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sensors Mode-S transponder

A3338C

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N305SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A3338C
Octal
50631614
Decimal
10,695,564
Country
US
Tail
N305SY
Type
E75L
Broadcasting now · callsign SKW3857 · 24,000 ft
Flights observed
617
Distinct callsigns
20
Country
US
Last broadcast
9m ago

Current position

A3338C is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address A3338C 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
SKW3992 - 12 2026-07-14
SKW3903 - 10 2026-06-28
SKW4026 - 8 2026-07-03
SKW3989 - 8 2026-06-13
SKW4041 - 7 2026-07-14
SKW3956 - 7 2026-07-14
SKW3899 - 7 2026-06-21
SKW3841 - 7 2026-07-02
SKW3750 SkyWest Airlines 7 2026-05-19
SKW3699 - 7 2026-06-18
SKW4174 - 6 2026-06-23
SKW4035 - 6 2026-06-21
SKW3851 - 6 2026-06-21
SKW3820 - 6 2026-06-29
SKW3815 - 6 2026-06-27
SKW3769 - 6 2026-06-26
SKW3767 SkyWest Airlines 6 2026-05-25
SKW3707 - 6 2026-07-14
SKW3577 SkyWest Airlines 6 2026-06-03
SKW4444 SkyWest Airlines 5 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 SKW3857 - Jul 15, 00:50 UTCJul 15, 01:00 UTC10m
2026-07-14 SKW3857 SEA → GEG Jul 14, 22:55 UTCJul 14, 23:35 UTC40m
2026-07-14 SKW3992 - Jul 14, 19:50 UTCJul 14, 20:25 UTC35m
2026-07-14 SKW3992 - Jul 14, 17:55 UTCJul 14, 18:25 UTC30m
2026-07-14 SKW4041 SJC → SEA Jul 14, 14:30 UTCJul 14, 16:00 UTC1h 30m
2026-07-14 SKW4041 SJC → SEA Jul 14, 14:26 UTCJul 14, 15:57 UTC1h 31m
2026-07-14 SKW3956 SEA → SJC Jul 14, 04:30 UTCJul 14, 06:30 UTC2h 0m
2026-07-14 SKW3707 - Jul 14, 01:45 UTCJul 14, 03:15 UTC1h 30m
2026-07-13 SKW3707 SEA → SFO Jul 13, 22:10 UTCJul 14, 00:15 UTC2h 5m
2026-07-13 SKW3992 - Jul 13, 19:45 UTCJul 13, 20:15 UTC30m
2026-07-13 SKW3992 - Jul 13, 18:00 UTCJul 13, 18:30 UTC30m
2026-07-13 SKW4041 SJC → SEA Jul 13, 14:30 UTCJul 13, 16:05 UTC1h 35m
2026-07-13 SKW3956 SEA → SJC Jul 13, 04:15 UTCJul 13, 06:20 UTC2h 5m
2026-07-13 SKW3956 SEA → SJC Jul 13, 03:57 UTCJul 13, 06:04 UTC2h 7m
2026-07-13 SKW4124 EUG → SEA Jul 13, 01:05 UTCJul 13, 01:50 UTC45m
2026-07-12 SKW181H - Jul 12, 23:00 UTCJul 12, 23:55 UTC55m
2026-07-12 SKW3754 GEG → SEA Jul 12, 20:15 UTCJul 12, 21:10 UTC55m
2026-07-12 SKW3754 SEA → GEG Jul 12, 18:15 UTCJul 12, 19:01 UTC45m
2026-07-12 SKW4075 SMF → SEA Jul 12, 15:10 UTCJul 12, 16:35 UTC1h 25m
2026-07-12 SKW4131 SEA → SMF Jul 12, 03:35 UTCJul 12, 05:10 UTC1h 35m
2026-07-12 SKW4131 SEA → SMF Jul 12, 03:40 UTCJul 12, 05:08 UTC1h 28m
