Apparatus

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sensors Mode-S transponder

A33EB1

ICAO 24-bit transponder address · allocated to United States

Currently assigned to N308SY · EMBRAER ERJ-170-200 (long wing) · operated by SKYWEST AIRLINES INC

Hex
A33EB1
Octal
50637261
Decimal
10,698,417
Country
US
Tail
N308SY
Type
E75L
No current signal · last broadcast Jul 24, 22:05 UTC
Flights observed
724
Distinct callsigns
20
Country
US
Last broadcast
Jul 24, 22:05 UTC

Last known position

Most recent position reported by Mode-S A33EB1.

Country allocation

The ICAO 24-bit address A33EB1 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
SKW4077 SkyWest Airlines 23 2026-06-12
SKW3902 SkyWest Airlines 23 2026-06-11
SKW3822 SkyWest Airlines 19 2026-07-21
SKW4119 SkyWest Airlines 18 2026-06-11
SKW3759 SkyWest Airlines 17 2026-07-22
SKW3951 SkyWest Airlines 11 2026-07-21
SKW3755 SkyWest Airlines 11 2026-06-14
SKW3842 SkyWest Airlines 10 2026-06-05
SKW3746 - 10 2026-06-15
SKW3743 SkyWest Airlines 10 2026-06-15
SKW3773 - 9 2026-07-22
SKW4099 - 8 2026-06-15
SKW3767 - 8 2026-07-10
SKW4142 SkyWest Airlines 7 2026-04-26
SKW3798 - 7 2026-07-20
SKW3680 SkyWest Airlines 7 2026-07-18
SKW4179 SkyWest Airlines 6 2026-04-18
SKW4104 - 6 2026-07-02
SKW4091 - 6 2026-06-19
SKW4070 SkyWest Airlines 6 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 SKW4621 CMH → DTW Jul 24, 21:30 UTCJul 24, 22:05 UTC35m
2026-07-24 SKW4621 CMH → DTW Jul 24, 19:45 UTCJul 24, 21:25 UTC1h 40m
2026-07-23 SKW3953 JFK → ORD Jul 23, 16:55 UTCJul 23, 17:30 UTC35m
2026-07-23 SKW3953 JFK → ORD Jul 23, 15:00 UTCJul 23, 15:30 UTC30m
2026-07-23 SKW3972 - Jul 23, 12:35 UTCJul 23, 13:15 UTC40m
2026-07-23 SKW4017 BIS → MSP Jul 23, 06:05 UTCJul 23, 06:45 UTC40m
2026-07-23 SKW4043 HPN → ATL Jul 23, 03:10 UTCJul 23, 04:40 UTC1h 30m
2026-07-23 SKW4043 HPN → ATL Jul 23, 00:30 UTCJul 23, 02:05 UTC1h 35m
2026-07-22 SKW3958 SLC → PSC Jul 22, 21:45 UTCJul 22, 22:50 UTC1h 5m
2026-07-22 SKW3773 - Jul 22, 18:55 UTCJul 22, 20:30 UTC1h 35m
2026-07-22 SKW3700 EWR → MSP Jul 22, 16:40 UTCJul 22, 17:45 UTC1h 5m
2026-07-22 SKW3700 EWR → MSP Jul 22, 14:15 UTCJul 22, 15:15 UTC1h 0m
2026-07-22 SKW3759 JFK → BNA Jul 22, 03:55 UTCJul 22, 05:05 UTC1h 10m
2026-07-22 SKW3759 JFK → BNA Jul 22, 01:50 UTCJul 22, 02:50 UTC1h 0m
2026-07-21 SKW3822 MSP → GRB Jul 21, 23:40 UTCJul 22, 00:35 UTC55m
2026-07-21 SKW3822 MSP → GRB Jul 21, 23:38 UTCJul 22, 00:25 UTC47m
2026-07-21 SKW3822 MSP → GRB Jul 21, 22:00 UTCJul 21, 22:45 UTC45m
2026-07-21 SKW3951 LAX → PHX Jul 21, 19:45 UTCJul 21, 20:45 UTC1h 0m
2026-07-21 SKW3951 LAX → PHX Jul 21, 17:45 UTCJul 21, 18:50 UTC1h 5m
2026-07-21 SKW3696 BWI → BOS Jul 21, 14:05 UTCJul 21, 16:25 UTC2h 20m
