Apparatus

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sensors Mode-S transponder

A35B0B

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N315SY · operated by SKYWEST AIRLINES INC

Hex
A35B0B
Octal
50655413
Decimal
10,705,675
Country
US
Tail
N315SY
Type
E75L
No current signal · last broadcast 7h ago
Flights observed
613
Distinct callsigns
20
Country
US
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S A35B0B.

Country allocation

The ICAO 24-bit address A35B0B 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
SKW4112 SkyWest Airlines 9 2026-07-06
SKW3762 SkyWest Airlines 9 2026-06-04
SKW4152 - 8 2026-07-13
SKW4177 SkyWest Airlines 7 2026-05-27
SKW3953 - 7 2026-07-03
SKW3880 SkyWest Airlines 7 2026-06-13
SKW3818 SkyWest Airlines 7 2026-06-20
SKW3798 SkyWest Airlines 7 2026-05-23
SKW3729 - 7 2026-07-13
SKW4134 - 6 2026-06-28
SKW4087 - 6 2026-07-01
SKW4043 - 6 2026-06-25
SKW3999 - 6 2026-06-21
SKW3974 SkyWest Airlines 6 2026-05-03
SKW3903 - 6 2026-06-14
SKW3841 SkyWest Airlines 6 2026-05-29
SKW3833 SkyWest Airlines 6 2026-06-14
SKW4091 - 5 2026-06-24
SKW4042 SkyWest Airlines 5 2026-06-01
SKW4009 - 5 2026-07-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SKW3945 BNA → AUS Jul 14, 01:15 UTCJul 14, 03:10 UTC1h 55m
2026-07-13 SKW3945 AUS → BNA Jul 13, 21:55 UTCJul 14, 00:00 UTC2h 5m
2026-07-13 SKW3955 SLC → AUS Jul 13, 16:55 UTCJul 13, 19:30 UTC2h 35m
2026-07-13 SKW4152 ABQ → SLC Jul 13, 14:05 UTCJul 13, 15:15 UTC1h 10m
2026-07-13 SKW3729 SLC → ABQ Jul 13, 03:55 UTCJul 13, 05:15 UTC1h 20m
2026-07-12 SKW3896 - Jul 12, 23:15 UTCJul 13, 01:20 UTC2h 5m
2026-07-12 SKW3896 - Jul 12, 19:45 UTCJul 12, 21:50 UTC2h 5m
2026-07-12 SKW3681 BUR → SLC Jul 12, 17:07 UTCJul 12, 18:35 UTC1h 28m
2026-07-12 SKW3681 BUR → SLC Jul 12, 17:01 UTCJul 12, 18:40 UTC1h 40m
2026-07-12 SKW3681 - Jul 12, 14:15 UTCJul 12, 16:01 UTC1h 45m
2026-07-11 SKW3915 AUS → SLC Jul 11, 15:30 UTCJul 12, 03:20 UTC11h 50m
2026-07-11 SKW4088 - Jul 11, 12:10 UTCJul 11, 13:30 UTC1h 20m
2026-07-11 SKW3952 - Jul 11, 02:50 UTCJul 11, 04:10 UTC1h 20m
2026-07-10 SKW4028 - Jul 10, 18:20 UTCJul 10, 20:45 UTC2h 25m
2026-07-10 SKW4028 CMH → AUS Jul 10, 18:09 UTCJul 10, 20:34 UTC2h 25m
2026-07-10 SKW4028 - Jul 10, 14:40 UTCJul 10, 17:05 UTC2h 25m
2026-07-10 SKW4088 - Jul 10, 12:05 UTCJul 10, 13:25 UTC1h 20m
2026-07-10 SKW3952 AUS → MEM Jul 10, 01:26 UTCJul 10, 02:37 UTC1h 11m
2026-07-10 SKW3952 - Jul 10, 01:20 UTCJul 10, 02:35 UTC1h 15m
2026-07-09 SKW4016 MSY → AUS Jul 9, 21:00 UTCJul 9, 22:15 UTC1h 15m
