Apparatus

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sensors Mode-S transponder

A83953

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N629SY · operated by SKYWEST AIRLINES INC

Hex
A83953
Octal
52034523
Decimal
11,024,723
Country
US
Tail
N629SY
Type
E75L
Broadcasting now · callsign SKW5404 · 16,875 ft
Flights observed
570
Distinct callsigns
20
Country
US
Last broadcast
1h ago

Current position

A83953 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A83953 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
SKW5493 SkyWest Airlines 11 2026-06-03
SKW5781 - 10 2026-06-26
SKW5766 - 9 2026-07-12
SKW5642 - 9 2026-07-07
SKW5635 SkyWest Airlines 9 2026-04-23
SKW5453 SkyWest Airlines 8 2026-04-24
SKW5211 - 8 2026-07-12
SKW4700 - 8 2026-07-09
SKW5779 - 7 2026-07-12
SKW5778 - 7 2026-07-12
SKW5697 - 7 2026-07-10
SKW4756 - 7 2026-07-09
SKW5914 SkyWest Airlines 6 2026-06-12
SKW5441 - 6 2026-07-09
SKW5403 - 6 2026-07-05
SKW5343 - 6 2026-07-11
SKW5300 SkyWest Airlines 6 2026-06-04
SKW4767 - 6 2026-07-11
SKW4669 - 6 2026-07-05
SKW5988 SkyWest Airlines 5 2026-06-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW5404 - Jul 14, 22:35 UTCJul 14, 22:45 UTC9m
2026-07-14 SKW4693 - Jul 14, 19:35 UTCJul 14, 21:15 UTC1h 40m
2026-07-14 SKW5520 CLD → DEN Jul 14, 16:15 UTCJul 14, 18:10 UTC1h 55m
2026-07-14 SKW5529 DEN → CLD Jul 14, 01:40 UTCJul 14, 04:20 UTC2h 40m
2026-07-13 SKW4768 OKC → DEN Jul 13, 22:55 UTCJul 14, 00:10 UTC1h 15m
2026-07-13 SKW5808 DEN → OKC Jul 13, 20:40 UTCJul 13, 21:55 UTC1h 15m
2026-07-13 SKW5536 - Jul 13, 17:25 UTCJul 13, 19:15 UTC1h 50m
2026-07-13 SKW4785 DEN → MKE Jul 13, 02:55 UTCJul 13, 04:55 UTC2h 0m
2026-07-13 SKW4652 ABQ → DEN Jul 13, 00:05 UTCJul 13, 01:05 UTC1h 0m
2026-07-12 SKW4760 DEN → ABQ Jul 12, 22:00 UTCJul 12, 22:55 UTC55m
2026-07-12 SKW4760 DEN → ABQ Jul 12, 21:56 UTCJul 12, 22:54 UTC58m
2026-07-12 SKW5277 DSM → DEN Jul 12, 18:55 UTCJul 12, 20:06 UTC1h 11m
2026-07-12 SKW5211 DEN → DSM Jul 12, 16:20 UTCJul 12, 17:45 UTC1h 25m
2026-07-12 SKW5211 DEN → DSM Jul 12, 16:11 UTCJul 12, 17:43 UTC1h 32m
2026-07-12 SKW5766 - Jul 12, 14:01 UTCJul 12, 14:25 UTC25m
2026-07-12 SKW5779 - Jul 12, 01:45 UTCJul 12, 02:05 UTC20m
2026-07-12 SKW5778 - Jul 12, 00:05 UTCJul 12, 00:30 UTC25m
2026-07-11 SKW5773 - Jul 11, 22:20 UTCJul 11, 22:35 UTC15m
2026-07-11 SKW5773 DEN → ASE Jul 11, 22:00 UTCJul 11, 22:56 UTC56m
2026-07-11 SKW4767 - Jul 11, 19:55 UTCJul 11, 20:20 UTC25m