2026-07-21 SKW3576 LAX → GEG Jul 21, 04:30 UTCJul 21, 06:30 UTC2h 0m
2026-07-21 SKW3712 LAX → SMF Jul 21, 02:05 UTCJul 21, 03:15 UTC1h 10m
2026-07-20 SKW3712 LAX → SMF Jul 20, 23:50 UTCJul 21, 00:55 UTC1h 5m
2026-07-20 SKW3812 SLC → OAK Jul 20, 21:25 UTCJul 20, 22:30 UTC1h 5m
2026-07-20 SKW134F - Jul 20, 19:10 UTCJul 20, 20:10 UTC1h 0m
2026-07-20 SKW4451 SJC → LAX Jul 20, 17:15 UTCJul 20, 18:15 UTC1h 0m
2026-07-20 SKW4026 - Jul 20, 14:05 UTCJul 20, 15:30 UTC1h 25m
2026-07-20 SKW3798 - Jul 20, 00:25 UTCJul 20, 01:35 UTC1h 10m
2026-07-19 SKW3798 - Jul 19, 22:00 UTCJul 19, 23:05 UTC1h 5m
2026-07-19 SKW4112 MSO → SLC Jul 19, 19:34 UTCJul 19, 20:33 UTC59m
2026-07-19 SKW4112 SLC → SLC Jul 19, 17:10 UTCJul 19, 20:40 UTC3h 30m
2026-07-19 SKW4152 MEM → LGA Jul 19, 14:10 UTCJul 19, 15:35 UTC1h 25m
2026-07-18 SKW4098 MDW → MSP Jul 18, 22:15 UTCJul 18, 23:55 UTC1h 40m
2026-07-18 SKW3744 LAX → OAK Jul 18, 19:50 UTCJul 18, 20:55 UTC1h 5m
2026-07-18 SKW3680 IAD → MSP Jul 18, 15:55 UTCJul 18, 18:45 UTC2h 50m
2026-07-18 SKW4128 EUG → SEA Jul 18, 13:25 UTCJul 18, 14:10 UTC45m
2026-07-18 SKW3855 SEA → EUG Jul 18, 05:50 UTCJul 18, 06:40 UTC50m
2026-07-18 SKW3923 PDX → SEA Jul 18, 04:05 UTCJul 18, 04:40 UTC35m
2026-07-18 SKW3923 SEA → PDX Jul 18, 02:19 UTCJul 18, 02:50 UTC31m
2026-07-17 SKW4165 MSN → MSP Jul 17, 23:55 UTCJul 18, 00:39 UTC45m
2026-07-17 SKW4145 SEA → GEG Jul 17, 22:15 UTCJul 17, 23:00 UTC45m
2026-07-17 SKW4145 SEA → GEG Jul 17, 22:02 UTCJul 17, 22:55 UTC53m
2026-07-17 SKW3992 - Jul 17, 19:45 UTCJul 17, 20:20 UTC35m
2026-07-17 SKW3992 - Jul 17, 18:10 UTCJul 17, 18:44 UTC35m
2026-07-17 SKW4092 SEA → SEA Jul 17, 04:14 UTCJul 17, 15:55 UTC11h 40m
2026-07-17 SKW3857 SJC → SEA Jul 17, 02:20 UTCJul 17, 03:05 UTC45m
2026-07-17 SKW3857 SJC → SEA Jul 17, 00:45 UTCJul 17, 01:25 UTC40m
2026-07-16 SKW3878 MFR → SEA Jul 16, 22:10 UTCJul 16, 23:10 UTC1h 0m
2026-07-16 SKW3806 SLC → MFR Jul 16, 18:40 UTCJul 16, 20:05 UTC1h 25m
2026-07-16 SKW4006 - Jul 16, 15:40 UTCJul 16, 17:35 UTC1h 55m

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 N308SY page for operator, model, and routing details .

Mode-S A33EB1 frequently asked

What is Mode-S code A33EB1?
A33EB1 is an ICAO 24-bit transponder address. Allocated to United States. Assigned to N308SY.
Where is Mode-S A33EB1 registered?
Mode-S code A33EB1 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 A33EB1 broadcasting right now?
No active broadcast right now. Last signal was Jul 24, 22:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex A33EB1, octal 50637261, decimal 10,698,417.
What flights does A33EB1 operate?
Mode-S A33EB1 has broadcast 20 distinct callsigns, including SKW4077, SKW3902, SKW3822, SKW4119, SKW3759.