2026-07-09 SKW141E AUS → MSY Jul 9, 18:52 UTCJul 9, 20:00 UTC1h 8m
2026-07-09 SKW141E AUS → MSY Jul 9, 18:50 UTCJul 9, 20:05 UTC1h 15m
2026-07-09 SKW3876 DEN → AUS Jul 9, 16:05 UTCJul 9, 17:50 UTC1h 45m
2026-07-09 SKW3876 AUS → DEN Jul 9, 12:45 UTCJul 9, 14:35 UTC1h 50m
2026-07-09 SKW4175 - Jul 9, 10:25 UTCJul 9, 11:10 UTC45m
2026-07-09 SKW4067 - Jul 9, 04:15 UTCJul 9, 04:45 UTC30m
2026-07-09 SKW4067 AUS → MFE Jul 9, 04:18 UTCJul 9, 05:01 UTC43m
2026-07-08 SKW4027 - Jul 8, 22:45 UTCJul 9, 00:50 UTC2h 5m
2026-07-08 SKW4027 AUS → IND Jul 8, 19:35 UTCJul 8, 21:50 UTC2h 15m
2026-07-08 SKW4101 - Jul 8, 15:35 UTCJul 8, 17:40 UTC2h 5m
2026-07-08 SKW4101 AUS → IND Jul 8, 12:15 UTCJul 8, 14:20 UTC2h 5m
2026-07-07 SKW4053 ATL → EVV Jul 7, 22:10 UTCJul 7, 23:00 UTC50m
2026-07-07 SKW4053 ATL → EVV Jul 7, 20:10 UTCJul 7, 20:55 UTC45m
2026-07-07 SKW4620 - Jul 7, 17:00 UTCJul 7, 18:50 UTC1h 50m
2026-07-07 SKW4620 BNA → AUS Jul 7, 17:05 UTCJul 7, 18:49 UTC1h 44m
2026-07-07 SKW3960 AUS → BNA Jul 7, 14:10 UTCJul 7, 16:00 UTC1h 50m
2026-07-07 SKW4180 DTW → ATL Jul 7, 10:30 UTCJul 7, 12:55 UTC2h 25m
2026-07-07 SKW3852 - Jul 7, 00:20 UTCJul 7, 01:30 UTC1h 10m
2026-07-07 SKW3852 PSP → SLC Jul 7, 00:20 UTCJul 7, 01:29 UTC1h 9m
2026-07-06 SKW3852 - Jul 6, 21:50 UTCJul 6, 23:05 UTC1h 15m
2026-07-06 SKW4112 JFK → ORD Jul 6, 19:55 UTCJul 6, 20:35 UTC40m
2026-07-06 SKW4112 JFK → ORD Jul 6, 19:24 UTCJul 6, 20:29 UTC1h 5m
2026-07-06 SKW4112 JFK → ORD Jul 6, 17:05 UTCJul 6, 18:10 UTC1h 5m
2026-07-06 SKW4009 - Jul 6, 02:55 UTCJul 6, 04:40 UTC1h 45m
2026-07-05 SKW3585 SLC → YVR Jul 5, 23:25 UTCJul 6, 01:20 UTC1h 55m
2026-07-05 SKW3804 - Jul 5, 20:05 UTCJul 5, 21:10 UTC1h 5m
2026-07-05 SKW3804 FCA → SLC Jul 5, 19:52 UTCJul 5, 21:05 UTC1h 13m
2026-07-05 SKW3804 - Jul 5, 17:10 UTCJul 5, 18:25 UTC1h 15m
2026-07-05 SKW4152 MEM → LGA Jul 5, 14:05 UTCJul 5, 15:25 UTC1h 20m
2026-07-05 SKW3729 - Jul 5, 02:50 UTCJul 5, 04:05 UTC1h 15m

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 N315SY page for operator, model, and routing details .

Mode-S A35B0B frequently asked

What is Mode-S code A35B0B?
A35B0B is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N315SY.
Where is Mode-S A35B0B registered?
Mode-S code A35B0B 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 A35B0B broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A35B0B, octal 50655413, decimal 10,705,675.
What flights does A35B0B operate?
Mode-S A35B0B has broadcast 20 distinct callsigns, including SKW4112, SKW3762, SKW4152, SKW4177, SKW3953.