Apparatus

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sensors Mode-S transponder

A35EC2

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N316SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A35EC2
Octal
50657302
Decimal
10,706,626
Country
US
Tail
N316SY
Type
E75L
No current signal · last broadcast Jul 26, 22:30 UTC
Flights observed
743
Distinct callsigns
20
Country
US
Last broadcast
Jul 26, 22:30 UTC

Last known position

Most recent position reported by Mode-S A35EC2.

Country allocation

The ICAO 24-bit address A35EC2 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
SKW3991 SkyWest Airlines 14 2026-07-20
SKW4099 SkyWest Airlines 13 2026-07-21
SKW3894 SkyWest Airlines 13 2026-07-26
SKW3883 SkyWest Airlines 11 2026-07-21
SKW4127 - 10 2026-07-19
SKW3902 - 10 2026-07-21
SKW3755 SkyWest Airlines 10 2026-07-26
SKW4077 SkyWest Airlines 9 2026-07-22
SKW3999 - 9 2026-07-08
SKW3802 - 8 2026-06-25
SKW3773 SkyWest Airlines 8 2026-07-24
SKW3754 - 8 2026-06-30
SKW4170 SkyWest Airlines 7 2026-04-22
SKW4070 SkyWest Airlines 7 2026-06-19
SKW3950 SkyWest Airlines 7 2026-05-06
SKW3874 - 7 2026-06-22
SKW3759 - 7 2026-07-03
SKW3746 SkyWest Airlines 7 2026-07-21
SKW3743 - 7 2026-07-21
SKW3725 SkyWest Airlines 7 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SKW3894 PHX → LAX Jul 26, 21:15 UTCJul 26, 22:20 UTC1h 5m
2026-07-26 SKW3755 LAX → SMF Jul 26, 18:30 UTCJul 26, 19:40 UTC1h 10m
2026-07-26 SKW3755 LAX → SMF Jul 26, 16:30 UTCJul 26, 17:30 UTC1h 0m
2026-07-26 SKW3725 SBN → ATL Jul 26, 13:30 UTCJul 26, 15:30 UTC2h 0m
2026-07-26 SKW3692 SLC → OAK Jul 26, 02:50 UTCJul 26, 03:55 UTC1h 5m
2026-07-26 SKW3857 SJC → SEA Jul 26, 00:50 UTCJul 26, 01:40 UTC50m
2026-07-25 SKW3857 SJC → SEA Jul 25, 22:55 UTCJul 25, 23:35 UTC40m
2026-07-25 SKW3735 SJC → LAX Jul 25, 21:00 UTCJul 25, 21:50 UTC50m
2026-07-25 SKW3735 SJC → LAX Jul 25, 18:55 UTCJul 25, 19:40 UTC45m
2026-07-25 SKW3953 JFK → ORD Jul 25, 17:10 UTCJul 25, 17:40 UTC30m
2026-07-25 SKW3953 JFK → ORD Jul 25, 14:45 UTCJul 25, 15:15 UTC30m
2026-07-25 SKW4008 DTW → MKE Jul 25, 12:45 UTCJul 25, 13:15 UTC30m
2026-07-25 SKW4008 DTW → MKE Jul 25, 12:46 UTCJul 25, 13:08 UTC22m
2026-07-25 SKW4472 SEA → PDX Jul 25, 07:20 UTCJul 25, 07:55 UTC35m
2026-07-25 SKW3923 OAK → LAX Jul 25, 05:15 UTCJul 25, 05:50 UTC35m
2026-07-25 SKW3923 OAK → LAX Jul 25, 04:00 UTCJul 25, 04:30 UTC30m
2026-07-25 SKW4165 MSN → MSP Jul 25, 01:45 UTCJul 25, 02:35 UTC50m
2026-07-25 SKW4145 DTW → YUL Jul 25, 00:10 UTCJul 25, 00:50 UTC40m
2026-07-24 SKW3958 SLC → PSC Jul 24, 21:45 UTCJul 24, 22:45 UTC1h 0m
2026-07-24 SKW3773 SEA → SMF Jul 24, 19:00 UTCJul 24, 20:40 UTC1h 40m
