Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 Jul 26, 22:45 UTC
Flights observed
689
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:45 UTC

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 - 12 2026-07-20
SKW4177 - 9 2026-07-18
SKW3762 SkyWest Airlines 9 2026-06-04
SKW3750 SkyWest Airlines 9 2026-07-26
SKW4152 - 8 2026-07-13
SKW4028 - 7 2026-07-16
SKW3953 - 7 2026-07-03
SKW3880 SkyWest Airlines 7 2026-06-13
SKW3832 SkyWest Airlines 7 2026-07-23
SKW3818 SkyWest Airlines 7 2026-06-20
SKW3798 SkyWest Airlines 7 2026-05-23
SKW3729 - 7 2026-07-13
SKW4134 - 6 2026-06-28
SKW4100 SkyWest Airlines 6 2026-07-25
SKW4087 - 6 2026-07-01
SKW4043 - 6 2026-06-25
SKW4027 - 6 2026-07-15
SKW3999 - 6 2026-06-21
SKW3974 SkyWest Airlines 6 2026-05-03
SKW3960 - 6 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW4104 ORD → JFK Jul 26, 19:35 UTCJul 26, 22:45 UTC3h 10m
2026-07-26 SKW3750 BOI → SEA Jul 26, 17:00 UTCJul 26, 18:10 UTC1h 10m
2026-07-26 SKW3750 BOI → SEA Jul 26, 16:50 UTCJul 26, 17:55 UTC1h 5m
2026-07-26 SKW3750 BOI → SEA Jul 26, 14:45 UTCJul 26, 15:55 UTC1h 10m
2026-07-26 SKW3991 ATL → HPN Jul 26, 04:25 UTCJul 26, 05:55 UTC1h 30m
2026-07-26 SKW3991 ATL → HPN Jul 26, 01:25 UTCJul 26, 03:20 UTC1h 55m
2026-07-25 SKW3789 SJC → SEA Jul 25, 22:30 UTCJul 26, 00:05 UTC1h 35m
2026-07-25 SKW168F SEA → SJC Jul 25, 19:45 UTCJul 25, 21:40 UTC1h 55m
2026-07-25 SKW3750 BOI → SEA Jul 25, 17:05 UTCJul 25, 18:25 UTC1h 20m
2026-07-25 SKW3750 BOI → SEA Jul 25, 14:30 UTCJul 25, 15:30 UTC1h 0m
2026-07-25 SKW4100 MDW → DTW Jul 25, 04:05 UTCJul 25, 05:40 UTC1h 35m
2026-07-25 SKW4100 MDW → DTW Jul 25, 01:15 UTCJul 25, 03:10 UTC1h 55m
2026-07-24 SKW3891 LAX → OAK Jul 24, 23:05 UTCJul 24, 23:45 UTC40m
2026-07-24 SKW3891 LAX → OAK Jul 24, 21:30 UTCJul 24, 22:00 UTC30m
2026-07-24 SKW3824 BMI → ATL Jul 24, 18:45 UTCJul 24, 19:30 UTC45m
2026-07-24 SKW3824 BMI → ATL Jul 24, 17:15 UTCJul 24, 17:50 UTC35m
2026-07-24 SKW4092 BZN → SEA Jul 24, 14:38 UTCJul 24, 15:59 UTC1h 21m
2026-07-24 SKW4092 SEA → SEA Jul 24, 03:10 UTCJul 24, 16:05 UTC12h 55m
2026-07-24 SKW3857 SJC → SEA Jul 24, 00:45 UTCJul 24, 01:35 UTC50m
2026-07-23 SKW3857 SJC → SEA Jul 23, 22:55 UTCJul 23, 23:40 UTC45m
2026-07-23 SKW4070 - Jul 23, 19:15 UTCJul 23, 21:30 UTC2h 15m
2026-07-23 SKW4070 SEA → ONT Jul 23, 16:00 UTCJul 23, 18:15 UTC2h 15m
2026-07-23 SKW4128 EUG → SEA Jul 23, 13:20 UTCJul 23, 14:10 UTC50m
2026-07-23 SKW3855 MSP → CID Jul 23, 05:55 UTCJul 23, 06:35 UTC40m
2026-07-23 SKW3832 GEG → SEA Jul 23, 03:10 UTCJul 23, 04:05 UTC55m
2026-07-23 SKW3832 GEG → SEA Jul 23, 01:20 UTCJul 23, 01:55 UTC35m
2026-07-22 SKW3789 SJC → SEA Jul 22, 22:15 UTCJul 22, 23:45 UTC1h 30m
2026-07-22 SKW168F SEA → SJC Jul 22, 19:05 UTCJul 22, 21:10 UTC2h 5m
2026-07-22 SKW156H GEG → SEA Jul 22, 17:00 UTCJul 22, 17:50 UTC50m
2026-07-22 SKW3830 OAK → LAX Jul 22, 14:45 UTCJul 22, 15:20 UTC35m
2026-07-22 SKW3830 OAK → LAX Jul 22, 14:34 UTCJul 22, 15:19 UTC45m
2026-07-22 SKW3991 ATL → HPN Jul 22, 05:05 UTCJul 22, 05:25 UTC20m
2026-07-21 SKW4174 RST → MSP Jul 21, 22:22 UTCJul 21, 23:47 UTC1h 25m
2026-07-21 SKW4174 RST → MSP Jul 21, 20:10 UTCJul 22, 00:00 UTC3h 50m
2026-07-21 SKW3681 BUR → SLC Jul 21, 17:05 UTCJul 21, 18:35 UTC1h 30m
2026-07-21 SKW3681 SLC → BUR Jul 21, 14:25 UTCJul 21, 16:00 UTC1h 35m
2026-07-21 SKW3676 - Jul 21, 01:50 UTCJul 21, 02:35 UTC45m
2026-07-20 SKW3676 - Jul 20, 23:35 UTCJul 21, 00:10 UTC35m
2026-07-20 SKW3676 SLC → BZN Jul 20, 23:35 UTCJul 21, 00:29 UTC54m
2026-07-20 SKW4112 - Jul 20, 19:25 UTCJul 20, 20:35 UTC1h 10m
2026-07-20 SKW4112 MSO → SLC Jul 20, 19:20 UTCJul 20, 20:28 UTC1h 8m
2026-07-20 SKW4112 - Jul 20, 17:20 UTCJul 20, 17:55 UTC35m
2026-07-20 SKW3856 - Jul 20, 02:20 UTCJul 20, 03:50 UTC1h 30m
2026-07-19 SKW3856 - Jul 19, 23:50 UTCJul 20, 01:20 UTC1h 30m
2026-07-19 SKW3908 ATL → CRW Jul 19, 19:45 UTCJul 19, 22:00 UTC2h 15m
2026-07-19 SKW3960 BNA → AUS Jul 19, 16:35 UTCJul 19, 18:25 UTC1h 50m
2026-07-19 SKW3960 AUS → BNA Jul 19, 13:35 UTCJul 19, 15:25 UTC1h 50m
2026-07-19 SKW3734 TPA → AUS Jul 19, 00:10 UTCJul 19, 02:25 UTC2h 15m
2026-07-18 SKW3734 AUS → TPA Jul 18, 20:15 UTCJul 18, 22:45 UTC2h 30m
2026-07-18 SKW4177 - Jul 18, 17:45 UTCJul 18, 18:35 UTC50m

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 Jul 26, 22:45 UTC.
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, SKW4177, SKW3762, SKW3750, SKW4152.