2026-07-11 SKW5343 - Jul 11, 18:05 UTCJul 11, 18:30 UTC25m
2026-07-11 SKW4659 ABQ → DEN Jul 11, 15:25 UTCJul 11, 16:20 UTC55m
2026-07-11 SKW4761 DEN → ABQ Jul 11, 04:05 UTCJul 11, 05:01 UTC55m
2026-07-10 SKW4658 - Jul 10, 20:55 UTCJul 10, 21:50 UTC55m
2026-07-10 SKW771M - Jul 10, 19:20 UTCJul 10, 19:55 UTC35m
2026-07-10 SKW5884 - Jul 10, 17:50 UTCJul 10, 18:30 UTC40m
2026-07-10 SKW5608 - Jul 10, 05:15 UTCJul 10, 05:45 UTC30m
2026-07-10 SKW5608 DEN → RAP Jul 10, 05:03 UTCJul 10, 06:01 UTC58m
2026-07-10 SKW6011 - Jul 10, 03:30 UTCJul 10, 03:55 UTC25m
2026-07-10 SKW5697 DEN → ASE Jul 10, 01:47 UTCJul 10, 02:26 UTC39m
2026-07-10 SKW5697 - Jul 10, 01:40 UTCJul 10, 02:05 UTC25m
2026-07-10 SKW5607 - Jul 10, 00:20 UTCJul 10, 00:45 UTC25m
2026-07-09 SKW4700 - Jul 9, 17:35 UTCJul 9, 19:05 UTC1h 30m
2026-07-09 SKW4700 LAX → ASE Jul 9, 17:42 UTCJul 9, 19:23 UTC1h 41m
2026-07-09 SKW4756 - Jul 9, 14:40 UTCJul 9, 16:00 UTC1h 20m
2026-07-09 SKW5441 - Jul 9, 03:25 UTCJul 9, 04:40 UTC1h 15m
2026-07-09 SKW5441 LAX → ACV Jul 9, 03:33 UTCJul 9, 04:54 UTC1h 21m
2026-07-09 SKW5731 - Jul 9, 01:15 UTCJul 9, 01:50 UTC35m
2026-07-09 SKW5731 SBP → LAX Jul 9, 01:26 UTCJul 9, 01:56 UTC30m
2026-07-08 SKW5550 - Jul 8, 23:40 UTCJul 9, 00:10 UTC30m
2026-07-08 SKW5550 LAX → SBP Jul 8, 23:43 UTCJul 9, 00:10 UTC27m
2026-07-08 SKW6008 - Jul 8, 20:20 UTCJul 8, 22:00 UTC1h 40m
2026-07-08 SKW5980 - Jul 8, 17:15 UTCJul 8, 18:40 UTC1h 25m
2026-07-08 SKW5408 - Jul 8, 14:00 UTCJul 8, 15:30 UTC1h 30m
2026-07-08 SKW5744 - Jul 8, 03:30 UTCJul 8, 05:10 UTC1h 40m
2026-07-08 SKW5759 - Jul 8, 01:25 UTCJul 8, 02:00 UTC35m
2026-07-08 SKW5759 FAT → LAX Jul 8, 01:28 UTCJul 8, 02:01 UTC33m
2026-07-07 SKW4806 - Jul 7, 21:50 UTCJul 7, 23:40 UTC1h 50m
2026-07-07 SKW4767 - Jul 7, 20:00 UTCJul 7, 20:25 UTC25m
2026-07-07 SKW5343 - Jul 7, 18:05 UTCJul 7, 18:35 UTC30m

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 N629SY page for operator, model, and routing details .

Mode-S A83953 frequently asked

What is Mode-S code A83953?
A83953 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N629SY.
Where is Mode-S A83953 registered?
Mode-S code A83953 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 A83953 broadcasting right now?
Yes. Mode-S A83953 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A83953, octal 52034523, decimal 11,024,723.
What flights does A83953 operate?
Mode-S A83953 has broadcast 20 distinct callsigns, including SKW5493, SKW5781, SKW5766, SKW5642, SKW5635.