2026-07-24 SKW3696 BWI → BOS Jul 24, 13:35 UTCJul 24, 16:10 UTC2h 35m
2026-07-24 SKW3576 LAX → GEG Jul 24, 05:20 UTCJul 24, 07:20 UTC2h 0m
2026-07-24 SKW4087 SAN → LAX Jul 24, 03:40 UTCJul 24, 04:05 UTC25m
2026-07-24 SKW4087 SAN → LAX Jul 24, 01:55 UTCJul 24, 02:25 UTC30m
2026-07-23 SKW3894 PHX → LAX Jul 23, 23:35 UTCJul 24, 00:40 UTC1h 5m
2026-07-23 SKW3894 PHX → LAX Jul 23, 21:30 UTCJul 23, 22:35 UTC1h 5m
2026-07-23 SKW3755 LAX → SMF Jul 23, 18:30 UTCJul 23, 19:35 UTC1h 5m
2026-07-23 SKW3755 LAX → SMF Jul 23, 16:20 UTCJul 23, 17:20 UTC1h 0m
2026-07-23 SKW3725 SBN → ATL Jul 23, 13:25 UTCJul 23, 15:15 UTC1h 50m
2026-07-23 SKW4148 LAX → BOI Jul 23, 03:45 UTCJul 23, 05:20 UTC1h 35m
2026-07-22 SKW3799 MDW → MSP Jul 22, 23:30 UTCJul 23, 01:50 UTC2h 20m
2026-07-22 SKW3794 SJC → SEA Jul 22, 20:20 UTCJul 22, 22:30 UTC2h 10m
2026-07-22 SKW4119 - Jul 22, 17:55 UTCJul 22, 18:55 UTC1h 0m
2026-07-22 SKW4119 PHX → LAX Jul 22, 17:53 UTCJul 22, 18:54 UTC1h 1m
2026-07-22 SKW4119 - Jul 22, 15:35 UTCJul 22, 16:35 UTC1h 0m
2026-07-22 SKW4057 EWR → BOS Jul 22, 13:15 UTCJul 22, 14:15 UTC1h 0m
2026-07-22 SKW4077 LAX → PHX Jul 22, 03:25 UTCJul 22, 04:30 UTC1h 5m
2026-07-22 SKW4077 LAX → PHX Jul 22, 03:26 UTCJul 22, 04:21 UTC55m
2026-07-22 SKW4077 LAX → PHX Jul 22, 00:55 UTCJul 22, 01:55 UTC1h 0m
2026-07-21 SKW3902 - Jul 21, 22:35 UTCJul 21, 23:40 UTC1h 5m
2026-07-21 SKW3902 - Jul 21, 20:05 UTCJul 21, 21:05 UTC1h 0m
2026-07-21 SKW4099 SJC → LAX Jul 21, 17:40 UTCJul 21, 18:45 UTC1h 5m
2026-07-21 SKW4099 SJC → LAX Jul 21, 15:25 UTCJul 21, 16:25 UTC1h 0m
2026-07-21 SKW3743 - Jul 21, 13:35 UTCJul 21, 14:00 UTC25m
2026-07-21 SKW3746 LAX → SAN Jul 21, 06:05 UTCJul 21, 06:35 UTC30m
2026-07-21 SKW3883 MSP → MDW Jul 21, 03:40 UTCJul 21, 04:40 UTC1h 0m
2026-07-21 SKW3883 MSP → MDW Jul 21, 03:25 UTCJul 21, 04:34 UTC1h 9m
2026-07-21 SKW3883 MSP → MDW Jul 21, 01:25 UTCJul 21, 02:15 UTC50m
2026-07-20 SKW3701 BOS → CLE Jul 20, 22:15 UTCJul 21, 00:10 UTC1h 54m
2026-07-20 SKW3701 BOS → CLE Jul 20, 22:18 UTCJul 20, 23:56 UTC1h 38m

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 N316SY page for operator, model, and routing details .

Mode-S A35EC2 frequently asked

What is Mode-S code A35EC2?
A35EC2 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N316SY.
Where is Mode-S A35EC2 registered?
Mode-S code A35EC2 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 A35EC2 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A35EC2, octal 50657302, decimal 10,706,626.
What flights does A35EC2 operate?
Mode-S A35EC2 has broadcast 20 distinct callsigns, including SKW3991, SKW4099, SKW3894, SKW3883, SKW4127.