2026-07-12 SKW3918 - Jul 12, 01:30 UTCJul 12, 02:01 UTC30m
2026-07-11 SKW3918 SEA → PDX Jul 11, 23:50 UTCJul 12, 00:20 UTC30m
2026-07-11 SKW3679 - Jul 11, 19:05 UTCJul 11, 21:55 UTC2h 50m
2026-07-11 SKW138Y - Jul 11, 16:50 UTCJul 11, 18:00 UTC1h 10m
2026-07-11 SKW4106 MEV → LAX Jul 11, 14:10 UTCJul 11, 15:20 UTC1h 10m
2026-07-11 SKW3929 - Jul 11, 05:05 UTCJul 11, 06:01 UTC55m
2026-07-11 SKW3929 LAX → RNO Jul 11, 05:11 UTCJul 11, 06:05 UTC54m
2026-07-11 SKW4087 - Jul 11, 03:25 UTCJul 11, 03:50 UTC25m
2026-07-11 SKW4087 SAN → LAX Jul 11, 03:14 UTCJul 11, 03:50 UTC36m
2026-07-11 SKW4087 LAX → SAN Jul 11, 01:45 UTCJul 11, 02:20 UTC35m
2026-07-10 SKW3701 - Jul 10, 22:25 UTCJul 11, 00:20 UTC1h 55m
2026-07-10 SKW3959 SEA → BOI Jul 10, 19:45 UTCJul 10, 20:45 UTC1h 0m
2026-07-10 SKW3953 PDX → SEA Jul 10, 17:00 UTCJul 10, 17:40 UTC40m
2026-07-10 SKW3953 SEA → PDX Jul 10, 14:45 UTCJul 10, 15:15 UTC30m
2026-07-10 SKW4100 SJC → SEA Jul 10, 04:00 UTCJul 10, 05:45 UTC1h 45m
2026-07-10 SKW4100 SEA → SJC Jul 10, 01:05 UTCJul 10, 03:00 UTC1h 55m
2026-07-09 SKW3891 - Jul 9, 22:50 UTCJul 9, 23:30 UTC40m
2026-07-09 SKW3891 PSC → SEA Jul 9, 22:47 UTCJul 9, 23:25 UTC38m
2026-07-09 SKW3891 - Jul 9, 21:00 UTCJul 9, 21:35 UTC35m
2026-07-09 SKW3824 GEG → SEA Jul 9, 18:45 UTCJul 9, 19:30 UTC45m
2026-07-09 SKW3824 SEA → GEG Jul 9, 17:00 UTCJul 9, 17:45 UTC45m
2026-07-09 SKW3790 GEG → SEA Jul 9, 15:05 UTCJul 9, 15:50 UTC45m
2026-07-09 SKW3790 GEG → SEA Jul 9, 14:24 UTCJul 9, 15:47 UTC1h 23m
2026-07-09 SKW3677 SEA → GEG Jul 9, 03:15 UTCJul 9, 03:55 UTC40m
2026-07-09 SKW3677 SEA → GEG Jul 9, 03:07 UTCJul 9, 03:55 UTC48m
2026-07-09 SKW4124 EUG → SEA Jul 9, 01:00 UTCJul 9, 01:55 UTC55m
2026-07-08 SKW181H - Jul 8, 23:10 UTCJul 8, 23:55 UTC45m
2026-07-08 SKW3754 GEG → SEA Jul 8, 20:20 UTCJul 8, 21:05 UTC45m
2026-07-08 SKW3754 SEA → GEG Jul 8, 18:20 UTCJul 8, 19:00 UTC40m

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 N305SY page for operator, model, and routing details .

Mode-S A3338C frequently asked

What is Mode-S code A3338C?
A3338C is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N305SY.
Where is Mode-S A3338C registered?
Mode-S code A3338C 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 A3338C broadcasting right now?
Yes. Mode-S A3338C is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A3338C, octal 50631614, decimal 10,695,564.
What flights does A3338C operate?
Mode-S A3338C has broadcast 20 distinct callsigns, including SKW3992, SKW3903, SKW4026, SKW3989, SKW4041.