, 14:37 UTCJul 20, 15:42 UTC1h 5m
2026-07-20 SKW5889 - Jul 20, 10:45 UTCJul 20, 11:20 UTC35m
2026-07-20 SKW5889 FWA → ORD Jul 20, 10:16 UTCJul 20, 11:15 UTC59m
2026-07-19 SKW701H ORD → MCW Jul 19, 23:00 UTCJul 19, 23:25 UTC25m
2026-07-19 SKW5869 COU → ORD Jul 19, 20:31 UTCJul 19, 21:32 UTC1h 1m
2026-07-19 SKW404F - Jul 19, 18:25 UTCJul 19, 19:10 UTC45m
2026-07-19 SKW5466 BOI → SFO Jul 19, 15:15 UTCJul 19, 16:50 UTC1h 35m
2026-07-19 SKW5409 ORD → FAR Jul 19, 12:40 UTCJul 19, 13:40 UTC1h 0m
2026-07-19 SKW5648 - Jul 19, 01:45 UTCJul 19, 02:15 UTC30m
2026-07-18 SKW5345 ORD → CAK Jul 18, 21:05 UTCJul 18, 21:25 UTC20m
2026-07-18 SKW5345 ORD → CAK Jul 18, 21:10 UTCJul 18, 21:25 UTC15m
2026-07-18 SKW5977 - Jul 18, 17:00 UTCJul 18, 18:50 UTC1h 50m

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 N575GJ page for operator, model, and routing details .

Mode-S A7619B frequently asked

What is Mode-S code A7619B?
A7619B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N575GJ.
Where is Mode-S A7619B registered?
Mode-S code A7619B 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 A7619B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A7619B, octal 51660633, decimal 10,969,499.
What flights does A7619B operate?
Mode-S A7619B has broadcast 20 distinct callsigns, including SKW5869, SKW5055, SKW5977, SKW5935, SKW5723.